| Targeted Patent: Patent: US10771302B2 Filed: 2004-01-29 Issued: 2020-09-08 Patent Holder: (Original Assignee) Neo Wireless LLC (Current Assignee) Neo Wireless LLC Inventor(s): Xiaodong Li, Titus Lo, Kemin Li, Haiming Huang Title: Channel probing signal for a broadband communication system | Cross Reference / Shared Meaning between the Lines |
Charted Against: Patent: EP1130840A3 Filed: 2000-02-29 Issued: 2003-11-19 Patent Holder: (Original Assignee) Toshiba Corp (Current Assignee) Toshiba Corp Inventor(s): Takashi c/o Intellectual Property Div. Wakutsu Title: Spread-spectrum multicarrier modulation for cellular communication |
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| Targeted Patent: Patent: US10771302B2 Filed: 2004-01-29 Issued: 2020-09-08 Patent Holder: (Original Assignee) Neo Wireless LLC (Current Assignee) Neo Wireless LLC Inventor(s): Xiaodong Li, Titus Lo, Kemin Li, Haiming Huang Title: Channel probing signal for a broadband communication system | Cross Reference / Shared Meaning between the Lines |
Charted Against: Patent: US6643281B1 Filed: 1998-03-05 Issued: 2003-11-04 Patent Holder: (Original Assignee) AT&T Wireless Services Inc (Current Assignee) Clear Wireless LLC ; Clearwire IP Holdings LLC ; Clearwire Legacy LLC ; Clearwire Communications LLC Inventor(s): David James Ryan Title: Synchronization preamble method for OFDM waveforms in a communications system |
| [FEATURE ID: 1] mobile device, communication system | system, station, transmitter, satellite, receiver, transceiver, network | [FEATURE ID: 1] base station, remote station, remote station clock, wireless discrete multitone spread spectrum communications system |
| [TRANSITIVE ID: 2] comprising | of, having, with, by, containing, comprises, includes | [TRANSITIVE ID: 2] comprising, including |
| [TRANSITIVE ID: 3] receiving, probing | detecting, monitoring, processing, evaluating, recognizing, identifying, measuring | [TRANSITIVE ID: 3] receiving |
| [FEATURE ID: 4] signal, frequency domain, channel profile, transmission format, modulation, coding, pilot pattern, center portion | channel, transmission, sequence, waveform, preamble, frequency, burst | [FEATURE ID: 4] time window, synchronization signal, spread signal, error signal spread |
| [FEATURE ID: 5] base station | receiver, base, sender, host, master, transmission | [FEATURE ID: 5] source |
| [TRANSITIVE ID: 6] transmitting, estimating | generating, determining, constructing, receiving, creating, establishing, selecting | [TRANSITIVE ID: 6] forming, transmitting |
| [FEATURE ID: 7] response | connection, order, parallel, accordance, addition, conformity, proportion | [FEATURE ID: 7] response |
| [FEATURE ID: 8] code sequence | power, shape, frequency, waveform, code, spectrum, characteristic | [FEATURE ID: 8] phase |
| [TRANSITIVE ID: 9] modulated, configured, available | specified, defined, selected, provided, designated, indicated, set | [TRANSITIVE ID: 9] arranged, established |
| [FEATURE ID: 10] time domain, spectrum | time, space, duration, frequency, period, energy, sequence | [FEATURE ID: 10] bandwidth, base station reference instant |
| [FEATURE ID: 11] uplink signals, other mobile devices, uplink control signals, uplink data signals, subcarriers | resources, signals, channels, carriers, transmissions, symbols, frames | [FEATURE ID: 11] tone frequencies, outgoing frequencies, incoming frequencies |
| [FEATURE ID: 12] claim | aspect, clause, item, embodiment, the claim, feature, clam | [FEATURE ID: 12] claim |
| [FEATURE ID: 13] subsequent transmission | transmission, beacon, communication, frame, signal, burst, preamble | [FEATURE ID: 13] synchronization burst |
| [FEATURE ID: 14] time period | time, duration, slot, delay, interval, window | [FEATURE ID: 14] remote station reference instant |
| [FEATURE ID: 15] transmission power | transmission, detection, generation, the, receipt, reception | [FEATURE ID: 15] arrival |
| 1 . A communication method for a mobile device [FEATURE ID: 1] in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system [FEATURE ID: 1] , the method comprising [TRANSITIVE ID: 2] : receiving [TRANSITIVE ID: 3] a request for a probing [TRANSITIVE ID: 3] signal [FEATURE ID: 4] from a base station [FEATURE ID: 5] in the system ; and transmitting [TRANSITIVE ID: 6] , in response [FEATURE ID: 7] to the received request , the probing signal with a code sequence [FEATURE ID: 8] modulated [TRANSITIVE ID: 9] in the frequency domain [FEATURE ID: 4] , wherein : the probing signal is configured [TRANSITIVE ID: 9] to overlap , in the time domain [FEATURE ID: 10] , with uplink signals [FEATURE ID: 11] transmitted over an uplink frequency band by other mobile devices [FEATURE ID: 11] in the system ; and the probing signal is configured to occupy a portion of spectrum [FEATURE ID: 10] in the uplink frequency band not designated for transmission of uplink control signals [FEATURE ID: 11] in the system . 2 . The method of claim [FEATURE ID: 12] 1 , wherein the probing signal provides information for the base station to estimate a channel profile [FEATURE ID: 4] in the frequency domain . 3 . The method of claim 2 , wherein the mobile device receives a subsequent transmission [FEATURE ID: 13] from the base station that has been beamformed using the estimated channel profile . 4 . The method of claim 1 , wherein the probing signal provides information for the base station to determine a transmission format [FEATURE ID: 4] for a subsequent transmission . 5 . The method of claim 4 , wherein the transmission format comprises a modulation [FEATURE ID: 4] / coding [FEATURE ID: 4] or pilot pattern [FEATURE ID: 4] . 6 . The method of claim 1 , wherein the portion of spectrum is available [FEATURE ID: 9] for transmission of uplink data signals [FEATURE ID: 11] by other mobile devices in the system during a time period [FEATURE ID: 14] when the portion of the spectrum is not occupied by the probing signal . 7 . The method of claim 1 , wherein the portion of spectrum is within a center portion [FEATURE ID: 4] of the uplink frequency band and subcarriers [FEATURE ID: 11] for the transmission of uplink control signals are within an outer portion of the uplink frequency band . 8 . A communication method for a base station in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the method comprising : transmitting a request for a probing signal to a mobile device in the system ; and receiving the probing signal from the mobile device , wherein : the probing signal contains a code sequence modulated in the frequency domain ; the probing signal overlaps , in the time domain , with uplink signals transmitted over an uplink frequency band by other mobile devices in the system ; and the probing signal occupies a portion of spectrum in the uplink frequency band not designated for transmission of uplink control signals in the system . 9 . The method of claim 8 , further comprising estimating [FEATURE ID: 6] , based on the received probing signal , a channel profile in the frequency domain . 10 . The method of claim 9 , further comprising using the channel profile to determine a transmission format for a subsequent transmission over the channel . 11 . The method of claim 10 , wherein the transmission format comprises a modulation / coding or pilot pattern . 12 . The method of claim 9 , further comprising using the channel profile for beamforming in a subsequent transmission to the mobile device . 13 . The method of claim 8 , wherein the portion of spectrum is available for transmission of uplink data signals by other mobile devices in the system during a time period when the portion of the spectrum is not occupied by the probing signal . 14 . The method of claim 8 , wherein the portion of spectrum is within a center portion of the uplink frequency band and subcarriers for the transmission of uplink control signals are within an outer portion of the uplink frequency band . 15 . A communication method for an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the method comprising : sending a request for a probing signal to a mobile device from a base station in the system ; and responding by the mobile device to the request by transmitting the probing signal with a code sequence modulated in the frequency domain , wherein : the probing signal is configured to overlap , in the time domain , with uplink signals transmitted over an uplink frequency band by other mobile devices in the system ; and the probing signal is configured to occupy a portion of spectrum in the uplink frequency band not designated for transmission of uplink control signals in the system . 16 . The method of claim 15 , wherein transmission power [FEATURE ID: 15] |
1 . A highly bandwidth [FEATURE ID: 10] - efficient communications method , comprising [TRANSITIVE ID: 2] : forming [TRANSITIVE ID: 6] a synchronization burst [FEATURE ID: 13] at an antenna element of a base station [FEATURE ID: 1] , including [TRANSITIVE ID: 2] a plurality of tone frequencies [FEATURE ID: 11] arranged [TRANSITIVE ID: 9] in a distinctive orthogonal frequency division multiplexed pattern unique to the base station ; transmitting [TRANSITIVE ID: 6] the synchronization burst from the antenna element at a base station reference instant [FEATURE ID: 10] of time ; receiving [TRANSITIVE ID: 3] the synchronization burst at a remote station [FEATURE ID: 1] during a remote station receive time window [FEATURE ID: 4] which begins at a remote station reference instant [FEATURE ID: 14] of time established [TRANSITIVE ID: 9] by a remote station clock [FEATURE ID: 1] ; recognizing the pattern of the plurality of tone frequencies as having the base station as the source [FEATURE ID: 5] of the synchronization burst ; transmitting an error signal back to the base station at an instant referenced with respect to the remote station reference instant of time , in response [FEATURE ID: 7] to the recognizing ; deriving from the error signal a correction value related to a relative time error between the base station reference instant of time and the remote station reference instant of time ; and transmitting the correction value to the remote station to correct the remote station clock . 2 . The highly bandwidth - efficient communications method of claim [FEATURE ID: 12] 1 , wherein deriving further comprises : deriving from the error signal a second value related to a relative phase error between the base station and the remote station ; and transmitting the second value to the remote station to correct the remote station . 3 . The highly bandwidth - efficient communications method of claim 1 , wherein forming the synchronization burst comprises : selecting the distinctive orthogonal frequency division multiplexed pattern unique to the base station ; computing spreading weights at the base station to spread an outgoing synchronization signal over a plurality of outgoing frequencies [FEATURE ID: 11] , using the pattern ; and spreading the synchronization signal [FEATURE ID: 4] over the plurality of outgoing frequencies using the computed spreading weights , thereby forming the synchronization burst . 4 . The highly bandwidth - efficient communications method of claim 1 , wherein deriving the error signal at the base station comprises : receiving at the base station a spread signal [FEATURE ID: 4] comprising an incoming signal that includes the error signal spread [FEATURE ID: 4] over a plurality of incoming frequencies [FEATURE ID: 11] ; adaptively despreading the spread signal received at the base station by using despreading weights , recovering the error signal ; deriving from the error signal the relative time error ; comparing the relative time error with a desired relative time difference value ; calculating the correction value in response to the comparing , to minimize a difference between the relative time error and the desired relative time difference value . 5 . The highly bandwidth - efficient communications method of claim 1 , wherein the base station is part of a wireless discrete multitone spread spectrum communications system [FEATURE ID: 1] . 6 . The highly bandwidth - efficient communications method of claim 1 , wherein a time of arrival [FEATURE ID: 15] of the error signal at the base station is used to derive the correction value . 7 . The highly bandwidth - efficient communications method of claim 1 , wherein a phase [FEATURE ID: 8] |
| Targeted Patent: Patent: US10771302B2 Filed: 2004-01-29 Issued: 2020-09-08 Patent Holder: (Original Assignee) Neo Wireless LLC (Current Assignee) Neo Wireless LLC Inventor(s): Xiaodong Li, Titus Lo, Kemin Li, Haiming Huang Title: Channel probing signal for a broadband communication system | Cross Reference / Shared Meaning between the Lines |
Charted Against: Patent: US20030179776A1 Filed: 2001-06-29 Issued: 2003-09-25 Patent Holder: (Original Assignee) Individual (Current Assignee) Panasonic Holdings Corp Inventor(s): Atsushi Sumasu, Hiroaki Sudo, Kenichi Miyoshi Title: Multicarrier transmitter, multicarrier receiver, and multicarrier wireless communication method |
| [FEATURE ID: 1] communication method, mobile device, method, base station, frequency domain, time domain, transmission format, modulation, time period, channel | transmission, system, transmitter, signal, preamble, receiver, transceiver | [FEATURE ID: 1] multicarrier transmission apparatus, way, transmission unit, frequency direction, multicarrier reception apparatus |
| [FEATURE ID: 2] communication system, system, portion, center portion, transmission power | channel, transmission, sector, frame, cell, packet, slot | [FEATURE ID: 2] pattern, predetermined range, data, pilot carrier, synchronization |
| [TRANSITIVE ID: 3] comprising | of, containing, using, with, including, involving, by | [TRANSITIVE ID: 3] comprising, having |
| [TRANSITIVE ID: 4] receiving, transmitting, estimating | processing, sending, providing, determining, obtaining, supplying, forming | [TRANSITIVE ID: 4] generating, inserting, channel estimating |
| [FEATURE ID: 5] request | command, notification, response, message | [FEATURE ID: 5] cell identification signal |
| [FEATURE ID: 6] signal, channel profile, subsequent transmission, coding, pilot pattern | sequence, channel, pilot, frequency, symbol, waveform, data | [FEATURE ID: 6] pilot signal string, multicarrier CDMA system, signal |
| [FEATURE ID: 7] code sequence | sequence, phase, data, code, shape, number, transmission | [FEATURE ID: 7] time sequence, same cycle, same pattern, value |
| [TRANSITIVE ID: 8] modulated, configured | assigned, arranged, used, transmitted, located, shifted, specified | [TRANSITIVE ID: 8] sent |
| [FEATURE ID: 9] uplink signals, other mobile devices, spectrum, uplink data signals, subcarriers | signals, channels, frames, bands, symbols, resources, bursts | [FEATURE ID: 9] carriers, subcarriers, pilot signals, pilot carrier signal strings, cells |
| [FEATURE ID: 10] transmission | demodulation, processing, detection, operation, measurement, identification, correction | [FEATURE ID: 10] channel estimation, estimation |
| [FEATURE ID: 11] uplink control signals | symbols, data, cells, transmission | [FEATURE ID: 11] DC components |
| [FEATURE ID: 12] claim | requirement, step, the claim, cl claim, paragraph, embodiment, feature | [FEATURE ID: 12] claim |
| [FEATURE ID: 13] power control | control, transmission, modulation, measurement | [FEATURE ID: 13] compensation processing |
