Correlation-type Receiver Patents (Class 375/150)
  • Patent number: 11215713
    Abstract: A tones processing system including an interference tone determination module (ITDM), an interference tone tracker module (ITTM) and an interference tone removal module (ITRM) is provided. The ITDM sequentially searches for one or more continuous wave interference (CWI) tones in N samples of intermediate frequency (IF) data within a programmable signal frequency band. The ITTM tracks the detected CWI tones. The ITRM removes the tracked CWI tones from the N samples of IF data using one or more interference tone removal units (ITRUs). Each of the ITRUs includes a second signal generator, a second mixer, a tone filter for suppressing the tracked CWI tones, and a quantizer for reducing the number of processing bits in a tone suppressed output signal. The ITRM performs frequency shift compensation and phase rotation compensation with reduced logic area and power consumption in the global navigation satellite system receiver.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: January 4, 2022
    Assignee: ACCORD IDEATION PRIVATE LIMITED
    Inventors: Gowdayyanadoddi Shivaiah Naveen, Vikram Kudligi Hiramat, Rajashekaran Chinnadurai, Manjeeth Thattam Kandiyil, Mahesh Kumar
  • Patent number: 11211971
    Abstract: A Global Navigation Satellite System (GNSS) receiver demodulates code shift keying (CSK) data utilizing a binary search. The GNSS receiver receives a signal including a pseudorandom noise (PRN) code modulated by code shift keying (CSK) to represent a symbol (i.e., CSK modulated symbol). The GNSS receiver maintains a plurality of receiver codes each representing a different shift in chips to the PRN code. The GNSS receiver performs a linear combination of portions of the receiver codes. In an embodiment, the GNSS receiver compares correlation power level value for respective portions of the receiver codes to demodulate the CSK data. In a further embodiment, the GNSS receiver compares the correlation power level values for portions of receiver codes with power detection threshold values to demodulate the CSK data. In a further embodiment, the GNSS receiver utilizes signs of the correlation power level values to demodulate the CSK data.
    Type: Grant
    Filed: April 7, 2021
    Date of Patent: December 28, 2021
    Assignee: NovAtel Inc.
    Inventors: Patrick C. Fenton, David Brown
  • Patent number: 11187775
    Abstract: There is provided a method and/or an apparatus for time of arrival, TOA, measurements. One method includes: performing, at a sample resolution, a correlation process on a received measurement signal to achieve a measurement correlation function; determining a peak sample and correlation data of at least one additional sample preceding and/or following the peak sample in the measurement correlation function; determining a TOA and/or distance on the basis of the peak sample and correction data acquired by at least the correlation data of the at least one additional sample preceding and/or following the peak sample and pre-assigned configuration data associated to the transmission channel acquired at a subsample resolution.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: November 30, 2021
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventor: Mohammad Alawieh
  • Patent number: 11177993
    Abstract: An apparatus includes a radio frequency (RF) receiver. The RF receiver includes a timing correlator and frequency offset estimator. The timing correlator and frequency offset estimator: (a) extracts timing from a set of samples derived from an RF signal, and (b) determines a frequency offset estimate from the set of samples.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: November 16, 2021
    Assignee: Silicon Laboratories Inc.
    Inventors: Hendricus de Ruijter, Wentao Li
  • Patent number: 11171734
    Abstract: Methods, systems, and devices related to applying a spreading code to reference signals are described. In one exemplary aspect, a method for wireless communication includes receiving a message indicating a set of control options available to the mobile device for data transmissions. The method includes selecting a spreading code sequence from a number of spreading code sequences, wherein the spreading code sequence corresponds to a control option in the set of control options, wherein the number of spreading code sequences is greater than a length of each of the spreading code sequence, and wherein the spreading code sequences are generated using a method when the length of each of the spreading code sequences is greater than or equal to a value. The method also includes generating a plurality of reference signal symbols using the spreading code sequence, and transmitting the plurality of reference signal symbols.
    Type: Grant
    Filed: June 22, 2020
    Date of Patent: November 9, 2021
    Assignee: ZTE Corporation
    Inventors: Wei Cao, Li Tian, Yifei Yuan, Tao Lu
  • Patent number: 11165467
    Abstract: A high data rate signal combiner (HDRSC), including: a first analog to digital converter (ADC) configured to convert a first radio frequency (RF) signal from a first antenna into a first digital signal; a second ADC configured to convert a second RF signal from a second antenna into a second digital signal; a first circular buffer configured to store the first digital signal from the first ADC; a second circular buffer configured to store the second digital signal from the second ADC; a cross-correlator configured to cross correlate the first digital signal and the second digital signal; a lag peak search circuit configured to determine the location of a peak in the output of the cross-correlator; a vector adder circuit configured to combine the first digital signal and the second digital signal with a delay on one of the first signal and the second digital signal based upon the location of the peak in the output of the cross-correlator; and a digital to analog converter (DAC) configured to convert the combin
    Type: Grant
    Filed: January 25, 2021
    Date of Patent: November 2, 2021
    Assignee: United States of America as represented by the Administrator of NASA
    Inventors: Howard Garon, David Caruth, Obadiah Kegege, Frank Stocklin, Victor Sank
  • Patent number: 11146427
    Abstract: A transition detector includes a first integrator configured to provide a first integral signal by integrating a first training pattern signal according to a first compensation clock signal, a second integrator configured to provide a second integral signal by integrating the first training pattern signal according to a second compensation clock signal, and a third integrator configured to provide a third integral signal by integrating the first training pattern signal according to a third compensation clock signal, wherein occurrence of a transition of the first training pattern signal is detected when the first integral signal and the second integral signal are larger than, and the third integral signal is smaller than, a first reference voltage.
