| Targeted Patent: Patent: US10833908B2 Filed: 2004-01-29 Issued: 2020-11-10 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: US10833908B2 Filed: 2004-01-29 Issued: 2020-11-10 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 station, base station, receiver, cyclic prefix addition circuit | transmitter, processor, transceiver, mobile, controller, network, satellite | [FEATURE ID: 1] base station, remote station, remote station clock, wireless discrete multitone spread spectrum communications system |
| [TRANSITIVE ID: 2] comprising, utilizes | having, comprises, with, of, using, by, containing | [TRANSITIVE ID: 2] comprising, including |
| [FEATURE ID: 3] transmitter | broadcaster, sender, transmission, receiver | [FEATURE ID: 3] source |
| [TRANSITIVE ID: 4] configured | formed, used, operable, disposed, included, set, operative | [TRANSITIVE ID: 4] arranged, part |
| [FEATURE ID: 5] first uplink signal, signal, random access signal, guard period, portion, sequence, second uplink signal, power adjustment information, mobile station identifier, spread spectrum signal, broadcast information, serial | preamble, burst, message, transmission, channel, data, code | [FEATURE ID: 5] synchronization burst, time window, synchronization signal, spread signal, error signal spread |
| [FEATURE ID: 6] frequency band, timeslot, control channels | frequency, window, duration, resource, time, spectrum, channel | [FEATURE ID: 6] bandwidth, base station reference instant |
| [FEATURE ID: 7] orthogonal frequency division multiplexing | output, uplink, amplitude, interlace | [FEATURE ID: 7] incoming signal |
| [FEATURE ID: 8] frame format | duration, rate, time, waveform, value, window, frame | [FEATURE ID: 8] remote station reference instant, phase |
| [FEATURE ID: 9] timeslots, uplink control signals | channels, transmissions, resources, tones, symbols, times, components | [FEATURE ID: 9] tone frequencies, outgoing frequencies, incoming frequencies |
| [FEATURE ID: 10] OFDM symbols | symbols, signals, antennas, resources | [FEATURE ID: 10] weights |
| [TRANSITIVE ID: 11] associated | common, identifier, related, corresponding | [TRANSITIVE ID: 11] pattern unique |
| [FEATURE ID: 12] time duration | spacing, delay, transmission, separation, mismatch, time, timing | [FEATURE ID: 12] relative phase error, difference |
| [TRANSITIVE ID: 13] receive, use | access, reception, receiving, transmit, receipt, reference, communication | [TRANSITIVE ID: 13] receive |
| [FEATURE ID: 14] response message | reaction, answer, responding, reply | [FEATURE ID: 14] response |
| [FEATURE ID: 15] claim | item, the claim, embodiment, aspect, feature, figure, clam | [FEATURE ID: 15] claim |
| [FEATURE ID: 16] transmission | receipt, reception, the, propagation, appearance, distribution, detection | [FEATURE ID: 16] pattern, arrival |
| [FEATURE ID: 17] OFDM transmitter signal processing circuit, inverse Fourier | array, uplink, antenna, input, amplitude, emitter, output | [FEATURE ID: 17] antenna element, outgoing synchronization signal |
| 1 . A mobile station [FEATURE ID: 1] comprising [TRANSITIVE ID: 2] : a transmitter [FEATURE ID: 3] configured [TRANSITIVE ID: 4] to : transmit , to a base station [FEATURE ID: 1] , a first uplink signal [FEATURE ID: 5] within a frequency band [FEATURE ID: 6] , wherein the first uplink signal is an orthogonal frequency division multiplexing [FEATURE ID: 7] ( OFDM ) signal [FEATURE ID: 5] and utilizes [TRANSITIVE ID: 2] a frame format [FEATURE ID: 8] comprising a plurality of timeslots [FEATURE ID: 9] , each timeslot [FEATURE ID: 6] comprising a plurality of OFDM symbols [FEATURE ID: 10] ; transmit , to the base station , a random access signal [FEATURE ID: 5] followed by a guard period [FEATURE ID: 5] in only a portion [FEATURE ID: 5] of the frequency band , wherein the random access signal includes a sequence [FEATURE ID: 5] associated [TRANSITIVE ID: 11] with the base station , wherein a time duration [FEATURE ID: 12] of a combination of the random access signal and the guard period is greater than a time duration of at least one of the plurality of OFDM symbols ; and a receiver [FEATURE ID: 1] configured to receive [TRANSITIVE ID: 13] , from the base station , a response message [FEATURE ID: 14] . 2 . The mobile station of claim [FEATURE ID: 15] 1 , wherein : the receiver is configured to determine if the response message identifies the sequence associated with the base station in the random access signal ; and on a condition that the response message identifies the sequence associated with the base station in the random access signal , the transmitter is configured to transmit a second uplink signal [FEATURE ID: 5] . 3 . The mobile station of claim 2 , wherein the response message includes power adjustment information [FEATURE ID: 5] and wherein the transmitter is configured to transmit the second uplink signal according to the power adjustment information . 4 . The mobile station of claim 1 , wherein the portion of the frequency band used for transmission [FEATURE ID: 16] of the random access signal does not include control channels [FEATURE ID: 6] . 5 . The mobile station of claim 1 , wherein the response message includes a mobile station identifier [FEATURE ID: 5] assigned to the mobile station . 6 . The mobile station of claim 1 , wherein the time duration of the combination of the random access signal and the guard period is greater than a time duration of at least two of the plurality of OFDM symbols . 7 . The mobile station of claim 1 , wherein the frequency band includes an outer portion and a center portion , wherein the portion of the frequency band for the random access signal is in the center portion and uplink control signals [FEATURE ID: 9] are sent in the outer portion . 8 . The mobile station of claim 1 , wherein the random access signal is a spread spectrum signal [FEATURE ID: 5] . 9 . The mobile station of claim 1 , wherein : the receiver is further configured to receive broadcast information [FEATURE ID: 5] from the base station , the broadcast information indicating at least one sequence associated with the base station for use [FEATURE ID: 13] in producing the random access signal . 10 . The mobile station of claim 1 , wherein the transmitter includes an OFDM transmitter signal processing circuit [FEATURE ID: 17] comprising : a serial [FEATURE ID: 5] to parallel converter , an inverse Fourier [FEATURE ID: 17] transform , and a cyclic prefix addition circuit [FEATURE ID: 1] |
1 . A highly bandwidth [FEATURE ID: 6] - efficient communications method , comprising [TRANSITIVE ID: 2] : forming a synchronization burst [FEATURE ID: 5] at an antenna element [FEATURE ID: 17] of a base station [FEATURE ID: 1] , including [TRANSITIVE ID: 2] a plurality of tone frequencies [FEATURE ID: 9] arranged [TRANSITIVE ID: 4] in a distinctive orthogonal frequency division multiplexed pattern unique [FEATURE ID: 11] to the base station ; transmitting the synchronization burst from the antenna element at a base station reference instant [FEATURE ID: 6] of time ; receiving the synchronization burst at a remote station [FEATURE ID: 1] during a remote station receive [TRANSITIVE ID: 13] time window [FEATURE ID: 5] which begins at a remote station reference instant [FEATURE ID: 8] of time established by a remote station clock [FEATURE ID: 1] ; recognizing the pattern [FEATURE ID: 16] of the plurality of tone frequencies as having the base station as the source [FEATURE ID: 3] 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: 14] 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: 15] 1 , wherein deriving further comprises : deriving from the error signal a second value related to a relative phase error [FEATURE ID: 12] 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 [FEATURE ID: 10] at the base station to spread an outgoing synchronization signal [FEATURE ID: 17] over a plurality of outgoing frequencies [FEATURE ID: 9] , using the pattern ; and spreading the synchronization signal [FEATURE ID: 5] 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: 5] comprising an incoming signal [FEATURE ID: 7] that includes the error signal spread [FEATURE ID: 5] over a plurality of incoming frequencies [FEATURE ID: 9] ; 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 [FEATURE ID: 12] 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 [FEATURE ID: 4] 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: 16] 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: US10833908B2 Filed: 2004-01-29 Issued: 2020-11-10 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] mobile station, transmitter, base station, frequency band, frame format, guard period, receiver, mobile station identifier, cyclic prefix addition circuit | system, modem, transceiver, preamble, processor, radio, device | [FEATURE ID: 1] multicarrier transmission apparatus, transmission unit, frequency direction, multicarrier reception apparatus |
| [TRANSITIVE ID: 2] comprising | of, including, using, with, containing, involving, describing | [TRANSITIVE ID: 2] comprising, having |
| [TRANSITIVE ID: 3] configured | disposed, connected, used, arranged | [TRANSITIVE ID: 3] sent |
| [FEATURE ID: 4] first uplink signal, timeslot, random access signal, portion, second uplink signal, transmission, spread spectrum signal, serial | symbol, sequence, code, burst, channel, packet, pilot | [FEATURE ID: 4] pilot signal, pilot signal string, time sequence, predetermined range, data, multicarrier CDMA system, cell identification signal, pilot carrier, same pattern, signal, synchronization |
| [FEATURE ID: 5] signal | structure, sequence, configuration, scheme, shape, format, code | [FEATURE ID: 5] pattern, way |
| [TRANSITIVE ID: 6] utilizes, includes, identifies | has, specifies, uses, employs, defines, contains, represents | [TRANSITIVE ID: 6] allows |