| 1 . A communication method [FEATURE ID: 1] for a mobile device [FEATURE ID: 1] in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system [FEATURE ID: 2] , the method [FEATURE ID: 1] comprising [TRANSITIVE ID: 3] : receiving [TRANSITIVE ID: 4] a request [FEATURE ID: 5] for a probing signal [FEATURE ID: 6] from a base station [FEATURE ID: 1] in the system [FEATURE ID: 2] ; and transmitting [TRANSITIVE ID: 4] , in response to the received request , the probing signal with a code sequence [FEATURE ID: 7] modulated [TRANSITIVE ID: 8] in the frequency domain [FEATURE ID: 1] , wherein : the probing signal is configured [TRANSITIVE ID: 8] to overlap , in the time domain [FEATURE ID: 1] , with uplink signals [FEATURE ID: 9] transmitted over an uplink frequency band by other mobile devices [FEATURE ID: 9] in the system ; and the probing signal is configured to occupy a portion [FEATURE ID: 2] of spectrum [FEATURE ID: 9] in the uplink frequency band not designated for transmission [FEATURE ID: 10] of uplink control signals [FEATURE ID: 11] in the system . 2 . The method of claim [FEATURE ID: 12] 1 , wherein the probing signal provides information for the base station to estimate a channel profile [FEATURE ID: 6] in the frequency domain . 3 . The method of claim 2 , wherein the mobile device receives a subsequent transmission [FEATURE ID: 6] from the base station that has been beamformed using the estimated channel profile . 4 . The method of claim 1 , wherein the probing signal provides information for the base station to determine a transmission format [FEATURE ID: 1] for a subsequent transmission . 5 . The method of claim 4 , wherein the transmission format comprises a modulation [FEATURE ID: 1] / coding [FEATURE ID: 6] or pilot pattern [FEATURE ID: 6] . 6 . The method of claim 1 , wherein the portion of spectrum is available for transmission of uplink data signals [FEATURE ID: 9] by other mobile devices in the system during a time period [FEATURE ID: 1] when the portion of the spectrum is not occupied by the probing signal . 7 . The method of claim 1 , wherein the portion of spectrum is within a center portion [FEATURE ID: 2] of the uplink frequency band and subcarriers [FEATURE ID: 9] for the transmission of uplink control signals are within an outer portion of the uplink frequency band . 8 . A communication method for a base station in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the method comprising : transmitting a request for a probing signal to a mobile device in the system ; and receiving the probing signal from the mobile device , wherein : the probing signal contains a code sequence modulated in the frequency domain ; the probing signal overlaps , in the time domain , with uplink signals transmitted over an uplink frequency band by other mobile devices in the system ; and the probing signal occupies a portion of spectrum in the uplink frequency band not designated for transmission of uplink control signals in the system . 9 . The method of claim 8 , further comprising estimating [FEATURE ID: 4] , based on the received probing signal , a channel profile in the frequency domain . 10 . The method of claim 9 , further comprising using the channel profile to determine a transmission format for a subsequent transmission over the channel [FEATURE ID: 1] . 11 . The method of claim 10 , wherein the transmission format comprises a modulation / coding or pilot pattern . 12 . The method of claim 9 , further comprising using the channel profile for beamforming in a subsequent transmission to the mobile device . 13 . The method of claim 8 , wherein the portion of spectrum is available for transmission of uplink data signals by other mobile devices in the system during a time period when the portion of the spectrum is not occupied by the probing signal . 14 . The method of claim 8 , wherein the portion of spectrum is within a center portion of the uplink frequency band and subcarriers for the transmission of uplink control signals are within an outer portion of the uplink frequency band . 15 . A communication method for an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the method comprising : sending a request for a probing signal to a mobile device from a base station in the system ; and responding by the mobile device to the request by transmitting the probing signal with a code sequence modulated in the frequency domain , wherein : the probing signal is configured to overlap , in the time domain , with uplink signals transmitted over an uplink frequency band by other mobile devices in the system ; and the probing signal is configured to occupy a portion of spectrum in the uplink frequency band not designated for transmission of uplink control signals in the system . 16 . The method of claim 15 , wherein transmission power [FEATURE ID: 2] of the probing signal is under power control [FEATURE ID: 13] |
1 . A multicarrier transmission apparatus [FEATURE ID: 1] comprising [TRANSITIVE ID: 3] : pilot signal generating [TRANSITIVE ID: 4] means for generating a pilot signal string [FEATURE ID: 6] having [TRANSITIVE ID: 3] a time - varying pattern [FEATURE ID: 2] ; and pilot signal inserting [TRANSITIVE ID: 4] means for inserting the pilot signal string divided into a plurality of carriers [FEATURE ID: 9] which are sent [TRANSITIVE ID: 8] in time sequence [FEATURE ID: 7] . 2 . The multicarrier transmission apparatus according to claim [FEATURE ID: 12] 1 , wherein the pilot signal inserting means allows subcarriers [FEATURE ID: 9] involving DC components [FEATURE ID: 11] to carry the pilot signal string generated by the pilot signal generating means . 3 . The multicarrier transmission apparatus according to claim 1 , wherein the pilot signal generating means generates said pilot signal string in such a way [FEATURE ID: 1] that the numbers of positive and negative pilot signals making up the pilot signal string are identical within a predetermined range [FEATURE ID: 2] . 4 . The multicarrier transmission apparatus according to claim 1 , wherein the pilot signal generating means generates pilot signals [FEATURE ID: 9] having a pattern of the same cycle [FEATURE ID: 7] as that a transmission unit [FEATURE ID: 1] . 5 . The multicarrier transmission apparatus according to claim 1 , wherein data [FEATURE ID: 2] is transmitted according to a multicarrier CDMA system [FEATURE ID: 6] . 6 . The multicarrier transmission apparatus according to claim 5 , wherein a cell identification signal [FEATURE ID: 5] is transmitted using a pilot carrier [FEATURE ID: 2] . 7 . The multicarrier transmission apparatus according to claim 6 , wherein pilot carrier signal strings [FEATURE ID: 9] are made orthogonal to one another between neighboring cells [FEATURE ID: 9] . 8 . The multicarrier transmission apparatus according to claim 5 , wherein pilot signals are spread also in a frequency direction [FEATURE ID: 1] . 9 . A multicarrier reception apparatus [FEATURE ID: 1] comprising : pilot signal extracting means for extracting pilot signals carried on a pilot carrier ; and channel estimating [FEATURE ID: 4] means for carrying out channel estimation [FEATURE ID: 10] by correlating a plurality of extracted pilot signals arranged in time sequence with the same pattern [FEATURE ID: 7] as that used on a transmitting side . 10 . A multicarrier reception apparatus comprising : pilot signal extracting means for extracting pilot signals carried on a pilot carrier ; frequency offset estimating means for estimating a frequency offset by correlating a plurality of extracted pilot signals arranged in time sequence with the same pattern as that used on a transmitting side ; and frequency offset compensating means for compensating the frequency offset using the frequency offset estimated value [FEATURE ID: 7] obtained by this frequency offset estimating means . 11 . The multicarrier reception apparatus according to claim 10 , wherein the frequency offset estimating means further carries out frequency offset estimation [FEATURE ID: 10] on the signal [FEATURE ID: 6] subjected to frequency offset compensation processing [FEATURE ID: 13] . 12 . A multicarrier reception apparatus comprising : pilot signal extracting means for extracting pilot signals carried on a pilot carrier ; and synchronization [FEATURE ID: 2] |
| Targeted Patent: Patent: US10771302B2 Filed: 2004-01-29 Issued: 2020-09-08 Patent Holder: (Original Assignee) Neo Wireless LLC (Current Assignee) Neo Wireless LLC Inventor(s): Xiaodong Li, Titus Lo, Kemin Li, Haiming Huang Title: Channel probing signal for a broadband communication system | Cross Reference / Shared Meaning between the Lines |
Charted Against: Patent: US6567383B1 Filed: 1998-02-18 Issued: 2003-05-20 Patent Holder: (Original Assignee) Sony International Europe GmbH (Current Assignee) Sony Deutschland GmbH Inventor(s): Ralf Böhnke Title: Header structure for TDD systems |
| [FEATURE ID: 1] communication method, method, signal, system, channel profile, transmission format, modulation, coding, pilot pattern | transmission, channel, scheme, sequence, network, frame, procedure | [FEATURE ID: 1] Wireless transmission method, system, cell, repeated, correlation technique |
| [FEATURE ID: 2] mobile device, base station | cell, station, terminal, user, subscriber, network, receiver | [FEATURE ID: 2] mobile station |
| [FEATURE ID: 3] communication system, frequency domain, time domain, time period, center portion, channel | slot, transmission, symbol, bandwidth, system, period, time | [FEATURE ID: 3] single time slot, structure, frequency |
| [TRANSITIVE ID: 4] comprising | having, including, includes, determining, compromising, understanding, by | [TRANSITIVE ID: 4] comprising, comprises |
| [TRANSITIVE ID: 5] receiving, transmitting | processing, sending, generating, providing, communicating, monitoring, identifying | [TRANSITIVE ID: 5] transmitting |
| [FEATURE ID: 6] code sequence, information | power, channel, frequency, access, carrier, phase, sequence | [FEATURE ID: 6] time synchronization |
| [FEATURE ID: 7] uplink signals, uplink control signals, subcarriers | signals, messages, bursts, packets, channels, transmissions, slots | [FEATURE ID: 7] data, frames, symbols |
| [FEATURE ID: 8] uplink frequency band | rach, uplink, ul, access, channel | [FEATURE ID: 8] uplink channel |
| [FEATURE ID: 9] other mobile devices | users, subscribers, mobile, transmitters, receivers, participants | [FEATURE ID: 9] mobile stations |
| [FEATURE ID: 10] transmission, transmission power | delivery, reception, receipt, operation, propagation, communication, provision | [FEATURE ID: 10] transmission |
| [FEATURE ID: 11] claim | requirement, step, the claim, paragraph, item, embodiment, aspect | [FEATURE ID: 11] claim |
| [FEATURE ID: 12] subsequent transmission | beacon, broadcast, message, signal, channel | [FEATURE ID: 12] broadcast channel, general broadcast channel |
| [FEATURE ID: 13] uplink data signals | messages, data, information, requests, frames, channels, services | [FEATURE ID: 13] traffic slots, registration data |
| 1 . A communication method [FEATURE ID: 1] for a mobile device [FEATURE ID: 2] in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system [FEATURE ID: 3] , the method [FEATURE ID: 1] comprising [TRANSITIVE ID: 4] : receiving [TRANSITIVE ID: 5] a request for a probing signal [FEATURE ID: 1] from a base station [FEATURE ID: 2] in the system [FEATURE ID: 1] ; and transmitting [TRANSITIVE ID: 5] , in response to the received request , the probing signal with a code sequence [FEATURE ID: 6] modulated in the frequency domain [FEATURE ID: 3] , wherein : the probing signal is configured to overlap , in the time domain [FEATURE ID: 3] , with uplink signals [FEATURE ID: 7] transmitted over an uplink frequency band [FEATURE ID: 8] by other mobile devices [FEATURE ID: 9] in the system ; and the probing signal is configured to occupy a portion of spectrum in the uplink frequency band not designated for transmission [FEATURE ID: 10] of uplink control signals [FEATURE ID: 7] in the system . 2 . The method of claim [FEATURE ID: 11] 1 , wherein the probing signal provides information [FEATURE ID: 6] for the base station to estimate a channel profile [FEATURE ID: 1] in the frequency domain . 3 . The method of claim 2 , wherein the mobile device receives a subsequent transmission [FEATURE ID: 12] from the base station that has been beamformed using the estimated channel profile . 4 . The method of claim 1 , wherein the probing signal provides information for the base station to determine a transmission format [FEATURE ID: 1] for a subsequent transmission . 5 . The method of claim 4 , wherein the transmission format comprises a modulation [FEATURE ID: 1] / coding [FEATURE ID: 1] or pilot pattern [FEATURE ID: 1] . 6 . The method of claim 1 , wherein the portion of spectrum is available for transmission of uplink data signals [FEATURE ID: 13] by other mobile devices in the system during a time period [FEATURE ID: 3] when the portion of the spectrum is not occupied by the probing signal . 7 . The method of claim 1 , wherein the portion of spectrum is within a center portion [FEATURE ID: 3] of the uplink frequency band and subcarriers [FEATURE ID: 7] for the transmission of uplink control signals are within an outer portion of the uplink frequency band . 8 . A communication method for a base station in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the method comprising : transmitting a request for a probing signal to a mobile device in the system ; and receiving the probing signal from the mobile device , wherein : the probing signal contains a code sequence modulated in the frequency domain ; the probing signal overlaps , in the time domain , with uplink signals transmitted over an uplink frequency band by other mobile devices in the system ; and the probing signal occupies a portion of spectrum in the uplink frequency band not designated for transmission of uplink control signals in the system . 9 . The method of claim 8 , further comprising estimating , based on the received probing signal , a channel profile in the frequency domain . 10 . The method of claim 9 , further comprising using the channel profile to determine a transmission format for a subsequent transmission over the channel [FEATURE ID: 3] . 11 . The method of claim 10 , wherein the transmission format comprises a modulation / coding or pilot pattern . 12 . The method of claim 9 , further comprising using the channel profile for beamforming in a subsequent transmission to the mobile device . 13 . The method of claim 8 , wherein the portion of spectrum is available for transmission of uplink data signals by other mobile devices in the system during a time period when the portion of the spectrum is not occupied by the probing signal . 14 . The method of claim 8 , wherein the portion of spectrum is within a center portion of the uplink frequency band and subcarriers for the transmission of uplink control signals are within an outer portion of the uplink frequency band . 15 . A communication method for an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the method comprising : sending a request for a probing signal to a mobile device from a base station in the system ; and responding by the mobile device to the request by transmitting the probing signal with a code sequence modulated in the frequency domain , wherein : the probing signal is configured to overlap , in the time domain , with uplink signals transmitted over an uplink frequency band by other mobile devices in the system ; and the probing signal is configured to occupy a portion of spectrum in the uplink frequency band not designated for transmission of uplink control signals in the system . 16 . The method of claim 15 , wherein transmission power [FEATURE ID: 10] |