    Type: Grant
    Filed: August 23, 2019
    Date of Patent: October 12, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventor: Jeong Keun Ahn
  • Patent number: 11108603
    Abstract: Certain aspects of the present disclosure provide methods and apparatus for generating frames with dual mode channel estimation fields (CEFs) that may accommodate devices with different processing capabilities. In some examples, a frame that is generated comprises a first portion for transmission on separate channels, and a second portion for transmission using channel bonding. The second portion has a training field including first complementary sequences, a first channel estimation field (CEF) including second complementary sequences, and a second CEF including one of the first complementary sequences of the training field and a subset of the second complementary sequences of the first CEF.
    Type: Grant
    Filed: September 24, 2017
    Date of Patent: August 31, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Amichai Sanderovich, Alecsander Petru Eitan, Assaf Yaakov Kasher
  • Patent number: 11099267
    Abstract: Embodiments are provided for a radar system including: an N number of transmit antennas; and an N number of phase shift keying (PSK) coders, each assigned a respective optimized transmitter code of a set of optimized transmitter codes, each optimized transmitter code of the set comprises a sequence of K code chips, each optimized transmitter code of the set is orthogonal to every other optimized transmitter code of the set, spectral analysis of a cross-correlation between any two optimized transmitter codes results in sidelobes no greater than a predetermined detection threshold, each PSK coder encodes K ranging waveform blocks according to the sequence of K code chips of the respective optimized transmitter code and produces a respective optimized coded sequence, and each of the N transmit antennas outputs the respective optimized coded sequence at the same time.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: August 24, 2021
    Assignee: NXP USA, INC.
    Inventors: Ryan Haoyun Wu, Chunshu Li, Arunesh Roy
  • Patent number: 11096028
    Abstract: Methods and systems for a frame structure for machine-type communications (MTC) with adjustable pulse bandwidth are described. In an embodiment, the frame structure is an uplink frame structure that illustrates a representation of a plurality of coverage levels. The coverage levels are associated with a coverage range of a base station. Each coverage level is associated with corresponding sub-frames, and each sub-frame within a coverage level has the same sub-frame length and bandwidth.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: August 17, 2021
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yu Cao, Ming Jia, Jianglei Ma
  • Patent number: 11018715
    Abstract: Techniques of transmitting wireless communications involve generating orthogonal spreading codes for any number of user devices that are linear combinations of sinusoidal harmonics that match the frequencies within the spread bandwidth. Along these lines, prior to transmitting signals, processing circuitry may generate a set of initial code vectors that form an equiangular tight frame having small cross-correlations. From each of these rows, the processing circuitry produces a new spreading code vector using a code map that is a generalization of a discrete Fourier transform. The difference between the code map and a discrete Fourier transform is that the frequencies of the sinusoidal harmonics are chosen to match the particular frequencies within the spread bandwidth and differ from a center frequency by multiples of the original unspread bandwidth. Different transmitters may then modulate respective signals generated with different spreading code vectors.
    Type: Grant
    Filed: September 21, 2020
    Date of Patent: May 25, 2021
    Assignee: Rampart Communications, Inc.
    Inventors: Matthew Brandon Robinson, Andrew Keith Palmisano, Kregg Elliott Arms, Audrey Nichole Moore
  • Patent number: 11009905
    Abstract: A semiconductor integrated circuit includes a plurality of processing circuits including a sample and hold circuit, and a timing signal generation circuit that receives a reference clock signal and generates a timing signal to control a timing to operate the sample and hold circuit based on the reference clock signal. The plurality of processing circuits serially execute processing in order from the processing circuit at a preceding stage to the processing circuit at a subsequent stage. The timing signal generation circuit is coupled to the plurality of processing circuits so as to supply the timing signal to each of the plurality of processing circuits in order from the processing circuit at the subsequent stage to the processing circuit at the preceding stage.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: May 18, 2021
    Assignee: RICOH COMPANY, LTD.
    Inventors: Isamu Miyanishi, Yuuya Miyoshi, Tohru Kanno, Shinji Sakaguchi
  • Patent number: 10945301
    Abstract: Disclosed herein are a method for transmitting and receiving a signal based on a channel aggregation transmission in a wireless local access network system and devices supporting the same. Particularly, disclosed herein are a method for transmitting and receiving a signal comprising a training field based on a channel aggregation transmission in a wireless local access network system and operation of devices supporting the same.