| [FEATURE ID: 7] timeslots, uplink control signals | channels, frames, bursts, symbols, blocks, tones, patterns | [FEATURE ID: 7] carriers, pilot signals, pilot carrier signal strings, cells |
| [FEATURE ID: 8] OFDM symbols, power adjustment information, control channels, broadcast information | data, information, symbols, transmissions, signaling, the, power | [FEATURE ID: 8] subcarriers |
| [FEATURE ID: 9] sequence | phase, number, code, symbol | [FEATURE ID: 9] value |
| [FEATURE ID: 10] time duration | repetition, periodicity, size, length | [FEATURE ID: 10] same cycle |
| [FEATURE ID: 11] claim | statement, previous claim, paragraph, the claim, requirement, feature, figure | [FEATURE ID: 11] claim |
| [FEATURE ID: 12] use | processing, sending, detection, reception, transmitting, decoding, transmission | [FEATURE ID: 12] inserting, channel estimation |
| [FEATURE ID: 13] parallel converter | sequential, sequence, random, series | [FEATURE ID: 13] varying |
| 1 . A mobile station [FEATURE ID: 1] comprising [TRANSITIVE ID: 2] : a transmitter [FEATURE ID: 1] configured [TRANSITIVE ID: 3] to : transmit , to a base station [FEATURE ID: 1] , a first uplink signal [FEATURE ID: 4] within a frequency band [FEATURE ID: 1] , wherein the first uplink signal is an orthogonal frequency division multiplexing ( OFDM ) signal [FEATURE ID: 5] and utilizes [TRANSITIVE ID: 6] a frame format [FEATURE ID: 1] comprising a plurality of timeslots [FEATURE ID: 7] , each timeslot [FEATURE ID: 4] comprising a plurality of OFDM symbols [FEATURE ID: 8] ; transmit , to the base station , a random access signal [FEATURE ID: 4] followed by a guard period [FEATURE ID: 1] in only a portion [FEATURE ID: 4] of the frequency band , wherein the random access signal includes [TRANSITIVE ID: 6] a sequence [FEATURE ID: 9] associated with the base station , wherein a time duration [FEATURE ID: 10] of a combination of the random access signal and the guard period is greater than a time duration of at least one of the plurality of OFDM symbols ; and a receiver [FEATURE ID: 1] configured to receive , from the base station , a response message . 2 . The mobile station of claim [FEATURE ID: 11] 1 , wherein : the receiver is configured to determine if the response message identifies [TRANSITIVE ID: 6] the sequence associated with the base station in the random access signal ; and on a condition that the response message identifies the sequence associated with the base station in the random access signal , the transmitter is configured to transmit a second uplink signal [FEATURE ID: 4] . 3 . The mobile station of claim 2 , wherein the response message includes power adjustment information [FEATURE ID: 8] and wherein the transmitter is configured to transmit the second uplink signal according to the power adjustment information . 4 . The mobile station of claim 1 , wherein the portion of the frequency band used for transmission [FEATURE ID: 4] of the random access signal does not include control channels [FEATURE ID: 8] . 5 . The mobile station of claim 1 , wherein the response message includes a mobile station identifier [FEATURE ID: 1] assigned to the mobile station . 6 . The mobile station of claim 1 , wherein the time duration of the combination of the random access signal and the guard period is greater than a time duration of at least two of the plurality of OFDM symbols . 7 . The mobile station of claim 1 , wherein the frequency band includes an outer portion and a center portion , wherein the portion of the frequency band for the random access signal is in the center portion and uplink control signals [FEATURE ID: 7] are sent in the outer portion . 8 . The mobile station of claim 1 , wherein the random access signal is a spread spectrum signal [FEATURE ID: 4] . 9 . The mobile station of claim 1 , wherein : the receiver is further configured to receive broadcast information [FEATURE ID: 8] from the base station , the broadcast information indicating at least one sequence associated with the base station for use [FEATURE ID: 12] in producing the random access signal . 10 . The mobile station of claim 1 , wherein the transmitter includes an OFDM transmitter signal processing circuit comprising : a serial [FEATURE ID: 4] to parallel converter [FEATURE ID: 13] , an inverse Fourier transform , and a cyclic prefix addition circuit [FEATURE ID: 1] |
1 . A multicarrier transmission apparatus [FEATURE ID: 1] comprising [TRANSITIVE ID: 2] : pilot signal [FEATURE ID: 4] generating means for generating a pilot signal string [FEATURE ID: 4] having [TRANSITIVE ID: 2] a time - varying [TRANSITIVE ID: 13] pattern [FEATURE ID: 5] ; and pilot signal inserting [TRANSITIVE ID: 12] means for inserting the pilot signal string divided into a plurality of carriers [FEATURE ID: 7] which are sent [TRANSITIVE ID: 3] in time sequence [FEATURE ID: 4] . 2 . The multicarrier transmission apparatus according to claim [FEATURE ID: 11] 1 , wherein the pilot signal inserting means allows [TRANSITIVE ID: 6] subcarriers [FEATURE ID: 8] involving DC components 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: 5] that the numbers of positive and negative pilot signals making up the pilot signal string are identical within a predetermined range [FEATURE ID: 4] . 4 . The multicarrier transmission apparatus according to claim 1 , wherein the pilot signal generating means generates pilot signals [FEATURE ID: 7] having a pattern of the same cycle [FEATURE ID: 10] as that a transmission unit [FEATURE ID: 1] . 5 . The multicarrier transmission apparatus according to claim 1 , wherein data [FEATURE ID: 4] is transmitted according to a multicarrier CDMA system [FEATURE ID: 4] . 6 . The multicarrier transmission apparatus according to claim 5 , wherein a cell identification signal [FEATURE ID: 4] is transmitted using a pilot carrier [FEATURE ID: 4] . 7 . The multicarrier transmission apparatus according to claim 6 , wherein pilot carrier signal strings [FEATURE ID: 7] are made orthogonal to one another between neighboring cells [FEATURE ID: 7] . 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 means for carrying out channel estimation [FEATURE ID: 12] by correlating a plurality of extracted pilot signals arranged in time sequence with the same pattern [FEATURE ID: 4] 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: 9] 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 on the signal [FEATURE ID: 4] subjected to frequency offset compensation processing . 12 . A multicarrier reception apparatus comprising : pilot signal extracting means for extracting pilot signals carried on a pilot carrier ; and synchronization [FEATURE ID: 4] |
| Targeted Patent: Patent: US10833908B2 Filed: 2004-01-29 Issued: 2020-11-10 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] mobile station, transmitter, receiver, cyclic prefix addition circuit | processor, modem, controller, terminal, transceiver, mobile, circuit | [FEATURE ID: 1] mobile station, correlation technique |
| [TRANSITIVE ID: 2] comprising | describing, understanding, by, performing, compromising, wherein, incorporating | [TRANSITIVE ID: 2] comprising |
| [FEATURE ID: 3] base station | transceiver, station base, reference station, website, mobile station, basis, database | [FEATURE ID: 3] base station |
| [FEATURE ID: 4] first uplink signal, frequency band, timeslot, guard period, portion, sequence, serial | channel, symbol, signal, time, slot, data, code | [FEATURE ID: 4] single time slot, repeated, structure, frequency, time synchronization, general broadcast channel |
| [FEATURE ID: 5] signal | scheme, communication, configuration, sequence, format, transmission, structure | [FEATURE ID: 5] system |
| [TRANSITIVE ID: 6] utilizes, includes, identifies | has, contains, uses, represents, indicates, of, specifies | [TRANSITIVE ID: 6] comprises, have, occupies |
| [FEATURE ID: 7] frame format, time duration | bandwidth, periodicity, duration, time, cycle, window, length | [FEATURE ID: 7] same time duration |
| [FEATURE ID: 8] timeslots, OFDM symbols, broadcast information | transmissions, blocks, channels, bursts, periods, slots, windows | [FEATURE ID: 8] frames, symbols |
| [FEATURE ID: 9] claim | statement, the claim, clam, embodiment, item, previous claim, requirement | [FEATURE ID: 9] claim |
| [FEATURE ID: 10] second uplink signal, control channels, spread spectrum signal | pilot, data, packet, message, symbol, signal, code | [FEATURE ID: 10] cell |
| [FEATURE ID: 11] transmission | retransmission, receipt, distribution, generation, propagation, sending, transfer | [FEATURE ID: 11] transmission |
| [FEATURE ID: 12] uplink control signals | channels, traffic, frames, services | [FEATURE ID: 12] traffic slots |
| [FEATURE ID: 13] use | implementation, employment, using, usage, application | [FEATURE ID: 13] means |