1 . Wireless transmission method [FEATURE ID: 1] , comprising [TRANSITIVE ID: 4] the step of : transmitting [TRANSITIVE ID: 5] data [FEATURE ID: 7] in frames [FEATURE ID: 7] according to a time divisional duplex ( TDD ) system [FEATURE ID: 1] , wherein frame comprises [TRANSITIVE ID: 4] a header slot ( HS ) and a plurality of traffic slots [FEATURE ID: 13] ( TS ) , wherein the header slot ( HS ) and the individual traffic slots ( TS ) have the same time duration , wherein the header slot ( HS ) occupies a single time slot [FEATURE ID: 3] , and wherein the header slot ( HS ) is subdivided into : a downlink channel ( DC ) for the transmission [FEATURE ID: 10] of synchronization data ( SYNCH ) and system data from a base station ( 1 ) to at least one mobile station [FEATURE ID: 2] ( 2 , 3 , 4 ) , and an uplink channel [FEATURE ID: 8] ( UC ) for the transmission of registration data [FEATURE ID: 13] ( RACH ) from at least one mobile station ( 3 ) to the base station ( 1 ) . 2 . Wireless transmission method according to claim [FEATURE ID: 11] 1 , characterized in that the downlink channel ( DC ) and the uplink channel ( UC ) of the header slot ( HS ) have the same time duration . 3 . Wireless transmission method according to claim 1 , characterized in that the downlink channel ( DC ) of the header slot ( HS ) comprises a synchronization channel ( SYNCH ) and at least one broadcast channel [FEATURE ID: 12] ( GBCCH , OBCCH ) for the transmission of cell [FEATURE ID: 1] and / or system data to all or selected mobile stations [FEATURE ID: 9] ( 2 , 3 , 4 ) . 4 . Wireless transmission method , comprising the step of : transmitting data in frames according to a time divisional duplex ( TDD ) system , wherein each frame comprises a header slot ( HS ) and a plurality of traffic slots ( TS ) , wherein the header slot ( HS ) and the individual traffic slots ( TS ) have the same time duration , wherein the header slot ( HS ) occupies a single time slot , wherein the header slot ( HS ) is subdivided into : a downlink channel ( DC ) for the transmission of synchronization data ( SYNCH ) and system data from a base station ( 1 ) to at least one mobile station ( 2 , 3 , 4 ) , and an uplink channel ( UC ) for the transmission of registration data ( RACH ) from at least one mobile station ( 3 ) to the base station ( 1 ) , wherein the downlink channel ( DC ) of the header slot ( HS ) comprises a synchronization channel ( SYNCH ) and at least one broadcast channel ( GBCCH , OBCCH ) for the transmission of cell and / or system data to all or selected mobile stations ( 2 , 3 , 4 ) , and wherein the synchronization channel ( SYNCH ) of the header slot ( HS ) comprises at least two identical repeated [TRANSITIVE ID: 1] symbols [FEATURE ID: 7] ( S 1 , S 2 ) . 5 . Wireless transmission method , comprising the step of : transmitting data in frames according to a time divisional duplex ( TDD ) system , wherein each frame comprises a header slot ( HS ) and a plurality of traffic slots ( TS ) , wherein the header slot ( HS ) and the individual traffic slots ( TS ) have the same time duration , wherein the header slot ( HS ) occupies a single time slot , wherein the header slot ( HS ) is subdivided into : a downlink channel ( DC ) for the transmission of synchronization data ( SYNCH ) and system data from a base station ( 1 ) to at least one mobile station ( 2 , 3 , 4 ) , and an uplink channel ( UC ) for the transmission of registration data ( RACH ) from at least one mobile station ( 3 ) to the base station ( 1 ) , wherein the downlink channel ( DC ) of the header slot ( HS ) comprises a synchronization channel ( SYNCH ) and at least one broadcast channel ( GBCCH , OBCCH ) for the transmission of cell and / or system data to all or selected mobile stations ( 2 , 3 , 4 ) , and wherein the at least one broadcast channel ( GBCCH , OBCCH ) of the header slot ( HS ) comprises at least two identical repeated symbols . 6 . Wireless transmission method according to claim 4 , characterized in that a repeated structure [FEATURE ID: 3] of the synchronization channel ( SYNCH ) and / or the broadcast channel ( GBCCH , OBCCH ) of the header slot ( HS ) is used for a frequency [FEATURE ID: 3] and / or time synchronization [FEATURE ID: 6] by means of a correlation technique [FEATURE ID: 1] ( 5 , 6 ) . 7 . Wireless transmission method , comprising the step of : transmitting data in frames according to a time divisional duplex ( TDD ) system , wherein each frame comprises a header slot ( HS ) and a plurality of traffic slots ( TS ) , wherein the header slot ( HS ) and the individual traffic slots ( TS ) have the same time duration , wherein the header slot ( HS ) occupies a single time slot , wherein the header slot ( HS ) is subdivided into : a downlink channel ( DC ) for the transmission of synchronization data ( SYNCH ) and system data from a base station ( 1 ) to at least one mobile station ( 2 , 3 , 4 ) , and an uplink channel ( UC ) for the transmission of registration data ( RACH ) from at least one mobile station ( 3 ) to the base station ( 1 ) , wherein the downlink channel ( DC ) of the header slot ( HS ) comprises a synchronization channel ( SYNCH ) and at least one broadcast channel ( GBCCH , OBCCH ) for the transmission of cell and / or system data to all or selected mobile stations ( 2 , 3 , 4 ) , wherein a general broadcast channel [FEATURE ID: 12] |
| Targeted Patent: Patent: US10771302B2 Filed: 2004-01-29 Issued: 2020-09-08 Patent Holder: (Original Assignee) Neo Wireless LLC (Current Assignee) Neo Wireless LLC Inventor(s): Xiaodong Li, Titus Lo, Kemin Li, Haiming Huang Title: Channel probing signal for a broadband communication system | Cross Reference / Shared Meaning between the Lines |
Charted Against: Patent: US20030081538A1 Filed: 2001-10-18 Issued: 2003-05-01 Patent Holder: (Original Assignee) Qualcomm Inc (Current Assignee) Qualcomm Inc Inventor(s): Jay Walton, John Ketchum, Steven Howard, Mark Wallace Title: Multiple-access hybrid OFDM-CDMA system |
| [FEATURE ID: 1] communication method, method, system, frequency domain, time domain, channel profile, subsequent transmission, transmission format, channel | transmission, transmitter, communication, signal, network, bandwidth, transceiver | [FEATURE ID: 1] CDMA system, method, wireless communication channel, scheme, communication channel, cyclic prefix |
| [FEATURE ID: 2] mobile device, spectrum, modulation, time period | transmission, time, symbol, sequence, preamble, channel, portion | [FEATURE ID: 2] data stream, frequency domain |
| [FEATURE ID: 3] communication system, request, base station, uplink frequency band | channel, transmission, cell, signal, sector, resource, uplink | [FEATURE ID: 3] access OFDM, particular modulation scheme |
| [TRANSITIVE ID: 4] comprising | having, wherein, comprises, compromising, including, involving, with | [TRANSITIVE ID: 4] comprising |
| [TRANSITIVE ID: 5] receiving, transmission, transmission power | reception, receipt, signaling, processing, sending, delivery, emission | [TRANSITIVE ID: 5] transmission, transmitting |
| [FEATURE ID: 6] signal | sequence, channel, code, packet, burst, preamble, carrier | [FEATURE ID: 6] multiple, data symbol stream, particular transformation, particular gain, OFDM symbol, transmission symbol, cover code, pilot |
| [TRANSITIVE ID: 7] transmitting, uplink control signals, coding, uplink data signals | transmission, data, communication, information, symbols, pilots, uci | [TRANSITIVE ID: 7] processing data |
| [FEATURE ID: 8] response | connection, comparison, conformity, parallel, according, order, conformance | [FEATURE ID: 8] accordance |
| [FEATURE ID: 9] code sequence | data, spread, bandwidth, shape, transmission, frequency, phase | [FEATURE ID: 9] spread data, length |
| [TRANSITIVE ID: 10] modulated, configured, transmitted, designated, available | provided, specified, assigned, used, generated, defined, orthogonal | [TRANSITIVE ID: 10] selected, available, pseudo-orthogonal codes |
| [FEATURE ID: 11] uplink signals, other mobile devices, subcarriers | signals, tones, samples, sequences, values, carriers, frames | [FEATURE ID: 11] data symbols, codes, OFDM symbols, transmission symbols, bits, modulation symbols, orthogonal codes |
| [FEATURE ID: 12] portion | subset, plurality, range, spectrum, block | [FEATURE ID: 12] set |
| [FEATURE ID: 13] claim | requirement, step, claim of, the claim, paragraph, item, aspect | [FEATURE ID: 13] claim |
| [FEATURE ID: 14] pilot pattern | channel, data, code, spreading | [FEATURE ID: 14] particular |
| [FEATURE ID: 15] estimating | computing, producing, receiving, generating | [FEATURE ID: 15] coding |
| 1 . A communication method [FEATURE ID: 1] for a mobile device [FEATURE ID: 2] in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system [FEATURE ID: 3] , the method [FEATURE ID: 1] comprising [TRANSITIVE ID: 4] : receiving [TRANSITIVE ID: 5] a request [FEATURE ID: 3] for a probing signal [FEATURE ID: 6] from a base station [FEATURE ID: 3] in the system [FEATURE ID: 1] ; and transmitting [TRANSITIVE ID: 7] , in response [FEATURE ID: 8] to the received request , the probing signal with a code sequence [FEATURE ID: 9] modulated [TRANSITIVE ID: 10] in the frequency domain [FEATURE ID: 1] , wherein : the probing signal is configured [TRANSITIVE ID: 10] to overlap , in the time domain [FEATURE ID: 1] , with uplink signals [FEATURE ID: 11] transmitted [TRANSITIVE ID: 10] over an uplink frequency band [FEATURE ID: 3] by other mobile devices [FEATURE ID: 11] in the system ; and the probing signal is configured to occupy a portion [FEATURE ID: 12] of spectrum [FEATURE ID: 2] in the uplink frequency band not designated [TRANSITIVE ID: 10] for transmission [FEATURE ID: 5] of uplink control signals [FEATURE ID: 7] in the system . 2 . The method of claim [FEATURE ID: 13] 1 , wherein the probing signal provides information for the base station to estimate a channel profile [FEATURE ID: 1] in the frequency domain . 3 . The method of claim 2 , wherein the mobile device receives a subsequent transmission [FEATURE ID: 1] from the base station that has been beamformed using the estimated channel profile . 4 . The method of claim 1 , wherein the probing signal provides information for the base station to determine a transmission format [FEATURE ID: 1] for a subsequent transmission . 5 . The method of claim 4 , wherein the transmission format comprises a modulation [FEATURE ID: 2] / coding [FEATURE ID: 7] or pilot pattern [FEATURE ID: 14] . 6 . The method of claim 1 , wherein the portion of spectrum is available [FEATURE ID: 10] for transmission of uplink data signals [FEATURE ID: 7] by other mobile devices in the system during a time period [FEATURE ID: 2] when the portion of the spectrum is not occupied by the probing signal . 7 . The method of claim 1 , wherein the portion of spectrum is within a center portion of the uplink frequency band and subcarriers [FEATURE ID: 11] for the transmission of uplink control signals are within an outer portion of the uplink frequency band . 8 . A communication method for a base station in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the method comprising : transmitting a request for a probing signal to a mobile device in the system ; and receiving the probing signal from the mobile device , wherein : the probing signal contains a code sequence modulated in the frequency domain ; the probing signal overlaps , in the time domain , with uplink signals transmitted over an uplink frequency band by other mobile devices in the system ; and the probing signal occupies a portion of spectrum in the uplink frequency band not designated for transmission of uplink control signals in the system . 9 . The method of claim 8 , further comprising estimating [FEATURE ID: 15] , based on the received probing signal , a channel profile in the frequency domain . 10 . The method of claim 9 , further comprising using the channel profile to determine a transmission format for a subsequent transmission over the channel [FEATURE ID: 1] . 11 . The method of claim 10 , wherein the transmission format comprises a modulation / coding or pilot pattern . 12 . The method of claim 9 , further comprising using the channel profile for beamforming in a subsequent transmission to the mobile device . 13 . The method of claim 8 , wherein the portion of spectrum is available for transmission of uplink data signals by other mobile devices in the system during a time period when the portion of the spectrum is not occupied by the probing signal . 14 . The method of claim 8 , wherein the portion of spectrum is within a center portion of the uplink frequency band and subcarriers for the transmission of uplink control signals are within an outer portion of the uplink frequency band . 15 . A communication method for an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the method comprising : sending a request for a probing signal to a mobile device from a base station in the system ; and responding by the mobile device to the request by transmitting the probing signal with a code sequence modulated in the frequency domain , wherein : the probing signal is configured to overlap , in the time domain , with uplink signals transmitted over an uplink frequency band by other mobile devices in the system ; and the probing signal is configured to occupy a portion of spectrum in the uplink frequency band not designated for transmission of uplink control signals in the system . 16 . The method of claim 15 , wherein transmission power [FEATURE ID: 5] |
1 . In a multiple [FEATURE ID: 6] - access OFDM [FEATURE ID: 3] - CDMA system [FEATURE ID: 1] , a method [FEATURE ID: 1] for processing data [FEATURE ID: 7] for transmission [FEATURE ID: 5] over a wireless communication channel [FEATURE ID: 1] , comprising [TRANSITIVE ID: 4] : coding [TRANSITIVE ID: 15] a data stream [FEATURE ID: 2] in accordance [FEATURE ID: 8] with a particular [FEATURE ID: 14] coding scheme [FEATURE ID: 1] to provide a stream of data symbols [FEATURE ID: 11] ; spreading the data symbol stream [FEATURE ID: 6] in a frequency domain [FEATURE ID: 2] with one or more spreading codes [FEATURE ID: 11] to provide spread data [FEATURE ID: 9] , wherein the one or more spreading codes are selected [TRANSITIVE ID: 10] from a set [FEATURE ID: 12] of available [FEATURE ID: 10] spreading codes and assigned to the data stream ; transforming the spread data in accordance with a particular transformation [FEATURE ID: 6] to provide a stream of OFDM symbols [FEATURE ID: 11] ; scaling the stream of OFDM symbols in accordance with a particular gain [FEATURE ID: 6] selected for the data stream ; and transmitting [TRANSITIVE ID: 5] the scaled OFDM symbols over the communication channel [FEATURE ID: 1] . 2 . The method of claim [FEATURE ID: 13] 1 , further comprising : appending a cyclic prefix [FEATURE ID: 1] to each OFDM symbol [FEATURE ID: 6] to provide a corresponding transmission symbol [FEATURE ID: 6] , wherein transmission symbols [FEATURE ID: 11] are scaled and transmitted over the communication channel . 3 . The method of claim 1 , further comprising : covering the scaled OFDM symbols with a cover code [FEATURE ID: 6] . 4 . The method of claim 3 , wherein the cover code has a length [FEATURE ID: 9] that is multiple integer times a length of the OFDM symbol . 5 . The method of claim 3 , wherein the cover code has a length that is multiple integer times a length of a transmission symbol formed by appending a cyclic prefix to an OFDM symbol . 6 . The method of claim 1 , wherein the data symbol stream comprises coded bits [FEATURE ID: 11] . 7 . The method of claim 1 , wherein the data symbol stream comprises modulation symbols [FEATURE ID: 11] derived based on a particular modulation scheme [FEATURE ID: 3] . 8 . The method of claim 1 , further comprising : transmitting a pilot [FEATURE ID: 6] along with the scaled OFDM symbols over the communication channel . 9 . The method of claim 1 , wherein the spreading codes are Walsh codes . 10 . The method of claim 1 , wherein the spreading codes are orthogonal codes [FEATURE ID: 11] . 11 . The method of claim 1 , wherein the spreading codes are pseudo-orthogonal codes [FEATURE ID: 10] |
