Having Specific Code Synchronization Patents (Class 375/149)
  • Patent number: 11477742
    Abstract: A cell search and synchronization method in a wireless communication system providing at least one cell having a frequency span in the frequency domain, the method includes: defining, for a said cell, a plurality of resources within the frequency span and within a defined time frame for transmitting a synchronization signal wherein a resource is characterised by a location in the frequency domain and a location in the time domain; and transmitting the synchronization signal in more than one of the plurality of resources.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: October 18, 2022
    Assignee: FUJITSU LIMITED
    Inventors: Xusheng Wei, Timothy Moulsley
  • Patent number: 11463289
    Abstract: A method for receiving a plurality of separate signals transmitted respectively by a plurality of transmit antennas, includes the steps of: receiving a plurality of respective signals on a plurality of receive antennas, applying energy detection to each of the received signals, jointly demodulating the received signals by way of a machine-learning algorithm trained beforehand so as to learn to demodulate each modulated symbol of the transmitted signal based on the respective contributions of this modulated symbol that are received on the plurality of receive antennas.
    Type: Grant
    Filed: May 26, 2021
    Date of Patent: October 4, 2022
    Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
    Inventors: Simon Bicais, Alexis Falempin, Jean-Baptiste Dore
  • Patent number: 11310753
    Abstract: A method is performed by a wireless node in a wireless communication network for receiving a reference signal. The method includes collecting a first set of samples of the received signal in time domain, transforming the first set of samples into frequency domain, forming a plurality of hypotheses including a set of hypotheses for time offset of the received signal and/or a set of hypotheses for frequency offset of the received signal, correlating the frequency domain samples of the received signal with at least a subset of the plurality of hypotheses, and selecting a hypothesis based on the correlation, wherein the selected hypothesis corresponds to a synchronisation of the received signal such that the synchronisation is achieved. A wireless communication device, a network node, and computer programs for implementing the method are also described.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: April 19, 2022
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Andres Reial, Stephen Grant, Claes Tidestav
  • Patent number: 11296869
    Abstract: An encryption specification named “MetaEncrypt” implemented as a method and associated apparatus is disclosed for unbreakable encryption of data, code, applications, and other information that uses a symmetric key for encryption/decryption and to configure the underlying encryption algorithms being utilized to increase the difficulty of mathematically modeling the algorithms without possession of the key. Data from the key is utilized to select several encryption algorithms utilized by MetaEncrypt and configure the algorithms during the encryption process in which block sizes are varied and the encryption technique that is applied is varied for each block. Rather than utilizing a fixed key of predetermined length, the key in MetaEncrypt can be any length so both the key length and key content are unknown.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: April 5, 2022
    Inventor: Daniel Eugene Hale
  • Patent number: 11121738
    Abstract: A radio receiver includes a downconverter for downconverting dual sideband signals such as Binary Offset Carrier (BOC) signals from multiple sources to produce an upper and a lower sideband signal, and chip-matched filters for filtering each of the sideband signals. The output of each filter is provided to a series of separate channels, one for each source, where there are at least Early, Prompt and Late gates. Each gate has a nearest-neighbour sampler and a multiplier for multiplying with an appropriate part of a spreading code, a mixer for removing Doppler or other frequency offsets and an integrator. The invention provides a means for demodulating signals such as BOC modulated satellite navigation signals in an efficient manner by using a single downconverter for the received signals of interest from the multiple sources.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: September 14, 2021
    Assignee: QINETIQ LIMITED
    Inventor: Malcolm David Macleod
  • Patent number: 11067663
    Abstract: Methods and devices for distance measuring/ranging, as well as location measurements both in 2D and 3D are presented. More specifically, the methods and devices are for determining the time of arrival of a radio frequency signal. A method of determining a time of arrival of a radio frequency signal in a receiving device as received from a transmitting device includes receiving a radio frequency signal, determining a first phase. The first phase is defined as a phase of the received radio frequency signal. The method also includes obtaining a second phase. The second phase is defined as a phase of a reference radio frequency signal. The method also includes determining the time of arrival of the radio frequency signal based on comparing the first and second phases.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: July 20, 2021
    Assignee: Dialog Semiconductor B.V.
    Inventor: Wessel Lubberhuizen
  • Patent number: 11012150
    Abstract: An autonomous failure recovery method and a system for a fiber-optic communication system. The method comprises acquiring a real-time operation timing sequence of a digital high-speed serial transceiver of a fiber-optic communication system, and comparing the operation timing sequence against a pre-stored reference timing sequence of normal operation of the serial transceiver; when the operation timing sequence is inconsistent with the reference timing sequence, determining that failure of an optical path of the fiber-optic communication system has occurred; sending a pre-determined autonomous recovery timing sequence to the serial transceiver when the optical path is in a failure state, and performing an autonomous failure recovery operation of the fiber-optic communication system in response to the autonomous recovery timing sequence.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: May 18, 2021
    Assignee: COMBA TELECOM SYSTEMS (CHINA) LIMITED
    Inventors: Wen Zhang, Hui Lv
  • Patent number: 10886978
    Abstract: Provided is a method and apparatus for multi-antenna transmission to minimize a charging time of users in a wireless powered communication network. A power transmission apparatus may be configured to generate a covariance matrix to minimize a charging time of the power reception apparatus based on an amount of energy required by at least one power reception apparatus; to derive a beamforming vector using the covariance matrix; and to transmit a wireless power to the power reception apparatus based on the beamforming vector.