    Type: Grant
    Filed: October 30, 2018
    Date of Patent: March 9, 2021
    Assignee: LG ELECTRONICS INC.
    Inventors: Sunwoong Yun, Jinmin Kim, Sungjin Park, Jinsoo Choi
  • Patent number: 10942280
    Abstract: A GNSS correlator comprises a buffer and a processing unit. The buffer is configured to store input data representing sample values of a GNSS signal captured over a pre-defined time window. The processing unit is configured to receive one or more correlation parameters in a control signal, and, in a first pass, read the input data from the buffer and perform a first correlation operation on the input data, and, in a second pass, re-read the same input data from the buffer and perform a second correlation operation on the same input data, wherein the second correlation operation is different to the first correlation operation.
    Type: Grant
    Filed: November 20, 2019
    Date of Patent: March 9, 2021
    Assignee: Imagination Technologies Limited
    Inventors: Adrian John Anderson, Peter Bagnall
  • Patent number: 10931436
    Abstract: A detector circuit incudes a calculator circuit and a comparator circuit. The calculator circuit is configured to generate a plurality of first calculation values according to a plurality of first calculation symbols of a Pseudo-Noise Sequence and a plurality of second calculation symbols of a received signal, and generate a second calculation value according to the first calculation values. If a sign of a symbol of the Pseudo-Noise Sequence is the same to a sign of an adjacent symbol, the symbol is one of the first calculation symbols, and the second calculation symbols are corresponding to the first calculation symbols respectively. The comparator circuit is configured to generate a comparison result according to the second calculation value and a threshold value. The comparison result is configured for determining whether the detector circuit correctly receives the Pseudo-Noise Sequence.
    Type: Grant
    Filed: February 10, 2020
    Date of Patent: February 23, 2021
    Assignee: REALTEK SEMICONDUCTOR CORPORATION
    Inventors: Shun-Sheng Wang, Ta-Chin Tseng, Tseng-Kuei Lin, Zong-Cheng Wu
  • Patent number: 10921459
    Abstract: GNSS receiver includes first type correlators and a maximum selecting unit selecting an output from the first type correlators, and with a common control of all the correlators in code delay, carrier phase and carrier frequency; second type correlators with individual control in code delay of each correlator or each sub-group of second type correlators and with common control of all second type correlators in carrier phase and frequency; and a processor. The first type correlators can convolve one quadrature only, and demodulates CSK symbols, the second type correlators calculate discriminator values for CSK-modulated signal DLL, the demodulated data then is used by the processor to produce improved position and velocity.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: February 16, 2021
    Assignee: Topcon Positioning Systems, Inc.
    Inventors: Andrey Vladimirovich Veitsel, Leonid Victorovich Purto, Alexey Stanislavovich Lebedinsky, Dmitry Anatolievich Rubtsov
  • Patent number: 10911095
    Abstract: A correlation apparatus including a sequence generator configured to generate a non-repeating preamble sequence which changes during each of a plurality of time epochs. The correlation apparatus includes a fallthrough correlator having a tapped delay line for receiving a set of complex-valued samples of a received signal. Each of a plurality of complex multipliers of the correlator is coupled to one of the delay line taps. Each multiplier multiplies, during one of the plurality of time epochs, one of the complex-valued samples of the received signal by one of a plurality of matched filter coefficients corresponding to the preamble sequence. A summation module includes a plurality of adders where a last of the plurality of adders outputs a correlation signal. A peak value of the correlation signals exceeds a threshold value when a sufficient correlation exists between the received signal and the values of the preamble sequence.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: February 2, 2021
    Assignee: TOKAY SYSTEMS LLC
    Inventor: Alan Michaels
  • Patent number: 10911289
    Abstract: In one embodiment, an apparatus includes first and second tuners to receive and process a radio frequency (RF) signal and output a first and second plurality of frequency domain sub-carriers. The apparatus may further include a combiner circuit to combine a first plurality of demodulated frequency domain sub-carriers and a second plurality of demodulated frequency domain sub-carriers into a plurality of combined frequency domain sub-carriers, and an output circuit coupled to the combiner circuit. In a first mode, the output circuit is to embed a format indicator with each of the plurality of combined frequency domain sub-carriers to indicate a frequency domain format, and to output the plurality of combined frequency domain sub-carriers with the embedded format indicator to a downstream processing circuit for channel decoding.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: February 2, 2021
    Assignee: SILICON LABORATORIES INC.