| Targeted Patent: Patent: US10771302B2 Filed: 2004-01-29 Issued: 2020-09-08 Patent Holder: (Original Assignee) Neo Wireless LLC (Current Assignee) Neo Wireless LLC Inventor(s): Xiaodong Li, Titus Lo, Kemin Li, Haiming Huang Title: Channel probing signal for a broadband communication system | Cross Reference / Shared Meaning between the Lines |
Charted Against: Patent: US20030072255A1 Filed: 2001-10-17 Issued: 2003-04-17 Patent Holder: (Original Assignee) Nortel Networks Ltd (Current Assignee) Apple Inc Inventor(s): Jianglei Ma, Ming Jia, Peiying Zhu, Wen Tong Title: System access and synchronization methods for MIMO OFDM communications systems and physical layer packet and preamble design |
| [FEATURE ID: 1] communication method, mobile device, method, request, base station, frequency domain, time domain, channel profile, subsequent transmission, transmission format, modulation, coding, pilot pattern, uplink data signals, channel | transmission, system, signal, scheme, frequency, bandwidth, symbol | [FEATURE ID: 1] OFDM transmitter, header symbol format, header OFDM symbol, antenna, transmitter |
| [FEATURE ID: 2] communication system | channel, signal, field, frame, symbol, structure, scheme | [FEATURE ID: 2] preamble, complex sequence |
| [TRANSITIVE ID: 3] receiving, transmitting | sending, communicating, providing, processing, generating, decoding, launching | [TRANSITIVE ID: 3] transmitting |
| [FEATURE ID: 4] signal, uplink frequency band | channel, carrier, tone, signaling, code, message, rach | [FEATURE ID: 4] dedicated pilot channel |
| [FEATURE ID: 5] code sequence | payload, symbol, preamble, channel, pilot, data, prefix | [FEATURE ID: 5] header symbols, header OFDM symbols, header OFDM symbol format, BTS specific, pilot channel |
| [TRANSITIVE ID: 6] modulated, transmitted, power control | defined, distributed, used, known, unique, generated, specified | [TRANSITIVE ID: 6] divided, separated, assigned, multiplexed, different |
| [TRANSITIVE ID: 7] configured, designated, available | intended, provided, assigned, specified, suitable, designed, scheduled | [TRANSITIVE ID: 7] adapted |
| [FEATURE ID: 8] uplink signals, other mobile devices, uplink control signals, subcarriers | signals, channels, carriers, transmissions, symbols, frames, resources | [FEATURE ID: 8] sub-carriers, antennas, common synchronization channel, broadcasting sub-carriers, identical OFDM symbols, pilot channel sub-carriers |
| [TRANSITIVE ID: 9] occupy | include, use, transmit, represent | [TRANSITIVE ID: 9] contain |
| [FEATURE ID: 10] portion | set, range, subset, plurality, number, collection, block | [FEATURE ID: 10] non-contiguous set, respective set, different set |
| [FEATURE ID: 11] spectrum | frequencies, space, bandwidth, time | [FEATURE ID: 11] N sub-carriers |
| [FEATURE ID: 12] transmission | demodulation, reuse, detection, reception | [FEATURE ID: 12] efficient BTS identification |
| [FEATURE ID: 13] claim | item, paragraph, embodiment, clause, aspect, cl claim, clam | [FEATURE ID: 13] claim, claims |
| [FEATURE ID: 14] time period | subframe, portion, duration, symbol, period | [FEATURE ID: 14] prefix |
| [FEATURE ID: 15] center portion | portion, remainder, boundary, part | [FEATURE ID: 15] cyclic extension |
| 1 . A communication method [FEATURE ID: 1] for a mobile device [FEATURE ID: 1] in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system [FEATURE ID: 2] , the method [FEATURE ID: 1] comprising : receiving [TRANSITIVE ID: 3] a request [FEATURE ID: 1] for a probing signal [FEATURE ID: 4] from a base station [FEATURE ID: 1] in the system ; and transmitting [TRANSITIVE ID: 3] , in response to the received request , the probing signal with a code sequence [FEATURE ID: 5] modulated [TRANSITIVE ID: 6] in the frequency domain [FEATURE ID: 1] , wherein : the probing signal is configured [TRANSITIVE ID: 7] to overlap , in the time domain [FEATURE ID: 1] , with uplink signals [FEATURE ID: 8] transmitted [TRANSITIVE ID: 6] over an uplink frequency band [FEATURE ID: 4] by other mobile devices [FEATURE ID: 8] in the system ; and the probing signal is configured to occupy [TRANSITIVE ID: 9] a portion [FEATURE ID: 10] of spectrum [FEATURE ID: 11] in the uplink frequency band not designated [TRANSITIVE ID: 7] for transmission [FEATURE ID: 12] of uplink control signals [FEATURE ID: 8] in the system . 2 . The method of claim [FEATURE ID: 13] 1 , wherein the probing signal provides information for the base station to estimate a channel profile [FEATURE ID: 1] in the frequency domain . 3 . The method of claim 2 , wherein the mobile device receives a subsequent transmission [FEATURE ID: 1] from the base station that has been beamformed using the estimated channel profile . 4 . The method of claim 1 , wherein the probing signal provides information for the base station to determine a transmission format [FEATURE ID: 1] for a subsequent transmission . 5 . The method of claim 4 , wherein the transmission format comprises a modulation [FEATURE ID: 1] / coding [FEATURE ID: 1] or pilot pattern [FEATURE ID: 1] . 6 . The method of claim 1 , wherein the portion of spectrum is available [FEATURE ID: 7] for transmission of uplink data signals [FEATURE ID: 1] by other mobile devices in the system during a time period [FEATURE ID: 14] when the portion of the spectrum is not occupied by the probing signal . 7 . The method of claim 1 , wherein the portion of spectrum is within a center portion [FEATURE ID: 15] of the uplink frequency band and subcarriers [FEATURE ID: 8] for the transmission of uplink control signals are within an outer portion of the uplink frequency band . 8 . A communication method for a base station in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the method comprising : transmitting a request for a probing signal to a mobile device in the system ; and receiving the probing signal from the mobile device , wherein : the probing signal contains a code sequence modulated in the frequency domain ; the probing signal overlaps , in the time domain , with uplink signals transmitted over an uplink frequency band by other mobile devices in the system ; and the probing signal occupies a portion of spectrum in the uplink frequency band not designated for transmission of uplink control signals in the system . 9 . The method of claim 8 , further comprising estimating , based on the received probing signal , a channel profile in the frequency domain . 10 . The method of claim 9 , further comprising using the channel profile to determine a transmission format for a subsequent transmission over the channel [FEATURE ID: 1] . 11 . The method of claim 10 , wherein the transmission format comprises a modulation / coding or pilot pattern . 12 . The method of claim 9 , further comprising using the channel profile for beamforming in a subsequent transmission to the mobile device . 13 . The method of claim 8 , wherein the portion of spectrum is available for transmission of uplink data signals by other mobile devices in the system during a time period when the portion of the spectrum is not occupied by the probing signal . 14 . The method of claim 8 , wherein the portion of spectrum is within a center portion of the uplink frequency band and subcarriers for the transmission of uplink control signals are within an outer portion of the uplink frequency band . 15 . A communication method for an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the method comprising : sending a request for a probing signal to a mobile device from a base station in the system ; and responding by the mobile device to the request by transmitting the probing signal with a code sequence modulated in the frequency domain , wherein : the probing signal is configured to overlap , in the time domain , with uplink signals transmitted over an uplink frequency band by other mobile devices in the system ; and the probing signal is configured to occupy a portion of spectrum in the uplink frequency band not designated for transmission of uplink control signals in the system . 16 . The method of claim 15 , wherein transmission power of the probing signal is under power control [FEATURE ID: 6] |
1 . A MIMO - OFDM transmitter [FEATURE ID: 1] adapted [TRANSITIVE ID: 7] to transmit a header symbol format [FEATURE ID: 1] in which sub-carriers [FEATURE ID: 8] of a header OFDM symbol [FEATURE ID: 1] are divided [TRANSITIVE ID: 6] into a non-contiguous set [FEATURE ID: 10] of sub-carriers for each of a plurality of antennas [FEATURE ID: 8] , with each antenna [FEATURE ID: 1] transmitting [TRANSITIVE ID: 3] the header OFDM symbol only on the respective set [FEATURE ID: 10] of sub-carriers . 2 . A transmitter [FEATURE ID: 1] according to claim [FEATURE ID: 13] 1 wherein there are N antennas and a different set [FEATURE ID: 10] of sub-carriers separated [TRANSITIVE ID: 6] by N sub-carriers [FEATURE ID: 11] is assigned [TRANSITIVE ID: 6] to each of the plurality of antennas . 3 . A transmitter according to claim 1 wherein the header symbols [FEATURE ID: 5] contain [TRANSITIVE ID: 9] a multiplexed [TRANSITIVE ID: 6] dedicated pilot channel [FEATURE ID: 4] on dedicated pilot channel sub-carriers and common synchronization channel [FEATURE ID: 8] on common synchronization channel sub-carriers for each of the plurality of antennas . 4 . A transmitter according to claim 3 wherein the header OFDM symbols [FEATURE ID: 5] further contain multiplexed broadcasting sub-carriers [FEATURE ID: 8] for each of the plurality of antennas . 5 . A transmitter according to claim 1 , adapted to transmit a preamble [FEATURE ID: 2] having a prefix [FEATURE ID: 14] , followed by two identical OFDM symbols [FEATURE ID: 8] having said header OFDM symbol format [FEATURE ID: 5] . 6 . A transmitter according to claim 5 wherein the prefix is a cyclic extension [FEATURE ID: 15] of the two identical OFDM symbols . 7 . A transmitter according to claim 3 wherein the pilot channel sub-carriers [FEATURE ID: 8] have a BTS specific [FEATURE ID: 5] mapped complex sequence [FEATURE ID: 2] allowing efficient BTS identification [FEATURE ID: 12] . 8 . A transmitter according to any one of claims [FEATURE ID: 13] 3 wherein the common synchronization channel is designed for fast and accurate initial acquisition . 9 . A transmitter according to claim 3 wherein the common synchronization channel is used for course synchronization and fine synchronization and the pilot channel [FEATURE ID: 5] is used for fine synchronization . 10 . A transmitter according to claim 3 wherein the common synchronization channel is used to transmit a complex sequence which is different [FEATURE ID: 6] |
| Targeted Patent: Patent: US10771302B2 Filed: 2004-01-29 Issued: 2020-09-08 Patent Holder: (Original Assignee) Neo Wireless LLC (Current Assignee) Neo Wireless LLC Inventor(s): Xiaodong Li, Titus Lo, Kemin Li, Haiming Huang Title: Channel probing signal for a broadband communication system | Cross Reference / Shared Meaning between the Lines |
Charted Against: Patent: US6515960B1 Filed: 1997-08-27 Issued: 2003-02-04 Patent Holder: (Original Assignee) Sony Corp (Current Assignee) Sony Corp Inventor(s): Takashi Usui, Hisaki Hiraiwa, Takehiro Sugita Title: Radio communication system |
| [FEATURE ID: 1] communication method, method, base station, system, frequency domain, subsequent transmission, transmission format, channel | transmission, communication, transmitter, network, frame, control, station | [FEATURE ID: 1] radio communication system, radio communication control terminal, receiving, synchronization |
| [FEATURE ID: 2] mobile device, uplink data signals | radio, communication, transmission, wireless, data, synchronization, access | [FEATURE ID: 2] data communication, radio communication, TDMA time division multiple access |
| [FEATURE ID: 3] OFDM | of, fm, sf, ff, od | [FEATURE ID: 3] OFDM |
| [FEATURE ID: 4] communication system, spectrum, channel profile, pilot pattern, time period | channel, code, frame, time, bandwidth, transmission, packet | [FEATURE ID: 4] data, frame structure, sequence code |
| [TRANSITIVE ID: 5] comprising | wherein, includes, with, providing, of, having, involving | [TRANSITIVE ID: 5] comprising |
| [TRANSITIVE ID: 6] receiving, estimating | obtaining, acquiring, transmitting, determining, providing, processing, requesting | [TRANSITIVE ID: 6] controlling, performing, code generating, generating, detecting |
| [FEATURE ID: 7] signal, modulation, coding | sequence, code, pattern, symbol, preamble, rate, packet | [FEATURE ID: 7] code sequence, length packet, Gold code |
| [TRANSITIVE ID: 8] transmitting | supplying, generating, transmission, sending, providing | [TRANSITIVE ID: 8] radio communication control terminal transmits |
| [FEATURE ID: 9] code sequence, portion, center portion | channel, frequency, period, window, range, bandwidth, timing | [FEATURE ID: 9] number, timer means, transmission timing |
| [FEATURE ID: 10] time domain | period, time, subframe, cycle, frequency, slot, sequence | [FEATURE ID: 10] timing, symbol |
| [FEATURE ID: 11] uplink signals, subcarriers | signals, carriers, slots, blocks, cells, periods, bits | [FEATURE ID: 11] symbols, frames, sub-carriers |
| [FEATURE ID: 12] other mobile devices, uplink control signals | users, channels, systems, nodes, devices, signals, transmitters | [FEATURE ID: 12] radio communication terminals |
| [FEATURE ID: 13] transmission | reception, control, modulation, transfer, sending, the, processing | [FEATURE ID: 13] data transmission, second transmission |
| [FEATURE ID: 14] claim | requirement, clause, claim of, para claim, paragraph, embodiment, aspect | [FEATURE ID: 14] claim |
| [FEATURE ID: 15] transmission power | transmission, timing, reception, communication, detection | [FEATURE ID: 15] synchronization acquisition |
