Having Specific Signaling For Code Synchronization Patents (Class 375/145)
  • Patent number: 8374350
    Abstract: A system for transmitting quantum information includes a sending unit including an encoder configured to encode a carrier with quantum information by setting a quantum state of the carrier, the quantum state determined according to the combination of a first component and a second component, and a receiving unit including a decoder configured to perform a measurement on the carrier using a measurement basis selected to cancel the second component and decode the quantum information from the carrier.
    Type: Grant
    Filed: September 8, 2006
    Date of Patent: February 12, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Zhiliang Yuan, Andrew James Shields
  • Patent number: 8374229
    Abstract: A method for the generation of a signal including a minimum of disturbances and noise is provided. A method for the detection of a signal including a minimum of disturbances and noise is also provided. An element of the signal is functionally dependent on at least one further element of the signal.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: February 12, 2013
    Assignee: Siemens Aktiengesellschaft
    Inventor: Jaroslaw Kussyk
  • Patent number: 8374218
    Abstract: A method can include receiving, at a transmitter, during a symbol time that comprises a plurality of chip times, a data value for each of a plurality of distinct data channel inputs. During each chip time, the method can include (a) indexing a different row of a matrix of data bits; (b) decoding one channel input using a first subset of one or more columns of the indexed row; (c) determining a code value for the decoded one channel from a second subset of one or more columns of the indexed row; and (d) providing the coded data value to a transmission circuit for transmission to a receiver. Actions (a) to (d) can be performed for each of the plurality of chip times in the symbol time. In some implementations, the matrix of data bits is a Hadamard matrix with randomly shuffled rows.
    Type: Grant
    Filed: June 9, 2009
    Date of Patent: February 12, 2013
    Assignee: Google Inc.
    Inventor: Michial Allen Gunter
  • Patent number: 8369386
    Abstract: A receiver includes a receiving unit that receives a signal from a satellite, a frequency conversion-discretization unit that converts the signal received in the receiving unit into an intermediate frequency signal of a frequency bandwidth including 0 Hz, and discretizes the frequency-converted intermediate frequency signal with a predetermined sampling frequency, a filter unit that filters the discretized signal, which is output from the frequency conversion-discretization unit, through a predetermined filter, a synchronization acquisition unit that acquires synchronization of a spreading code in the discretized signal filtered by the filter unit, and a synchronization holding unit that holds the synchronization of the spreading code, which is acquired by the synchronization acquisition unit.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: February 5, 2013
    Assignee: Sony Corporation
    Inventors: Hideki Takahashi, Katsuyuki Tanaka
  • Publication number: 20130010835
    Abstract: A disclosed code-division-multiple-access (CDMA) system has a base station (BS) and remote stations (RSs). A BS-spread-spectrum transmitter broadcasts a common-synchronization channel having a chip-sequence signal common to the remote stations served by the BS, and a frame-timing signal. A RS-spread-spectrum receiver receives the broadcast common-synchronization channel, and determines frame timing from the frame-timing signal. A first RS-spread-spectrum transmitter transmits an access-burst signal, which has a plurality of segments. Each access burst signal segment has a plurality of power levels. A BS-spread-spectrum receiver receives the access-burst signal at a detected-power level. In response to receiving the access-burst signal, a BS-spread-spectrum transmitter transmits an acknowledgment signal to the RS-spread-spectrum receiver.
    Type: Application
    Filed: September 15, 2012
    Publication date: January 10, 2013
    Inventors: Emmanuel KANTERAKIS, Kourosh Parsa
  • Patent number: 8351550
    Abstract: A correlation apparatus and method for frequency synchronization are provided. A frequency synchronization method of a receiver in a broadband wireless access communication system includes acquiring a highest correlation value by conducting a differential correlation of a variable interval between a received signal and a reference signal and performing a frequency synchronization according to the highest correlation value.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: January 8, 2013
    Assignees: Samsung Electronics Co., Ltd., Sungkyunkwan University Foundation for Corporate Collaboration
    Inventors: Hee-Jin Roh, Jeoung-Gil Lee, Su-Jin Yoon, Hoon Kang, Chang-Hyun Baik, Jun-Kyu Kang, Hyung-Jin Choi, Se-Bin Im, Dae-Hong Lee
  • Patent number: 8351540
    Abstract: A codebook, a codebook creating method, and an uplink transmission method and equipment based on the codebook relating to per-coding in telecommunication are provided. In the method, a codebook size and a symbol set are determined. A minimum distance is calculated. A maximum codebook is selected according to the minimum distance. The method is used in per-coding of uplink transmission to reduce power loss of an uplink power amplifier.