    Type: Grant
    Filed: December 2, 2019
    Date of Patent: January 5, 2021
    Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Wan Choi, Jinho Kang
  • Patent number: 10868628
    Abstract: The disclosed systems, structures, and methods are directed to a spectrally-efficient orthogonal code generation architecture. The configurations presented herein employ a full-set code generation module configured to generate a candidate code group, wherein the candidate code group contains 2L different codes for a given code length L, a frequency response calculation module configured to calculate frequency response of the codes within the candidate code group and a frequency code searching module configured to search the orthogonal codes within each frequency code group. In addition, the grouping of codes is done on the basis of number of frequency locations and positions, one or more code sets are formed within each frequency code group, codes within code sets are orthogonal in nature and orthogonal codes along with their identifier information are stored in a database forming an orthogonal code list.
    Type: Grant
    Filed: April 2, 2019
    Date of Patent: December 15, 2020
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Lan Hu, Sai Mohan Kilambi, David Neal Wessel, Wen Tong
  • Patent number: 10791513
    Abstract: A DRX control method and system includes receiving, from a source base station for transferring the UE from the source base station to a target base station, a plurality of configurations including: a first configuration of a first Discontinuous Reception (DRX) cycle, a second configuration of a second DRX cycle, and a first timer counting a period in the first DRX cycle to shift from the first DRX cycle to the second DRX cycle; performing, in a state of RRC Radio Resource Control (RRC) connected with the target base station, DRX operation with the first DRX cycle; and performing, in a state of RRC connected with the target base station, the DRX operation with the second DRX cycle when the UE does not receive data from the target base station until the first timer expires in the first DRX cycle.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: September 29, 2020
    Assignee: NEC CORPORATION
    Inventors: Hisashi Futaki, Jinsock Lee
  • Patent number: 10779330
    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 sequence with zero correlation zone.
    Type: Grant
    Filed: May 29, 2018
    Date of Patent: September 15, 2020
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Branislav Popovic, Oskar Mauritz
  • Patent number: 10660091
    Abstract: A method and apparatus are disclosed from the perspective of a network node. In one embodiment, the method includes the network node transmitting a first slot format information (SFI) to a User Equipment (UE), wherein the first SFI indicates transmitted direction of symbols of a first set of slots. The method also includes the network node transmitting a second SFI carried by a group common physical downlink control channel (PDCCH) to the UE, wherein the second SFI indicates transmitted direction of symbols of a second set of slots, and wherein if the first set of slots and the second set of slots are partially overlapped in time domain and the second SFI is transmitted after the first SFI, transmitted direction of overlapped symbols indicated by the second SFI is aligned with transmitted direction of the overlapped symbols indicated by the first SFI.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: May 19, 2020
    Assignee: ASUSTek Computer Inc.
    Inventors: Chun-Wei Huang, Ko-Chiang Lin, Yu-Hsuan Guo
  • Patent number: 10629011
    Abstract: A method is provided for detecting an attack on a keyless entry system for a vehicle. The method includes receiving a wireless transmission by the keyless entry system. The wireless transmission is filtered in a first filter to produce a filtered wireless transmission. The wireless transmission is filtered in a second filter to produce a reference filtered wireless transmission. A frequency band of the filtered wireless transmission is compared to a frequency band of the reference filtered wireless transmission. Based on the comparison, it is determined if the wireless transmission is from a key fob that complies with the specification of the wireless transmission. In another embodiment, a wireless receiver is provided for performing the method.
    Type: Grant
    Filed: August 1, 2018
    Date of Patent: April 21, 2020
    Assignee: NXP B.V.
    Inventor: Jan-Peter Schat
  • Patent number: 10624041
    Abstract: A packet error rate estimator is configured to estimate packet error rate (PER). In an example, power or energy is calculated in one or more streams of I/Q samples over a period of time. The power or energy may be calculated for periods of time, e.g., bit-length periods of time, and a maximum value of bit-length power or energy may be selected over a packet-length period of time. The maximum power or energy associated with each stream of I/Q samples over the period of time may be compared to at least two threshold values. Each threshold value may be associated with an expected PER. Based at least in part on the comparing, and which of a plurality of threshold vales were (or were not) exceeded, a PER may be estimated for each stream of I/Q samples. The PER may be used to select a channel plan with less radio frequency noise.
    Type: Grant
    Filed: April 29, 2019
    Date of Patent: April 14, 2020
    Assignee: Itron, Inc.
    Inventor: Danny Ray Seely
  • 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: 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: 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: 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, François-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