| 1 . A communication method [FEATURE ID: 1] for a mobile device [FEATURE ID: 2] in an Orthogonal Frequency Division Multiplexing ( OFDM [FEATURE ID: 3] ) communication system [FEATURE ID: 4] , the method [FEATURE ID: 1] comprising [TRANSITIVE ID: 5] : receiving [TRANSITIVE ID: 6] a request for a probing signal [FEATURE ID: 7] from a base station [FEATURE ID: 1] in the system [FEATURE ID: 1] ; and transmitting [TRANSITIVE ID: 8] , in response to the received request , the probing signal with a code sequence [FEATURE ID: 9] modulated in the frequency domain [FEATURE ID: 1] , wherein : the probing signal is configured to overlap , in the time domain [FEATURE ID: 10] , with uplink signals [FEATURE ID: 11] transmitted over an uplink frequency band by other mobile devices [FEATURE ID: 12] in the system ; and the probing signal is configured to occupy a portion [FEATURE ID: 9] of spectrum [FEATURE ID: 4] in the uplink frequency band not designated for transmission [FEATURE ID: 13] of uplink control signals [FEATURE ID: 12] in the system . 2 . The method of claim [FEATURE ID: 14] 1 , wherein the probing signal provides information for the base station to estimate a channel profile [FEATURE ID: 4] in the frequency domain . 3 . The method of claim 2 , wherein the mobile device receives a subsequent transmission [FEATURE ID: 1] from the base station that has been beamformed using the estimated channel profile . 4 . The method of claim 1 , wherein the probing signal provides information for the base station to determine a transmission format [FEATURE ID: 1] for a subsequent transmission . 5 . The method of claim 4 , wherein the transmission format comprises a modulation [FEATURE ID: 7] / coding [FEATURE ID: 7] or pilot pattern [FEATURE ID: 4] . 6 . The method of claim 1 , wherein the portion of spectrum is available for transmission of uplink data signals [FEATURE ID: 2] by other mobile devices in the system during a time period [FEATURE ID: 4] when the portion of the spectrum is not occupied by the probing signal . 7 . The method of claim 1 , wherein the portion of spectrum is within a center portion [FEATURE ID: 9] of the uplink frequency band and subcarriers [FEATURE ID: 11] for the transmission of uplink control signals are within an outer portion of the uplink frequency band . 8 . A communication method for a base station in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the method comprising : transmitting a request for a probing signal to a mobile device in the system ; and receiving the probing signal from the mobile device , wherein : the probing signal contains a code sequence modulated in the frequency domain ; the probing signal overlaps , in the time domain , with uplink signals transmitted over an uplink frequency band by other mobile devices in the system ; and the probing signal occupies a portion of spectrum in the uplink frequency band not designated for transmission of uplink control signals in the system . 9 . The method of claim 8 , further comprising estimating [FEATURE ID: 6] , based on the received probing signal , a channel profile in the frequency domain . 10 . The method of claim 9 , further comprising using the channel profile to determine a transmission format for a subsequent transmission over the channel [FEATURE ID: 1] . 11 . The method of claim 10 , wherein the transmission format comprises a modulation / coding or pilot pattern . 12 . The method of claim 9 , further comprising using the channel profile for beamforming in a subsequent transmission to the mobile device . 13 . The method of claim 8 , wherein the portion of spectrum is available for transmission of uplink data signals by other mobile devices in the system during a time period when the portion of the spectrum is not occupied by the probing signal . 14 . The method of claim 8 , wherein the portion of spectrum is within a center portion of the uplink frequency band and subcarriers for the transmission of uplink control signals are within an outer portion of the uplink frequency band . 15 . A communication method for an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the method comprising : sending a request for a probing signal to a mobile device from a base station in the system ; and responding by the mobile device to the request by transmitting the probing signal with a code sequence modulated in the frequency domain , wherein : the probing signal is configured to overlap , in the time domain , with uplink signals transmitted over an uplink frequency band by other mobile devices in the system ; and the probing signal is configured to occupy a portion of spectrum in the uplink frequency band not designated for transmission of uplink control signals in the system . 16 . The method of claim 15 , wherein transmission power [FEATURE ID: 15] |
1 . A radio communication system [FEATURE ID: 1] comprising [TRANSITIVE ID: 5] : a plurality of radio communication terminals [FEATURE ID: 12] for data communication [FEATURE ID: 2] ; and a radio communication control terminal [FEATURE ID: 1] for controlling [TRANSITIVE ID: 6] radio communication [FEATURE ID: 2] , wherein said radio communication control terminal includes first transmission means for performing [TRANSITIVE ID: 6] data transmission [FEATURE ID: 13] by orthogonal frequency division multiplexing ( OFDM [FEATURE ID: 3] ) , first receiving [TRANSITIVE ID: 1] means for receiving said data transmission by said OFDM , and synchronization [FEATURE ID: 1] - code generating [FEATURE ID: 6] means for generating [TRANSITIVE ID: 6] a code sequence [FEATURE ID: 7] for synchronization acquisition [FEATURE ID: 15] , and wherein each of said plurality of radio communication terminals includes second transmission [FEATURE ID: 13] means for performing said data transmission by said OFDM , second receiving means for receiving said data transmission by said OFDM , synchronization - code detecting [TRANSITIVE ID: 6] means for detecting said code sequence for said synchronization acquisition , and timer means set by said synchronization - code detecting means , wherein data [FEATURE ID: 4] is modulated by said OFDM and multiplexed by TDMA time division multiple access [FEATURE ID: 2] ( TDMA ) with a frame structure [FEATURE ID: 4] having a specified number [FEATURE ID: 9] of symbols [FEATURE ID: 11] between each of said plurality of radio communication terminals and said radio communication control terminal , said radio communication control terminal transmits [FEATURE ID: 8] said code sequence for said synchronization acquisition to said plurality of radio communication terminals in each of a plurality of frames [FEATURE ID: 11] , and each of said plurality of radio communication terminals receives said code sequence for said synchronization acquisition , compares said code sequence to a predetermined code , sets said timer means [FEATURE ID: 9] according to a receiving timing [FEATURE ID: 10] of said code sequence for said synchronization acquisition , and sets a transmission timing [FEATURE ID: 9] and said receiving timing with said timer means used as a reference . 2 . The radio communication system as set forth in claim [FEATURE ID: 14] 1 , wherein said code sequence for said synchronization acquisition corresponds to one symbol [FEATURE ID: 10] of said specified number of symbols in said OFDM . 3 . The radio communication system as set forth in claim 1 , wherein said code sequence for said synchronization acquisition is a variable - length packet [FEATURE ID: 7] . 4 . The radio communication system as set forth in claim 1 , wherein said code sequence for said synchronization acquisition is an M - sequence code [FEATURE ID: 4] . 5 . The radio communication system as set forth in claim 1 , wherein said code sequence for said synchronization acquisition is a Gold code [FEATURE ID: 7] . 6 . The radio communication system as set forth in claim 1 , wherein each of a plurality of sub-carriers [FEATURE ID: 11] |
| Targeted Patent: Patent: US10771302B2 Filed: 2004-01-29 Issued: 2020-09-08 Patent Holder: (Original Assignee) Neo Wireless LLC (Current Assignee) Neo Wireless LLC Inventor(s): Xiaodong Li, Titus Lo, Kemin Li, Haiming Huang Title: Channel probing signal for a broadband communication system | Cross Reference / Shared Meaning between the Lines |
Charted Against: Patent: US20020176485A1 Filed: 2001-04-03 Issued: 2002-11-28 Patent Holder: (Original Assignee) Nortel Networks Ltd (Current Assignee) Nortel Networks Ltd Inventor(s): John Hudson Title: Multi-cast communication system and method of estimating channel impulse responses therein |
| [FEATURE ID: 1] communication method, method, system, time domain, transmission format, modulation, coding, pilot pattern, time period, channel | transmission, transmitter, transceiver, signal, scheme, frequency, cell | [FEATURE ID: 1] method, communication device, signal sequence, burst, single element transmitter, frequency domain |
| [FEATURE ID: 2] mobile device | user, transmission, signal, transceiver, network | [FEATURE ID: 2] channel |
| [FEATURE ID: 3] communication system, portion, channel profile, subsequent transmission | spectrum, transmission, signal, channel, component, frame, waveform | [FEATURE ID: 3] replica, composite frequency response |
| [TRANSITIVE ID: 4] comprising | providing, having, including, involving, with, of, performing | [TRANSITIVE ID: 4] comprising, being |
| [TRANSITIVE ID: 5] receiving, estimating | obtaining, generating, computing, acquiring, processing, identifying, providing | [TRANSITIVE ID: 5] determining, performing |
| [FEATURE ID: 6] signal, center portion | channel, slot, tone, code, gap, portion, window | [FEATURE ID: 6] cyclic prefix, carrier |
| [FEATURE ID: 7] base station | device, network, point, processor, sector, station | [FEATURE ID: 7] antenna |
| [TRANSITIVE ID: 8] transmitting | form, provide, receive, providing | [TRANSITIVE ID: 8] generate |
| [TRANSITIVE ID: 9] received | first, receive, detected, reception, receiving, transmitted, signal | [TRANSITIVE ID: 9] received |
| [FEATURE ID: 10] code sequence | channel, waveform, preamble, transmission, phase, sequence, spectrum | [FEATURE ID: 10] channel impulse response, multiple training bursts |
| [FEATURE ID: 11] frequency domain | response, symbol, frequency, preamble, domain, data, pilot | [FEATURE ID: 11] training sequence y n, time domain |
| [TRANSITIVE ID: 12] configured, designated, available | provided, selected, intended, specified, used, assigned, designed | [TRANSITIVE ID: 12] arranged |
| [FEATURE ID: 13] uplink signals, uplink data signals | samples, pilots, information, tones, frames, pulses, bursts | [FEATURE ID: 13] training sequence frequency bins, training sequence bursts, training sequences |
| [FEATURE ID: 14] other mobile devices, subcarriers | signals, components, transmitters, cells, systems, sites, beams | [FEATURE ID: 14] channels, elements, multiple elements, matrix operations, stations |
| [FEATURE ID: 15] uplink control signals | signals, data, interference, channels | [FEATURE ID: 15] channel impulse response H |
| [FEATURE ID: 16] claim | requirement, clause, para claim, the claim, paragraph, solution, embodiment | [FEATURE ID: 16] claim |
| [FEATURE ID: 17] information | conditions, knowledge, measurements, signals | [FEATURE ID: 17] channel impulse responses |
| 1 . A communication method [FEATURE ID: 1] for a mobile device [FEATURE ID: 2] in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system [FEATURE ID: 3] , the method [FEATURE ID: 1] comprising [TRANSITIVE ID: 4] : receiving [TRANSITIVE ID: 5] a request for a probing signal [FEATURE ID: 6] from a base station [FEATURE ID: 7] in the system [FEATURE ID: 1] ; and transmitting [TRANSITIVE ID: 8] , in response to the received [TRANSITIVE ID: 9] request , the probing signal with a code sequence [FEATURE ID: 10] modulated in the frequency domain [FEATURE ID: 11] , wherein : the probing signal is configured [TRANSITIVE ID: 12] to overlap , in the time domain [FEATURE ID: 1] , with uplink signals [FEATURE ID: 13] transmitted over an uplink frequency band by other mobile devices [FEATURE ID: 14] in the system ; and the probing signal is configured to occupy a portion [FEATURE ID: 3] of spectrum in the uplink frequency band not designated [TRANSITIVE ID: 12] for transmission of uplink control signals [FEATURE ID: 15] in the system . 2 . The method of claim [FEATURE ID: 16] 1 , wherein the probing signal provides information [FEATURE ID: 17] for the base station to estimate a channel profile [FEATURE ID: 3] in the frequency domain . 3 . The method of claim 2 , wherein the mobile device receives a subsequent transmission [FEATURE ID: 3] from the base station that has been beamformed using the estimated channel profile . 4 . The method of claim 1 , wherein the probing signal provides information for the base station to determine a transmission format [FEATURE ID: 1] for a subsequent transmission . 5 . The method of claim 4 , wherein the transmission format comprises a modulation [FEATURE ID: 1] / coding [FEATURE ID: 1] or pilot pattern [FEATURE ID: 1] . 6 . The method of claim 1 , wherein the portion of spectrum is available [FEATURE ID: 12] for transmission of uplink data signals [FEATURE ID: 13] by other mobile devices in the system during a time period [FEATURE ID: 1] when the portion of the spectrum is not occupied by the probing signal . 7 . The method of claim 1 , wherein the portion of spectrum is within a center portion [FEATURE ID: 6] of the uplink frequency band and subcarriers [FEATURE ID: 14] for the transmission of uplink control signals are within an outer portion of the uplink frequency band . 8 . A communication method for a base station in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the method comprising : transmitting a request for a probing signal to a mobile device in the system ; and receiving the probing signal from the mobile device , wherein : the probing signal contains a code sequence modulated in the frequency domain ; the probing signal overlaps , in the time domain , with uplink signals transmitted over an uplink frequency band by other mobile devices in the system ; and the probing signal occupies a portion of spectrum in the uplink frequency band not designated for transmission of uplink control signals in the system . 9 . The method of claim 8 , further comprising estimating [FEATURE ID: 5] , based on the received probing signal , a channel profile in the frequency domain . 10 . The method of claim 9 , further comprising using the channel profile to determine a transmission format for a subsequent transmission over the channel [FEATURE ID: 1] |
1 . A method [FEATURE ID: 1] of determining [TRANSITIVE ID: 5] channel impulse responses [FEATURE ID: 17] of a plurality of channels [FEATURE ID: 14] to a communication device [FEATURE ID: 1] , the method comprising [TRANSITIVE ID: 4] : performing [TRANSITIVE ID: 5] transform operations on both a replica [FEATURE ID: 3] of a signal sequence [FEATURE ID: 1] s n and a received [TRANSITIVE ID: 9] training sequence y n [FEATURE ID: 11] received by the communication device in at least one burst [FEATURE ID: 1] , the received training sequence y n being [TRANSITIVE ID: 4] the signal sequence as received through a channel [FEATURE ID: 2] , the transform operations arranged [TRANSITIVE ID: 12] to generate [TRANSITIVE ID: 8] a multiplicity of signal sequence frequency bins and a multiplicity of training sequence frequency bins [FEATURE ID: 13] ; performing point - by - point operations between corresponding signal sequence frequency bins and training sequence frequency bins ; and concatenating the point - by - point operations associated with the channel to provide a composite frequency response [FEATURE ID: 3] for the channel , the composite frequency response allowing , in the time domain [FEATURE ID: 11] , generation of the channel impulse response [FEATURE ID: 10] for the channel . 2 . The method according to claim [FEATURE ID: 16] 1 , further comprising : separating training sequence bursts [FEATURE ID: 13] emanating from a single element transmitter [FEATURE ID: 1] by one of a cyclic prefix [FEATURE ID: 6] and a blank ( zero ) carrier [FEATURE ID: 6] . 3 . The method according to claim 1 , wherein multiple Steiner codes are transmitted as training sequences [FEATURE ID: 13] , the multiple Steiner codes sent from multiple transmit elements [FEATURE ID: 14] in multiple training bursts [FEATURE ID: 10] . 4 . The method according to claim 3 , wherein the multiple Steiner codes are transmitted from multiple elements [FEATURE ID: 14] of a base station transmit antenna [FEATURE ID: 7] . 5 . The method according to claim 1 , further comprising using a set of matrix operations [FEATURE ID: 14] in the frequency domain [FEATURE ID: 1] to resolve channels to the communication device from multiple transmitting stations [FEATURE ID: 14] , the matrix operations providing solvable linear equations for the channel impulse response H [FEATURE ID: 15] |