    Type: Grant
    Filed: October 12, 2011
    Date of Patent: January 8, 2013
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Yongxing Zhou
  • Patent number: 8345714
    Abstract: A cell search method and apparatus for an asynchronous mobile communication system are provided. A Secondary Synchronization Code (SSC) correlator despreads a signal at every slot boundary in accordance with a z-sequence to output a SSC correlation value. The signal is received over a first symbol duration. A Primary Synchronization Code (PSC) correlator despreads the received signal in accordance with a PSC to output a PSC correlation value. A dot product calculator performs dot product calculation between the SSC correlation value and the PSC correlation value to output a correlation result of the SSC. A frame synchronization detector extracts frame synchronization information from the correlation result.
    Type: Grant
    Filed: September 9, 2009
    Date of Patent: January 1, 2013
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Dong Ryeol Ryu, Kwang Man Ok
  • Patent number: 8345804
    Abstract: A low complexity RACH preamble detector is described herein. The RACH preamble detection algorithm uses the peak detection of the time domain correlation function through frequency domain processing. The frequency domain processing considers the reference signals generated directly from frequency domain CAZAC sequence or time domain CAZAC sequence with DFT conversion. A low-complexity poly-phase LPF along with down sampling is implemented before the FFT to reduce the required length of the long FFT operation N-folded.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: January 1, 2013
    Assignee: Alcatel Lucent
    Inventors: Lei Song, Fang-Chen Cheng, Henry H. Ye
  • Patent number: 8345725
    Abstract: Systems (100) and methods (700) for processing a data signal in a communications system. The methods involve generating a first chaotic sequence at a transmitter (102). The methods also involve performing first basis function algorithms using the first chaotic sequence to generate first statistically orthogonal chaotic sequences. At least one sequence is selected from the first statistically orthogonal chaotic sequences for combining with a first data signal. The selected sequence is combined with a second data signal to obtain a modulated chaotic communication signal. The modulated chaotic communication signal is transmitted to a receiver (104). At the receiver, the received modulated chaotic communication signal is processed to obtain data therefrom. Notably, the signal processing generally involves performing a deterministic process (e.g., a Hidden Markov Model deterministic process).
    Type: Grant
    Filed: March 11, 2010
    Date of Patent: January 1, 2013
    Assignee: Harris Corporation
    Inventor: Alan J. Michaels
  • Patent number: 8335288
    Abstract: In a method for communication, first and second signals for timing synchronization are generated. Frequencies of the first and second signals are converted to other frequencies to obtain a first and second RF signals, which have a specific frequency gap therebetween. The first and second RF signals are combined to obtain a transmission signal, and the transmission signal is transmitted. When the transmission signal is received as a received signal, the frequency of the received signal is shifted by the specific frequency gap to obtain a converted signal. A complex conjugation of the converted signal calculated to obtain a complex conjugation signal. The received signal and the complex conjugation signal are multiplied to obtain a multiplication signal to calculate cross-correlation between a product of the first and second signals and the multiplication signal. A peak of the cross-correlation is detected to set a base time for timing synchronization.
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: December 18, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Ren Sakata, Tazuko Tomioka
  • Patent number: 8331420
    Abstract: Embodiments of methods and apparatus for wirelessly communicating signals include one or more transmitters configured to generate a plurality of wireless signal for transmission. Each of the wireless signals includes a plurality of pilot signals represented in a plurality of unevenly spaced, in-band subcarriers. Pilot signals of each wireless signal are positioned at subcarriers that are orthogonal in frequency with subcarriers at which pilot signals of all other wireless signals are positioned. According to an embodiment, subcarrier indices each the plurality of pilot signals are determined using a third order or higher order polynomial parameterization of pilot subcarriers in conjunction with a convex optimization algorithm to produce pilot signals having near-optimal channel estimate mean square error (MSE) performance. The wireless signals are simultaneously radiated over a wireless communication channel using a plurality of co-located or distributed antennas.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: December 11, 2012
    Assignee: General Dynamics C4 Systems, Inc.