    Inventors: Ken Strickland, Bradley Arthur Wallace, Carl Alelyunas, Vladimir Mesarovic
  • Patent number: 10856222
    Abstract: This disclosure provides systems, methods and apparatuses for indicating a data rate of a packet. The transmitting device may select the data rate of a data field of the packet to be transmitted to the receiving device, and may select a pattern to embed within a preamble of the packet based on the selected data rate. In some implementations, the transmitting device may select a first structure including a first number of instances of a sequence or its logical complement if the selected data rate is a low data rate, and may select a second structure including a second number of instances of the sequence or its logical complement if the selected data rate is a high data rate.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: December 1, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Stephen Jay Shellhammer, Bin Tian, Lochan Verma
  • Patent number: 10841027
    Abstract: A broadcast wave synchronization signal converting device that synchronizes broadcast waves with GNSS signals on a reception side and corrects the broadcast waves to global standard times by use of correction values, thereby performing periodic calibrations of frequencies. The broadcast wave synchronization signal converting device includes: a PLL circuit reproduces system clocks on the basis of time information acquired from received broadcast waves; a subtractor (C1) subtracts, from a counter value corresponding to the periodic signal intervals of GNSS signals, a counter value of the system clocks counted at the signal intervals and outputs the difference value; a control amount adjustor calculates a control amount of synchronization as a correction value on the basis of the difference value; and a subtractor (B) subtracts the correction value from the acquired time information and sets the corrected time information to a PCR counter as the internal time information thereof.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: November 17, 2020
    Assignee: HITACHI KOKUSAI ELECTRIC INC.
    Inventors: Koichi Yanagisawa, Satoru Yasui
  • Patent number: 10819387
    Abstract: Techniques of transmitting wireless communications involve generating orthogonal spreading codes for any number of user devices that are linear combinations of sinusoidal harmonics that match the frequencies within the spread bandwidth. Along these lines, prior to transmitting signals, processing circuitry may generate a set of initial code vectors that form an equiangular tight frame having small cross-correlations. From each of these rows, the processing circuitry produces a new spreading code vector using a code map that is a generalization of a discrete Fourier transform. The difference between the code map and a discrete Fourier transform is that the frequencies of the sinusoidal harmonics are chosen to match the particular frequencies within the spread bandwidth and differ from a center frequency by multiples of the original unspread bandwidth. Different transmitters may then modulate respective signals generated with different spreading code vectors.
    Type: Grant
    Filed: November 21, 2019
    Date of Patent: October 27, 2020
    Assignee: Rampart Communications, Inc.
    Inventors: Matthew Brandon Robinson, Andrew Keith Palmisano, Kregg Elliott Arms, Audrey Nichole Moore
  • Patent number: 10778279
    Abstract: A signal receiver for receiving a HOPS-based communications signal includes a seed calculator configured to produce a series of seed vectors generated from a corresponding series of sets of key values. A sequence generator provides a series of internally generated sequences using the series of seed vectors. A fallthrough correlator produces a series of correlation values by correlating samples of a received signal and samples of the internally generated sequences. The spreading sequences are used by a transmitter to generate a transmit signal subsequently received as the received signal. A peak detector is configured to generate a trigger signal upon determining that at least one of the correlation values exceeds a threshold value. At least one of a plurality of demodulator chains is selected in response to the trigger signal and used to demodulate the received signal in order to recover data values carried by the received signal.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: September 15, 2020
    Assignee: TOKAY SYSTEMS LLC
    Inventor: Alan Michaels
  • Patent number: 10768988
    Abstract: Embodiments related to processing data sets in real-time by using a distributed network to generate and process partitioned streams. Messages are assigned to partition streams. Within each stream, each of a set of processors perform a designated task. Results from the task are transmitted (directly or indirectly) to another processor in the stream. The distributed and ordered processing can allow results to be transmitted while or before the results are stored.
    Type: Grant
    Filed: January 29, 2018
    Date of Patent: September 8, 2020
    Assignee: PEARSON EDUCATION, INC.
    Inventors: Christopher Moudy, Kevin Berns
  • Patent number: 10746882
    Abstract: Systems, methods and apparatuses for generating long coherent integrations of received global navigation satellite system (GNSS) signals are described. One method includes generating coherent 1 second I/Q correlations by at least two stages of summation starting with 1 millisecond correlated I/Q signal samples. Intermediate stage coherent I/Q correlations may be modified based on, for example, lack of carrier phase lock and/or the carrier signal-to-noise density (C/N0). Such modifications include phase rotation. Energy/power amplitudes calculated from the coherent 1 second I/Q correlations may be used for improving multipath mitigation, the signal-to-noise ratio (SNR), and other GNSS receiver operations and functions.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: August 18, 2020
    Assignee: Samsung Electronics Co., Ltd
    Inventor: Gary Lennen
  • Patent number: 10750444
    Abstract: Aspects of the disclosure relate to wireless communications utilizing discontinuous reception (DRX). Disclosed methods and apparatus include providing a grant indicator in a transmission from a base station to a user equipment (UE), where indicator notifies the UE of a grant of data during a subsequent discontinuous reception (DRX) cycle in the at least one UE. Additionally, a tracking reference signal (TRS), which may be aperiodic (A-TRS), is transmitted prior to an on-duration time of the DRX cycle, where the TRS is usable by the UE for updating a tracking loop and also can be referenced by the indicator. In this manner, the combination of the grant indicator and the TRS affords a UE sufficient time for updating a UE tracking loop before the DRX cycle. Other aspects, embodiments, and features are also claimed and described.