| Targeted Patent: Patent: US10771302B2 Filed: 2004-01-29 Issued: 2020-09-08 Patent Holder: (Original Assignee) Neo Wireless LLC (Current Assignee) Neo Wireless LLC Inventor(s): Xiaodong Li, Titus Lo, Kemin Li, Haiming Huang Title: Channel probing signal for a broadband communication system | Cross Reference / Shared Meaning between the Lines |
Charted Against: Patent: US6480558B1 Filed: 1999-03-17 Issued: 2002-11-12 Patent Holder: (Original Assignee) Ericsson Inc (Current Assignee) Ericsson Inc ; Optis Wireless Technology LLC ; Cluster LLC Inventor(s): Tony Ottosson, Yi-Pin Eric Wang Title: Synchronization and cell search methods and apparatus for wireless communications |
| [FEATURE ID: 1] communication method, base station, system, frequency domain, time domain, portion, subsequent transmission, transmission format, modulation, coding, pilot pattern, channel | transmission, transmitter, frequency, transceiver, network, frame, carrier | [FEATURE ID: 1] wireless communications system, common synchronization code, method, synchronization signal, cell, terminal, traffic channel, communications medium, sleep mode |
| [FEATURE ID: 2] mobile device | user, communication, radio, wireless | [FEATURE ID: 2] received |
| [FEATURE ID: 3] communication system, request, information | transmission, channel, waveform, preamble, frame, symbol, code | [FEATURE ID: 3] signal, representation, respective synchronization signal, portion, pilot channel |
| [FEATURE ID: 4] method | following, operations, procedure, step | [FEATURE ID: 4] steps |
| [TRANSITIVE ID: 5] comprising | using, having, involving, with, incorporating, comprises, employing | [TRANSITIVE ID: 5] including, representing, comprising |
| [TRANSITIVE ID: 6] receiving, probing, transmitting, estimating | obtaining, identifying, detecting, acquiring, generating, determining, monitoring | [TRANSITIVE ID: 6] processing |
| [FEATURE ID: 7] signal, spectrum | code, symbol, resource, signals, message, signature, sequence | [FEATURE ID: 7] synchronization detection signal, channel, selection criterion, communications signal, common synchronization signal |
| [FEATURE ID: 8] response | parallel, respect, accordance, addition, answer, proportion, reply | [FEATURE ID: 8] response |
| [TRANSITIVE ID: 9] received | transmission, incoming, reception, transmitted, signal | [TRANSITIVE ID: 9] communications |
| [FEATURE ID: 10] code sequence, transmission, transmission power | sequence, reception, carrier, bandwidth, frequency, duration, preamble | [FEATURE ID: 10] combination, timing, time interval, synchronization code |
| [TRANSITIVE ID: 11] modulated, configured, transmitted, designated | provided, used, generated, distributed, selected, assigned, specified | [TRANSITIVE ID: 11] transmitted, encoded |
| [FEATURE ID: 12] uplink signals, other mobile devices, uplink control signals, uplink data signals, subcarriers | resources, signals, channels, carriers, frames, users, pilots | [FEATURE ID: 12] cells, synchronization signals, candidate cells |
| [FEATURE ID: 13] claim | requirement, step, para claim, paragraph, item, embodiment, aspect | [FEATURE ID: 13] claim |
| [FEATURE ID: 14] channel profile | correlation, distribution, signature, pattern | [FEATURE ID: 14] set |
| [FEATURE ID: 15] time period, center portion | segment, section, part, portion, channel, gap, region | [FEATURE ID: 15] component |
| 1 . A communication method [FEATURE ID: 1] for a mobile device [FEATURE ID: 2] in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system [FEATURE ID: 3] , the method [FEATURE ID: 4] comprising [TRANSITIVE ID: 5] : receiving [TRANSITIVE ID: 6] a request [FEATURE ID: 3] for a probing [TRANSITIVE ID: 6] signal [FEATURE ID: 7] from a base station [FEATURE ID: 1] in the system [FEATURE ID: 1] ; and transmitting [TRANSITIVE ID: 6] , in response [FEATURE ID: 8] to the received [TRANSITIVE ID: 9] request , the probing signal with a code sequence [FEATURE ID: 10] modulated [TRANSITIVE ID: 11] in the frequency domain [FEATURE ID: 1] , wherein : the probing signal is configured [TRANSITIVE ID: 11] to overlap , in the time domain [FEATURE ID: 1] , with uplink signals [FEATURE ID: 12] transmitted [TRANSITIVE ID: 11] over an uplink frequency band by other mobile devices [FEATURE ID: 12] in the system ; and the probing signal is configured to occupy a portion [FEATURE ID: 1] of spectrum [FEATURE ID: 7] in the uplink frequency band not designated [TRANSITIVE ID: 11] for transmission [FEATURE ID: 10] of uplink control signals [FEATURE ID: 12] in the system . 2 . The method of claim [FEATURE ID: 13] 1 , wherein the probing signal provides information [FEATURE ID: 3] for the base station to estimate a channel profile [FEATURE ID: 14] in the frequency domain . 3 . The method of claim 2 , wherein the mobile device receives a subsequent transmission [FEATURE ID: 1] from the base station that has been beamformed using the estimated channel profile . 4 . The method of claim 1 , wherein the probing signal provides information for the base station to determine a transmission format [FEATURE ID: 1] for a subsequent transmission . 5 . The method of claim 4 , wherein the transmission format comprises a modulation [FEATURE ID: 1] / coding [FEATURE ID: 1] or pilot pattern [FEATURE ID: 1] . 6 . The method of claim 1 , wherein the portion of spectrum is available for transmission of uplink data signals [FEATURE ID: 12] by other mobile devices in the system during a time period [FEATURE ID: 15] when the portion of the spectrum is not occupied by the probing signal . 7 . The method of claim 1 , wherein the portion of spectrum is within a center portion [FEATURE ID: 15] of the uplink frequency band and subcarriers [FEATURE ID: 12] for the transmission of uplink control signals are within an outer portion of the uplink frequency band . 8 . A communication method for a base station in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the method comprising : transmitting a request for a probing signal to a mobile device in the system ; and receiving the probing signal from the mobile device , wherein : the probing signal contains a code sequence modulated in the frequency domain ; the probing signal overlaps , in the time domain , with uplink signals transmitted over an uplink frequency band by other mobile devices in the system ; and the probing signal occupies a portion of spectrum in the uplink frequency band not designated for transmission of uplink control signals in the system . 9 . The method of claim 8 , further comprising estimating [FEATURE ID: 6] , based on the received probing signal , a channel profile in the frequency domain . 10 . The method of claim 9 , further comprising using the channel profile to determine a transmission format for a subsequent transmission over the channel [FEATURE ID: 1] . 11 . The method of claim 10 , wherein the transmission format comprises a modulation / coding or pilot pattern . 12 . The method of claim 9 , further comprising using the channel profile for beamforming in a subsequent transmission to the mobile device . 13 . The method of claim 8 , wherein the portion of spectrum is available for transmission of uplink data signals by other mobile devices in the system during a time period when the portion of the spectrum is not occupied by the probing signal . 14 . The method of claim 8 , wherein the portion of spectrum is within a center portion of the uplink frequency band and subcarriers for the transmission of uplink control signals are within an outer portion of the uplink frequency band . 15 . A communication method for an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the method comprising : sending a request for a probing signal to a mobile device from a base station in the system ; and responding by the mobile device to the request by transmitting the probing signal with a code sequence modulated in the frequency domain , wherein : the probing signal is configured to overlap , in the time domain , with uplink signals transmitted over an uplink frequency band by other mobile devices in the system ; and the probing signal is configured to occupy a portion of spectrum in the uplink frequency band not designated for transmission of uplink control signals in the system . 16 . The method of claim 15 , wherein transmission power [FEATURE ID: 10] |
1 . In a wireless communications system [FEATURE ID: 1] including [TRANSITIVE ID: 5] a plurality of cells [FEATURE ID: 12] in which synchronization signals [FEATURE ID: 12] transmitted [TRANSITIVE ID: 11] in the cells are encoded [TRANSITIVE ID: 11] according to a common synchronization code [FEATURE ID: 1] , a method [FEATURE ID: 1] of processing [TRANSITIVE ID: 6] a received [TRANSITIVE ID: 2] communications [FEATURE ID: 9] signal [TRANSITIVE ID: 3] representing [TRANSITIVE ID: 5] a combination [FEATURE ID: 10] of synchronization signals comprising [TRANSITIVE ID: 5] the steps [FEATURE ID: 4] of : correlating the received communications signal with the common synchronization code to produce a synchronization detection signal [FEATURE ID: 7] ; canceling a component [FEATURE ID: 15] of the synchronization detection signal associated with a known synchronization signal [FEATURE ID: 1] from the synchronization detection signal to produce an interference - canceled synchronization detection signal ; and determining timing [FEATURE ID: 10] of a synchronization signal from the interference - canceled synchronization detection signal . 2 . A method according to claim [FEATURE ID: 13] 1 : wherein said step of canceling comprises the steps of : generating a correlation of an estimated received known synchronization signal with the common synchronization code ; and canceling the correlation of the estimated received known synchronization signal with the common synchronization code from the synchronization detection signal to produce the interference - canceled synchronization detection signal ; and wherein said step of determining timing comprises the steps of : accumulating the interference - canceled synchronization detection signal over a time interval [FEATURE ID: 10] ; detecting a peak in the accumulated interference - canceled synchronization detection signal ; and determining timing of a synchronization signal from the detected peak . 3 . A method according to claim 2 , wherein said step of generating a correlation of an estimated received known synchronization signal with the common synchronization code comprises the steps of : filtering a representation [FEATURE ID: 3] of the known synchronization signal with an estimate of a channel [FEATURE ID: 7] over which the known synchronization signal is transmitted to produce an estimated received known synchronization signal ; and correlating the estimated received known synchronization signal with the synchronization code [FEATURE ID: 10] . 4 . A method according to claim 1 : wherein said step of canceling comprises the steps of : accumulating the synchronization detection signal over a time interval ; and identifying a peak in the accumulated synchronization detection signal not associated with a known synchronization signal ; and wherein said step of determining timing comprises the step of determining timing of a synchronization signal from the identified peak . 5 . A method according to claim 4 , wherein said step of identifying a peak comprises the step of identifying a peak in the accumulated synchronization detection signal not associated with a known synchronization signal and meeting a predetermined criterion . 6 . A method according to claim 4 : wherein said step of identifying a peak comprises the steps of : identifying a plurality of peaks in the accumulated synchronization detection signal not associated with a known synchronization signal ; and selecting a peak of the plurality of peaks according to a selection criterion [FEATURE ID: 7] ; and wherein said step of determining timing comprises the step of determining timing of a synchronization signal from the selected peak . 7 . A method according to claim 1 , wherein the known synchronization signal comprises a synchronization signal associated with a previously identified cell [FEATURE ID: 1] . 8 . A method according to claim 7 , wherein the known synchronization signal comprises a synchronization signal associated with a cell with which the terminal [FEATURE ID: 1] is currently communicating over a traffic channel [FEATURE ID: 1] . 9 . A method according to claim 7 : wherein said step of canceling is preceded by the step of identifying a set [FEATURE ID: 14] of synchronization signals associated with a set of candidate cells [FEATURE ID: 12] ; and wherein said step of canceling comprises the step of canceling a component of the synchronization detection signal corresponding to a synchronization signal associated with a cell of the set of candidate cells from the synchronization detection signal to produce an interference - canceled synchronization detection signal . 10 . A method according to claim 9 , wherein said step of identifying a set of known synchronization signals comprises the steps of : receiving a communications signal [FEATURE ID: 7] from the communications medium [FEATURE ID: 1] ; identifying a synchronization signal in the received communications signal ; identifying a cell with which the identified synchronization signal is associated ; and adding the identified cell to the set of candidate cells if the identified synchronization signal associated with the identified cell meets a predetermined criterion . 11 . A method according to claim 1 , wherein a respective synchronization signal [FEATURE ID: 3] includes a portion [FEATURE ID: 3] encoded according to the common synchronization code . 12 . A method according to claim 1 , wherein a common synchronization signal [FEATURE ID: 7] is transmitted in each of the cells over a pilot channel [FEATURE ID: 3] . 13 . A method according to claim 1 , wherein said steps of correlating , canceling and determining are performed in response [FEATURE ID: 8] to the terminal awakening from a sleep mode [FEATURE ID: 1] |
| Targeted Patent: Patent: US10771302B2 Filed: 2004-01-29 Issued: 2020-09-08 Patent Holder: (Original Assignee) Neo Wireless LLC (Current Assignee) Neo Wireless LLC Inventor(s): Xiaodong Li, Titus Lo, Kemin Li, Haiming Huang Title: Channel probing signal for a broadband communication system | Cross Reference / Shared Meaning between the Lines |
Charted Against: Patent: US20020159422A1 Filed: 2001-03-09 Issued: 2002-10-31 Patent Holder: (Original Assignee) Broadstorm Telecommunications Inc (Current Assignee) J & K SERVICES LLC ; SDR HOLDINGS LLC ; Adaptix Inc ; Kaon Systems Inc Inventor(s): Xiaodong Li, Hui Liu, Wenzhong Zhang Title: Communication system using OFDM for one direction and DSSS for another direction |
| [FEATURE ID: 1] communication method, communication system, method, system, time domain, transmission format | transmitter, transmission, receiver, transceiver, channel, communication, scheme | [FEATURE ID: 1] method, base station, system, DSSS transmitter, second switch |
| [FEATURE ID: 2] mobile device, signal, base station | receiver, transmitter, processor, controller, combiner, modem, device | [FEATURE ID: 2] subscriber, DSSS signals, DSSS receiver, second antenna, second frequency duplexer, encoder, FEC encoder, modulator |
| [FEATURE ID: 3] Orthogonal Frequency Division Multiplexing, frequency domain | wideband, of, fm, quadrature, modulation, frequency, optical | [FEATURE ID: 3] orthogonal frequency domain multiplexing |
