Having Specific Signaling For Code Synchronization Patents (Class 375/145)
  • Patent number: 8149776
    Abstract: Access to a wireless network is attempted by sending on a random access channel RACH at a first transmit power a first preamble comprising a signature sequence that is randomly selected from a set of signature sequences. After the access attempt from sending the first preamble is determined unsuccessful, access to the wireless network is re-attempted by sending on the RACH at a second transmit power a second preamble comprising a signature sequence, in which the second transmit power is no greater than the first transmit power. Embodiments variously combine different options: the signature sequences of the first and second preambles are each randomly selected separately, or the signature sequence of the first preamble is re-used in the second preamble; the first and second transmit powers are each equal to an initial transmit power, or the second transmit power is the initial power and less than the first transmit power.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: April 3, 2012
    Assignee: Nokia Corporation
    Inventors: Ville O. Steudle, Juho Mikko Oskari Pirskanen, Ladislav Kusnyer, Sami P. Hakala, Jukka T. Vikstedt, Harri Matti Johannes Valio, Markku Juhani Tarkiainen
  • Patent number: 8144747
    Abstract: A wireless communication system. The system comprises transmitter circuitry (BST1), the transmitter circuitry comprising encoder circuitry (50) for transmitting a plurality of frames (FR). Each of the plurality of frames comprises a primary synchronization code (PCS) and a secondary synchronization code (SSC). The encoder circuitry comprises of circuitry (501) for providing the primary synchronization code in response to a first sequence (32). The encoder circuitry further comprises circuitry (502) for providing the secondary synchronization code in response to a second sequence (54) and a third sequence (56). The second sequence is selected from a plurality of sequences. Each of the plurality of sequences is orthogonal with respect to all other sequences in the plurality of sequences. The third sequence comprises a subset of bits from the first sequence.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: March 27, 2012
    Assignee: Texas Instruments Incorporated
    Inventors: Anand G. Dabak, Sundararajan Sriram, Srinath Hosur
  • Patent number: 8135080
    Abstract: A receiver circuit in each branch has an FFT unit that performs Fourier transform on OFDM signals. A slave branch FFT window control unit determines whether an undesired wave is a preceding wave or a delay wave, and notifies a master branch of the result. In response to the notification from the slave branch, a master branch FFT window control unit controls a position of an FFT window that indicates a time range in which Fourier transform is performed on OFDM signals.
    Type: Grant
    Filed: July 29, 2008
    Date of Patent: March 13, 2012
    Assignee: Fujitsu Semiconductor Limited
    Inventors: Naoto Adachi, Makoto Hamaminato
  • Patent number: 8135056
    Abstract: Noise measurements are made within a fraction of a single symbol period of a longest orthogonal code symbol. A control processor identifies an unoccupied code having a spreading factor that is less than a longest spreading factor for the system. A despreader measures symbol energy based on the unoccupied code and a noise estimator generates noise estimations based on the measured symbol energies. The subscriber station uses similar techniques in order to perform channel estimations within a period that is a fraction of a symbol period of a longest-spreading-factor code.
    Type: Grant
    Filed: July 23, 2007
    Date of Patent: March 13, 2012
    Assignee: Qualcomm Incorporated
    Inventors: Da-shan Shiu, Durga Prasad Malladi, Srikrishna Bhashyam
  • Patent number: 8130730
    Abstract: A time division duplex (TDD) user equipment (UE) is configured to synchronize to a TDD base station. The UE includes an antenna, a primary synchronization code matched filter, a first plurality of secondary synchronization code matched filters, a second plurality of secondary synchronization code matched filters, and a processor in communication with the first and second plurality of secondary synchronization code matched filters. The first plurality of secondary synchronization code matched filters determines secondary synchronization codes sent on a first carrier and the second plurality of secondary synchronization code matched filters determines secondary synchronization codes sent on a second carrier. The processor is configured to determine a code group assignment and selected timeslot based upon an analysis of the secondary synchronization codes sent on the first and second carriers.
    Type: Grant
    Filed: July 9, 2009
    Date of Patent: March 6, 2012
    Assignee: InterDigital Technology Corporation
    Inventors: Nadir Sezgin, Fatih Ozluturk
  • Patent number: 8116818
    Abstract: A system and method are provided for improving the performance of a beamforming antenna array in a wireless communications system. A predetermined number of spatial signatures are observed for a communications channel between a base station and a mobile terminal during a predetermined time period. One or more test spatial signatures are generated based on statistical analysis of the observed predetermined number of spatial signatures. A beamforming weight is derived based on the generated test spatial signatures for beamforming by an antenna subsystem of the base station.