| 1 . A mobile station [FEATURE ID: 1] comprising [TRANSITIVE ID: 2] : a transmitter [FEATURE ID: 1] configured to : transmit , to a base station [FEATURE ID: 3] , a first uplink signal [FEATURE ID: 4] within a frequency band [FEATURE ID: 4] , wherein the first uplink signal is an orthogonal frequency division multiplexing ( OFDM ) signal [FEATURE ID: 5] and utilizes [TRANSITIVE ID: 6] a frame format [FEATURE ID: 7] comprising a plurality of timeslots [FEATURE ID: 8] , each timeslot [FEATURE ID: 4] comprising a plurality of OFDM symbols [FEATURE ID: 8] ; transmit , to the base station , a random access signal followed by a guard period [FEATURE ID: 4] in only a portion [FEATURE ID: 4] of the frequency band , wherein the random access signal includes [TRANSITIVE ID: 6] a sequence [FEATURE ID: 4] associated with the base station , wherein a time duration [FEATURE ID: 7] of a combination of the random access signal and the guard period is greater than a time duration of at least one of the plurality of OFDM symbols ; and a receiver [FEATURE ID: 1] configured to receive , from the base station , a response message . 2 . The mobile station of claim [FEATURE ID: 9] 1 , wherein : the receiver is configured to determine if the response message identifies [TRANSITIVE ID: 6] the sequence associated with the base station in the random access signal ; and on a condition that the response message identifies the sequence associated with the base station in the random access signal , the transmitter is configured to transmit a second uplink signal [FEATURE ID: 10] . 3 . The mobile station of claim 2 , wherein the response message includes power adjustment information and wherein the transmitter is configured to transmit the second uplink signal according to the power adjustment information . 4 . The mobile station of claim 1 , wherein the portion of the frequency band used for transmission [FEATURE ID: 11] of the random access signal does not include control channels [FEATURE ID: 10] . 5 . The mobile station of claim 1 , wherein the response message includes a mobile station identifier assigned to the mobile station . 6 . The mobile station of claim 1 , wherein the time duration of the combination of the random access signal and the guard period is greater than a time duration of at least two of the plurality of OFDM symbols . 7 . The mobile station of claim 1 , wherein the frequency band includes an outer portion and a center portion , wherein the portion of the frequency band for the random access signal is in the center portion and uplink control signals [FEATURE ID: 12] are sent in the outer portion . 8 . The mobile station of claim 1 , wherein the random access signal is a spread spectrum signal [FEATURE ID: 10] . 9 . The mobile station of claim 1 , wherein : the receiver is further configured to receive broadcast information [FEATURE ID: 8] from the base station , the broadcast information indicating at least one sequence associated with the base station for use [FEATURE ID: 13] in producing the random access signal . 10 . The mobile station of claim 1 , wherein the transmitter includes an OFDM transmitter signal processing circuit comprising : a serial [FEATURE ID: 4] to parallel converter , an inverse Fourier transform , and a cyclic prefix addition circuit [FEATURE ID: 1] |
1 . Wireless transmission method , comprising [TRANSITIVE ID: 2] the step of : transmitting data in frames [FEATURE ID: 8] according to a time divisional duplex ( TDD ) system [FEATURE ID: 5] , wherein frame comprises [TRANSITIVE ID: 6] a header slot ( HS ) and a plurality of traffic slots [FEATURE ID: 12] ( TS ) , wherein the header slot ( HS ) and the individual traffic slots ( TS ) have [TRANSITIVE ID: 6] the same time duration [FEATURE ID: 7] , wherein the header slot ( HS ) occupies [TRANSITIVE ID: 6] a single time slot [FEATURE ID: 4] , and wherein the header slot ( HS ) is subdivided into : a downlink channel ( DC ) for the transmission [FEATURE ID: 11] of synchronization data ( SYNCH ) and system data from a base station [FEATURE ID: 3] ( 1 ) to at least one mobile station [FEATURE ID: 1] ( 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 ) . 2 . Wireless transmission method according to claim [FEATURE ID: 9] 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 ( GBCCH , OBCCH ) for the transmission of cell [FEATURE ID: 10] and / or system data to all or selected mobile stations ( 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: 4] symbols [FEATURE ID: 8] ( 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: 4] of the synchronization channel ( SYNCH ) and / or the broadcast channel ( GBCCH , OBCCH ) of the header slot ( HS ) is used for a frequency [FEATURE ID: 4] and / or time synchronization [FEATURE ID: 4] by means [FEATURE ID: 13] 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: 4] |
| Targeted Patent: Patent: US10833908B2 Filed: 2004-01-29 Issued: 2020-11-10 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] mobile station, transmitter, base station, frame format, portion, receiver | system, radio, transceiver, transmission, device, bandwidth, spectrum | [FEATURE ID: 1] CDMA system, method, wireless communication channel, frequency domain, communication channel |
| [TRANSITIVE ID: 2] comprising, utilizes | of, including, comprises, having, with, implementing, compromising | [TRANSITIVE ID: 2] comprising |
| [FEATURE ID: 3] first uplink signal, random access signal, guard period, sequence, time duration, second uplink signal, control channels, mobile station identifier, uplink control signals, broadcast information, serial, cyclic prefix addition circuit | symbol, data, signal, preamble, transmission, code, channel | [FEATURE ID: 3] multiple, processing data, data stream, particular, data symbol stream, particular transformation, cyclic prefix, OFDM symbol, transmission symbol, cover code, particular modulation scheme, pilot |
| [FEATURE ID: 4] frequency band, orthogonal frequency division multiplexing, timeslot, spread spectrum signal | channel, tone, subframe, cell, of, orthogonal, spectrum | [FEATURE ID: 4] access OFDM |
| [FEATURE ID: 5] signal, transmission, use | code, signaling, modulation, sequence, receipt, communication, structure | [FEATURE ID: 5] transmission, scheme, stream, particular gain, length |
| [FEATURE ID: 6] timeslots, power adjustment information | tones, values, pilots, samples, coefficients, frames, signals | [FEATURE ID: 6] codes, OFDM symbols, transmission symbols, bits, modulation symbols |
| [FEATURE ID: 7] OFDM symbols | signals, channels, bits, data, symbols, chips, information | [FEATURE ID: 7] data symbols, spread data, orthogonal codes |
| [FEATURE ID: 8] combination | plurality, selection, sequence, pair | [FEATURE ID: 8] set |
| [TRANSITIVE ID: 9] receive | derive, transmit, obtain, determine, process | [TRANSITIVE ID: 9] provide |
| [FEATURE ID: 10] claim | requirement, the claim, statement, paragraph, aspect, feature, figure | [FEATURE ID: 10] claim |
| [FEATURE ID: 11] parallel converter | parallel, binary, circular, random | [FEATURE ID: 11] Walsh codes |
| [FEATURE ID: 12] inverse Fourier | interpolation, walsh, ff, fourier, antenna, exponential, iterative | [FEATURE ID: 12] inverse Fourier |
| 1 . A mobile station [FEATURE ID: 1] comprising [TRANSITIVE ID: 2] : a transmitter [FEATURE ID: 1] configured to : transmit , to a base station [FEATURE ID: 1] , a first uplink signal [FEATURE ID: 3] within a frequency band [FEATURE ID: 4] , wherein the first uplink signal is an orthogonal frequency division multiplexing [FEATURE ID: 4] ( OFDM ) signal [FEATURE ID: 5] and utilizes [TRANSITIVE ID: 2] a frame format [FEATURE ID: 1] comprising a plurality of timeslots [FEATURE ID: 6] , each timeslot [FEATURE ID: 4] comprising a plurality of OFDM symbols [FEATURE ID: 7] ; transmit , to the base station , a random access signal [FEATURE ID: 3] followed by a guard period [FEATURE ID: 3] in only a portion [FEATURE ID: 1] of the frequency band , wherein the random access signal includes a sequence [FEATURE ID: 3] associated with the base station , wherein a time duration [FEATURE ID: 3] of a combination [FEATURE ID: 8] of the random access signal and the guard period is greater than a time duration of at least one of the plurality of OFDM symbols ; and a receiver [FEATURE ID: 1] configured to receive [TRANSITIVE ID: 9] , from the base station , a response message . 2 . The mobile station of claim [FEATURE ID: 10] 1 , wherein : the receiver is configured to determine if the response message identifies the sequence associated with the base station in the random access signal ; and on a condition that the response message identifies the sequence associated with the base station in the random access signal , the transmitter is configured to transmit a second uplink signal [FEATURE ID: 3] . 3 . The mobile station of claim 2 , wherein the response message includes power adjustment information [FEATURE ID: 6] and wherein the transmitter is configured to transmit the second uplink signal according to the power adjustment information . 4 . The mobile station of claim 1 , wherein the portion of the frequency band used for transmission [FEATURE ID: 5] of the random access signal does not include control channels [FEATURE ID: 3] . 5 . The mobile station of claim 1 , wherein the response message includes a mobile station identifier [FEATURE ID: 3] assigned to the mobile station . 6 . The mobile station of claim 1 , wherein the time duration of the combination of the random access signal and the guard period is greater than a time duration of at least two of the plurality of OFDM symbols . 7 . The mobile station of claim 1 , wherein the frequency band includes an outer portion and a center portion , wherein the portion of the frequency band for the random access signal is in the center portion and uplink control signals [FEATURE ID: 3] are sent in the outer portion . 8 . The mobile station of claim 1 , wherein the random access signal is a spread spectrum signal [FEATURE ID: 4] . 9 . The mobile station of claim 1 , wherein : the receiver is further configured to receive broadcast information [FEATURE ID: 3] from the base station , the broadcast information indicating at least one sequence associated with the base station for use [FEATURE ID: 5] in producing the random access signal . 10 . The mobile station of claim 1 , wherein the transmitter includes an OFDM transmitter signal processing circuit comprising : a serial [FEATURE ID: 3] to parallel converter [FEATURE ID: 11] , an inverse Fourier [FEATURE ID: 12] transform , and a cyclic prefix addition circuit [FEATURE ID: 3] |