| [FEATURE ID: 4] OFDM | ff, sf, of, cf, atm, edge, od | [FEATURE ID: 4] OFDM, IFFT |
| [TRANSITIVE ID: 5] comprising | of, by, including, includes, containing, defining, executing | [TRANSITIVE ID: 5] comprising, comprises, having |
| [TRANSITIVE ID: 6] receiving, transmitting, transmission | processing, signaling, sending, generating, receipt, receive, obtaining | [TRANSITIVE ID: 6] communicating, transmitting, receiving |
| [TRANSITIVE ID: 7] modulated, configured, designated, available | specified, selected, assigned, provided, used, scheduled, intended | [TRANSITIVE ID: 7] defined |
| [FEATURE ID: 8] overlap, transmitted | interleave, spread, broadcast, transmission, multiplex, communicate, output | [FEATURE ID: 8] output OFDM signals |
| [FEATURE ID: 9] uplink signals, uplink control signals, uplink data signals, subcarriers, channel | channels, information, symbols, frames, communication, messages, packets | [FEATURE ID: 9] signals, signals, outputs |
| [FEATURE ID: 10] other mobile devices | carriers, transmitters, channels, receivers, users, stations, nodes | [FEATURE ID: 10] subscribers, modulators |
| [FEATURE ID: 11] spectrum | space, code, spread, data, the | [FEATURE ID: 11] direct |
| [FEATURE ID: 12] claim | requirement, step, para claim, the claim, item, embodiment, aspect | [FEATURE ID: 12] claim |
| [FEATURE ID: 13] pilot pattern | channel, retransmission, data, code, diversity | [FEATURE ID: 13] forward error correction |
| 1 . A communication method [FEATURE ID: 1] for a mobile device [FEATURE ID: 2] in an Orthogonal Frequency Division Multiplexing [FEATURE ID: 3] ( OFDM [FEATURE ID: 4] ) communication system [FEATURE ID: 1] , the method [FEATURE ID: 1] comprising [TRANSITIVE ID: 5] : receiving [TRANSITIVE ID: 6] a request for a probing signal [FEATURE ID: 2] from a base station [FEATURE ID: 2] in the system [FEATURE ID: 1] ; and transmitting [TRANSITIVE ID: 6] , in response to the received request , the probing signal with a code sequence modulated [TRANSITIVE ID: 7] in the frequency domain [FEATURE ID: 3] , wherein : the probing signal is configured [TRANSITIVE ID: 7] to overlap [FEATURE ID: 8] , in the time domain [FEATURE ID: 1] , with uplink signals [FEATURE ID: 9] transmitted [TRANSITIVE ID: 8] over an uplink frequency band by other mobile devices [FEATURE ID: 10] in the system ; and the probing signal is configured to occupy a portion of spectrum [FEATURE ID: 11] in the uplink frequency band not designated [TRANSITIVE ID: 7] for transmission [FEATURE ID: 6] of uplink control signals [FEATURE ID: 9] in the system . 2 . The method of claim [FEATURE ID: 12] 1 , wherein the probing signal provides information for the base station to estimate a channel profile in the frequency domain . 3 . The method of claim 2 , wherein the mobile device receives a subsequent transmission from the base station that has been beamformed using the estimated channel profile . 4 . The method of claim 1 , wherein the probing signal provides information for the base station to determine a transmission format [FEATURE ID: 1] for a subsequent transmission . 5 . The method of claim 4 , wherein the transmission format comprises a modulation / coding or pilot pattern [FEATURE ID: 13] . 6 . The method of claim 1 , wherein the portion of spectrum is available [FEATURE ID: 7] for transmission of uplink data signals [FEATURE ID: 9] by other mobile devices in the system during a time period when the portion of the spectrum is not occupied by the probing signal . 7 . The method of claim 1 , wherein the portion of spectrum is within a center portion of the uplink frequency band and subcarriers [FEATURE ID: 9] for the transmission of uplink control signals are within an outer portion of the uplink frequency band . 8 . A communication method for a base station in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the method comprising : transmitting a request for a probing signal to a mobile device in the system ; and receiving the probing signal from the mobile device , wherein : the probing signal contains a code sequence modulated in the frequency domain ; the probing signal overlaps , in the time domain , with uplink signals transmitted over an uplink frequency band by other mobile devices in the system ; and the probing signal occupies a portion of spectrum in the uplink frequency band not designated for transmission of uplink control signals in the system . 9 . The method of claim 8 , further comprising estimating , based on the received probing signal , a channel profile in the frequency domain . 10 . The method of claim 9 , further comprising using the channel profile to determine a transmission format for a subsequent transmission over the channel [FEATURE ID: 9] |
1 . A method [FEATURE ID: 1] for communicating [TRANSITIVE ID: 6] with at least one subscriber [FEATURE ID: 2] , the method comprising [TRANSITIVE ID: 5] : transmitting [TRANSITIVE ID: 6] orthogonal frequency domain multiplexing [FEATURE ID: 3] ( OFDM [FEATURE ID: 4] ) signals [TRANSITIVE ID: 9] to the at least one subscriber ; and receiving [TRANSITIVE ID: 6] direct [FEATURE ID: 11] - sequence spread spectrum ( DSSS ) signals [FEATURE ID: 9] from the at least one subscriber . 2 . The method defined [TRANSITIVE ID: 7] in claim [FEATURE ID: 12] 1 wherein receiving the DSSS signals [FEATURE ID: 2] comprises [TRANSITIVE ID: 5] receiving multiple code division multiple access ( CDMA ) signals from a plurality of subscribers [FEATURE ID: 10] . 3 . A method for communicating with a base station [FEATURE ID: 1] , the method comprising : receiving orthogonal frequency domain multiplexing ( OFDM ) signals from the base station ; and transmitting direct - sequence spread spectrum ( DSSS ) signals to the base station . 4 . The method defined in claim 3 wherein transmitting the DSSS signals comprises transmitting multiple code division multiple access ( CDMA ) signals from a plurality of subscribers . 5 . A system [FEATURE ID: 1] comprising : a subscriber having [TRANSITIVE ID: 5] a DSSS transmitter [FEATURE ID: 1] , an OFDM receiver , a first antenna coupled to the DSSS transmitter and the OFDM receiver ; a base station communicably coupled with the subscriber , the base station having a DSSS receiver [FEATURE ID: 2] , an OFDM transmitter , a second antenna [FEATURE ID: 2] coupled to the DSSS receiver and the OFDM transmitter . 6 . The system defined in claim 5 further comprising : a first switch to couple to the DSSS transmitter and the OFDM receiver to the first antenna ; and a second switch [FEATURE ID: 1] to couple to the DSSS receiver and the OFDM transmitter to the second antenna . 7 . The system defined in claim 5 further comprising : a first frequency duplexer to couple to the DSSS transmitter and the OFDM receiver to the first antenna ; and a second frequency duplexer [FEATURE ID: 2] to couple to the DSSS receiver and the OFDM transmitter to the second antenna . 8 . The system defined in claim 5 wherein the OFDM transmitter comprises : a plurality of processing paths , wherein each of the processing paths has a forward error correction [FEATURE ID: 13] ( FEC ) encoder [FEATURE ID: 2] , an interleaver coupled to an output of the FEC encoder [FEATURE ID: 2] , and a modulator [FEATURE ID: 2] coupled to an output of the interleaver ; and an inverse Fast Fourier Transform ( IFFT [FEATURE ID: 4] ) coupled to receive outputs [FEATURE ID: 9] from modulators [FEATURE ID: 10] in the plurality of processing paths and to output OFDM signals [FEATURE ID: 8] |
| Targeted Patent: Patent: US10771302B2 Filed: 2004-01-29 Issued: 2020-09-08 Patent Holder: (Original Assignee) Neo Wireless LLC (Current Assignee) Neo Wireless LLC Inventor(s): Xiaodong Li, Titus Lo, Kemin Li, Haiming Huang Title: Channel probing signal for a broadband communication system | Cross Reference / Shared Meaning between the Lines |
Charted Against: Patent: US20020141483A1 Filed: 1999-07-28 Issued: 2002-10-03 Patent Holder: (Original Assignee) Individual (Current Assignee) Intel Corp Inventor(s): Markus Doetsch, Tideya Kella, Peter Schmidt, Peter Jung, Jorg Plechinger, Michael Schneider Title: Method for estimating channel impulse responses of a mobile radio channel |
| [FEATURE ID: 1] communication method, transmission format, channel | transmitter, transmission, method, configuration, communication, system, transceiver | [FEATURE ID: 1] code division multiple access system |
| [FEATURE ID: 2] mobile device, base station | transmission, receiver, network, sector, transceiver, system, cell | [FEATURE ID: 2] downlink mobile radio channel, mobile radio receiver, further synchronization channel |
| [FEATURE ID: 3] communication system, frequency domain | system, channel, transmission, transmitter, carrier, bandwidth, burst | [FEATURE ID: 3] time slot |
| [TRANSITIVE ID: 4] comprising | using, including, with, by, providing, containing, being | [TRANSITIVE ID: 4] having |
| [TRANSITIVE ID: 5] receiving, estimating | generating, determining, acquiring, decoding, detecting, establishing, monitoring | [TRANSITIVE ID: 5] estimating, identifying |
| [TRANSITIVE ID: 6] transmitting | supplying, transmission, communicating, emitting, providing, receiving, sending | [TRANSITIVE ID: 6] transmitting |
| [FEATURE ID: 7] code sequence | data, tone, pilot, preamble, code, message, reference | [FEATURE ID: 7] pilot symbol, pilot symbol sequence |
| [TRANSITIVE ID: 8] configured, designated, available | intended, assigned, reserved, scheduled, suitable, utilized, used | [TRANSITIVE ID: 8] provided |
| [FEATURE ID: 9] time domain | receiver, slot, transmission, period, sequence, channel, time | [FEATURE ID: 9] common synchronization channel, case, previous time slot, current time slot |
| [FEATURE ID: 10] uplink signals, uplink data signals | traffic, energy, bits, frames, samples, bursts, packets | [FEATURE ID: 10] information |
| [FEATURE ID: 11] other mobile devices, uplink control signals | users, channels, carriers, symbols, transmissions, signals, terminals | [FEATURE ID: 11] mobile radio receivers |
| [FEATURE ID: 12] claim | requirement, figure, paragraph, item, embodiment, step, clause | [FEATURE ID: 12] claim |
| [FEATURE ID: 13] subsequent transmission | preamble, signal, symbol, pilot, reception, transmission, reference | [FEATURE ID: 13] current pilot symbol sequence, last pilot symbol |
| [FEATURE ID: 14] time period | phase, duration, section, part, stage, moment, interval | [FEATURE ID: 14] position |
| [FEATURE ID: 15] subcarriers | wavelengths, sites, periods, positions, symbols, slots, intervals | [FEATURE ID: 15] points |
| [FEATURE ID: 16] outer portion | edge, index, entirety, endpoint, envelope, ending, area | [FEATURE ID: 16] end |
| 1 . A communication method [FEATURE ID: 1] for a mobile device [FEATURE ID: 2] in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system [FEATURE ID: 3] , the method comprising [TRANSITIVE ID: 4] : receiving [TRANSITIVE ID: 5] a request for a probing signal from a base station [FEATURE ID: 2] in the system ; and transmitting [TRANSITIVE ID: 6] , in response to the received request , the probing signal with a code sequence [FEATURE ID: 7] modulated in the frequency domain [FEATURE ID: 3] , wherein : the probing signal is configured [TRANSITIVE ID: 8] to overlap , in the time domain [FEATURE ID: 9] , with uplink signals [FEATURE ID: 10] transmitted over an uplink frequency band by other mobile devices [FEATURE ID: 11] in the system ; and the probing signal is configured to occupy a portion of spectrum in the uplink frequency band not designated [TRANSITIVE ID: 8] for transmission of uplink control signals [FEATURE ID: 11] in the system . 2 . The method of claim [FEATURE ID: 12] 1 , wherein the probing signal provides information for the base station to estimate a channel profile in the frequency domain . 3 . The method of claim 2 , wherein the mobile device receives a subsequent transmission [FEATURE ID: 13] from the base station that has been beamformed using the estimated channel profile . 4 . The method of claim 1 , wherein the probing signal provides information for the base station to determine a transmission format [FEATURE ID: 1] for a subsequent transmission . 5 . The method of claim 4 , wherein the transmission format comprises a modulation / coding or pilot pattern . 6 . The method of claim 1 , wherein the portion of spectrum is available [FEATURE ID: 8] for transmission of uplink data signals [FEATURE ID: 10] by other mobile devices in the system during a time period [FEATURE ID: 14] when the portion of the spectrum is not occupied by the probing signal . 7 . The method of claim 1 , wherein the portion of spectrum is within a center portion of the uplink frequency band and subcarriers [FEATURE ID: 15] for the transmission of uplink control signals are within an outer portion [FEATURE ID: 16] of the uplink frequency band . 8 . A communication method for a base station in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the method comprising : transmitting a request for a probing signal to a mobile device in the system ; and receiving the probing signal from the mobile device , wherein : the probing signal contains a code sequence modulated in the frequency domain ; the probing signal overlaps , in the time domain , with uplink signals transmitted over an uplink frequency band by other mobile devices in the system ; and the probing signal occupies a portion of spectrum in the uplink frequency band not designated for transmission of uplink control signals in the system . 9 . The method of claim 8 , further comprising estimating [FEATURE ID: 5] , based on the received probing signal , a channel profile in the frequency domain . 10 . The method of claim 9 , further comprising using the channel profile to determine a transmission format for a subsequent transmission over the channel [FEATURE ID: 1] |
1 . A method for estimating [TRANSITIVE ID: 5] mobile radio channel impulse responses in a downlink mobile radio channel [FEATURE ID: 2] in a code division multiple access system [FEATURE ID: 1] that has a common synchronization channel [FEATURE ID: 9] provided [TRANSITIVE ID: 8] for synchronization of each mobile radio receiver [FEATURE ID: 2] , which comprises the steps of : transmitting [TRANSITIVE ID: 6] , via the common synchronization channel , sequences continuously to a plurality of mobile radio receivers [FEATURE ID: 11] , the sequences being known to each of the mobile radio receivers , the sequences transmitted having [TRANSITIVE ID: 4] pilot symbols for identifying [TRANSITIVE ID: 5] the common synchronization channel , and the pilot symbols being transmitted at points [FEATURE ID: 15] which are known to the mobile radio receivers within a time slot [FEATURE ID: 3] ; and evaluating the pilot symbols in the sequences , known to the mobile radio receivers , to jointly estimate delay times and complex amplitudes of the mobile radio channel impulse responses when searching for and identifying the common synchronization channel . 2 . The method according to claim [FEATURE ID: 12] 1 , which comprises evaluating the pilot symbols while searching for and identifying the common synchronization channel during slot synchronization . 3 . The method according to claim 1 , which comprises : transmitting further sequences , via a further synchronization channel [FEATURE ID: 2] ; and using the further sequences for estimating the delay times and the complex amplitudes of the mobile radio channel impulse responses . 4 . The method according to claim 1 , which comprises estimating the mobile radio channel impulse responses in each case [FEATURE ID: 9] on receiving one of a pilot symbol [FEATURE ID: 7] and a pilot symbol sequence [FEATURE ID: 7] at one of a start of the time slot , an end [FEATURE ID: 16] of the time slot , and any position [FEATURE ID: 14] in the time slot . 5 . The method according to claim 1 , which comprises estimating the mobile radio channel impulse responses by one of prediction and interpolation of one of a previous pilot symbol and a previous pilot symbol sequence received in a previous time slot [FEATURE ID: 9] , and one of a current pilot symbol and a current pilot symbol sequence [FEATURE ID: 13] in a current time slot [FEATURE ID: 9] . 6 . The method according to claim 5 , which comprises using further symbols , which are known in the mobile radio receiver for the prediction or the interpolation . 7 . The method according to claim 5 , which comprises buffer storing data and monitoring information [FEATURE ID: 10] transmitted between a last pilot symbol [FEATURE ID: 13] |
