Having Specific Code Synchronization Patents (Class 375/149)
  • Patent number: 10560629
    Abstract: The various implementations described herein include methods, devices, and systems for implementing high dynamic range and automatic exposure functions in a video system. In one aspect, a method is performed at a video camera device and includes, while operating in an HDR mode: (1) capturing video data of a scene, including: (a) capturing a first subset of the video data with a first exposure time; and (b) capturing a second subset of the video data with a second exposure time, lower than the first exposure time; (2) combining video data of the first subset with video data of the second subset to generate an HDR frame; and (3) adjusting a duration of at least one of the first exposure time and the second exposure time based on one or more parameters of the captured video data, thereby altering a ratio of the first exposure time to the second exposure time.
    Type: Grant
    Filed: May 23, 2018
    Date of Patent: February 11, 2020
    Assignee: GOOGLE LLC
    Inventors: William Duran, Adrian Proca
  • Patent number: 10541837
    Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). The present invention relates to a method and apparatus for channel estimation in a wireless communication system. A method for operating a transmitter comprises the operations of: transmitting a first reference signal through a first antenna; and transmitting a second reference signal through a second antenna, wherein the first reference signal includes a first Golay sequence, and the second reference signal includes a second Golay sequence.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: January 21, 2020
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jongho Oh, Soon Chan Kwon, Daehoon Kim, Taeyeong Kim, Jungmin Yoon
  • Patent number: 10523487
    Abstract: Embodiments of the present invention provide a frame synchronization method and apparatus, which can reduce impact of a carrier frequency offset. In those embodiment, a solution is provided and the solution includes: obtaining a received signal of a receiving antenna; calculating an auto-correlation value of the received signal and determining a time corresponding to the auto-correlation value that is of the received signal and that meets a first preset condition, as an initial estimation time; obtaining a carrier frequency offset estimation value according to the initial estimation time, the received signal, and a frequency offset estimation algorithm, and performing frequency offset compensation on the received signal by using the carrier frequency offset estimation value; calculating a cross-correlation value and an auto-correlation value of the received signal on which the frequency offset compensation has been performed. The embodiments of the present invention are used for frame synchronization.
    Type: Grant
    Filed: November 2, 2016
    Date of Patent: December 31, 2019
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Huang Huang, Xi Yan, Sainan Li
  • Patent number: 10502837
    Abstract: The present disclosure describes apparatuses and techniques for measuring position and velocity. In some aspects, Global Navigation Satellite System (GNSS) signals and feedback information are received. The feedback information may include predicted code phase information and predicted Doppler information. The feedback information is used to define a LOS region of a search space, the search space having dimensions in a code phase domain and in a Doppler domain. The GNSS signals within the search space are operated on to produce measurements of the GNSS signals across the code phase domain and the Doppler domain of the search space. The produced measurements are operated on within the LOS region of the search space to select measurements associated with a line of sight (LOS) signal. The selected measurements are operated on to produce position and/or velocity information associated with the LOS signal.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: December 10, 2019
    Assignee: Marvell International Ltd.
    Inventors: Peng Xie, Zhike Jia, Paul A. Lambert
  • Patent number: 10412752
    Abstract: Methods, systems, computer-readable media, and apparatuses for to managing use of a satellite positions system (SPS) receiver in conjunction with one or more radio access technology (RAT) transmitters. In certain embodiments, a controller can be used to prioritize reception by the SPS receiver over transmission by the one or more RAT transmitters.
    Type: Grant
    Filed: January 9, 2017
    Date of Patent: September 10, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Jie Wu, Chun-Hao Hsu, Liang Zhao, Parvathanathan Subrahmanya, Amit Mahajan, Nitin Pant, Vieri Vanghi
  • Patent number: 10356715
    Abstract: The present invention provides a DRX control method and system in which power consumption of a mobile station can be reduced and an increase in the load of a network can be suppressed. A source base station forwards Dormancy Context, which is information for controlling the activity level of a mobile station that performs inter base station handover, to a target base station and, immediately after the mobile station completes handover, the target base station performs DRX control of the mobile station using the Dormancy Context.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: July 16, 2019
    Assignee: NEC CORPORATION
    Inventors: Hisashi Futaki, Jinsock Lee
  • Patent number: 10331804
    Abstract: A system for testing at least a first automatic control device via a plant model includes: a first subsystem; and a second subsystem which is spatially separated from the first subsystem. The plant model comprises an executable first model code and an executable second model code. The first subsystem comprises a first time-signal processing component configured to electronically assign a first time signal (Ts1) from a global time source to a first event. The first model code is configured to provide a first calculation result based on the first event. The second subsystem comprises a second time-signal processing component configured to electronically assign a second time signal (Ts2) from the global time source to a second event. The second model code is configured to provide a second calculation result based on the second event.