    Type: Grant
    Filed: August 16, 2018
    Date of Patent: August 18, 2020
    Assignee: Qualcomm Incorporated
    Inventors: Heechoon Lee, Peter Pui Lok Ang, Tao Luo, Peter Gaal, Wanshi Chen, Juan Montojo, Tingfang Ji
  • Patent number: 10651889
    Abstract: A method for the detection of a pulse of a signal received by a receiver device, the received signal corresponding to data emitted with a predetermined period Tc, each piece of data being encoded by a presence or an absence of a pulse. The method includes: temporally offsetting of the received signal according to a predetermined number Ns of delays corresponding to different multiples of Tc, so as to generate Ns delayed signals; correlating, at a time that is a candidate for the detection of a pulse, the received signal with each of the delayed signals, in so as to obtain Ns correlation values associated with the candidate time; calculating a maximum correlation value among the Ns correlation values associated with the candidate time; and detecting a pulse of the received signal according to the maximum correlation value.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: May 12, 2020
    Assignee: UWINLOC
    Inventor: Jan Mennekens
  • Patent number: 10551491
    Abstract: Synthetic aperture radar (SAR) imaging systems that transmit repeated waveforms based upon pseudonoise sequences to generate SAR imaging data in accordance with various embodiments of the invention are disclosed. A synthetic aperture radar in accordance with one embodiment of the invention includes: a transmitter configured to transmit superchirps, where the superchirp is generated by convolving a kernel with a pseudonoise modulated impulse sequence having a flat power spectrum; a receiver configured to receive backscatters of transmitted superchirps and digitize the received backscatters; and signal processing circuitry configured to perform matched filtering on digitized backscatters.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: February 4, 2020
    Assignee: Planet Labs Inc.
    Inventors: Michael Rubel, Creon Levit, Matthew Ferraro
  • Patent number: 10520604
    Abstract: A module making it possible to detect a disturbance signal during initial receiving by a receiver of navigation information, the receiver including a plurality of elementary antennas able to receive, in a plurality of arrival directions, electromagnetic signals including navigation information, a forming unit able to form a resultant signal from the electromagnetic signals and a processing unit able to process the resultant signal, the detection module being integrated into the forming unit and able to receive the electromagnetic signals coming from each of the elementary antennas, analyze the signals and detect a disturbance signal when the receiver is started cold in case of detection of a favored arrival direction of some of the electromagnetic signals.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: December 31, 2019
    Assignee: THALES
    Inventors: St├ęphane Corazza, Bruno Montagne, Denis Bouvet
  • Patent number: 10516455
    Abstract: According to one embodiment of the disclosure, a non-transitory computer-readable medium comprising instructions which, when executed by one or more hardware processors, causes performance of operations. One of these operations comprises transmitting, from a first device to a second device, a first plurality of frames using a first polarization configuration for a first antenna corresponding to the first device. Based on feedback information associated with the first plurality of frames, a second polarization configuration, which is different than the first polarization configuration, is selected for transmitting a second plurality of frames. Thereafter, the second plurality of frames is transmitted from the first device to the second device using the second polarization configuration for the first antenna.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: December 24, 2019
    Assignee: Hewlett Packard Enterprise Development LP
    Inventor: Subburajan Ponnuswamy
  • Patent number: 10509118
    Abstract: This disclosure relates to systems and methods for measuring wave fields of a body of water. A system can include a radiation source and an antenna that can cooperate with the radiation source to transmit a radio frequency (RF) signal to a wave field having one or more waves. The antenna can receive backscattered signals from the wave field. The system can include a local oscillator and a processor. The local oscillator downconverts the backscattered signals into baseband signals and the processor can process the baseband signals to determine a relative velocity of each of the waves of the wave field. The processor can further be programmed to identify an observed portion of the backscattered signals as bad data and remove the bad data from further processing.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: December 17, 2019
    Assignees: Ohio State Innovation Foundation, The Regents of the University of Michigan
    Inventors: Joel Johnson, Andrew O'Brien, David Lyzenga, Graeme Smith, Shanka N. Wijesundara
  • Patent number: 10505620
    Abstract: In receiving radio waves from a transmitter by an array antenna, and estimating an arrival direction of a direct wave, delay times of the arriving waves are estimated (13) by means of a super-resolution process based on transmission channel estimation results, an arriving wave component corresponding to the delay time having been determined to be equal to or longer than a threshold value is removed (15) from the transmission channel estimation results, arriving wave components after the removal are separated from each other to extract direct wave components (17), and an arrival angle is estimated (19). The arrival direction of the direct wave can be accurately estimated in an environment where delayed waves of short delay times are present. Also, the amount of calculation is small even when the super-resolution process is performed.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: December 10, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Naosuke Ito, Daisuke Shimbo
  • Patent number: 10491262
    Abstract: Techniques of transmitting wireless communications involve generating orthogonal spreading codes for any number of user devices that are linear combinations of sinusoidal harmonics that match the frequencies within the spread bandwidth. Along these lines, prior to transmitting signals, processing circuitry may generate a set of initial code vectors that form an equiangular tight frame having small cross-correlations. From each of these rows, the processing circuitry produces a new spreading code vector using a code map that is a generalization of a discrete Fourier transform. The difference between the code map and a discrete Fourier transform is that the frequencies of the sinusoidal harmonics are chosen to match the particular frequencies within the spread bandwidth and differ from a center frequency by multiples of the original unspread bandwidth. Different transmitters may then modulate respective signals generated with different spreading code vectors.