1 . In a multiple [FEATURE ID: 3] - access OFDM [FEATURE ID: 4] - CDMA system [FEATURE ID: 1] , a method [FEATURE ID: 1] for processing data [FEATURE ID: 3] for transmission [FEATURE ID: 5] over a wireless communication channel [FEATURE ID: 1] , comprising [TRANSITIVE ID: 2] : coding a data stream [FEATURE ID: 3] in accordance with a particular [FEATURE ID: 3] coding scheme [FEATURE ID: 5] to provide [TRANSITIVE ID: 9] a stream [FEATURE ID: 5] of data symbols [FEATURE ID: 7] ; spreading the data symbol stream [FEATURE ID: 3] in a frequency domain [FEATURE ID: 1] with one or more spreading codes [FEATURE ID: 6] to provide spread data [FEATURE ID: 7] , wherein the one or more spreading codes are selected from a set [FEATURE ID: 8] of available spreading codes and assigned to the data stream ; transforming the spread data in accordance with a particular transformation [FEATURE ID: 3] to provide a stream of OFDM symbols [FEATURE ID: 6] ; scaling the stream of OFDM symbols in accordance with a particular gain [FEATURE ID: 5] selected for the data stream ; and transmitting the scaled OFDM symbols over the communication channel [FEATURE ID: 1] . 2 . The method of claim [FEATURE ID: 10] 1 , further comprising : appending a cyclic prefix [FEATURE ID: 3] to each OFDM symbol [FEATURE ID: 3] to provide a corresponding transmission symbol [FEATURE ID: 3] , wherein transmission symbols [FEATURE ID: 6] 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: 3] . 4 . The method of claim 3 , wherein the cover code has a length [FEATURE ID: 5] 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: 6] . 7 . The method of claim 1 , wherein the data symbol stream comprises modulation symbols [FEATURE ID: 6] derived based on a particular modulation scheme [FEATURE ID: 3] . 8 . The method of claim 1 , further comprising : transmitting a pilot [FEATURE ID: 3] along with the scaled OFDM symbols over the communication channel . 9 . The method of claim 1 , wherein the spreading codes are Walsh codes [FEATURE ID: 11] . 10 . The method of claim 1 , wherein the spreading codes are orthogonal codes [FEATURE ID: 7] . 11 . The method of claim 1 , wherein the spreading codes are pseudo-orthogonal codes . 12 . The method of claim 1 , wherein the transformation is an inverse Fourier [FEATURE ID: 12] |
| Targeted Patent: Patent: US10833908B2 Filed: 2004-01-29 Issued: 2020-11-10 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] mobile station, transmitter, receiver | device, transceiver, radio, system, transmission, processor, station | [FEATURE ID: 1] OFDM transmitter, antenna, transmitter |
| [TRANSITIVE ID: 2] configured | implemented, arranged, connected, enabled, used, coupled, disposed | [TRANSITIVE ID: 2] adapted |
| [TRANSITIVE ID: 3] transmit | receive, convey, generate, output, emit, broadcast, send | [TRANSITIVE ID: 3] transmit |
| [FEATURE ID: 4] first uplink signal, signal, frame format, timeslot, random access signal, guard period, portion, sequence, time duration, second uplink signal, mobile station identifier, spread spectrum signal | symbol, payload, channel, pilot, transmission, subframe, message | [FEATURE ID: 4] header symbol format, header OFDM symbol, header symbols, dedicated pilot channel, header OFDM symbols, preamble, prefix, header OFDM symbol format, cyclic extension, complex sequence, pilot channel |
| [FEATURE ID: 5] frequency band | range, portion, region, sector | [FEATURE ID: 5] different set |
| [FEATURE ID: 6] timeslots, uplink control signals | carriers, transmissions, tones, pilots, symbols, frames, channels | [FEATURE ID: 6] sub-carriers, antennas, common synchronization channel sub-carriers, identical OFDM symbols, pilot channel sub-carriers |
| [FEATURE ID: 7] OFDM symbols, broadcast information | data, signals, symbols, information, channels, signaling, transmissions | [FEATURE ID: 7] common synchronization channel |
| [TRANSITIVE ID: 8] followed | bounded, identified, characterized, covered, defined, delimited | [TRANSITIVE ID: 8] separated |
| [TRANSITIVE ID: 9] associated | corresponding, synchronized, used, shared, aligned, similar, orthogonal | [TRANSITIVE ID: 9] assigned, common, respective |
| [FEATURE ID: 10] combination | group, set, plurality, sequence, pair, subset, number | [FEATURE ID: 10] non-contiguous set, respective set |
| [FEATURE ID: 11] claim | embodiment, clam, item, paragraph, requirement, aspect, figure | [FEATURE ID: 11] claim |
| [FEATURE ID: 12] control channels | pilot, traffic, data, information, signaling, channels | [FEATURE ID: 12] dedicated pilot channel sub-carriers, broadcasting sub-carriers |
| [FEATURE ID: 13] use | using, sending, detection, spreading, processing, reuse, reception | [FEATURE ID: 13] transmitting, efficient BTS identification |
| [FEATURE ID: 14] serial | symbol, bit, vector, frequency, time, complex, single | [FEATURE ID: 14] BTS specific |
| 1 . A mobile station [FEATURE ID: 1] comprising : a transmitter [FEATURE ID: 1] configured [TRANSITIVE ID: 2] to : transmit [TRANSITIVE ID: 3] , to a base station , a first uplink signal [FEATURE ID: 4] within a frequency band [FEATURE ID: 5] , wherein the first uplink signal is an orthogonal frequency division multiplexing ( OFDM ) signal [FEATURE ID: 4] and utilizes a frame format [FEATURE ID: 4] comprising a plurality of timeslots [FEATURE ID: 6] , each timeslot [FEATURE ID: 4] comprising a plurality of OFDM symbols [FEATURE ID: 7] ; transmit , to the base station , a random access signal [FEATURE ID: 4] followed [TRANSITIVE ID: 8] by a guard period [FEATURE ID: 4] in only a portion [FEATURE ID: 4] of the frequency band , wherein the random access signal includes a sequence [FEATURE ID: 4] associated [TRANSITIVE ID: 9] with the base station , wherein a time duration [FEATURE ID: 4] of a combination [FEATURE ID: 10] of the random access signal and the guard period is greater than a time duration of at least one of the plurality of OFDM symbols ; and a receiver [FEATURE ID: 1] configured to receive , from the base station , a response message . 2 . The mobile station of claim [FEATURE ID: 11] 1 , wherein : the receiver is configured to determine if the response message identifies the sequence associated with the base station in the random access signal ; and on a condition that the response message identifies the sequence associated with the base station in the random access signal , the transmitter is configured to transmit a second uplink signal [FEATURE ID: 4] . 3 . The mobile station of claim 2 , wherein the response message includes power adjustment information and wherein the transmitter is configured to transmit the second uplink signal according to the power adjustment information . 4 . The mobile station of claim 1 , wherein the portion of the frequency band used for transmission of the random access signal does not include control channels [FEATURE ID: 12] . 5 . The mobile station of claim 1 , wherein the response message includes a mobile station identifier [FEATURE ID: 4] assigned to the mobile station . 6 . The mobile station of claim 1 , wherein the time duration of the combination of the random access signal and the guard period is greater than a time duration of at least two of the plurality of OFDM symbols . 7 . The mobile station of claim 1 , wherein the frequency band includes an outer portion and a center portion , wherein the portion of the frequency band for the random access signal is in the center portion and uplink control signals [FEATURE ID: 6] are sent in the outer portion . 8 . The mobile station of claim 1 , wherein the random access signal is a spread spectrum signal [FEATURE ID: 4] . 9 . The mobile station of claim 1 , wherein : the receiver is further configured to receive broadcast information [FEATURE ID: 7] from the base station , the broadcast information indicating at least one sequence associated with the base station for use [FEATURE ID: 13] in producing the random access signal . 10 . The mobile station of claim 1 , wherein the transmitter includes an OFDM transmitter signal processing circuit comprising : a serial [FEATURE ID: 14] |
1 . A MIMO - OFDM transmitter [FEATURE ID: 1] adapted [TRANSITIVE ID: 2] to transmit [TRANSITIVE ID: 3] a header symbol format [FEATURE ID: 4] in which sub-carriers [FEATURE ID: 6] of a header OFDM symbol [FEATURE ID: 4] are divided into a non-contiguous set [FEATURE ID: 10] of sub-carriers for each of a plurality of antennas [FEATURE ID: 6] , with each antenna [FEATURE ID: 1] transmitting [TRANSITIVE ID: 13] 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: 11] 1 wherein there are N antennas and a different set [FEATURE ID: 5] of sub-carriers separated [TRANSITIVE ID: 8] by N sub-carriers is assigned [TRANSITIVE ID: 9] to each of the plurality of antennas . 3 . A transmitter according to claim 1 wherein the header symbols [FEATURE ID: 4] contain a multiplexed dedicated pilot channel [FEATURE ID: 4] on dedicated pilot channel sub-carriers [FEATURE ID: 12] and common synchronization channel [FEATURE ID: 7] on common synchronization channel sub-carriers [FEATURE ID: 6] for each of the plurality of antennas . 4 . A transmitter according to claim 3 wherein the header OFDM symbols [FEATURE ID: 4] further contain multiplexed broadcasting sub-carriers [FEATURE ID: 12] for each of the plurality of antennas . 5 . A transmitter according to claim 1 , adapted to transmit a preamble [FEATURE ID: 4] having a prefix [FEATURE ID: 4] , followed by two identical OFDM symbols [FEATURE ID: 6] having said header OFDM symbol format [FEATURE ID: 4] . 6 . A transmitter according to claim 5 wherein the prefix is a cyclic extension [FEATURE ID: 4] of the two identical OFDM symbols . 7 . A transmitter according to claim 3 wherein the pilot channel sub-carriers [FEATURE ID: 6] have a BTS specific [FEATURE ID: 14] mapped complex sequence [FEATURE ID: 4] allowing efficient BTS identification [FEATURE ID: 13] . 8 . A transmitter according to any one of claims 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: 4] 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 for each transmit antenna of one transmitter , but which is common [FEATURE ID: 9] for respective [FEATURE ID: 9] |