    Type: Grant
    Filed: April 13, 2016
    Date of Patent: June 25, 2019
    Assignee: DSPACE DIGITAL SIGNAL PROCESSING AND CONTROL ENGINEERING GMBH
    Inventors: Andreas Himmler, Matthias Klemm
  • Patent number: 10326462
    Abstract: Methods and systems for time interleaved analog-to-digital converter timing mismatch calibration and compensation may include receiving an analog signal on a chip, converting the analog signal to a digital signal utilizing a time interleaved analog-to-digital-converter (ADC), and reducing a blocker signal that is generated by timing offsets in the time interleaved ADC by estimating complex coupling coefficients between a desired digital output signal and the blocker signal utilizing a decorrelation algorithm on frequencies within a desired frequency bandwidth. The decorrelation algorithm may comprise a symmetric adaptive decorrelation algorithm. The received analog signal may be generated by a calibration tone generator on the chip. An aliased signal may be summed with an output signal from a multiplier. The complex coupling coefficients may be determined utilizing the decorrelation algorithm on the summed signals.
    Type: Grant
    Filed: October 8, 2018
    Date of Patent: June 18, 2019
    Assignee: Maxlinear, Inc.
    Inventors: Pawandeep Taluja, Mingrui Zhu, Xuefeng Chen, Anand Anandakumar, Sheng Ye, Timothy Gallagher
  • Patent number: 10321396
    Abstract: The present invention provides a DRX control method and system in which power consumption of a mobile station can be reduced and an increase in the load of a network can be suppressed. A source base station forwards Dormancy Context, which is information for controlling the activity level of a mobile station that performs inter base station handover, to a target base station and, immediately after the mobile station completes handover, the target base station performs DRX control of the mobile station using the Dormancy Context.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: June 11, 2019
    Assignee: NEC CORPORATION
    Inventors: Hisashi Futaki, Jinsock Lee
  • Patent number: 10305651
    Abstract: Systems, methods and instrumentalities are disclosed for superposed signaling for bandwidth efficiency in wireless communications. Homogeneous and heterogeneous signals may be superposed on the same channel. Superposed signals may comprise, for example, multi carrier, frequency division and code division signals, including multiple access, e.g., OFDMA and CDMA, signals. Data for various receivers may be dynamically selected for signal superpositioning, for example, based on radio access technology, communication rate (e.g. high and low rates), distance between transmitter and receiver (e.g. near and far signals). Communication rate and power may be allocated to superposed signals. Interference nulling may be applied, for example, by selecting or excluding spreading codes and/or subcarriers. Nulled locations may be used to transmit critical information. Interference shaping may be applied to modify interference, e.g., by transmitting interference symbols using reserved spreading codes. Support information, e.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: May 28, 2019
    Assignees: University of South Florida, IDAC Holdings, Inc.
    Inventors: Ertugrul Guvenkaya, Rui Yang, Erdem Bala, Huseyin Arslan
  • Patent number: 10257325
    Abstract: Provided is a method and apparatus of a receiver. The method and apparatus include generating a macro sequence of a length using a complementary-symmetry property. The method and apparatus also obtain a preamble sequence for a communication mode based on the macro sequence.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: April 9, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chandrashekhar Thejaswi Ps, Kiran Bynam, ChangSoon Park, Young-Jun Hong, Manoj Choudhary
  • Patent number: 10256968
    Abstract: A clock and data recovery (CDR) circuit includes a phase detector, a digital loop filter, and a lock detector. The phase detector generates a phase detect result signal in response to phase detection of a plurality of samples. The plurality of samples are generated by sampling a received signal based on a sampling clock a sampling clock provided by a phase interpolator. The digital loop filter includes a phase path and a frequency path for providing a phase path correction signal and a frequency path correction signal based on the phase detect result signal respectively. A phase interpolator code generator generates a phase interpolator code for controlling the phase interpolator based on the phase path correction signal and frequency path correction signal. The lock detector generates a lock condition signal based on the frequency path correction signal, the lock condition signal indicating a lock condition of the CDR circuit.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: April 9, 2019
    Assignee: XILINX, INC.