    Inventors: John E. Kleider, Benjamin Russell Hamilton
  • Patent number: 8331863
    Abstract: An embodiment for wirelessly communicating a signal includes a transmitter combining a plurality of phase shifted input data signals with a plurality of synchronization/pilot sequences to produce a plurality of combined signals, performing frequency domain-to-time domain transformations of the combined signals to produce a plurality of candidate signals, determining peak-to-average ratios for at least some of the plurality of candidate signals, identifying a selected signal from the plurality of candidate signals based on the peak-to-average ratios, and transmitting the selected signal over a wireless communication channel.
    Type: Grant
    Filed: January 26, 2012
    Date of Patent: December 11, 2012
    Assignee: General Dynamics C4 Systems, Inc.
    Inventors: John Eric Kleider, Robert John Baxley
  • Patent number: 8325784
    Abstract: A communication apparatus is connected to a transmission channel for transmitting data to another communication apparatus. The communication apparatus includes: a communication frame generator which generates a communication frame for storing the data; and a controller which controls to insert a pilot symbol into the communication frame based on a state of the transmission channel.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: December 4, 2012
    Assignee: Panasonic Corporation
    Inventors: Taisuke Konishi, Nobuhiko Noma, Nobutaka Kodama, Hisao Koga, Shigeo Yoshida
  • Patent number: 8325782
    Abstract: Communication circuitry uses a combination of Pseudo-Noise (PN) coded and non-PN coded transmission periods to represent different data values. In one embodiment, a number of data values are encoded into a smaller second number of encoded ternary values. The Pseudo-Noise (PN) codes are transmitted representing some of the encoded ternary values and no transmitted PN codes represent other encoded ternary values. The throughput of spread spectrum radio systems is increased by representing data values in fewer spread spectrum time slots.
    Type: Grant
    Filed: March 13, 2009
    Date of Patent: December 4, 2012
    Assignee: Cypress Semiconductor Corporation
    Inventor: David Wright
  • Patent number: 8311164
    Abstract: A correlation apparatus for tracking a satellite signal includes a shifter, a multiplexer and an accumulator. The shifter generates generating a Prompt signal, a plurality of Early signals and a plurality of Late signals. The multiplexer outputs at least one of the plurality of Early signals and at least one of the plurality of Late signals. The accumulator acquires a correlation signal to tracking the satellite signal.
    Type: Grant
    Filed: March 6, 2009
    Date of Patent: November 13, 2012
    Assignee: Core Logic, Inc.
    Inventor: Sung Chun Bu
  • Patent number: 8305872
    Abstract: In a method of enabling synchronization for a channel in an OFDM based telecommunication system initially providing a symbol for transmission and selecting at least two carrier frequencies, subsequently determining a respective weighting parameter for the selected frequencies and finally transmitting the symbol on all selected frequencies based on the weighting parameters.
    Type: Grant
    Filed: January 9, 2007
    Date of Patent: November 6, 2012
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Johan Nyström, Magnus Almgren, Lei Wan
  • Patent number: 8306811
    Abstract: A method of embedding data into an audio signal provides a data sequence for embedding in the audio signal and computes masking thresholds for the audio signal from a frequency domain transform of the audio signal. The masking thresholds correspond to subbands of the audio signal, which are obtained from a masking model used to compress the audio signal. The method applies the masking threshold to the data sequence to produce masked data sequence and inserts the masked data sequence in the audio signal to produce an embedded audio signal. A method of detecting data embedded in an audio signal analyzes the audio signal to estimate the masking threshold used in embedding the data and applies the estimated masking threshold to the audio signal to extract the embedded data.