| Targeted Patent: Patent: US10771302B2 Filed: 2004-01-29 Issued: 2020-09-08 Patent Holder: (Original Assignee) Neo Wireless LLC (Current Assignee) Neo Wireless LLC Inventor(s): Xiaodong Li, Titus Lo, Kemin Li, Haiming Huang Title: Channel probing signal for a broadband communication system | Cross Reference / Shared Meaning between the Lines |
Charted Against: Patent: US6434364B1 Filed: 1998-12-24 Issued: 2002-08-13 Patent Holder: (Original Assignee) Telefonaktiebolaget LM Ericsson AB (Current Assignee) Optis Wireless Technology LLC ; Cluster LLC Inventor(s): Fergal O'Riordain Title: Wireless communication system that supports mobile test software agents |
| [FEATURE ID: 1] communication method, signal, code sequence, time domain, subsequent transmission, transmission format | message, transmission, channel, system, code, call, communication | [FEATURE ID: 1] parameter, manner, method, test location |
| [FEATURE ID: 2] mobile device, base station, system, channel | network, server, processor, terminal, device, database, controller | [FEATURE ID: 2] communication system, radio network performance manager, network controller, mobile test software agent, mobile station, mobile resident application software, location register |
| [FEATURE ID: 3] communication system | mode, configuration, service, operation, environment | [FEATURE ID: 3] test |
| [FEATURE ID: 4] method | following, methods, procedure, action, step | [FEATURE ID: 4] steps |
| [TRANSITIVE ID: 5] comprising | with, containing, compromising, providing, wherein, of, understanding | [TRANSITIVE ID: 5] comprising |
| [TRANSITIVE ID: 6] receiving | issuing, receipt, transmitting, sending | [TRANSITIVE ID: 6] downloading |
| [FEATURE ID: 7] request | need, permission, requirement, configuration | [FEATURE ID: 7] capability |
| [TRANSITIVE ID: 8] received, configured | specified, indicated, selected, assigned, determined, located, aforementioned | [TRANSITIVE ID: 8] identified |
| [TRANSITIVE ID: 9] modulated, available | identified, configured, designated, assigned, defined, selected, located | [TRANSITIVE ID: 9] specified, available |
| [FEATURE ID: 10] uplink signals, uplink control signals | messages, communication, signals, traffic, channels, packets, pilots | [FEATURE ID: 10] data networks, test system performance information |
| [FEATURE ID: 11] other mobile devices | mobile, equipment, users, resources, components, radios, subscribers | [FEATURE ID: 11] mobile stations |
| [TRANSITIVE ID: 12] occupy | include, detect, identify, use, access, utilize | [TRANSITIVE ID: 12] execute |
| [TRANSITIVE ID: 13] designated | used, dedicated, necessary, required, assigned | [TRANSITIVE ID: 13] relating |
| [FEATURE ID: 14] transmission, transmission power | operation, detection, delivery, performance, power, reception, the | [FEATURE ID: 14] normal operating mode |
| [FEATURE ID: 15] claim | requirement, clause, formula, paragraph, item, aspect, feature | [FEATURE ID: 15] claim |
| [FEATURE ID: 16] information | criteria, parameters, conditions, instructions, characteristics, capability, resources | [FEATURE ID: 16] location information, measurements, location identifiers, choice identifiers |
| [FEATURE ID: 17] uplink data signals | messages, packets, commands, reports, services, information, data | [FEATURE ID: 17] executable mobile test software agents, choice identifier fields |
| [FEATURE ID: 18] subcarriers | areas, addresses, slots, locations, regions, sites, intervals | [FEATURE ID: 18] test locations, capability identifier fields |
| 1 . A communication method [FEATURE ID: 1] for a mobile device [FEATURE ID: 2] in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system [FEATURE ID: 3] , the method [FEATURE ID: 4] comprising [TRANSITIVE ID: 5] : receiving [TRANSITIVE ID: 6] a request [FEATURE ID: 7] for a probing signal [FEATURE ID: 1] from a base station [FEATURE ID: 2] in the system [FEATURE ID: 2] ; and transmitting , in response to the received [TRANSITIVE ID: 8] request , the probing signal with a code sequence [FEATURE ID: 1] modulated [TRANSITIVE ID: 9] in the frequency domain , wherein : the probing signal is configured [TRANSITIVE ID: 8] to overlap , in the time domain [FEATURE ID: 1] , with uplink signals [FEATURE ID: 10] transmitted over an uplink frequency band by other mobile devices [FEATURE ID: 11] in the system ; and the probing signal is configured to occupy [TRANSITIVE ID: 12] a portion of spectrum in the uplink frequency band not designated [TRANSITIVE ID: 13] for transmission [FEATURE ID: 14] of uplink control signals [FEATURE ID: 10] in the system . 2 . The method of claim [FEATURE ID: 15] 1 , wherein the probing signal provides information [FEATURE ID: 16] for the base station to estimate a channel profile in the frequency domain . 3 . The method of claim 2 , wherein the mobile device receives a subsequent transmission [FEATURE ID: 1] from the base station that has been beamformed using the estimated channel profile . 4 . The method of claim 1 , wherein the probing signal provides information for the base station to determine a transmission format [FEATURE ID: 1] for a subsequent transmission . 5 . The method of claim 4 , wherein the transmission format comprises a modulation / coding or pilot pattern . 6 . The method of claim 1 , wherein the portion of spectrum is available [FEATURE ID: 9] for transmission of uplink data signals [FEATURE ID: 17] by other mobile devices in the system during a time period when the portion of the spectrum is not occupied by the probing signal . 7 . The method of claim 1 , wherein the portion of spectrum is within a center portion of the uplink frequency band and subcarriers [FEATURE ID: 18] for the transmission of uplink control signals are within an outer portion of the uplink frequency band . 8 . A communication method for a base station in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the method comprising : transmitting a request for a probing signal to a mobile device in the system ; and receiving the probing signal from the mobile device , wherein : the probing signal contains a code sequence modulated in the frequency domain ; the probing signal overlaps , in the time domain , with uplink signals transmitted over an uplink frequency band by other mobile devices in the system ; and the probing signal occupies a portion of spectrum in the uplink frequency band not designated for transmission of uplink control signals in the system . 9 . The method of claim 8 , further comprising estimating , based on the received probing signal , a channel profile in the frequency domain . 10 . The method of claim 9 , further comprising using the channel profile to determine a transmission format for a subsequent transmission over the channel [FEATURE ID: 2] . 11 . The method of claim 10 , wherein the transmission format comprises a modulation / coding or pilot pattern . 12 . The method of claim 9 , further comprising using the channel profile for beamforming in a subsequent transmission to the mobile device . 13 . The method of claim 8 , wherein the portion of spectrum is available for transmission of uplink data signals by other mobile devices in the system during a time period when the portion of the spectrum is not occupied by the probing signal . 14 . The method of claim 8 , wherein the portion of spectrum is within a center portion of the uplink frequency band and subcarriers for the transmission of uplink control signals are within an outer portion of the uplink frequency band . 15 . A communication method for an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the method comprising : sending a request for a probing signal to a mobile device from a base station in the system ; and responding by the mobile device to the request by transmitting the probing signal with a code sequence modulated in the frequency domain , wherein : the probing signal is configured to overlap , in the time domain , with uplink signals transmitted over an uplink frequency band by other mobile devices in the system ; and the probing signal is configured to occupy a portion of spectrum in the uplink frequency band not designated for transmission of uplink control signals in the system . 16 . The method of claim 15 , wherein transmission power [FEATURE ID: 14] |
1 . A communication system [FEATURE ID: 2] , comprising [TRANSITIVE ID: 5] : a radio network performance manager [FEATURE ID: 2] that originates one or more executable mobile test software agents [FEATURE ID: 17] ; mobile stations [FEATURE ID: 11] that can execute [TRANSITIVE ID: 12] the one or more mobile test software agents , for switching their normal operating mode [FEATURE ID: 14] to a test mode ; a network controller [FEATURE ID: 2] that based on location information [FEATURE ID: 16] identifies one or more mobile stations that can execute mobile test software agents at specified [TRANSITIVE ID: 9] test locations [FEATURE ID: 18] and downloads the one or more executable mobile test software agents to the one or more identified [TRANSITIVE ID: 8] mobile stations . 2 . The communication system of claim [FEATURE ID: 15] 1 , wherein the mobile test software agent [FEATURE ID: 2] passes a parameter [FEATURE ID: 1] relating [TRANSITIVE ID: 13] to a specified test [FEATURE ID: 3] to the mobile station [FEATURE ID: 2] . 3 . The communication system of claim 2 , wherein the mobile station is configured to operate in the test mode using the parameter passed by the mobile test software agent . 4 . The communication system of claim 1 , wherein the mobile test software agent is executed at the mobile station by a mobile resident application software [FEATURE ID: 2] . 5 . The communication system of claim 1 , wherein in the test mode , the mobile station takes specified measurements [FEATURE ID: 16] . 6 . The communication system of claim 1 , wherein in the test mode , the mobile station operates in a manner [FEATURE ID: 1] that measurements may be taken by an external resource . 7 . The communication system of claim 1 , wherein the network controller identifies mobile stations for executing mobile test software agents at the test locations based on information stored in a location register [FEATURE ID: 2] . 8 . The communication system of claim 1 , wherein capability identifier fields [FEATURE ID: 18] in a register identify those mobile stations with the capability [FEATURE ID: 7] to execute the mobile test software agents . 9 . The communication system of claim 1 , wherein choice identifier fields [FEATURE ID: 17] in a register indicate whether corresponding mobile stations that execute mobile test software agents should be placed in test mode or not . 10 . The communication system of claim 1 , wherein the mobile test software agent represents an addressable computer program that can be transported across data networks [FEATURE ID: 10] . 11 . The communication system of claim 1 , wherein said mobile stations may choose not to download the mobile test software agents . 12 . The communication system of claim 1 , wherein the downloading [FEATURE ID: 6] of the one or more executable mobile test software agents is postponed until the one or more mobile stations that execute the mobile test software agents are available [FEATURE ID: 9] at the specified test locations . 13 . A method [FEATURE ID: 1] for operating a communication system , comprising the steps [FEATURE ID: 4] of : determining test locations for performing one or more specified tests within the communication system ; originating executable mobile test software agents that configure mobile stations within the communication system to operate in a test mode , for collecting test system performance information [FEATURE ID: 10] ; identifying one or more mobile stations that can execute the one or more mobile test software agents at the test locations ; downloading the originated executable mobile test software agents to the identified one or more mobile stations ; executing the mobile test software agent at the identified one or more mobile stations ; and operating the mobile station in a normal operating mode after the test mode . 14 . The method of claim 13 , wherein the mobile test software agent passes a parameter relating to the specified test to a mobile station . 15 . The method of claim 14 , wherein the mobile station is configured to operate in the test mode using the parameter passed by the mobile test software agent . 16 . The method of claim 13 , wherein the mobile test software agent is executed at the mobile station by a mobile resident application software . 17 . The method of claim 13 , wherein in the test mode , the mobile station takes specified measurements . 18 . The method of claim 13 , wherein in the test mode , the mobile station operates in a manner that measurements may be taken by an external resource . 19 . The method of claim 13 , the mobile stations that execute mobile test software agents at a test location [FEATURE ID: 1] are identified based on information stored in a location register . 20 . The method of claim 13 , wherein mobile test software agent represents an addressable computer program that can be transported across data networks . 21 . The method of claim 13 , wherein capability identifier fields in a register identify those mobile stations with the capability to execute the mobile test software agents . 22 . The method of claim 13 , wherein choice identifier fields in a register indicate whether corresponding mobile stations that execute mobile test software agents should be placed in test mode or not . 23 . The system of method of communication system of claim 13 , wherein the downloading of the one or more executable mobile test software agents is postponed until the one or more mobile stations that execute the mobile test software agents are available at the specified test locations . 24 . The method of communication system of claim 13 , wherein said mobile stations may choose not to download the mobile test software agents . 25 . A method for operating a communication system , comprising the steps of : listing mobile stations capable of executing executable mobile test software agents that configure the mobile stations to operate in a test mode , for collecting test system performance information ; identifying one or more mobile stations that can execute the one or more mobile test software agents at selected test locations based on capability and location identifiers [FEATURE ID: 16] associated with each one of the listed mobile stations ; and downloading the originated executable mobile test software agents to the identified one or more mobile stations based on choice identifiers [FEATURE ID: 16] |