| Targeted Patent: Patent: US10833908B2 Filed: 2004-01-29 Issued: 2020-11-10 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] mobile station, transmitter, base station, signal | system, station, device, network, terminal, communication, radio | [FEATURE ID: 1] radio communication system, radio communication control terminal |
| [TRANSITIVE ID: 2] comprising | wherein, containing, incorporating, of, featuring, using, involving | [TRANSITIVE ID: 2] comprising |
| [FEATURE ID: 3] first uplink signal, frame format, timeslot, random access signal, portion, sequence, mobile station identifier, serial | symbol, preamble, signal, frequency, burst, channel, frame | [FEATURE ID: 3] synchronization, code sequence, second transmission, code, data, frame structure, timer means, transmission timing, sequence code, Gold code |
| [FEATURE ID: 4] frequency band, combination | period, portion, time, unit, frequency, sequence, multiple | [FEATURE ID: 4] number, symbol |
| [FEATURE ID: 5] orthogonal frequency division multiplexing | orthogonal, fm, of, amplitude modulation, orthogonally modulated | [FEATURE ID: 5] orthogonal frequency division multiplexing |
| [FEATURE ID: 6] OFDM | of, amc, od, ff, um, orthogonal, ism | [FEATURE ID: 6] OFDM |
| [TRANSITIVE ID: 7] utilizes, includes, identifies | has, contains, incorporates, defines, carries, specifies, indicates | [TRANSITIVE ID: 7] includes |
| [FEATURE ID: 8] timeslots | blocks, cells, intervals, antennas, carriers, slots, users | [FEATURE ID: 8] symbols, frames, sub-carriers |
| [FEATURE ID: 9] OFDM symbols, control channels, uplink control signals, broadcast information | data, transmissions, symbols, information, tones, carriers, frames | [FEATURE ID: 9] radio communication |
| [FEATURE ID: 10] guard period | mask, period, delay, cycle, margin, factor, prefix | [FEATURE ID: 10] reference, length packet |
| [FEATURE ID: 11] time duration | delay, length, time, cycle | [FEATURE ID: 11] timing |
| [FEATURE ID: 12] receiver | circuit, device, terminal, unit, mean, apparatus, section | [FEATURE ID: 12] means, means |
| [FEATURE ID: 13] claim | statement, claimed, clam, embodiment, item, requirement, aspect | [FEATURE ID: 13] claim |
| [FEATURE ID: 14] second uplink signal, spread spectrum signal | sequence, code, signal, chip, preamble, packet, transmission | [FEATURE ID: 14] code generating |
| [FEATURE ID: 15] power adjustment information, transmission | the, modulation, data, information, signaling, reception, transfer | [FEATURE ID: 15] data transmission |
| [FEATURE ID: 16] use | transmission, transmitting, communication, obtaining, reception, processing, detection | [FEATURE ID: 16] receiving, synchronization acquisition, detecting, TDMA time division multiple access |
| 1 . A mobile station [FEATURE ID: 1] comprising [TRANSITIVE ID: 2] : a transmitter [FEATURE ID: 1] configured to : transmit , to a base station [FEATURE ID: 1] , a first uplink signal [FEATURE ID: 3] within a frequency band [FEATURE ID: 4] , wherein the first uplink signal is an orthogonal frequency division multiplexing [FEATURE ID: 5] ( OFDM [FEATURE ID: 6] ) signal [FEATURE ID: 1] and utilizes [TRANSITIVE ID: 7] a frame format [FEATURE ID: 3] comprising a plurality of timeslots [FEATURE ID: 8] , each timeslot [FEATURE ID: 3] comprising a plurality of OFDM symbols [FEATURE ID: 9] ; transmit , to the base station , a random access signal [FEATURE ID: 3] followed by a guard period [FEATURE ID: 10] in only a portion [FEATURE ID: 3] of the frequency band , wherein the random access signal includes [TRANSITIVE ID: 7] a sequence [FEATURE ID: 3] associated with the base station , wherein a time duration [FEATURE ID: 11] of a combination [FEATURE ID: 4] of the random access signal and the guard period is greater than a time duration of at least one of the plurality of OFDM symbols ; and a receiver [FEATURE ID: 12] configured to receive , from the base station , a response message . 2 . The mobile station of claim [FEATURE ID: 13] 1 , wherein : the receiver is configured to determine if the response message identifies [TRANSITIVE ID: 7] the sequence associated with the base station in the random access signal ; and on a condition that the response message identifies the sequence associated with the base station in the random access signal , the transmitter is configured to transmit a second uplink signal [FEATURE ID: 14] . 3 . The mobile station of claim 2 , wherein the response message includes power adjustment information [FEATURE ID: 15] and wherein the transmitter is configured to transmit the second uplink signal according to the power adjustment information . 4 . The mobile station of claim 1 , wherein the portion of the frequency band used for transmission [FEATURE ID: 15] of the random access signal does not include control channels [FEATURE ID: 9] . 5 . The mobile station of claim 1 , wherein the response message includes a mobile station identifier [FEATURE ID: 3] assigned to the mobile station . 6 . The mobile station of claim 1 , wherein the time duration of the combination of the random access signal and the guard period is greater than a time duration of at least two of the plurality of OFDM symbols . 7 . The mobile station of claim 1 , wherein the frequency band includes an outer portion and a center portion , wherein the portion of the frequency band for the random access signal is in the center portion and uplink control signals [FEATURE ID: 9] are sent in the outer portion . 8 . The mobile station of claim 1 , wherein the random access signal is a spread spectrum signal [FEATURE ID: 14] . 9 . The mobile station of claim 1 , wherein : the receiver is further configured to receive broadcast information [FEATURE ID: 9] from the base station , the broadcast information indicating at least one sequence associated with the base station for use [FEATURE ID: 16] in producing the random access signal . 10 . The mobile station of claim 1 , wherein the transmitter includes an OFDM transmitter signal processing circuit comprising : a serial [FEATURE ID: 3] |
1 . A radio communication system [FEATURE ID: 1] comprising [TRANSITIVE ID: 2] : a plurality of radio communication terminals for data communication ; and a radio communication control terminal [FEATURE ID: 1] for controlling radio communication [FEATURE ID: 9] , wherein said radio communication control terminal includes [TRANSITIVE ID: 7] first transmission means [TRANSITIVE ID: 12] for performing data transmission [FEATURE ID: 15] by orthogonal frequency division multiplexing [FEATURE ID: 5] ( OFDM [FEATURE ID: 6] ) , first receiving [TRANSITIVE ID: 16] means [FEATURE ID: 12] for receiving said data transmission by said OFDM , and synchronization [FEATURE ID: 3] - code generating [FEATURE ID: 14] means for generating a code sequence [FEATURE ID: 3] for synchronization acquisition [FEATURE ID: 16] , and wherein each of said plurality of radio communication terminals includes second transmission [FEATURE ID: 3] means for performing said data transmission by said OFDM , second receiving means for receiving said data transmission by said OFDM , synchronization - code [FEATURE ID: 3] detecting [TRANSITIVE ID: 16] means for detecting said code sequence for said synchronization acquisition , and timer means set by said synchronization - code detecting means , wherein data [FEATURE ID: 3] is modulated by said OFDM and multiplexed by TDMA time division multiple access [FEATURE ID: 16] ( TDMA ) with a frame structure [FEATURE ID: 3] having a specified number [FEATURE ID: 4] of symbols [FEATURE ID: 8] between each of said plurality of radio communication terminals and said radio communication control terminal , said radio communication control terminal transmits said code sequence for said synchronization acquisition to said plurality of radio communication terminals in each of a plurality of frames [FEATURE ID: 8] , 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: 3] according to a receiving timing [FEATURE ID: 11] of said code sequence for said synchronization acquisition , and sets a transmission timing [FEATURE ID: 3] and said receiving timing with said timer means used as a reference [FEATURE ID: 10] . 2 . The radio communication system as set forth in claim [FEATURE ID: 13] 1 , wherein said code sequence for said synchronization acquisition corresponds to one symbol [FEATURE ID: 4] 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: 10] . 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: 3] . 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: 3] . 6 . The radio communication system as set forth in claim 1 , wherein each of a plurality of sub-carriers [FEATURE ID: 8] |
| Targeted Patent: Patent: US10833908B2 Filed: 2004-01-29 Issued: 2020-11-10 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] mobile station, base station, frequency band, timeslot, portion, cyclic prefix addition circuit | transceiver, channel, transmitter, system, device, processor, receiver | [FEATURE ID: 1] communication device, burst, single element transmitter, frequency domain |
| [TRANSITIVE ID: 2] comprising, utilizes | having, including, comprises, with, of, describing, compromising | [TRANSITIVE ID: 2] comprising, being |
| [FEATURE ID: 3] transmitter | station, unit, processor, device | [FEATURE ID: 3] antenna |
| [TRANSITIVE ID: 4] configured | operable, adapted, designed, used | [TRANSITIVE ID: 4] arranged |
| [FEATURE ID: 5] first uplink signal, signal, frame format, random access signal, guard period, sequence, time duration, second uplink signal, spread spectrum signal, serial, parallel converter | preamble, symbol, burst, pilot, transmission, code, slot | [FEATURE ID: 5] replica, signal sequence, training sequence y n, channel, channel impulse response, cyclic prefix, carrier |
| [FEATURE ID: 6] timeslots, uplink control signals, broadcast information | tones, pilots, blocks, bursts, symbols, transmissions, data | [FEATURE ID: 6] training sequence frequency bins, training sequence bursts, training sequences |