    Type: Grant
    Filed: April 4, 2006
    Date of Patent: February 14, 2012
    Assignee: Cisco Technology, Inc.
    Inventors: Hang Jin, John Grabner
  • Patent number: 8098713
    Abstract: An embodiment for wirelessly communicating a signal includes a transmitter generating and transmitting a wireless signal over a wireless communication channel. The wireless signal includes a guard band, data represented within a plurality of data-bearing subcarriers, and a plurality of pilot signals represented within a plurality of pilot subcarriers. In an embodiment, the plurality of pilot signals have variable pilot signal parameters selected from a group of parameters that includes pilot power and pilot spacing with respect to adjacent pilots. An embodiment further includes a receiver receiving a channel-affected version of the wireless signal, and producing a corrected signal by applying corrections to the received signal based on estimated channel perturbations within the received signal, where the estimated channel perturbations are determined based on the plurality of pilot signals. The receiver also produces an output data symbol from the corrected signal.
    Type: Grant
    Filed: April 14, 2008
    Date of Patent: January 17, 2012
    Assignee: General Dynamics C4 Systems
    Inventors: Robert John Baxley, John Eric Kleider, Kelly Anderson
  • Patent number: 8099058
    Abstract: A method for operating an integrated transceiver, comprising coupling an operating transmitter and an operating receiver within the integrated wideband receiver, inputting a signal into the operating transmitter, performing a first conversion of the signal, wherein the signal is converted into a second signal, transmitting the second signal into the operating receiver, performing a second conversion of the signal, wherein the signal is converted into a third signal, transmitting the third signal into the operating transmitter, and adjusting the operating transmitter.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: January 17, 2012
    Assignee: Rockstar Bidco, LP
    Inventors: Bradley John Morris, Edward M. Sich
  • Patent number: 8098754
    Abstract: Allocation of multiple training sequences transmitted in a MIMO timeslot from multiple transmit antenna elements is provided. For example, a method of generating signals in a MIMO timeslot, the method comprising: selecting a first training sequence; preparing a first data payload; generating a first signal including the prepared first data payload and the first training sequence; transmitting the first signal in a MIMO timeslot from a first antenna of a network element; selecting a second training sequence, wherein the second training sequence is different from first training sequence; preparing a second data payload; generating a second signal including the prepared second data payload and the second training sequence; and transmitting the second signal in the MIMO timeslot from a second antenna of the network element.
    Type: Grant
    Filed: May 4, 2005
    Date of Patent: January 17, 2012
    Assignee: Sony Corporation
    Inventors: Vishakan Ponnampalam, Martin W. Beale
  • Patent number: 8077759
    Abstract: A method and an apparatus for new cell identification in a WCDMA network with a given neighbor set are described. Aspects of a system for new cell identification in a WCDMA network with a given neighbor set may include a baseband processor that enables determination of a primary synchronization position and at least one scrambling code based on received configuration information from one or more base stations. The baseband processor may also enable determination of a slot boundary in at least one signal received from the one or more base stations based on the determined primary synchronization position. The system may also include a multipath detector that enables unscrambling of the received at least one signal based on the determined slot boundary and at least a portion of the one or more scrambling codes.
    Type: Grant
    Filed: April 7, 2006
    Date of Patent: December 13, 2011
    Assignee: Broadcom Corporation
    Inventors: Mark Kent, Francis Swarts, Uri Landau
  • Patent number: 8077756
    Abstract: A disclosed signal transmitting method includes the steps of a) categorizing plural digital signals, obtained by performing A/D conversion on plural analog signals consecutively arranged in a time direction, into plural signal groups in an order starting from lower bits of the plural digital signals, b) performing code spreading on the plural digital signals by using a different spread frequency for each signal group and using different spread codes for each bit, c) multiplexing the spread digital signals, and d) transmitting the multiplexed plural digital signals.
    Type: Grant
    Filed: December 5, 2008
    Date of Patent: December 13, 2011
    Assignee: Fujitsu Limited
    Inventor: Hideki Yoshizawa
  • Patent number: 8073000
    Abstract: In a code division multiplex transmitting and receiving system, the transmitting apparatus inserts a clock signal in the code division multiplex signal. The clock signal has a frequency equal to a null frequency in the frequency spectrum of the code division multiplex signal. The receiving apparatus extracts this frequency component from the received signal and recovers the clock signal, using an ordinary clock recovery device of the type designed to recover a clock signal from a bi-level signal. The recovered clock signal is used as a synchronizing signal in the processing of the received signal.