    Type: Grant
    Filed: May 6, 2019
    Date of Patent: November 26, 2019
    Assignee: Rampart Communications, Inc.
    Inventors: Matthew Brandon Robinson, Andrew Keith Palmisano, Kregg Elliott Arms, Audrey Nichole Moore
  • Patent number: 10404271
    Abstract: A biphase mark coding transmitter is provided. In the biphase mark coding transmitter, a delay control unit performs equal-interval delay processing on data transmitted by a data coding and protocol processing unit. Then, the current-steering digital-to-analog converter is controlled to charge or discharge a resistance-capacitance circuit to obtain an accurately-controlled conversion time. Data with the controlled conversion time is driven to a CC by a unity-gain buffer to generate an output waveform. The technical solution solves the technical problem of a mutual influence between power source systems of a traditional BMC transmitter which is a digital module and a traditional BMC receiver which is an analog module, and the technical problem of a large noise of a power switch and large consumption of chip area and power which are resulted from digital buffers driven by equal-interval data or clocks in a traditional BMC transmitter.
    Type: Grant
    Filed: June 20, 2018
    Date of Patent: September 3, 2019
    Assignee: LONTIUM SEMICONDUCTOR CORPORATION
    Inventors: Cheng Tao, Xi Xu, Xiangyu Ji, Jiaxi Fu
  • Patent number: 10374902
    Abstract: A Kernel-power-density based method for wireless channel multipath components (MPCs) clustering. Signals get to the receiver from a transmitter via multipath propagation. MIMO channels can be modeled as double-directional, which contains the information of power, delay, direction of departure (DOD) and direction of arrival (DOA) of MPCs. The MPCs tend to appear in clusters. All the parameters of MPCs can be estimated by using high-resolution algorithms, such as MUSIC, CLEAN, SAGE, and RiMAX. Considering a data snapshot for a certain time with several clusters, which include a number of MPCs, where each MPC is represented by its power, delay, DOD and DOA. This invention adopts a novel clustering framework by using a density based method, which can better identify the local density variations of MPCs and requires no prior knowledge about clusters. It can work for the cluster oriented channel processing technology in future wireless communication field.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: August 6, 2019
    Assignee: Beijing Jiaotong University
    Inventors: Ruisi He, Bo Ai, Qingyong Li, Qi Wang, Li'ao Gengyang, Ruifeng Chen, Zhangdui Zhong, Jian Yu
  • Patent number: 10356699
    Abstract: There is provided mechanisms for cell search in a cluster based communications network. According to one aspect there is provided a method performed by a wireless device camping on or served by a cluster head device associated with a cluster head carrier frequency. According to one aspect there is provided a method performed by a cluster head device associated with a cluster head carrier frequency. A corresponding wireless device, a corresponding cluster head device, and corresponding computer programs and computer program products are also provided.
    Type: Grant
    Filed: September 18, 2013
    Date of Patent: July 16, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Bengt Lindoff, Johan Nilsson
  • Patent number: 10356408
    Abstract: An apparatus comprises a dividing unit which divides image data to be encoded into a plurality of tiles, a converting unit which generates a plurality of sub-bands by a frequency transform on the divided tiles, a quantizing unit which quantizes the generated sub-bands by either (1) a first method of quantizing by identical quantization parameters in relation to identical sub-bands of a plurality of tiles, or (2) a second method of quantizing by quantization parameters set individually for each tile in relation to identical sub-bands of a plurality of tiles, an encoding unit which encodes data obtained by the quantizing, and a control unit which switches, in accordance with a target data amount of the image data to be encoded, whether to quantize by the first method or to quantize by the second method.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: July 16, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryota Suzuki, Koji Togita
  • Patent number: 10298345
    Abstract: Aspects of the present disclosure includes a method and program product for clock synchronization of a networked computer system. The method records a time (t1) when a first codeword marker in a datastream is sent from a master computer to a slave computer and records a second time (t2) when the slave computer receives the first codeword marker. The method includes recording a third time (t3) when a third codeword marker in a datastream is sent from the slave computer to the master computer. The method includes recording a fourth time t4 when the master receives the third codeword marker from the slave. The method calculates a time offset ?, according to; ? = ( t ? ? 2 - t ? ? 1 ) + ( t ? ? 4 - t ? ? 3 ) 2 , and a roundtrip delay ?, according to ?=(t4?t1)?(t3?t2). The clock in the slave computer is synchronized with a clock in the master computer using ? and ?.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: May 21, 2019
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Kai Yang, Bin Sun, Yuan Yao, Zhen Han
  • Patent number: 10277390
    Abstract: A method, apparatus and computer program product for performing decimated correlation in a wireless communications network is disclosed. An input signal composed of a plurality of streaming samples of the input signal is received and applied to a plurality of shift registers coupled to computation logic. The computation logic receives an input of correlation options and a correlation pattern. Based upon a comparison to a correlation threshold, the correlator selectively holds the correlation options constant to inhibit a new correlation, and/or selectively freezes streaming samples input to the computation logic via a plurality of corresponding shadow registers to save power.