    Type: Grant
    Filed: October 24, 2007
    Date of Patent: November 6, 2012
    Assignee: Digimarc Corporation
    Inventors: Ahmed Tewfik, Bin Zhu, Mitch Swanson
  • Patent number: 8300749
    Abstract: An endpoint or other communication device of a communication system includes a clock recovery module. The communication device is operative as a slave device relative to another communication device that is operative as a master device. The clock recovery module comprises a clock recovery loop configured to control a slave clock frequency of the slave device so as to synchronize the slave clock frequency with a master clock frequency of the master device. The clock recovery loop utilizes a frequency error estimator implemented as a maximum-likelihood estimator with slope fitting based on a sequence of arrival timestamps, and a loop filter implemented as a series combination of an adaptive-bandwidth filter and a proportional-integral controller.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: October 30, 2012
    Assignee: Alcatel Lucent
    Inventors: Ilija Hadzic, Dennis Raymond Morgan, Alf Neustadt, Zulfiquar Sayeed
  • Patent number: 8295325
    Abstract: A signature sequence employed in a wireless transmission over a channel is detected and utilized. The signature sequence is selected from a set of sequences formed by delay-Doppler shifts of a base sequence. Preferably but not exclusively, the set of sequences is formed by circular delay-Doppler shifts of the base sequence. The base sequence can be, for example, an m-sequence. A received signal is obtained from a received wireless transmission. A candidate sequence selector (90) selects a candidate sequence from among a set of sequences for evaluation as the signature sequence, the set of sequences having been formed by sequence set generator (88) as delay-Doppler shifts of a base sequence. An image former (82) uses the base sequence and the received signal to form a delay-Doppler image with respect to an image area pertinent to the candidate sequence.
    Type: Grant
    Filed: June 8, 2007
    Date of Patent: October 23, 2012
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventor: Jiann-Ching Guey
  • Patent number: 8284818
    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 signaling module is arranged to provide code phase time signaling 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 25, 2011
    Date of Patent: October 9, 2012
    Assignee: Nokia Corporation
    Inventor: Kimmo Alanen
  • Patent number: 8279908
    Abstract: A broadcasting method includes: using a first transmitter to send a signal including a plurality of frames of data synchronized with respect to a first GPS pulse signal, receiving the signal at a first remote transmitter, synchronizing the frames to a second GPS pulse signal at the first remote transmitter, and transmitting the synchronized frames from the remote transmitter to a plurality of receivers. A system that implements the method is also provided.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: October 2, 2012
    Assignee: iBiquity Digital Corporation
    Inventors: Russell Iannuzzelli, Stephen Douglas Mattson, Muthu Gopal Balasubramanian
  • Patent number: 8279910
    Abstract: Apparatus and methods of implementing code space search of received signals are described herein. A code space search is implemented as a searcher that perform a subtask that is dynamically reconfigurable at each boundary of an initial integration time. Each particular subtask sets forth a programmable configuration of coherent integration hypothesis that are performed during the initial integration time. The searcher stores the results of the coherent integration hypothesis in a first portion of memory. A search accelerator operates on the initial integration results. The search accelerator can perform coherent integration of various frequency bins of different timing hypothesis, can generate energy values of the coherent integration results, and can generate a non-coherent energy summation. The energy values of the coherent integrations and non-coherent energy summations are stored in a second portion of memory.
    Type: Grant
    Filed: March 2, 2007
    Date of Patent: October 2, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Douglas Grover, Christopher Patrick, Kai Tang
  • Publication number: 20120243577
    Abstract: A synchronization method for impulse system ultra-wideband takes frame as basic unit for data transmission, each frame is divided into a preamble symbol part and a data part, wherein the preamble symbol part sends a known impulse sequence for channel estimation and synchronization; the data part takes the information to be transmitted; the preamble symbol part is divided into two parts of a positive and negative impulse sequence and a same direction impulse sequence, the front is the positive and negative impulse sequence, which includes odd impulses with alternant positive and negative polarities; the rear is the same direction impulse sequence, which is composed of impulses with same polarity, and the polarity of impulse in the same direction impulse sequence is same as the polarity of the last impulse in the positive and negative impulse sequence.