    Inventors: Zhaoyin D. Wu, Yu Xu, Winson Lin, Yohan Frans, Geoffrey Zhang
  • Patent number: 10191158
    Abstract: A receiver, and associated process, for tracking a GNSS positioning signal comprising a carrier modulated by a subcarrier and a spreading code, the receiver comprising: at least one tracking loop configured to calculate a first pseudo range from said GNSS positioning signal, a first discrimination circuit (521) configured to calculate an ambiguous discriminator value from the subcarrier and the spreading code of said GNSS positioning signal, a calculation circuit (522) configured to calculate a value representative of a tracking error of said tracking loop, a second discrimination circuit (530) configured to select one of said ambiguous discriminator value and said value calculated by the calculation circuit, and to generate a first non-ambiguous discriminator value, an amplitude of which is based on an amplitude of the selected value, and a sign of which is a sign of said value calculated by the calculation circuit.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: January 29, 2019
    Assignee: CENTRE NATIONAL D'ETUDES SPATIALES
    Inventors: Nabil Jardak, Willy Vigneau, Fran├žois-Xavier Marmet, Lionel Ries
  • Patent number: 10165536
    Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may identify a set of non-overlapping periodic intervals for monitoring a synchronization signal, which may be composed of or may include a repeated sequence; and the UE may identify possible timing structure (e.g., subframe, slot, etc.) boundaries using the intervals. The UE may then determine that one of the possible boundaries is a boundary using a second synchronization signal. For instance, the UE may perform a cumulative correlation during each of a series of correlation periods corresponding to the periodic intervals. Each of the cumulative correlations may contain multiple coherent correlations associated with the sequence repetitions. From the cumulative correlations, the UE may identify possible boundaries. The UE may perform a secondary correlation based on a second synchronization signal for each possible boundary in order to determine the system timing.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: December 25, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Michael Mao Wang, Hao Xu, Peter Gaal, Wanshi Chen, Yongbin Wei
  • Patent number: 10101463
    Abstract: A correlation processing method includes generating a correlation code in which a code value of a chip boundary period is set to a value of a replica code, and a code value of a chip center period other than the chip boundary period is set to a predetermined value, and performing a correlation calculation with respect to the correlation code and a received code signal obtained by demodulating a received signal from a positioning satellite.
    Type: Grant
    Filed: February 11, 2016
    Date of Patent: October 16, 2018
    Assignee: Seiko Epson Corporation
    Inventor: Hiroki Yoshioka
  • Patent number: 10070465
    Abstract: An apparatus for reception and detection of RACH data in an LTE input signal includes a hardware accelerator that has a decimator that filters and down-samples the input signal, a first Fourier transform circuit that transforms the decimated signal from the time domain to the frequency domain, and a second transform circuit that multiplies the resulting signal by a complex Z-C sequence and performs an inverse Fourier transform (iFT) operation to transform the multiplied signal from the frequency domain to the time domain. A DSP performs a delay profile analysis operation on the signal resulting from the iFT operation.
    Type: Grant
    Filed: December 20, 2015
    Date of Patent: September 4, 2018
    Assignee: NXP USA, INC.
    Inventors: Girraj K. Agrawal, Arvind Kaushik, Vincent Martinez, Amrit P. Singh
  • Patent number: 10009928
    Abstract: A method can be used for facilitating a random access procedure between a first transceiver and a second transceiver within a cell. The first transceiver selects a signature sequence from a set of signature sequences, incorporates the signature sequence into a signal, and transmits the signal to the second transceiver. The set of signature sequences being obtained from a Zadoff-Chu sequence with zero correlation zone.
    Type: Grant
    Filed: January 26, 2016
    Date of Patent: June 26, 2018
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Branislav Popovic, Oskar Mauritz
  • Patent number: 9999045
    Abstract: A wireless network management method for a wireless network is provided. A length parameter of a slotframe is evaluated by considering an advertisement requirement and/or a data transmission requirement of the wireless network. The length parameter of the slotframe is adjusted to be relatively prime to a total number of available channels. At least one timeslot within the slotframe is assigned for matching the advertisement and/or the data transmission requirements, and the timeslot assignment of the slotframe is advertised.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: June 12, 2018
    Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Ming-Che Chen, Yung-Ching Huang
  • Patent number: 9980197
    Abstract: A method of operating a baseband processing unit for a wake-up receiver. The method includes receiving a signal from a transmitting device that contains a pseudo-random code. The method further includes adding a local pseudo-random code associated with a first correlator of the processing unit with a local pseudo-random code associated with a second correlator of the processing unit to generate a summed local pseudo-random code, and correlating by the first correlator the received pseudo-random code with the summed local pseudo-random code. The method still further includes comparing an output of the first correlator with a predetermined threshold, and determining whether or not to generate a wake-up signal based on the comparison. A baseband processing unit for performing this methodology is also provided.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: May 22, 2018
    Assignee: The Regents of The University of Michigan
    Inventors: Nan Zheng, Pinaki Mazumder
  • Patent number: 9859991
    Abstract: Radiofrequency communication device comprising at least one TORP signal generation circuit, the TORP signal corresponding to oscillations trains periodically repeated at a frequency FPRP for which the oscillation frequency is FOL>FPRP and for which each oscillations train lasts for a duration of less than 1/FPRP, and at least one multiplier circuit for which an input is coupled to an output of said at least one TORP signal generation circuit such that it is capable of multiplying the TORP signal with a baseband signal comprising at least one of information intended to be transmitted by the radiofrequency communication device and a radiofrequency signal intended to be received by the radiofrequency communication device.