    Type: Grant
    Filed: January 22, 2018
    Date of Patent: April 30, 2019
    Assignee: Arm Limited
    Inventors: Paul Edward Gorday, Ricardo Franco
  • Patent number: 10256933
    Abstract: A method and device for transmitting a preamble sequence is disclosed. A transmitter according to an embodiment may extract a first sequence for a non-coherent receiver and a second sequence for a coherent receiver, from ternary preamble sequences including elements ?1, 0 and 1, and map the first sequence and the second sequence to a preamble including a plurality of bits to generate a third sequence that the non-coherent receiver and coherent receiver support.
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: April 9, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chang Soon Park, Young Jun Hong, Jinesh P Nair, Joon Seong Kang, Young Soo Kim, Sujit Jos, Manoj Choudhary
  • Patent number: 10250427
    Abstract: The present technology relates to a receiver, a frame synchronization method, a transmitter, a transmission method, and a program that allows for enhancing frame synchronization performance without reducing throughput. A receiver of an aspect of the present technology receives signals of a frame having a preamble including a frame detection signal sequence formed by a repetition of a known signal sequence, followed by a frame synchronization signal sequence formed by the known signal sequence or an inverse sequence thereof, performs convolution arithmetic operation of a known correlation sequence and cross-correlation between a received signal sequence and the frame synchronization signal sequence, and ensures synchronization of the frame while regarding predetermined time when a value more than or equal to a threshold value or a maximum value is obtained. The present technology can be applied to a device that transmits and receives data.
    Type: Grant
    Filed: August 11, 2015
    Date of Patent: April 2, 2019
    Assignee: Sony Semiconductor Solutions Corporation
    Inventors: Masashi Shinagawa, Makoto Noda
  • Patent number: 10230409
    Abstract: Signals are received that include a channel band and an adjacent band. The channel band is demodulated to obtain recovered symbols. Cross-correlation between the recovered symbols and the adjacent band is estimated. Adjacent channel interference is estimated, using the estimated cross-correlation of the recovered symbols and the adjacent band. Upon the estimated adjacent channel interference meeting a condition, a back-off command is sent to a transmitter power amplifier.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: March 12, 2019
    Assignee: Hughes Network Systems, LLC
    Inventor: Neal D. Becker
  • Patent number: 10218419
    Abstract: A block coding method and system for improving the reliability of Channel Quality Indicators (CQI) and antenna weight indicators (AWI) reporting. A user terminal first generates 8-bit CQI and 2-bit AWI. A codeword generator produces a codeword responsive to these 10 CQI/AWI bits using a codebook or a generator matrix of a (20,10,6) code. The (20,10,6) code has a minimum Hamming distance of 6 The encoded codeword is transmitted to a receiver for decoding utilizing an identical (20,10,6) codebook.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: February 26, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Jung-Fu Cheng, Yi-Pin Eric Wang, Stephen Grant
  • Patent number: 10187231
    Abstract: One aspect of the present invention includes a bi-phase communication receiver system. The system includes an analog-to-digital converter (ADC) configured to sample a bi-phase modulation signal to generate digital samples of the bi-phase modulation signal. The system also includes a bi-phase signal decoder configured to decode the bi-phase modulation signal based on the digital samples. The system further includes a preamble detector comprising a digital filter configured to evaluate the digital samples to generate an output and to detect a preamble of the bi-phase modulation signal for decoding the bi-phase modulation signal based on the output.