    Type: Grant
    Filed: January 27, 2009
    Date of Patent: December 6, 2011
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Masahiro Sarashina
  • Patent number: 8059699
    Abstract: Disclosed is a low power consumption GNSS receiver by adaptively adjusting clock frequency. A correlator performs correlations to signals received from the channels with a correlator clock frequency. A DSP controls the correlator clock frequency according to a correlator load to performing correlations. The DSP calculates and adjusts code phases and Doppler frequencies for the signals in turn with a DSP clock frequency. The DSP controls the DSP clock frequency according to an accumulated throughput of calculation and adjustment or a predetermined threshold number of channels. The DSP controls the RF power according to the correlator load. A microprocessor processes a measurement result of the calculation and the adjustment for obtaining position information with a microprocessor clock frequency. The microprocessor controls the microprocessor clock frequency according to an accumulated progress of processing the measurement result. Accordingly, reducing power consumption for the GNSS receiver can be realized.
    Type: Grant
    Filed: May 11, 2007
    Date of Patent: November 15, 2011
    Assignee: Mediatek Inc.
    Inventors: Hsin-chung Yeh, Ming-hung Lee, Zong-hua You
  • Patent number: 8059630
    Abstract: The present invention provides a unique manner of identifying the Frame boundaries in multiple identical/non-identical Synchronization Channels (SCHs) in different sub-frames via a new sub frame position difference method. The method implements the differences between the different sub-frames carried by the SCH. The sub frame identity, and hence the frame boundary, can be identified by calculating the difference between the positions, based on time or number of slots/sub-frames or any data packets, of the two subsequent slots/sub-frames or any identical data packets.
    Type: Grant
    Filed: August 23, 2007
    Date of Patent: November 15, 2011
    Assignee: Samsung Electronics Co., Ltd
    Inventor: Basu Mallick Prateek
  • Patent number: 8059018
    Abstract: Methods and systems for digital control utilizing oversampling.
    Type: Grant
    Filed: September 8, 2008
    Date of Patent: November 15, 2011
    Assignee: L&L Engineering, LLC
    Inventors: Paul Latham, Stewart Kenly
  • Patent number: 8054861
    Abstract: A method of processing data comprises the receiving a frame of data having a predetermined number of time slots (502,504,506). Each time slot comprises a respective plurality of data symbols (520). The method further comprises a primary (508), a secondary (510) and a tertiary (512) synchronization code in each said predetermined number of time slots.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: November 8, 2011
    Assignee: Texas Instruments Incorporated
    Inventor: Sundararajan Sriram
  • Patent number: 8036256
    Abstract: A method of generating a code sequence in a wireless communication system is disclosed. More specifically, the method includes recognizing a desired length of the code sequence, generating a code sequence having a length different from the desired length, and modifying the length of the generated code sequence to equal the desired length. Here, the step of modifying includes discarding at least one element of the generated code sequence or inserting at least one null element to the generated code sequence.
    Type: Grant
    Filed: May 11, 2010
    Date of Patent: October 11, 2011
    Assignee: LG Electronics Inc.
    Inventors: Seung Hee Han, Min Seok Noh, Yeong Hyeon Kwon, Hyun Hwa Park, Hyun Woo Lee, Dong Cheol Kim
  • Publication number: 20110243196
    Abstract: A diamine absorbent that contains heat stable salts is regenerated using an ion exchange process wherein the cation exchange resin is regenerated using sulfurous acid reflux.
    Type: Application
    Filed: December 7, 2009
    Publication date: October 6, 2011
    Applicant: NORTEL NETWORKS LIMITED
    Inventors: Charles Nicholls, Michel Ouellette
  • Patent number: 8014456
    Abstract: A system includes a differential demodulation module that differentially demodulates modulated signals received from R antennas. A first summing module sums the differentially demodulated signals to generate a combined signal. A state detection module detects states of X symbols in the combined signal. A second summing module (i) receives Y preamble sequences each comprising X predetermined symbols and (ii) generates X sums for each of the Y preamble sequences by adding each of the states of the X symbols with corresponding states of the X predetermined symbols of each of Y preamble sequences. The states of the X predetermined symbols are generated by inverting states of derived symbols in derived preamble sequences, which are derived from the Y preamble sequences. Each of the Y preamble sequences is different from others of the Y preamble sequences. R, X, and Y are integers greater than 1.
    Type: Grant
    Filed: June 19, 2007
    Date of Patent: September 6, 2011
    Assignee: Marvell International Ltd.