| [FEATURE ID: 7] OFDM symbols | signals, branches, cells, components, antennas, elements, segments | [FEATURE ID: 7] channels, multiple elements, matrix operations, stations |
| [FEATURE ID: 8] combination, mobile station identifier | group, matrix, sequence, pair, conjugate, composition, profile | [FEATURE ID: 8] multiplicity, composite frequency response, set |
| [FEATURE ID: 9] receiver | detector, controller, demodulator, channel, transmitter, decoder | [FEATURE ID: 9] time domain |
| [TRANSITIVE ID: 10] receive | extract, derive, obtain, determine, identify | [TRANSITIVE ID: 10] generate |
| [FEATURE ID: 11] claim | statement, the claim, embodiment, item, previous claim, requirement, aspect | [FEATURE ID: 11] claim |
| [FEATURE ID: 12] control channels | noise, data, null, pilot, channels, interference, zero | [FEATURE ID: 12] blank, channel impulse response H |
| 1 . A mobile station [FEATURE ID: 1] comprising [TRANSITIVE ID: 2] : a transmitter [FEATURE ID: 3] configured [TRANSITIVE ID: 4] to : transmit , to a base station [FEATURE ID: 1] , a first uplink signal [FEATURE ID: 5] within a frequency band [FEATURE ID: 1] , wherein the first uplink signal is an orthogonal frequency division multiplexing ( OFDM ) signal [FEATURE ID: 5] and utilizes [TRANSITIVE ID: 2] a frame format [FEATURE ID: 5] comprising a plurality of timeslots [FEATURE ID: 6] , each timeslot [FEATURE ID: 1] comprising a plurality of OFDM symbols [FEATURE ID: 7] ; transmit , to the base station , a random access signal [FEATURE ID: 5] followed by a guard period [FEATURE ID: 5] in only a portion [FEATURE ID: 1] of the frequency band , wherein the random access signal includes a sequence [FEATURE ID: 5] associated with the base station , wherein a time duration [FEATURE ID: 5] of a combination [FEATURE ID: 8] of the random access signal and the guard period is greater than a time duration of at least one of the plurality of OFDM symbols ; and a receiver [FEATURE ID: 9] configured to receive [TRANSITIVE ID: 10] , from the base station , a response message . 2 . The mobile station of claim [FEATURE ID: 11] 1 , wherein : the receiver is configured to determine if the response message identifies the sequence associated with the base station in the random access signal ; and on a condition that the response message identifies the sequence associated with the base station in the random access signal , the transmitter is configured to transmit a second uplink signal [FEATURE ID: 5] . 3 . The mobile station of claim 2 , wherein the response message includes power adjustment information and wherein the transmitter is configured to transmit the second uplink signal according to the power adjustment information . 4 . The mobile station of claim 1 , wherein the portion of the frequency band used for transmission of the random access signal does not include control channels [FEATURE ID: 12] . 5 . The mobile station of claim 1 , wherein the response message includes a mobile station identifier [FEATURE ID: 8] assigned to the mobile station . 6 . The mobile station of claim 1 , wherein the time duration of the combination of the random access signal and the guard period is greater than a time duration of at least two of the plurality of OFDM symbols . 7 . The mobile station of claim 1 , wherein the frequency band includes an outer portion and a center portion , wherein the portion of the frequency band for the random access signal is in the center portion and uplink control signals [FEATURE ID: 6] are sent in the outer portion . 8 . The mobile station of claim 1 , wherein the random access signal is a spread spectrum signal [FEATURE ID: 5] . 9 . The mobile station of claim 1 , wherein : the receiver is further configured to receive broadcast information [FEATURE ID: 6] from the base station , the broadcast information indicating at least one sequence associated with the base station for use in producing the random access signal . 10 . The mobile station of claim 1 , wherein the transmitter includes an OFDM transmitter signal processing circuit comprising : a serial [FEATURE ID: 5] to parallel converter [FEATURE ID: 5] , an inverse Fourier transform , and a cyclic prefix addition circuit [FEATURE ID: 1] |
1 . A method of determining channel impulse responses of a plurality of channels [FEATURE ID: 7] to a communication device [FEATURE ID: 1] , the method comprising [TRANSITIVE ID: 2] : performing transform operations on both a replica [FEATURE ID: 5] of a signal sequence [FEATURE ID: 5] s n and a received training sequence y n [FEATURE ID: 5] received by the communication device in at least one burst [FEATURE ID: 1] , the received training sequence y n being [TRANSITIVE ID: 2] the signal sequence as received through a channel [FEATURE ID: 5] , the transform operations arranged [TRANSITIVE ID: 4] to generate [TRANSITIVE ID: 10] a multiplicity [FEATURE ID: 8] of signal sequence frequency bins and a multiplicity of training sequence frequency bins [FEATURE ID: 6] ; 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: 8] for the channel , the composite frequency response allowing , in the time domain [FEATURE ID: 9] , generation of the channel impulse response [FEATURE ID: 5] for the channel . 2 . The method according to claim [FEATURE ID: 11] 1 , further comprising : separating training sequence bursts [FEATURE ID: 6] emanating from a single element transmitter [FEATURE ID: 1] by one of a cyclic prefix [FEATURE ID: 5] and a blank [FEATURE ID: 12] ( zero ) carrier [FEATURE ID: 5] . 3 . The method according to claim 1 , wherein multiple Steiner codes are transmitted as training sequences [FEATURE ID: 6] , the multiple Steiner codes sent from multiple transmit elements in multiple training bursts . 4 . The method according to claim 3 , wherein the multiple Steiner codes are transmitted from multiple elements [FEATURE ID: 7] of a base station transmit antenna [FEATURE ID: 3] . 5 . The method according to claim 1 , further comprising using a set [FEATURE ID: 8] of matrix operations [FEATURE ID: 7] in the frequency domain [FEATURE ID: 1] to resolve channels to the communication device from multiple transmitting stations [FEATURE ID: 7] , the matrix operations providing solvable linear equations for the channel impulse response H [FEATURE ID: 12] |
| Targeted Patent: Patent: US10833908B2 Filed: 2004-01-29 Issued: 2020-11-10 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] mobile station, transmitter, base station, frequency band, signal, receiver | system, transceiver, radio, network, device, channel, station | [FEATURE ID: 1] wireless communications system, terminal, communications medium, sleep mode |
| [TRANSITIVE ID: 2] comprising, utilizes, includes | using, having, with, incorporating, of, comprises, involving | [TRANSITIVE ID: 2] including, representing, comprising |
| [FEATURE ID: 3] first uplink signal, timeslot, random access signal, guard period, portion, combination, second uplink signal, mobile station identifier, spread spectrum signal, serial | symbol, sequence, preamble, code, message, carrier, burst | [FEATURE ID: 3] common synchronization code, received, signal, combination, synchronization signal, time interval, representation, channel, synchronization code, cell, traffic channel, communications signal, respective synchronization signal, portion, common synchronization signal, pilot channel |
| [FEATURE ID: 4] frame format | transmission, frequency, time, duration | [FEATURE ID: 4] timing |
| [FEATURE ID: 5] timeslots, OFDM symbols, uplink control signals, broadcast information | resources, carriers, channels, frames, signals, pilots, symbols | [FEATURE ID: 5] cells, synchronization signals, candidate cells |
| [TRANSITIVE ID: 6] followed | modulated, separated, defined, spaced | [TRANSITIVE ID: 6] encoded |
| [FEATURE ID: 7] sequence | series, number, signature, pattern | [FEATURE ID: 7] set |
| [FEATURE ID: 8] time duration | magnitude, portion, part, value | [FEATURE ID: 8] component |
| [FEATURE ID: 9] claim | embodiment, clair, paragraph, item, statement, case, requirement | [FEATURE ID: 9] claim |
| [FEATURE ID: 10] control channels | information, data, traffic, channels | [FEATURE ID: 10] communications |
| [FEATURE ID: 11] use | decoding, using, identifying, utilizing | [FEATURE ID: 11] processing |
| [FEATURE ID: 12] inverse Fourier | impedance, envelope, amplitude, inverse, output | [FEATURE ID: 12] estimate |