    Type: Grant
    Filed: July 7, 2015
    Date of Patent: January 2, 2018
    Assignee: Commissariat a l'energie atomique et aux energies alternatives
    Inventors: Clement Jany, Alexandre Siligaris
  • Patent number: 9844064
    Abstract: The disclosure is directed to an interference reduction method used by a base station, and a base station using the same method. In one of the exemplary embodiments, the disclosure is directed to an interference reduction method used by a base station. The method would include not limited to: receiving a first reference signal information associated with an interfering transmitter node; creating a cross-correlation matrix based at least on the first reference signal information and on a second reference signal information, wherein the second reference signal information is associated with an intended transmitter node; and generating an improved channel transfer function by applying the cross-correlation matrix to an estimated channel transfer function, wherein the estimated channel transfer function is associated with a received transmission from the intended transmitter node, and the improved channel transfer function is associated with the received transmission from the intended transmitter node.
    Type: Grant
    Filed: January 16, 2017
    Date of Patent: December 12, 2017
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Murat Karsi, Kenneth L. Stanwood, David Gell
  • Patent number: 9832062
    Abstract: An IS-OFDM system for point-to-point wireless communications that suppresses narrow-band interference comprises an IS-OFDM transmitter and an IS-OFDM receiver, wherein a transmitted signal comprises a plurality of subcarriers, and further wherein each subcarrier contains more than one and potentially all symbols transmitted in a given frame. The IS-OFDM transmitted signal is at a data rate that is equal to the data rate of the input data stream via the use of P/S converters.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: November 28, 2017
    Assignee: AT&T Intellectual Property II, L.P.
    Inventor: Diakoumis Parissis Gerakoulis
  • Patent number: 9814040
    Abstract: Methods, systems, and devices for wireless communication are described. In some examples, a wireless system may use a staggered uplink/downlink (UL/DL) format in which the symbol periods of the downlink are offset from the symbol periods of the uplink. Thus, if a user equipment (UE) receives a transmission in a first symbol period, it may decode the transmission and transmit a response in a staggered symbol period (e.g., in a UL control channel symbol period beginning one half of a symbol period after the first symbol period). A base station may then receive the response and, if it is a negative acknowledgement (NACK), retransmit during the third symbol period following the first symbol period. In another example, thin control channels may be used to reduce the round trip time between receiving a transmission and a retransmission.
    Type: Grant
    Filed: June 25, 2015
    Date of Patent: November 7, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Naga Bhushan, Jing Jiang, Tingfang Ji, Krishna Kiran Mukkavilli, Joseph Binamira Soriaga, John Edward Smee
  • Patent number: 9749939
    Abstract: An apparatus includes a memory configured to store a first program for executing a cell search process on data transmitted from another wireless device, and a second program for executing a demodulation process and/or a decoding process after the cell search process. The apparatus includes a first processor configured to execute the first program, and a second processor configured to execute the second program. The apparatus loads the first program stored in the memory in the first processor. When the first processor is requested to perform the cell search process by executing the first program, the apparatus loads the first program in the second processor, and executes the cell search process on the data in a parallel manner by causing the first and second processors to execute the first program.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: August 29, 2017
    Assignee: FUJITSU LIMITED
    Inventor: Daisuke Sakai
  • Patent number: 9548857
    Abstract: Embodiments herein describe techniques for synchronizing LFSRs located on two compute devices. To synchronize the LFSRs, a first one of the compute devices may transmit a first training block that includes a predefined bit sequence. The training block is scrambled by a transmitting (TX) LFSR on the first compute device and then transmitted to the second compute device. The second compute device performs an XOR operation to recover the outputs of the TX LFSR that were used to scramble the data. The second compute device can use the outputs of the TX LFSR to determine future outputs of the TX LFSR. These future outputs are then used to initialize a receiving (RX) LFSR on the second compute device. Now, when subsequent training blocks are received, the second compute device can use the initialized RX LFSR to descramble the scrambled training blocks.