    Type: Application
    Filed: September 28, 2009
    Publication date: September 27, 2012
    Inventors: Zaichen Zhang, Liang Wu, Xutao Yu, Guangguo Bi, Xiaohu You
  • Patent number: 8275019
    Abstract: Examples are disclosed for transmitting and receiving schemes for multiuser single-carrier space time spreading (STS) with frequency domain equalization.
    Type: Grant
    Filed: June 16, 2009
    Date of Patent: September 25, 2012
    Assignee: New Jersey Institute of Technology
    Inventors: Yeheskel Bar-Ness, Kodzovi Acolaste
  • Patent number: 8265217
    Abstract: The present invention includes a method of determining a phase estimate for an input signal having pilot symbols. The method includes receiving a plurality of pilot symbols, and then multiplying two or more pilot symbol slots by corresponding correlator coefficients to correct a phase estimate of the input signal.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: September 11, 2012
    Assignee: Broadcom Corporation
    Inventors: Tommy Yu, Amy Gayle Hundhausen
  • Patent number: 8265127
    Abstract: In one embodiment, a method includes generating a set of sequences of chip values and calculating a correlation between a demodulated signal and each one of two or more of the sequences. Each of the correlations has an absolute value, and one of the correlations has a highest absolute value. The method includes selecting the one of the sequences with the correlation having the highest absolute value; identifying a sequence index corresponding to the selected one of the sequences; and, for each of one or more data symbols in the demodulated signal, determining a value of the data symbol based on the sequence index corresponding to the selected one of the sequences.
    Type: Grant
    Filed: July 22, 2011
    Date of Patent: September 11, 2012
    Assignee: Atmel Corporation
    Inventor: Frank Poegel
  • Patent number: 8261079
    Abstract: A method for establishing shared information is described. The method includes estimating characteristics of a communication channel between two nodes based on signals transmitted between the nodes. The method also includes transmitting a signal from the first node to the second node, the signal being modulated with a first data sequence according to a first estimated characteristic, and transmitting a signal from the second node to the first node, the signal being modulated with a second data sequence according to a second estimated characteristic. Shared information is formed at each of the first and second nodes based on at least a portion of the first data sequence and at least a portion of the second data sequence.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: September 4, 2012
    Assignee: Qualcomm Atheros, Inc
    Inventors: Richard E. Newman, Lawrence W. Yonge, III
  • Patent number: 8259887
    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: June 30, 2011
    Date of Patent: September 4, 2012
    Assignee: Sharp Laboratories of America, Inc.
    Inventors: Kimihiko Imamura, Prem L. Sood
  • Patent number: 8259687
    Abstract: A code division multiple access (CDMA) user device configured to dynamically allocating at least at least one wireless communication channel to permit a more efficient allocation of wireless communication channels when providing high speed data service. The CDMA user device is configured to receive data traffic from at least one data buffer in a base station. The CDMA user device is dynamically allocated at least one wireless communication channel based on an urgency factor. The urgency factor indicates the urgency of traffic data to be transmitted from the at least one data buffer in the base station to the CDMA user device.
    Type: Grant
    Filed: January 29, 2004
    Date of Patent: September 4, 2012
    Assignee: IPR Licensing, Inc.
    Inventors: Lawrence R. Foore, James A. Proctor, Jr., Thomas E. Gorsuch, Carlo Amalfitano
  • Patent number: 8260361
    Abstract: A system and method are provided for improving the performance of a beamforming antenna array in a wireless communications system. By observing a predetermined times of channel spatial signatures, one or more test spatial signatures are generated based on statistical analysis of the observed spatial signatures for predicting channel characteristics. A beamforming weight is derived based on the generated test spatial signatures for beamforming by an antenna subsystem of the wireless communication system.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: September 4, 2012
    Assignee: Cisco Technology, Inc.
    Inventors: Hang Jin, John Grabner
  • Patent number: 8254512
    Abstract: A receiving method and apparatus for increasing coherent integration length while receiving a positioning signal from transmitters such as GPS satellites. In order to compensate for frequency drifts that may occur in the positioning signal, a hypothesis is made as to the frequency drift, which is inserted into the receiving algorithm. Advantageously, the length of coherent integration can be increased at the expense of reducing the length of incoherent integration while keeping the total integration length the same, the net effect of which is an increase in signal detection sensitivity. The frequency drift hypothesis has any appropriate waveform; for example, approximately linear or exponential.