| 1 . A mobile station [FEATURE ID: 1] comprising [TRANSITIVE ID: 2] : a transmitter [FEATURE ID: 1] configured to : transmit , to a base station [FEATURE ID: 1] , a first uplink signal [FEATURE ID: 3] within a frequency band [FEATURE ID: 1] , wherein the first uplink signal is an orthogonal frequency division multiplexing ( OFDM ) signal [FEATURE ID: 1] and utilizes [TRANSITIVE ID: 2] a frame format [FEATURE ID: 4] comprising a plurality of timeslots [FEATURE ID: 5] , each timeslot [FEATURE ID: 3] comprising a plurality of OFDM symbols [FEATURE ID: 5] ; transmit , to the base station , a random access signal [FEATURE ID: 3] followed [TRANSITIVE ID: 6] by a guard period [FEATURE ID: 3] in only a portion [FEATURE ID: 3] of the frequency band , wherein the random access signal includes [TRANSITIVE ID: 2] a sequence [FEATURE ID: 7] associated with the base station , wherein a time duration [FEATURE ID: 8] of a combination [FEATURE ID: 3] of the random access signal and the guard period is greater than a time duration of at least one of the plurality of OFDM symbols ; and a receiver [FEATURE ID: 1] configured to receive , from the base station , a response message . 2 . The mobile station of claim [FEATURE ID: 9] 1 , wherein : the receiver is configured to determine if the response message identifies the sequence associated with the base station in the random access signal ; and on a condition that the response message identifies the sequence associated with the base station in the random access signal , the transmitter is configured to transmit a second uplink signal [FEATURE ID: 3] . 3 . The mobile station of claim 2 , wherein the response message includes power adjustment information and wherein the transmitter is configured to transmit the second uplink signal according to the power adjustment information . 4 . The mobile station of claim 1 , wherein the portion of the frequency band used for transmission of the random access signal does not include control channels [FEATURE ID: 10] . 5 . The mobile station of claim 1 , wherein the response message includes a mobile station identifier [FEATURE ID: 3] assigned to the mobile station . 6 . The mobile station of claim 1 , wherein the time duration of the combination of the random access signal and the guard period is greater than a time duration of at least two of the plurality of OFDM symbols . 7 . The mobile station of claim 1 , wherein the frequency band includes an outer portion and a center portion , wherein the portion of the frequency band for the random access signal is in the center portion and uplink control signals [FEATURE ID: 5] are sent in the outer portion . 8 . The mobile station of claim 1 , wherein the random access signal is a spread spectrum signal [FEATURE ID: 3] . 9 . The mobile station of claim 1 , wherein : the receiver is further configured to receive broadcast information [FEATURE ID: 5] from the base station , the broadcast information indicating at least one sequence associated with the base station for use [FEATURE ID: 11] in producing the random access signal . 10 . The mobile station of claim 1 , wherein the transmitter includes an OFDM transmitter signal processing circuit comprising : a serial [FEATURE ID: 3] to parallel converter , an inverse Fourier [FEATURE ID: 12] |
1 . In a wireless communications system [FEATURE ID: 1] including [TRANSITIVE ID: 2] a plurality of cells [FEATURE ID: 5] in which synchronization signals [FEATURE ID: 5] transmitted in the cells are encoded [TRANSITIVE ID: 6] according to a common synchronization code [FEATURE ID: 3] , a method of processing [TRANSITIVE ID: 11] a received [TRANSITIVE ID: 3] communications [FEATURE ID: 10] signal [TRANSITIVE ID: 3] representing [TRANSITIVE ID: 2] a combination [FEATURE ID: 3] of synchronization signals comprising [TRANSITIVE ID: 2] the steps of : correlating the received communications signal with the common synchronization code to produce a synchronization detection signal ; canceling a component [FEATURE ID: 8] of the synchronization detection signal associated with a known synchronization signal [FEATURE ID: 3] from the synchronization detection signal to produce an interference - canceled synchronization detection signal ; and determining timing [FEATURE ID: 4] of a synchronization signal from the interference - canceled synchronization detection signal . 2 . A method according to claim [FEATURE ID: 9] 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: 3] ; 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 [FEATURE ID: 12] of a channel [FEATURE ID: 3] 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: 3] . 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 ; 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: 3] . 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: 3] . 9 . A method according to claim 7 : wherein said step of canceling is preceded by the step of identifying a set [FEATURE ID: 7] of synchronization signals associated with a set of candidate cells [FEATURE ID: 5] ; 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: 3] 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: 3] 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 to the terminal awakening from a sleep mode [FEATURE ID: 1] |
| Targeted Patent: Patent: US10833908B2 Filed: 2004-01-29 Issued: 2020-11-10 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] mobile station, base station, cyclic prefix addition circuit | transmitter, transceiver, receiver, controller, modem, memory, database | [FEATURE ID: 1] base station, system, DSSS transmitter, DSSS receiver, second antenna |
| [TRANSITIVE ID: 2] comprising | defining, of, containing, including, comprises, with, implementing | [TRANSITIVE ID: 2] comprising, having |
| [FEATURE ID: 3] transmitter | modulator, receiver, combiner, processor, device, controller, unit | [FEATURE ID: 3] first frequency duplexer, encoder, FEC encoder |
| [TRANSITIVE ID: 4] transmit | provide, communicate, output, direct, transmission, receive, modulate | [TRANSITIVE ID: 4] couple, output OFDM signals |
| [FEATURE ID: 5] orthogonal frequency division multiplexing | of, fm, optical, interferometry, modulated, orthogonally modulated | [FEATURE ID: 5] orthogonal frequency domain multiplexing |
| [FEATURE ID: 6] OFDM | of, amc, orthogonal, od, ff, cf, um | [FEATURE ID: 6] OFDM |
| [TRANSITIVE ID: 7] utilizes, includes, identifies | has, defines, represents, indicates, contains, uses, incorporates | [TRANSITIVE ID: 7] comprises |
| [FEATURE ID: 8] timeslots, control channels, uplink control signals | symbols, channels, carriers, tones, transmissions, information, resources | [FEATURE ID: 8] signals, outputs |
| [FEATURE ID: 9] OFDM symbols | symbols, data, tones, frames, codes, channels, transmissions | [FEATURE ID: 9] signals |
| [FEATURE ID: 10] receiver | transmitter, coupler, controller, mixer, transceiver, circuit, circulator | [FEATURE ID: 10] first switch, second switch, second frequency duplexer, modulator |
| [FEATURE ID: 11] claim | statement, the claim, clam, embodiment, item, case, requirement | [FEATURE ID: 11] claim |
| [FEATURE ID: 12] broadcast information | data, signals, information, communication, signaling, messages | [FEATURE ID: 12] DSSS signals |
| [FEATURE ID: 13] use | sending, reception, processing, transmitting, receipt | [FEATURE ID: 13] receiving |
| [FEATURE ID: 14] OFDM transmitter signal processing circuit | input, adder, expander, inverse, equalizer, oscillator, array | [FEATURE ID: 14] output, inverse Fast Fourier Transform |
| [FEATURE ID: 15] serial | code, single, data, reverse, signal | [FEATURE ID: 15] direct |
| 1 . A mobile station [FEATURE ID: 1] comprising [TRANSITIVE ID: 2] : a transmitter [FEATURE ID: 3] configured to : transmit [TRANSITIVE ID: 4] , to a base station [FEATURE ID: 1] , a first uplink signal within a frequency band , wherein the first uplink signal is an orthogonal frequency division multiplexing [FEATURE ID: 5] ( OFDM [FEATURE ID: 6] ) signal and utilizes [TRANSITIVE ID: 7] a frame format comprising a plurality of timeslots [FEATURE ID: 8] , each timeslot comprising a plurality of OFDM symbols [FEATURE ID: 9] ; transmit , to the base station , a random access signal followed by a guard period in only a portion of the frequency band , wherein the random access signal includes [TRANSITIVE ID: 7] a sequence associated with the base station , wherein a time duration of a combination of the random access signal and the guard period is greater than a time duration of at least one of the plurality of OFDM symbols ; and a receiver [FEATURE ID: 10] configured to receive , from the base station , a response message . 2 . The mobile station of claim [FEATURE ID: 11] 1 , wherein : the receiver is configured to determine if the response message identifies [TRANSITIVE ID: 7] the sequence associated with the base station in the random access signal ; and on a condition that the response message identifies the sequence associated with the base station in the random access signal , the transmitter is configured to transmit a second uplink signal . 3 . The mobile station of claim 2 , wherein the response message includes power adjustment information and wherein the transmitter is configured to transmit the second uplink signal according to the power adjustment information . 4 . The mobile station of claim 1 , wherein the portion of the frequency band used for transmission of the random access signal does not include control channels [FEATURE ID: 8] . 5 . The mobile station of claim 1 , wherein the response message includes a mobile station identifier assigned to the mobile station . 6 . The mobile station of claim 1 , wherein the time duration of the combination of the random access signal and the guard period is greater than a time duration of at least two of the plurality of OFDM symbols . 7 . The mobile station of claim 1 , wherein the frequency band includes an outer portion and a center portion , wherein the portion of the frequency band for the random access signal is in the center portion and uplink control signals [FEATURE ID: 8] are sent in the outer portion . 8 . The mobile station of claim 1 , wherein the random access signal is a spread spectrum signal . 9 . The mobile station of claim 1 , wherein : the receiver is further configured to receive broadcast information [FEATURE ID: 12] from the base station , the broadcast information indicating at least one sequence associated with the base station for use [FEATURE ID: 13] in producing the random access signal . 10 . The mobile station of claim 1 , wherein the transmitter includes an OFDM transmitter signal processing circuit [FEATURE ID: 14] comprising : a serial [FEATURE ID: 15] to parallel converter , an inverse Fourier transform , and a cyclic prefix addition circuit [FEATURE ID: 1] |