    Type: Grant
    Filed: August 24, 2015
    Date of Patent: January 17, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Paul A. Ganfield
  • Patent number: 9515813
    Abstract: Embodiments herein describe techniques for synchronizing LFSRs located on two compute devices. To synchronize the LFSRs, a first one of the compute devices may transmit a first training block that includes a predefined bit sequence. The training block is scrambled by a transmitting (TX) LFSR on the first compute device and then transmitted to the second compute device. The second compute device performs an XOR operation to recover the outputs of the TX LFSR that were used to scramble the data. The second compute device can use the outputs of the TX LFSR to determine future outputs of the TX LFSR. These future outputs are then used to initialize a receiving (RX) LFSR on the second compute device. Now, when subsequent training blocks are received, the second compute device can use the initialized RX LFSR to descramble the scrambled training blocks.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: December 6, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Paul A. Ganfield
  • Patent number: 9497020
    Abstract: Embodiments herein describe techniques for synchronizing LFSRs located on two compute devices. To synchronize the LFSRs, a first one of the compute devices may transmit a first training block that includes a predefined bit sequence. The training block is scrambled by a transmitting (TX) LFSR on the first compute device and then transmitted to the second compute device. The second compute device performs an XOR operation to recover the outputs of the TX LFSR that were used to scramble the data. The second compute device can use the outputs of the TX LFSR to determine future outputs of the TX LFSR. These future outputs are then used to initialize a receiving (RX) LFSR on the second compute device. Now, when subsequent training blocks are received, the second compute device can use the initialized RX LFSR to descramble the scrambled training blocks.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: November 15, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Paul A. Ganfield
  • Patent number: 9396789
    Abstract: A memory control device includes a plurality of delay circuits to set a delay value for each terminal of a memory, each of the plurality of delay circuits being connected to a terminal of the memory. Further, the memory control device includes a first register to store a first DLL value output by a delay locked loop circuit, a plurality of second registers to store a first setting value to set the delay value for the each terminal of the memory, each of the plurality of second registers being connected to a delay circuit of the plurality of delay circuits, and a delay controller to calculate a second setting value based on the first DLL value, a second DLL value output by the delay locked loop circuit after the first DLL value, and the first setting value, and to update the first setting value to the second setting value.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: July 19, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventor: Keiichi Iwasaki
  • Patent number: 9391658
    Abstract: Systems and methods for reducing interference caused by leakage of signals generated by a spread spectrum phase lock loop (SS PLL). The system and method uses a sinusoidal spreading signal to spread the output of a SS PLL. A notch filter tracks the frequency of the output of the SS PLL to steer the notch in the filter to the instantaneous frequency output from the SS PLL, thus allowing the notch filter to be placed in the path of signals that have unwanted leakage from the SS PLL.
    Type: Grant
    Filed: June 4, 2014
    Date of Patent: July 12, 2016
    Assignee: ENTROPIC COMMUNICATIONS, LLC
    Inventors: Chi-ping Nee, Branislav Petrovic
  • Patent number: 9281864
    Abstract: A system that incorporates teachings of the subject disclosure may include, for example, a method for scanning a radio frequency spectrum for an available frequency band, selecting an available frequency band in the radio frequency spectrum even if the available frequency band is affected by radio frequency interference, measuring a signal strength in portions of the available frequency band, correlating the signal strength of each portion to generate a correlation factor, detecting radio frequency interference in the available frequency band according to the correlation factor, and generating tuning coefficient data to cause the filter apparatus to substantially suppress the radio frequency interference in the available frequency band. Other embodiments are disclosed.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: March 8, 2016
    Assignee: ISCO International, LLC
    Inventors: Amr Abdelmonem, Sean S. Cordone
  • Patent number: 9270388
    Abstract: A method and apparatus for impulse noise mitigation. In one embodiment, the method comprises identifying one or more impulse noise affected samples of a communication signal transmitted via power line communications; creating, based on the identified one or more impulse-noise affected samples, one or more erasures; and adaptively controlling a correlation threshold for packet preamble detection, wherein the correlation threshold is adaptively controlled based on the one or more erasure.
    Type: Grant
    Filed: March 23, 2015
    Date of Patent: February 23, 2016
    Assignee: Enphase Energy, Inc.
    Inventors: Zvi Bernstein, Kennan Laudel, Madhavi Anugu
  • Patent number: 9236903
    Abstract: A method for detecting multi-path interference in a spread-spectrum signal. A variation of a first signal and a variation of a second signal is compared. The variation of the first signal corresponds to a correlation of the spread-spectrum signal and a spreading code having a first offset. The variation of the second signal corresponds to a correlation of the spread-spectrum signal and the spreading code having a second offset. Multi-path interference is detected in dependence on the comparison.
    Type: Grant
    Filed: July 12, 2012
    Date of Patent: January 12, 2016
    Assignee: STMICROELECTRONICS (RESEARCH & DEVELOPMENT) LIMITED
    Inventor: Philip Mattos
  • Patent number: 9148323
    Abstract: According to embodiments of the present invention, a transmitter is provided. The transmitter includes a frequency shift keying (FSK) circuit, and a phase shift keying (PSK) circuit coupled in series to the FSK circuit, wherein the FSK circuit is configured, in a first mode of operation, to provide a FSK modulated signal to the PSK circuit, and, in a second mode of operation, to provide a fixed frequency signal to the PSK circuit, and wherein the PSK circuit is configured, in the first mode of operation, to transmit the FSK modulated signal, and, in the second mode of operation, to provide a PSK modulated signal based on the fixed frequency signal received from the FSK circuit.