    Type: Grant
    Filed: November 17, 2004
    Date of Patent: August 28, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Peter Gaal, Christopher Patrick
  • Patent number: 8249201
    Abstract: Certain embodiments of the present disclosure allow for detection of a transmitted preamble sequence by processing a correlation of a received signal and a preamble hypothesis in a way that exploits the good correlation properties of the known set of preamble sequences. For certain embodiments, the highest peaks of the correlation output may be compared across all preamble hypotheses to decide which preamble sequence is transmitted.
    Type: Grant
    Filed: January 31, 2009
    Date of Patent: August 21, 2012
    Inventors: Mingguang Xu, Miguel Griot, Pranav Dayal, Ayman Fawzy Naguib
  • Patent number: 8243772
    Abstract: An adjustable code generator is configurable to generate any of a plurality of spread-spectrum code signals. The adjustable code generator includes a feedback polynomial mask table to contain a set of feedback polynomial masks. Respective feedback polynomial masks of the set correspond to respective spread-spectrum code signals of the plurality of spread-spectrum code signals. The adjustable code generator also includes control logic to select any of the feedback polynomial masks of the set contained in the feedback polynomial mask table, and further includes a shift register to provide, at an output, a respective spread-spectrum code signal that corresponds to a feedback polynomial mask selected by the control logic and to receive feedback generated using the feedback polynomial mask selected by the control logic.
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: August 14, 2012
    Assignee: Navcom Technology, Inc.
    Inventors: Jerry Eugene Knight, Charles R. Cahn, David Man Kui Li
  • Patent number: 8243777
    Abstract: A method and an apparatus for estimating a symbol timing offset in an Orthogonal Frequency Division Multiplexing (OFDM) based communication system are provided. A Carrier to Interference Ratio (CIR) of an Reference Signal (RS) is acquired using received pilot signals. The RS CIR includes power information on channel components of the RS. A CIR of a Secondary Synchronization Channel (S-SCH) is acquired using the received pilot signals. The S-SCH CIR includes power information on channel components of the S-SCH. Unnecessary channel components are suppressed from the RS CIR using the S-SCH CIR. Real channel components of the RS remain. An observation window is set having a predetermined duration for windowing the real channel components of the RS. A first arriving channel component is searched for within the observation window. A start point of data is estimated using the first arriving channel component.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: August 14, 2012
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Joo Yeol Yang, Hee Jin Roh
  • Patent number: 8238491
    Abstract: A device performs demodulation of control signals from multiple radio terminals, based on the correlations in the frequency domain between a predetermined code and the orthogonalized control signals and reference signals of the multiple radio terminals obtained by cyclic shifts of the predetermined code. The device includes: a demultiplexer which demultiplexes a reference signal component and a control signal component based on a correlation profile; a path detector which detects a path location or path locations for each radio terminal based on the power values of the reference signal components; extractor which extracts the correlation values of the reference signal components and the correlation values of the control signal components, respectively; and RAKE combiner which combines the extracted values.
    Type: Grant
    Filed: March 11, 2009
    Date of Patent: August 7, 2012
    Assignee: NEC Corporation
    Inventors: Kosuke Naito, Motoya Iwasaki
  • Patent number: 8238490
    Abstract: A method for determining a Doppler shift of a first signal is provided. First, a plurality of Doppler frequency hypotheses is combined to obtain a joint Doppler signal. The first signal is the correlated according to the joint Doppler signal and a plurality of code signals with phases corresponding to a series of code phase hypotheses to obtain a series of correlation results which are then examined to determine whether the Doppler shift does lie in the Doppler hypotheses. A fine Doppler search is then performed to determine the Doppler shift when the Doppler shift lies in the Doppler hypotheses.
    Type: Grant
    Filed: February 25, 2009
    Date of Patent: August 7, 2012
    Assignee: Mediatek Inc.