    Inventors: Jongwon Lee, Hui-Ling Lou
  • Patent number: 8014437
    Abstract: A system for implementing an orthogonal frequency division multiplexing scheme and providing an improved range extension. The system includes a transmitter for transmitting data to a receiver. The transmitter includes a symbol mapper for generating a symbol for each of a plurality of subcarriers and a spreading module for spreading out the symbol on each of the plurality of subcarriers by using a direct sequence spread spectrum. The symbol on each of the plurality of subcarriers is spread by multiplying the symbol by predefined length sequences. The receiver includes a de-spreader module for de-spreading the symbols on each of the plurality of subcarriers. The de-spreader module includes a simply correlator receiver for obtaining maximum detection. The correlator produces an output sequence of a same length as an input sequence and the de-spreader module uses a point of maximum correlation on the output sequence to obtain a recovered symbol.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: September 6, 2011
    Assignee: Broadcom Corporation
    Inventor: Jason Alexander Trachewsky
  • Patent number: 8009636
    Abstract: A base station for controlling transmission power during the establishment of a communication channel utilizes the reception of a short code during initial power ramp-up. The short code is a sequence for detection by the base station which has a much shorter period than a conventional access code. The ramp-up starts from a power level that is lower than the required power level for detection by the base station. The power of the short code is quickly increased until the signal is detected by the base station. Once the base station detects the short code, it transmits an indication that the short code has been detected.
    Type: Grant
    Filed: June 29, 2005
    Date of Patent: August 30, 2011
    Assignee: InterDigital Technology Corporation
    Inventors: Fatih Ozluturk, Gary R. Lomp
  • Patent number: 8000380
    Abstract: A detection unit is disclosed for the detection of data symbols contained in a demodulated signal, whereby band spreading occurs transmit-side with the use of first sequences, whose first chips each assume one of two different first values.
    Type: Grant
    Filed: November 9, 2006
    Date of Patent: August 16, 2011
    Assignee: Atmel Corporation
    Inventor: Frank Poegel
  • Patent number: 7995694
    Abstract: A method for detecting a specific timing from a synchronization channel is described. A signal with a known sequence is received. Two or more correlation values between the received signal and the known sequence are calculated at two or more positions. The two or more correlation values are compared. A determination is made whether the position of the known sequence has been shifted based on the comparison. A specific timing of a synchronization channel is detected based on the determination.
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: August 9, 2011
    Assignee: Sharp Laboratories of America, Inc.
    Inventors: Kimihiko Imamura, Prem L. Sood
  • Patent number: 7991064
    Abstract: An apparatus for generating sets of radio parameters includes a first deriving unit deriving a set of radio parameters for specifying a symbol including an effective symbol part with the same period as the effective symbol part specified by another set of radio parameters and a guard interval part with a different period from the guard interval part specified by the other set of radio parameters. The apparatus further includes a second deriving unit deriving a set of radio parameters so that an occupancy proportion of the guard interval part in a single symbol specified by another set of radio parameters is equal to an occupancy proportion of the guard interval part in a single symbol specified by the other set of radio parameters.
    Type: Grant
    Filed: October 27, 2010
    Date of Patent: August 2, 2011
    Assignee: NTT Docomo, Inc.
    Inventors: Mamoru Sawahashi, Kenichi Higuchi, Hiroyuki Atarashi, Motohiro Tanno, Yoshihisa Kishiyama, Yoshiaki Ofuji
  • Patent number: 7991040
    Abstract: Methods and apparatus for reduction of a peak to average ratio for an OFDM transmit signal. In an aspect, a method is provided for reducing a peak to average ratio of a transmit waveform. The method includes obtaining a primary scrambler sequence, generating a secondary scrambler sequence having a length characteristic based on data to be scrambled, and combining the primary and secondary scrambler sequences to produce a PAR reduction sequence. In another aspect, an apparatus is provided for reducing a peak to average ratio of a transmit waveform. The apparatus includes a secondary generator configured to generate a secondary scrambler sequence having a length characteristic based on data to be scrambled, and combining logic configured to combine a primary scrambler sequence and the secondary scrambler sequences to produce a PAR reduction sequence.
    Type: Grant
    Filed: September 11, 2006
    Date of Patent: August 2, 2011
    Assignee: QUALCOMM Incorporated
    Inventors: Durk L. van Veen, Fuyun Ling, Raghuraman Krishnamoorthi
  • Patent number: 7986675
    Abstract: A method of allocating channels in a user equipment is disclosed. In particular, a method of allocating a plurality of Dedicated Physical Channels (DPCHs) and Enhanced Dedicated Channels (E-DCHs) in a user equipment of a multicode transmission system. The method includes determining whether a High Speed Downlink Shared Channel (HS-DSCH) is configured for the user equipment (UE) and determining a number of codes used by the DPCH and the E-DCH. The method further includes allocating the DPCH and the E-DCH channels to an I branch or a Q branch based on the number of codes used by the DPCH and the E-DCH and the HS-DSCH configuration.