    Type: Grant
    Filed: September 9, 2013
    Date of Patent: September 29, 2015
    Assignee: Agency for Science, Technology and Research
    Inventors: San Jeow Cheng, Yuan Gao, Chun Huat Heng
  • Patent number: 9124339
    Abstract: Methods and systems are provided for loop-through for multi-chip communication systems. Receiver circuitry, that is operable to receive one or more input feeds, may comprise a plurality of chips, each of which may be configurable to generate a corresponding output comprising one or more feed elements (e.g., channels) extracted from the input feed(s). However, only a first chip may be operable to handle reception and/or initial processing of the one or more input feeds, with each one of the remaining chips processing a loop-through feed generated by the first chip, in order to generate the corresponding output of that chip. The first chip generates the loop-through feed based on the one or more input feeds, such as after the initial processing thereof in the first chip. Generating the loop-through feed may comprise applying channelization (e.g., separately for each remaining chip), switching based processing, and/or interfacing based processing.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: September 1, 2015
    Assignee: MAXLINEAR, INC.
    Inventors: Glenn Chang, Sridhar Ramesh, Curtis Ling
  • Patent number: 9083446
    Abstract: Method and receiver for processing a signal in a wireless communication system in which the signal comprises a sequence of chips. The signal is receive data at least one rake finger and sampled. There is a time spacing t1 between successive samples less than the time spacing tc between successive chips in the signal. Channel conditions on the channel are estimated and based on estimated channel conditions by the following steps: monitoring timing of the signal on one of the at least one rake finger to determine a time difference between the timing of the signal on the one of the at least one rake finger and the timing of the generation of the samples, the determined time difference being a multiple of t2, where t2<t1; aligning the timing of the generation of the samples with the timing of the signal on the one of the at least one rake finger to within a timing range t2.
    Type: Grant
    Filed: September 23, 2010
    Date of Patent: July 14, 2015
    Assignee: ICERA INC.
    Inventors: Steve Allpress, Steve Felix, Abdelkader Medles
  • Patent number: 9071342
    Abstract: In accordance with the teachings described herein, system and methods are provided for a GPS acquisition correlation scheme with a reduced memory requirement. An example system may include a memory, a local PRN code generator, correlators, adder trees, an accumulator, and an output memory. The memory may be used to store an input PRN code. The local PRN code generator generates a replica PRN code and outputs a replica PRN code. The local PRN code generator may also shift the replica PRN code for each output epoch. One or more correlators receive the input PRN code and the replica PRN code and compare a bit of the input PRN code to a bit of the replica PRN code and generates a comparison. The adder trees add the comparisons and generate a comparison output. An accumulator accumulates the comparison output and outputs an accumulated output to an output memory.
    Type: Grant
    Filed: April 7, 2011
    Date of Patent: June 30, 2015
    Assignee: MARVELL INTERNATIONAL LTD.
    Inventors: Xiangdong Jin, Mao Yu, Chi-Yuen Young
  • Patent number: 9066257
    Abstract: Some aspects of the present disclosure relate to a method for accurately detecting and measuring signals received from multiple cells surrounding a user equipment (UE) during a cell search. The method is performed by receiving a composite signal comprising an aggregate of transmissions (e.g., synchronization signals) from a plurality of base stations at a UE. A correlation-based metric describing a cell is generated by performing a cross-correlation of a transmission (e.g., synchronization signal, reference signal, etc.) from the cell with the received composite signal. The correlation-based metric of weaker cells may be modified to generate an equivalent ideal metric, also proportional to the search criteria, in which the impact of interfering signals is suppressed. By suppressing the impact of the interfering signals, the equivalent ideal metric can be used to identify a weaker target signal in light of the eclipsing, stronger signals.
    Type: Grant
    Filed: April 12, 2012
    Date of Patent: June 23, 2015
    Assignee: Intel Mobile Communications GmbH
    Inventors: Wen Xu, Xiaojun Ma
  • Publication number: 20150139281
    Abstract: A synchronization device and a synchronization method for use in a receiver are provided. The receiver receives a signal from a transmitter. The synchronization device generates a plurality of first pseudo noise codes in sequence according to a first code phase sequence and generates a plurality of second pseudo noise codes in sequence according to a second code phase sequence which is the reverse of the first code phase sequence, simultaneously. Every time a first pseudo noise code and a second pseudo noise code are generated, the synchronization device makes a correlation calculation for the first pseudo noise code, the second pseudo noise code and the signal. The synchronization device further determines a code phase according to the correlation calculations, and synchronizes with the signal according to the code phase. The synchronization method is applied to the synchronization device to implement the operations.