    Inventors: Hsin-Chung Yeh, Kuan-I Li
  • Patent number: 8233572
    Abstract: In a pulse-based communication system a transmitting device may generate a series of pulses to convey information via a communication medium to a receiving device. In some situations, interference from one or more interfering devices may alter the pulse energy as it is transmitted through the communication medium. To mitigate the effect of such interference, a receiving device may mark certain received pulses as erasures. In this way, such pulses may be ignored during the decoding operation of the receiver.
    Type: Grant
    Filed: September 25, 2007
    Date of Patent: July 31, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: David Jonathan Julian, Amal Ekbal
  • Patent number: 8223789
    Abstract: To prevent a collision from occurring at the time of random access in cases such as handover, response to paging and the like where a mobile station apparatus performs random access in response to directions from a base station apparatus. In a mobile communication system in which a mobile station apparatus 200 uses a signature of a beforehand determined signature group at the time of random access with a base station apparatus 100, the signature group is comprised of a signature group managed by the base station apparatus 100 and another signature group managed by the mobile station apparatus 200. The signature group managed by the base station apparatus 100 includes signatures associated with particular random access reasons to be selected by the base station apparatus 100.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: July 17, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yasuyuki Kato, Shohei Yamada, Wahoh Oh
  • Publication number: 20120163421
    Abstract: A receiver for receiving a signal, the signal conforming to a protocol such that the signal comprises a synchronising portion and a data portion, each portion comprising pulses located in respective time slots, the time offsets between successive time slots being defined by the protocol, the receiver comprising: a detector configured to detect a first pulse and a second pulse of the synchronising portion; a comparison module configured to compare the time offset between the first and second pulses to a corresponding time offset defined by the protocol so as to determine the relationship between the detected time offset and the corresponding time offset; a determination module configured to determine expected times of arrival of the time slots of the data portion using the determined relationship and the time offsets defined by the protocol; and a data reader configured to read data conveyed in the data portion at the expected times of arrival.
    Type: Application
    Filed: July 2, 2010
    Publication date: June 28, 2012
    Applicant: UBISENSE LIMITED
    Inventor: Andrew Martin Robert Ward
  • Patent number: 8208518
    Abstract: An electronic synchronous/asynchronous transceiver device for power line communication networks is integrated into a single chip and operates from a single supply voltage. The transceiver device includes: at least an internal register that is programmable through a synchronous serial interface; at least a line driver for a two-way network communication over power lines implemented by a single ended power amplifier with direct accessible input and output lines that is part of a tunable active filter for the transmission path; and at least a couple of linear regulators for powering with different voltage levels different kind of external controllers linked to the transceiver device.
    Type: Grant
    Filed: September 16, 2008
    Date of Patent: June 26, 2012
    Assignees: STMicroelectronics S.r.l., Dora S.p.A.
    Inventors: Roberto Cappelletti, Giuseppe Cantone, Barbara Antonelli, Antonello Castigliola, Alessandro Lasciandare, Vincenzo Marano
  • Patent number: 8195204
    Abstract: A mobile station will sort wireless coverage sectors in order of distance of the sectors from the mobile station, and the mobile station will then scan for pilot signals from the sectors in the sorted order. The invention can be applied advantageously to provide an order of scanning remaining set sectors in a mobile station operating according to a code division multiple access protocol.
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: June 5, 2012
    Assignee: Sprint Spectrum L.P.
    Inventors: Manoj Shetty, Sachin R. Vargantwar, Siddharth S. Oroskar, Ashvini G. Canjeevaram, DeveshKumar Rai
  • Patent number: 8194621
    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: June 16, 2011
    Date of Patent: June 5, 2012
    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: 8189646
    Abstract: A spread-spectrum signal comprises a spreading waveform modulating a carrier wave and containing a real linear combination of a first waveform at a first waveform rate and a second waveform at a second waveform rate, the first waveform rate being distinct from the second waveform rate and both waveform rates being distinct and non-zero. The linear combination of the first and the second waveform is modulated with at least one binary sequence comprising a signal identification code.