    Type: Grant
    Filed: August 12, 2010
    Date of Patent: July 26, 2011
    Assignee: LG Electronics Inc.
    Inventors: Bong Hoe Kim, Joon Kui Ahn, Hak Seong Kim, Dong Wook Roh, Dong Youn Seo, Seung Hwan Won
  • Patent number: 7986725
    Abstract: A code phase signalling module arranged to provide code phase signalling to assist in signal acquisition of direct sequence spread spectrum signalling received by a receiver module from a transmitter module. The code phase signalling is arranged to be used by the receiver module to synchronise the phase of a synchronisation code provided from within the receiver module with the phase of a modulation code of the direct spread spectrum sequence signalling received by the receiver module. The synchronisation code sequence corresponds to the modulation code sequence. The code phase signalling module is arranged to provide code phase time signalling representing the offset time of the synchronisation code from a reference time. The reference time is associated with the time of transmission of a particular reference portion of the modulation code of the direct spread spectrum signaling.
    Type: Grant
    Filed: March 4, 2005
    Date of Patent: July 26, 2011
    Assignee: Nokia Corporation
    Inventor: Kimmo Alanen
  • Patent number: 7961773
    Abstract: A weighted open loop power control transmitter for controlling transmission power levels using a spread spectrum time division duplex (TDD) technique having frames with timeslots for communication includes a demodulator configured to receive a transmitted signal from the receiver, a channel estimation device, a data estimation device, and a weighted open loop power controller. The weighted open loop power controller includes a power measurement device, a pathloss estimation device configured to receive an interpreted power level from the data estimation device and estimate the pathloss and update a long term average of the pathloss, a quality measurement device, and a transmit power calculation device for determining the transmitter's power level and to control the receiver's amplifier.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: June 14, 2011
    Assignee: InterDigital Technology Corporation
    Inventors: Ariela Zeira, Sung-Hyuk Shin
  • Patent number: 7961776
    Abstract: A device for decoding a direct sequence spread spectrum-encoded binary message includes a sampler that captures at least one sequence of binary samples corresponding to one bit of the transmitted message. The captured sequence of samples are applied to a filter matched to the spreading code used, thus making it possible to delete the spreading applied to the original message. The device further includes, at the output of the sampler, an error correction block including a memory storing a plurality of binary sequences corresponding to all of the possible values for a captured sequence of samples. A replacement circuit replaces the captured sequence of samples with the stored sequence, thereby minimizing the number of samples different from the captured sequence of samples, and allowing the stored sequence to be applied to the matched filter.
    Type: Grant
    Filed: November 28, 2006
    Date of Patent: June 14, 2011
    Assignees: STMicroelectronics (Rousset) SAS, Universite de Provence d'Aix-Marseille I
    Inventors: Benoît Durand, Christophe Fraschini, Philippe Courmontagne, Stéphane Meilleire
  • Patent number: 7957361
    Abstract: A reception step receives a multicarrier signal containing subcarriers, at least one of which a synchronization signal is transmitted therein, multiplied only by a synchronization signal spreading code, a correlation detection step detects correlation values between the received multicarrier signal and replicas of the synchronization signal, and a timing detection step detects a FFT timing and a long code received timing according to the correlation values.
    Type: Grant
    Filed: June 19, 2006
    Date of Patent: June 7, 2011
    Assignee: NTT DoCoMo, Inc.
    Inventors: Yukiko Hanada, Kenichi Higuchi, Mamoru Sawahashi
  • Publication number: 20110128995
    Abstract: In a wireless communication system, a portable device transmits a first signal spread based on a reference period indicated by a synchronization signal transmitted from an in-vehicle device and transmits a second signal spread based on an operation by a user. The in-vehicle device sets a search period based on a variation range in a delay time from when the synchronization signal is transmitted to when the spread first signal is transmitted and sets a residual period that starts at an ending point of the search period and ends at an ending point of the reference period when a starting point of the reference period is set at a starting point of the search period. When the in-vehicle device fails in a synchronous acquisition for the search period, the in-vehicle device performs a synchronous acquisition process for the residual period.