    Type: Application
    Filed: November 26, 2013
    Publication date: May 21, 2015
    Applicant: Institute For Information Industry
    Inventors: Jan-Shin HO, Wei-Shing WANG
  • Patent number: 9036681
    Abstract: Linear symbol level equalisation is used to estimate a transmitted symbol vector xn(0) in an nth observation window yn of signals received from multiple users each using a different spreading code. An iterative conjugate gradient algorithm resolves a column vector z that satisfies Az=b, A being a square matrix and b being a column vector. The matrix vector product Apk used in each respective kth iteration of the algorithm is computed using at least one fast transform. The receiver or detector estimates a posterior mean {circumflex over (x)}LMMSE,n(0) from the computed column vector z, then utilises the estimated posterior mean to determine the transmitted symbol vector xn(0). The posterior mean {circumflex over (x)}LMMSE,n(0) may be estimated from matrix A and vector b. Different examples have the square matrix A with an inner or an outer product form; and have the fast transform as a fast Walsh-Hadamard transform and/or a fast (inverse) Fourier transform.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: May 19, 2015
    Assignee: BROADCOM CORPORATION
    Inventor: Lars Puggaard Bogild Christensen
  • Patent number: 9036682
    Abstract: A method for mitigating a multi-path-induced error in a global navigation satellite system comprises, for a respective measurement epoch, obtaining respective representations of a composite signal including a plurality of value-pairs of the composite signal. The method further comprises, with respect to the measurement epoch: obtaining a plurality of coefficients for a set of linear equations based on the plurality of value-pairs of the composite signal; iteratively obtaining solutions for the set of linear equations, thereby solving for a code tracking timing offset, a time delay of a multi-path signal of the composite signal relative to its direct-path signal, and orthogonal representations of the multi-path signal; determining a phase error between the composite signal and the direct-path signal, due to the time delay, in accordance with the orthogonal representations of the multi-path signal; and correcting for the code tracking timing offset and the phase error.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: May 19, 2015
    Assignee: DEERE & COMPANY
    Inventors: Richard G. Keegan, Ronald R. Hatch
  • Patent number: 9030342
    Abstract: An integrated circuit includes a component calculator configured to compute at least one component value of a highly programmable analog-to-digital converter (ADC) from at least one application parameter, and a mapping module configured to map the component value to a corresponding register setting of the ADC based on at least one process parameter, wherein the integrated circuit produces digital control signals capable of programming the ADC. In a specific embodiment, the component calculator uses an algebraic function of a normalized representation of the application parameter to approximately evaluate at least one normalized ADC coefficient. The component value is further calculated by denormalizing the normalized ADC coefficient. In another specific embodiment, the component calculator uses an algebraic function of the application parameter to calculate the component value.
    Type: Grant
    Filed: July 18, 2013
    Date of Patent: May 12, 2015
    Assignee: Analog Devices Global
    Inventors: Kevin Cao-Van Lam, Richard E. Schreier, Donald W. Paterson
  • Patent number: 9008155
    Abstract: Acquiring a satellite signal, by, receiving a CDMA-modulated signal; generating a plurality of CDMA-type test signals comprising a reference test signal having a first chip duration, and a plurality of test signals delayed/anticipated of a corresponding time offset from the respective test reference signal, less than the chip duration; calculating correlations between the CDMA-modulated signal and the plurality of test signals for obtaining a plurality of correlation results; selecting, based on the correlation results, acquisition parameters associated to a candidate satellite signal; acquiring or rejecting the acquisition parameters selected based on the correlation results.
    Type: Grant
    Filed: May 29, 2014
    Date of Patent: April 14, 2015
    Assignee: STMicroelectronics S.r.l.
    Inventor: Domenico Di Grazia
  • Publication number: 20150098494
    Abstract: There is provided a method of determining the position of a device using a satellite positioning system, the method comprising (a) operating a satellite positioning system receiver in the device to collect a plurality of sets of signals; and, when the position of the device is to be determined (b) processing a set of signals to determine if the set is likely to contain signals from satellites in the satellite positioning system; and (c) if it is determined in step (b) that the set of signals is likely to contain signals from satellites in the satellite positioning system, processing the set of signals to calculate the position of the device; (d) if it determined in step (b) that the set of signals is not likely to contain signals from satellites in the satellite positioning system, repeating steps (b), (c) and (d) with another set of signals.
    Type: Application
    Filed: June 7, 2013
    Publication date: April 9, 2015
    Inventor: Wilhelmus Andreas Marinus Arnoldus Maria Van Den Dungen
  • Patent number: 9001868
    Abstract: Systems and methods for enhancing numerically controlled oscillators are provided. In certain embodiments, a numerically controlled oscillator enhancer includes a desired rate interface configured to receive a desired numerically controlled oscillator rate from an external device and a closest quantized rate identifier configured to identify a closest quantization rate that is closest to the desired numerically controlled oscillator rate. Further, the numerically controlled oscillator enhancer includes a quantization rate corrector configured to identify the quantization rate correction that, when applied to the closest quantization rate, constrains an accumulated quantization error within an error range and a rate output configured to output a corrected quantized numerically controlled oscillator rate.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: April 7, 2015
    Assignee: Honeywell International Inc.