1 . A method for communicating with at least one subscriber , the method comprising [TRANSITIVE ID: 2] : transmitting orthogonal frequency domain multiplexing [FEATURE ID: 5] ( OFDM [FEATURE ID: 6] ) signals [TRANSITIVE ID: 8] to the at least one subscriber ; and receiving [TRANSITIVE ID: 13] direct [FEATURE ID: 15] - sequence spread spectrum ( DSSS ) signals [FEATURE ID: 9] from the at least one subscriber . 2 . The method defined in claim [FEATURE ID: 11] 1 wherein receiving the DSSS signals [FEATURE ID: 12] comprises [TRANSITIVE ID: 7] receiving multiple code division multiple access ( CDMA ) signals from a plurality of subscribers . 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: 2] 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: 1] , an OFDM transmitter , a second antenna [FEATURE ID: 1] coupled to the DSSS receiver and the OFDM transmitter . 6 . The system defined in claim 5 further comprising : a first switch [FEATURE ID: 10] to couple [TRANSITIVE ID: 4] to the DSSS transmitter and the OFDM receiver to the first antenna ; and a second switch [FEATURE ID: 10] 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 [FEATURE ID: 3] to couple to the DSSS transmitter and the OFDM receiver to the first antenna ; and a second frequency duplexer [FEATURE ID: 10] 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 ( FEC ) encoder [FEATURE ID: 3] , an interleaver coupled to an output [FEATURE ID: 14] of the FEC encoder [FEATURE ID: 3] , and a modulator [FEATURE ID: 10] coupled to an output of the interleaver ; and an inverse Fast Fourier Transform [FEATURE ID: 14] ( IFFT ) coupled to receive outputs [FEATURE ID: 8] from modulators in the plurality of processing paths and to output OFDM signals [FEATURE ID: 4] |
| Targeted Patent: Patent: US10833908B2 Filed: 2004-01-29 Issued: 2020-11-10 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] mobile station, base station, signal, frame format, random access signal, portion, sequence, receiver, mobile station identifier, spread spectrum signal | preamble, slot, transmission, transceiver, message, sector, pilot | [FEATURE ID: 1] downlink mobile radio channel, code division multiple access system, mobile radio receiver, further synchronization channel |
| [TRANSITIVE ID: 2] comprising | by, with, including, incorporating, have, using, containing | [TRANSITIVE ID: 2] comprises, having |
| [FEATURE ID: 3] transmitter, serial | code, single, time, receiver, device, system, transmission | [FEATURE ID: 3] common synchronization channel |
| [TRANSITIVE ID: 4] configured | implemented, adapted, used, designed, arranged, formed, suitable | [TRANSITIVE ID: 4] provided |
| [FEATURE ID: 5] first uplink signal, guard period, time duration, second uplink signal | symbol, preamble, signal, data, pilot, transmission, subframe | [FEATURE ID: 5] time slot, pilot symbol, pilot symbol sequence, previous pilot symbol, previous pilot symbol sequence, previous time slot, current pilot symbol, current pilot symbol sequence, current time slot, last pilot symbol, first pilot symbol |
| [FEATURE ID: 6] frequency band, condition | hypothesis, time, channel, basis, decision, cell, slot | [FEATURE ID: 6] case |
| [TRANSITIVE ID: 7] utilizes, includes, identifies | contains, incorporates, carries, uses, represents, specifies, indicates | [TRANSITIVE ID: 7] has |
| [FEATURE ID: 8] timeslots, power adjustment information | symbols, channels, periods, positions, sequences, values, intervals | [FEATURE ID: 8] mobile radio receivers, points, delay times, information |
| [FEATURE ID: 9] timeslot | times, section, duration, interval, symbol | [FEATURE ID: 9] position |
| [FEATURE ID: 10] OFDM symbols, broadcast information | signals, data, information, symbols, codes, transmissions, frames | [FEATURE ID: 10] mobile radio channel impulse responses, sequences, pilot symbols, further sequences |
| [FEATURE ID: 11] claim | statement, claimed, embodiment, conclusion, item, requirement, previous claim | [FEATURE ID: 11] claim |
| [FEATURE ID: 12] transmission | communications, use, reception, signaling | [FEATURE ID: 12] synchronization |
| [FEATURE ID: 13] control channels | traffic, speech, decoding, symbols, transmissions, demodulation, tracking | [FEATURE ID: 13] slot synchronization, data |
| [FEATURE ID: 14] uplink control signals | measurements, information, symbols, data | [FEATURE ID: 14] further symbols |
| [FEATURE ID: 15] further | additionally, only, not, also, particularly, successively, exclusively | [FEATURE ID: 15] transmitted, buffer |
| [FEATURE ID: 16] use | processing, transmitting, decoding, identifying | [FEATURE ID: 16] estimating |
| 1 . A mobile station [FEATURE ID: 1] comprising [TRANSITIVE ID: 2] : a transmitter [FEATURE ID: 3] configured [TRANSITIVE ID: 4] to : transmit , to a base station [FEATURE ID: 1] , a first uplink signal [FEATURE ID: 5] within a frequency band [FEATURE ID: 6] , wherein the first uplink signal is an orthogonal frequency division multiplexing ( OFDM ) signal [FEATURE ID: 1] and utilizes [TRANSITIVE ID: 7] a frame format [FEATURE ID: 1] comprising a plurality of timeslots [FEATURE ID: 8] , each timeslot [FEATURE ID: 9] comprising a plurality of OFDM symbols [FEATURE ID: 10] ; transmit , to the base station , a random access signal [FEATURE ID: 1] followed by a guard period [FEATURE ID: 5] in only a portion [FEATURE ID: 1] of the frequency band , wherein the random access signal includes [TRANSITIVE ID: 7] a sequence [FEATURE ID: 1] associated with the base station , wherein a time duration [FEATURE ID: 5] of a combination of the random access signal and the guard period is greater than a time duration of at least one of the plurality of OFDM symbols ; and a receiver [FEATURE ID: 1] configured to receive , from the base station , a response message . 2 . The mobile station of claim [FEATURE ID: 11] 1 , wherein : the receiver is configured to determine if the response message identifies [TRANSITIVE ID: 7] the sequence associated with the base station in the random access signal ; and on a condition [FEATURE ID: 6] that the response message identifies the sequence associated with the base station in the random access signal , the transmitter is configured to transmit a second uplink signal [FEATURE ID: 5] . 3 . The mobile station of claim 2 , wherein the response message includes power adjustment information [FEATURE ID: 8] and wherein the transmitter is configured to transmit the second uplink signal according to the power adjustment information . 4 . The mobile station of claim 1 , wherein the portion of the frequency band used for transmission [FEATURE ID: 12] of the random access signal does not include control channels [FEATURE ID: 13] . 5 . The mobile station of claim 1 , wherein the response message includes a mobile station identifier [FEATURE ID: 1] assigned to the mobile station . 6 . The mobile station of claim 1 , wherein the time duration of the combination of the random access signal and the guard period is greater than a time duration of at least two of the plurality of OFDM symbols . 7 . The mobile station of claim 1 , wherein the frequency band includes an outer portion and a center portion , wherein the portion of the frequency band for the random access signal is in the center portion and uplink control signals [FEATURE ID: 14] are sent in the outer portion . 8 . The mobile station of claim 1 , wherein the random access signal is a spread spectrum signal [FEATURE ID: 1] . 9 . The mobile station of claim 1 , wherein : the receiver is further [FEATURE ID: 15] configured to receive broadcast information [FEATURE ID: 10] from the base station , the broadcast information indicating at least one sequence associated with the base station for use [FEATURE ID: 16] in producing the random access signal . 10 . The mobile station of claim 1 , wherein the transmitter includes an OFDM transmitter signal processing circuit comprising : a serial [FEATURE ID: 3] |
1 . A method for estimating [TRANSITIVE ID: 16] mobile radio channel impulse responses [FEATURE ID: 10] in a downlink mobile radio channel [FEATURE ID: 1] in a code division multiple access system [FEATURE ID: 1] that has [TRANSITIVE ID: 7] a common synchronization channel [FEATURE ID: 3] provided [TRANSITIVE ID: 4] for synchronization [FEATURE ID: 12] of each mobile radio receiver [FEATURE ID: 1] , which comprises [TRANSITIVE ID: 2] the steps of : transmitting , via the common synchronization channel , sequences [FEATURE ID: 10] continuously to a plurality of mobile radio receivers [FEATURE ID: 8] , the sequences being known to each of the mobile radio receivers , the sequences transmitted [TRANSITIVE ID: 15] having [TRANSITIVE ID: 2] pilot symbols [FEATURE ID: 10] for identifying the common synchronization channel , and the pilot symbols being transmitted at points [FEATURE ID: 8] which are known to the mobile radio receivers within a time slot [FEATURE ID: 5] ; and evaluating the pilot symbols in the sequences , known to the mobile radio receivers , to jointly estimate delay times [FEATURE ID: 8] 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: 11] 1 , which comprises evaluating the pilot symbols while searching for and identifying the common synchronization channel during slot synchronization [FEATURE ID: 13] . 3 . The method according to claim 1 , which comprises : transmitting further sequences [FEATURE ID: 10] , via a further synchronization channel [FEATURE ID: 1] ; 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: 6] on receiving one of a pilot symbol [FEATURE ID: 5] and a pilot symbol sequence [FEATURE ID: 5] at one of a start of the time slot , an end of the time slot , and any position [FEATURE ID: 9] 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 [FEATURE ID: 5] and a previous pilot symbol sequence [FEATURE ID: 5] received in a previous time slot [FEATURE ID: 5] , and one of a current pilot symbol [FEATURE ID: 5] and a current pilot symbol sequence [FEATURE ID: 5] in a current time slot [FEATURE ID: 5] . 6 . The method according to claim 5 , which comprises using further symbols [FEATURE ID: 14] , which are known in the mobile radio receiver for the prediction or the interpolation . 7 . The method according to claim 5 , which comprises buffer [FEATURE ID: 15] storing data [FEATURE ID: 13] and monitoring information [FEATURE ID: 8] transmitted between a last pilot symbol [FEATURE ID: 5] in the previous time slot and a first pilot symbol [FEATURE ID: 5] |