    Type: Application
    Filed: October 26, 2010
    Publication date: June 2, 2011
    Applicants: Nippon Soken, Inc., DENSO CORPORATION
    Inventors: Kenichiro Sanji, Akira Takaoka, Hiromichi Naitoh, Masahiro Sugiura
  • Patent number: 7953119
    Abstract: Disclosed is a method and an apparatus for transmitting a downlink Synchronization CHannel (SCH) in an Orthogonal Frequency Division Multiplexing (OFDM)-based cellular wireless communication system supporting a scalable bandwidth. Herein, initial cell search and neighbor cell search are seamlessly performed. The disclosed method and apparatus disclose a synchronization channel structure applicable to both a Frequency Division Duplex (FDD) system and a Time Division Duplex (TDD) system.
    Type: Grant
    Filed: October 2, 2007
    Date of Patent: May 31, 2011
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Joon-Young Cho, Ju-Ho Lee
  • Patent number: 7953142
    Abstract: A variable code-tracking loop filter in a receiver having the ability to change its parameters multiple times in response to received signals. Parameters for the code-tracking loop filter may be varied based on phase and frequency errors from an error detector. In one implementation, the code-tracking loop filter is able to repeatedly vary a single parameter, such as its received bandwidth, based on the phase and frequency errors, while in another, the code-tracking loop filter may vary two or more parameters, such as the loop bandwidth and the natural frequency.
    Type: Grant
    Filed: October 17, 2002
    Date of Patent: May 31, 2011
    Assignee: Sirf Technology
    Inventor: Mangesh Chansarkar
  • Patent number: 7953137
    Abstract: A method of generating a code sequence in a wireless communication system is disclosed. More specifically, the method includes recognizing a desired length of the code sequence, generating a code sequence having a length different from the desired length, and modifying the length of the generated code sequence to equal the desired length. Here, the step of modifying includes discarding at least one element of the generated code sequence or inserting at least one null element to the generated code sequence.
    Type: Grant
    Filed: May 11, 2010
    Date of Patent: May 31, 2011
    Assignee: LG Electronics Inc.
    Inventors: Seung Hee Han, Min Seok Noh, Yeong Hyeon Kwon, Hyun Hwa Park, Hyun Woo Lee, Dong Cheol Kim
  • Publication number: 20110116530
    Abstract: A method and apparatus provide hybrid automatic repeat request (HARQ) feedback corresponding to the status of multiple downlink carriers, with or without MIMO being configured. Here, for at least some configurations, with respect to the selection of HARQ feedback symbols, the downlink carriers are grouped into groups of one or two carriers such that HARQ feedback symbol code books that were previously implemented in conventional HSDPA or DC-HSDPA systems may be utilized. That is, after encoding a data stream, HARQ feedback symbols selected from a plurality of code books configured for groups of one or two of the downlink carriers are utilized to modulate an uplink channel. The modulation or channelization may be accomplished with dual channelization codes or a single channelization code with a reduced spreading factor to insert two symbols into a single time slot.
    Type: Application
    Filed: October 4, 2010
    Publication date: May 19, 2011
    Applicant: QUALCOMM, Incorporated
    Inventor: Sharad Deepak Sambhwani
  • Patent number: 7945206
    Abstract: A communication device has a first transceiver that operates in a first communication system in the presence of a second transceiver that operates in a second communication system that is unrelated to the first communication system. A scheduler of packets for transmission by the first transceiver uses information about when the second communication system will be transmitting a signal that will interfere with reception by the first transceiver, and schedules data for which re-transmission is not essential in those time slots in which an implicit NACK is expected due to the second transceiver's operation.
    Type: Grant
    Filed: February 4, 2009
    Date of Patent: May 17, 2011
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Leif Wilhelmsson, Stefan Parkvall, Johan Sköld
  • Patent number: 7940834
    Abstract: A GNSS receiver and method using alternating “A” and “B” time segments for a reception time length of two or more data bits. The GNSS signal in an “A” time period comprising the “A” time segments is integrated for determining “A” magnitudes corresponding to code phase increments and the GNSS signal in a “B” time period comprising the “B” time segments is integrated for determining “B” magnitudes corresponding to code phase increments. A trial-and-error data bit search is performed for depolarizing data bit senses. The code phase increment showing the largest correlation level is used for acquisition of the GNSS signal and/or determination of the location where the GNSS is being received.