    Inventors: Martin Orejas, Ondrej Kutik
  • Publication number: 20150091754
    Abstract: A method of tracking a code phase includes configuring local correlators with a first de-spreading local function; de-spreading an incoming signal with the first de-spreading local function to generate a first correlation output; determining a range estimate based on the first de-spreading local function; reconfiguring the local correlators with a second de-spreading local function when a delay-locked loop has locked to a correct correlation peak of the first correlation output; de-spreading the incoming signal with the second de-spreading local function to generate a second correlation output; determining a range estimate based on the second de-spreading local function that has a higher resolution than the range estimate based on the first de-spreading local function; and determining if the delay-locked loop has lost a lock to the correct correlation peak of the second correlation output to determine that the local correlators need to be reconfigured with the first de-spreading local function.
    Type: Application
    Filed: October 18, 2013
    Publication date: April 2, 2015
    Applicant: Broadcom Corporation
    Inventors: Jaleh KOMAILI, Charles NORMAN, Andreas WARLOE
  • Patent number: 8995419
    Abstract: Methods and apparatus are provided for facilitating synchronization between a base station (BS) and a user equipment (UE) in a mobile communication system. The UE receives a synchronization signal originated by the BS. The synchronization signal is encoded with a selected cyclically permutable (CP) codeword. The selected CP codeword is selected from a set of CP codewords. Encoding of the synchronization signal is facilitated by a repetitive cyclically permutable (RCP) codeword derivable from the selected CP codeword. The RCP codeword has a plurality of codeword elements each associated with a value, the value of at least one codeword element in the RCP codeword being repeated in another codeword element position in the RCP codeword. And the synchronization signal is decoded in accordance with repetitive structure of the RCP codeword.
    Type: Grant
    Filed: December 21, 2013
    Date of Patent: March 31, 2015
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Fredrik Berggren
  • Publication number: 20150078421
    Abstract: The device for receiving signals which have carrier frequencies and codes, said signals being navigation or communication signals, has multiple individual antennas (114) for receiving a signal, each individual antenna (114) having an antenna output (116) at which the received signal is present. Furthermore, the device is provided with an analog preprocessing unit (122) for preprocessing the signals received by the individual antennas (114), said preprocessing unit (122) having signal transmitting and signal preprocessing channels (124) which are assigned to the individual antennas (114), and the device is provided with a digital signal processor (134). The device additionally has a calibration signal generating unit (148) for generating a calibration signal which, like the signals received by the individual antennas (114), has a carrier frequency and a code and which is used for calibrating the propagation time and the phase of the signal transmission paths.
    Type: Application
    Filed: April 9, 2013
    Publication date: March 19, 2015
    Inventors: Michael Meurer, Manuel Cuntz
  • Patent number: 8982998
    Abstract: A transmission apparatus includes a plurality of orthogonal frequency division multiplexing (OFDM) modulation signal generators, which generate a first OFDM modulation signal and a second OFDM modulation signal. The transmission apparatus also includes a transmitter that transmits the first OFDM modulation signal from a first antenna and the second OFDM modulation signal from a second antenna, in an identical frequency band.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: March 17, 2015
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Yutaka Murakami, Masayuki Orihashi, Akihiko Matsuoka
  • Patent number: 8976842
    Abstract: A method of detecting PN code synchronization for a DSSS signal comprising receiving a DSSS data signal of data frames comprised of I and Q symbols, at least a portion of each data frame comprising a unique word, demodulating the data signal into I and Q chip samples, filtering the I and Q chip samples and outputting the filtered I and Q chip samples to a chip stream controller which outputs the plurality of chip streams to a correlation matrix that correlates the plurality of chip streams with the chipped unique word and outputs a correlated data stream. A plurality of FFTs is run on the correlated output data stream and a processor searches for a maximum frequency bin power of each FFT. A PN synchronization detector searches for a maximum frequency bin power of each FFT. A PN synchronization detector searches for a maximum frequency bin power among the plurality of FFT rounds and determines whether PN synchronization is present.
    Type: Grant
    Filed: April 18, 2013
    Date of Patent: March 10, 2015
    Assignee: Comtech EF Data Corp.
    Inventor: Lianfeng Peng
  • Patent number: RE45522
    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: October 10, 2013
    Date of Patent: May 19, 2015
    Assignee: EVOLVED WIRELESS LLC
    Inventors: Seung Hee Han, Min Seok Noh, Yeon Hyeon Kwon, Hyun Hwa Park, Hyun Woo Lee, Dong Cheol Kim