    Type: Grant
    Filed: January 12, 2006
    Date of Patent: May 29, 2012
    Assignee: Centre National d'Etudes Spatiales
    Inventors: Lionel Ries, Jean-Luc Issler, Laurent Lestarquit, Jose-Angel Avila-Rodriguez, Guenter W. Hein
  • Patent number: 8184741
    Abstract: A receiving device includes: a first signal processor, for receiving a radio frequency signal, and converting the radio frequency signal to generate a first signal, where the radio frequency signal includes a plurality of frames; a second signal processor, coupled to the first signal processor, for performing a Fourier transform operation on the first signal according to a synchronization signal to generate an output signal; a first filter, coupled to the first signal processor, for filtering the first signal to generate a second signal; and a synchronization detection circuit, coupled to the first filter, for detecting the second signal to generate the synchronization signal. The first signal includes a channel signal and at least a portion of neighboring channel signals from neighboring channels, and the output signal corresponds to the channel signal.
    Type: Grant
    Filed: April 9, 2008
    Date of Patent: May 22, 2012
    Assignee: Realtek Semiconductor Corp.
    Inventors: Wei-Hung He, Chin-Tai Chen
  • Publication number: 20120114015
    Abstract: Methods, systems, and apparatuses, including computer programs encoded on computer-readable media, for receiving a timing signal at a first access point, wherein the timing signal is also received at a second access point. A first time is synchronized at the first access point with a second time at the second access point based upon the received timing signal. The first access point is configured with a spreading code and a transmit frequency. The second access point is also configured with the spreading code and the transmit frequency. The spreading code of the first access point is synchronized with the spreading code of the second access point using the timing signal. A message is transmitted from the first access point to the node and from the second access point to the node.
    Type: Application
    Filed: January 23, 2012
    Publication date: May 10, 2012
    Inventors: Theodore J. Myers, Robert W. Boesel, Matthew Hughes
  • Patent number: 8175195
    Abstract: The invention relates to method and device for detecting propagation paths in pulse transmission, wherein a received signal comprises pulses on each time symbol. After synchronizing a pulse-based reception, the inventive method consists (A) in determining the arrival times of pulses of the same current time symbol, (B) in generating a path hypotheses by assigning an initial score to each dated pulse, (C) in determining the arrival times of pulses of the time symbol following the current symbol, (D) in relatively comparing the arrival times of pulses of the following time symbol with the arrival times of the path hypotheses and (E) in updating scores according to the relative comparison results. Said path detecting method is suitable for pulse information transmission, in particular in UWB.
    Type: Grant
    Filed: November 7, 2006
    Date of Patent: May 8, 2012
    Assignee: France Telecom
    Inventors: Jean Schwoerer, Benoît Miscopein
  • Patent number: 8175175
    Abstract: A method for rate-shaping media streams; the method includes: receiving multiple input media streams, transmission parameters, wired transmission limitations and wireless transmission limitations that represent a current status of a wireless medium; and rate-shaping at least one input media stream out of the multiple input media streams, in response to: (i) the transmission parameters, (ii) the wireless transmission limitations, and (iiii) input media stream parameters. A system for processing media streams; the system includes: a controller, adapted to determine rate-shaping parameters in response to: (i) the transmission parameters, (ii) the wireless transmission limitations, and (iii) input media stream parameters; and a rate-shaper, connected to the processor, adapted to receive multiple input media streams and perform rate-shaping according to the rate-shaping parameters.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: May 8, 2012
    Assignee: Aaris Group Inc.
    Inventors: Nery Strasman, Harold Roberts
  • Patent number: 8170082
    Abstract: Embodiments related to cross-talk mitigation are described and depicted.
    Type: Grant
    Filed: December 5, 2008
    Date of Patent: May 1, 2012
    Assignee: Infineon Technologies AG
    Inventor: Andreas Schmid
  • Patent number: RE43897
    Abstract: In a recording and reproducing apparatus for recording and reproducing video data, includes: a shuffling memory (6); a writing means for writing video data into the shuffling memory in accordance with the synchronizing signal and a write reference clock signal in synchronization with the video data; and a reading means for reading out the video data from the shuffling memory in accordance with a synchronizing signal and a stabilized read reference clock which is asynchronous with the write clock signal.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: January 1, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Shuji Saito, Eiichi Takakura