    Type: Grant
    Filed: May 15, 2008
    Date of Patent: May 10, 2011
    Assignee: Trimble Navigation Limited
    Inventors: David R. Gildea, Peter Van Wyck Loomis
  • Patent number: 7933308
    Abstract: A signal transmission and reception device is disclosed that can be made compact and has wide-band band-pass characteristics. The signal transmission and reception device includes a first filtering unit that is composed of a distributed constant circuit and is capable of eliminating a first frequency component or a second frequency component. The second frequency is higher than the first frequency, and a second filtering unit that attenuates components of frequencies lower than the first frequency or components of frequencies higher than the second frequency.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: April 26, 2011
    Assignee: Fujitsu Component Limited
    Inventors: Shigemi Kurashima, Masahiro Yanagi, Satoshi Sakurai, Takuya Uchiyama, Takashi Yuba, Takashi Arita
  • Patent number: 7929917
    Abstract: A method for operating an integrated transceiver, comprising coupling an operating transmitter and an operating receiver within the integrated wideband receiver, inputting a signal into the operating transmitter, performing a first conversion of the signal, wherein the signal is converted into a second signal, transmitting the second signal into the operating receiver, performing a second conversion of the signal, wherein the signal is converted into a third signal, transmitting the third signal into the operating transmitter, and adjusting the operating transmitter.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: April 19, 2011
    Assignee: Nortel Networks Limited
    Inventors: Bradley John Morris, Edward M. Sich
  • Patent number: 7929509
    Abstract: A method and apparatus for reduced acquisition time are disclosed. In one embodiment, such as in a W-CDMA system, a receiver receives one or more signals from remote stations, each signal comprising a scrambling code associated with one of a plurality of code groups, each code group identified by a unique series of a synchronization codes. A searcher identifies a subset of first synchronization codes, and a processor selects one or more hypotheses in response to the received subset. The searcher may then perform searching for a scrambling code in accordance with the one or more hypotheses. The scrambling code search may be performed in parallel with continued synchronization code searching. Various other embodiments are also disclosed.
    Type: Grant
    Filed: May 10, 2005
    Date of Patent: April 19, 2011
    Assignee: Qualcomm Incorporated
    Inventor: Inyup Kang
  • Patent number: 7916771
    Abstract: A method and apparatus for acquiring and tracking a BOC signal in a satellite navigation receiver includes a synthesized acquisition test function or a discriminator for code delay provided by combining a BOC autocorrelation function and a BOC/PRN cross-correlation function.
    Type: Grant
    Filed: May 16, 2005
    Date of Patent: March 29, 2011
    Assignees: UTI Limited Partnership, Ecole Nationale de l'Aviation Civile
    Inventors: Olivier Julien, Christophe Macabiau, M. Elizabeth Cannon, Gerard Lachapelle
  • Patent number: 7912165
    Abstract: A method is disclosed, including identifying a preamble in a frame, where the preamble has a preamble length 1. M data items received in succession are stored. The m data items once divided into n portions, where the data items in each portion have respectively been received at successive times and where m and n are natural numbers and the following applies to m and n: m>n, m>1, n>1. The n portions are respectively correlated to the expected values to form component correlation results. Delaying the component correlation results, with at least two component correlation results being delayed by different lengths. The method also includes combining the delayed component correlation results to form a total correlation value. The total correlation value is used to determine whether the m received data items contain the preamble of a frame.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: March 22, 2011
    Assignee: Infineon Technologies AG
    Inventors: Stefan Herzinger, Andreas Menkhoff, Stefan Meier, Norbert Neurohr
  • Patent number: 7912162
    Abstract: Methods, apparatus, systems and devices are implemented according to a number of embodiments. According to one such embodiment, a method of synchronizing a receiver to a timing and carrier frequency of a communication system is implemented. A set of predetermined possible synchronization patterns is detected in a received signal. Timing and structure information is generated specifying the occurrence of detected ones of said predetermined set of possible synchronization patterns in said received signal. Channel coefficient estimations of different receiving channels are derived from the timing and structure information. A carrier frequency offset is determined for the received signal based on a comparison of predetermined ones of said derived channel coefficient estimates.
    Type: Grant
    Filed: September 14, 2004
    Date of Patent: March 22, 2011
    Assignee: NXP B.V.
    Inventor: Stefan Mueller-Weinfurtner
  • Patent number: 7907575
    Abstract: A method of allocating channels in a user equipment is disclosed. In particular, a method of allocating a plurality of Dedicated Physical Channels (DPCHs) and Enhanced Dedicated Channels (E-DCHs) in a user equipment of a multicode transmission system. The method includes determining whether a High Speed Downlink Shared Channel (HS-DSCH) is configured for the user equipment (UE) and determining a number of codes used by the DPCH and the E-DCH. The method further includes allocating the DPCH and the E-DCH channels to an I branch or a Q branch based on the number of codes used by the DPCH and the E-DCH and the HS-DSCH configuration.