    Type: Grant
    Filed: March 23, 2015
    Date of Patent: January 22, 2019
    Assignee: Texas Instruments Incorporated
    Inventor: Eric Gregory Oettinger
  • Patent number: 10158464
    Abstract: A mobile terminal device may include a receiver circuit and a processing circuit. The receiver circuit may be configured to receive a composite signal comprising a plurality of reference signal patterns associated with a plurality of transmit locations. The processing circuit may be configured to identify a first reference signal pattern and a second reference signal pattern from the plurality of reference signal patterns; generate a first offset estimate and a second offset estimate based on the first reference signal pattern and the second reference signal pattern; determine a refined offset estimate based on the first offset estimate and the second offset estimate, wherein first offset estimate has a greater offset estimation range than the second offset estimate.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: December 18, 2018
    Assignee: Intel IP Corporation
    Inventors: Dae Jung Yoon, Bertram Gunzelmann, Ansgar Scherb
  • Patent number: 10153804
    Abstract: Circuits and methods concerning signal detection are disclosed. In some example embodiments, an apparatus is configured to detect presence of a spreading sequence in a sample data sequence. Phase differences between samples in a sample sequence are determined. Presence of a spreading sequence in the sample sequence is detected by evaluating correlation of reference sub-sequences, of a reference spreading sequence, to the phase differences between samples in a sample sequence. Each of the reference sub-sequences includes fewer chips than the spreading sequence to be detected.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: December 11, 2018
    Assignee: NXP USA, Inc.
    Inventors: Khurram Waheed, Kevin Traylor, Mihai-Ionut Stanciu
  • Patent number: 10135655
    Abstract: The present disclosure discloses an indication information transmission method and apparatus. The method includes: determining a first signature sequence and a first modulation constellation that are used to transmit an uplink data stream by a terminal device; determining indication information that is used to indicate the first signature sequence and the first modulation constellation; and transmitting the indication information to the terminal device. In this way, a system network capacity can be effectively increased.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: November 20, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Xiuqiang Xu, Lei Wang, Yan Chen
  • Patent number: 10122396
    Abstract: Mechanisms for interferer detection can detect interferers by detecting elevated signal amplitudes in one or more of a plurality of bins (or bands) in a frequency range between a maximum frequency (fMAX) and a minimum frequency (fMIN). To perform rapid interferer detection, the mechanisms downconvert an input signal x(t) with a local oscillator (LO) to a complex baseband signal xI(t)+jxQ(t). xI(t) and xQ(t) are then multiplied by m unique pseudorandom noise (PN) sequences (e.g., Gold sequences) gm(t) to produce m branch signals for I and m branch signals for Q. The branch signals are then low pass filtered, converted from analog to digital form, and pairwise combined by a pairwise complex combiner. Finally, a support recovery function is used to identify interferers.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: November 6, 2018
    Assignee: The Trustees of Columbia University in the City of New York
    Inventors: Peter R. Kinget, John Wright, Rabia Tugce Yazicigil
  • Patent number: 10063330
    Abstract: A wireless network transmission system is provided. The wireless network transmission system comprises a first transmission device and at least a second transmission device. The first transmission device includes a control circuit and a plurality of first antennas. The control circuit is electrically connected to the first antennas. The second transmission device is configured to be communicated with the first transmission device. The first antennas receive wireless signals from the second transmission device. The control circuit is configured to compare signal strength of the wireless signal received by each of the first antennas to generate a comparison result select at least one of the first antennas to transmit or receive the wireless signals according to the comparison result. A wireless network transmission method and a transmission device are also provided.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: August 28, 2018
    Assignee: ASUSTeK COMPUTER INC.
    Inventors: Yen-Ching Kuo, Jung-Huang Chiang, Ten-Long Deng, Hsiao-Ming Tsai
  • Patent number: 10051437
    Abstract: A receiver including a plurality of correlators to receive a satellite signal having a line of sight (LOS) component and a multipath (MP) component and generate correlator results corresponding to the received satellite signal. The receiver includes a peak search module to identify frequency peaks in the received satellite signal based on the correlator results, a peak selection module to identify the LOS component of the received satellite signal based on the identified frequency peaks and at least one of a code phase error module to generate a code phase error corresponding to the identified LOS component and a carrier frequency error module to generate a carrier frequency error corresponding to the identified LOS component. The plurality of correlators are further to generate the correlator results based on at least one of the code phase error and the carrier frequency error.
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: August 14, 2018
    Assignee: Marvell International Ltd.
    Inventors: Jiangping Deng, Zhike Jia, Jian Cheng, Feng Xu, Yongsong Wang
  • Patent number: 10038455
    Abstract: A signal modulation device comprising: an input for receiving a complex input signal (106) comprising an in-phase component signal and a quadrature-phase component signal, a sigma-delta modulator (110) for modulating the complex input signal at an oversampling clock rate (F1) into an intermediary signal (112), a numerical oscillator (60) for generating a phase signal (61) oscillating at a selected carrier frequency (FC), wherein the phase signal takes a finite number of quantized states, and a symbol mapping table (114) comprising a predefined quantized symbol for each quantized complex state of the intermediary signal and each quantized state of the phase signal, and operates at each oversampling clock period (F1) to select a quantized symbol (116) as a function of a current quantized complex state of the intermediary signal (112) and a current quantized state of the phase signal (61).
    Type: Grant
    Filed: May 5, 2014
    Date of Patent: July 31, 2018
    Assignee: Alcatel Lucent
    Inventor: Luc Dartois