    Type: Grant
    Filed: August 12, 2010
    Date of Patent: March 15, 2011
    Assignee: LG Electronics Inc.
    Inventors: Bong Hoe Kim, Joon Kui Ahn, Hak Seong Kim, Dong Wook Roh, Dong Youn Seo, Seung Hwan Won
  • Patent number: 7903618
    Abstract: An apparatus and method in which an Enhanced Uplink Dedicated transport CHannel (EUDCH) is used in a Wideband Code Division Multiple Access (WCDMA) system is provided. In a User Equipment (UE), when physical channels for transmitting EUDCH data are transmitted in addition to existing physical channels, a Peak-to-Average Power Ratio (PAPR) of an uplink transport signal increases. The increase in PAPR depends upon Orthogonal Variable Spreading Factor (OVSF) codes allocated to the corresponding physical channels and In-phase/Quadrature-phase (I/Q) channels. Therefore, the apparatus and method allocate optimum OVSF codes and I/Q channels to EUDCH-related physical channels in order to minimize an increase in PAPR due to EUDCH.
    Type: Grant
    Filed: May 11, 2009
    Date of Patent: March 8, 2011
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Joon-Young Cho, Ju-Ho Lee, Youn-Hyoung Heo, Yong-Jun Kwak, Young-Bum Kim
  • Patent number: 7885315
    Abstract: The specification and drawings present a new method, system, apparatus and software product for pilot scrambling using a scrambling code (e.g., pseudo-noise code such as a Gold code, a Kasami code, a Hadamard code, m-sequences, etc.) in communication systems, e.g., for wireless communications. The sector/cell specific scrambling codes are mapped to the multiple pilot symbols within, e.g., an SCH (synchronization channel) repetition period. This improves receiver performance on a sector edge and/or a cell edge in, e.g., tight-frequency re-use applications.
    Type: Grant
    Filed: January 10, 2007
    Date of Patent: February 8, 2011
    Assignee: Nokia Corporation
    Inventor: Gilles Charbit
  • Patent number: 7877529
    Abstract: Synchronization management is provided for a continuous serial data streaming application wherein the serial data stream includes a plurality of consecutive, identical-length segments of consecutive serial data bits. Synchronization management bits are provided in each segment. The synchronization management bits are programmed such that the synchronization management bits contained in first and second adjacent segments of the serial data stream will bear a predetermined relationship to one another. At the receiving end, the synchronization management bits are examined from segment to segment. In this manner, synchronization can be monitored, synchronization loss can be detected, and synchronization recovery can be achieved.
    Type: Grant
    Filed: January 31, 2005
    Date of Patent: January 25, 2011
    Assignee: National Semiconductor Corporation
    Inventors: David J. Fensore, Robert L. Macomber, James E. Schuessler
  • Patent number: 7873328
    Abstract: A base station for controlling transmission power during the establishment of a communication channel utilizes the reception of a short code during initial power ramp-up. The short code is a sequence for detection by the base station which has a much shorter period than a conventional access code. The ramp-up starts from a power level that is lower than the required power level for detection by the base station. The power of the short code is quickly increased until the signal is detected by the base station. Once the base station detects the short code, it transmits an indication that the short code has been detected.
    Type: Grant
    Filed: May 7, 2008
    Date of Patent: January 18, 2011
    Assignee: InterDigital Technology Corporation
    Inventors: Fatih M. Ozluturk, Gary R. Lomp
  • Patent number: 7869409
    Abstract: A multi-mode transmitter (301) is adapted to modulate a data packet (200) communicated by a wireless communications signal. The data packet includes a packet header comprising a preamble (201) and a start of frame delimiter (202), and a data payload comprising a payload data length portion (203) and a payload portion (204). The packet header is modulated with a spread spectrum technique. When transmitting a data payload in one mode, the data payload is also modulated with the spread spectrum technique. When transmitting a data payload in another mode, the data payload is modulated with a non-spread spectrum technique.
    Type: Grant
    Filed: March 26, 2007
    Date of Patent: January 11, 2011
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Jorge Ivonnet, Robert Mark Gorday, Kevin McLaughlin
  • Patent number: 7860132
    Abstract: A method of processing data comprises the receiving a frame of data having a predetermined number of time slots (502,504,506). Each time slot comprises a respective plurality of data symbols (520). The method further comprises a primary (508), a secondary (510) and a tertiary (512) synchronization code in each said predetermined number of time slots.
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: December 28, 2010
    Assignee: Texas Instruments Incorporated
    Inventor: Sundararajan Sriram