Patents Examined by James M Perez
  • Patent number: 11368196
    Abstract: Communication systems and methods in accordance with various embodiments of the invention utilize modulation on zeros. Carrier frequency offsets (CFO) can result in an unknown rotation of all zeros of a received signal's z-transform. Therefore, a binary MOCZ scheme (BMOCZ) can be utilized in which the modulated binary data is encoded using a cycling register code (e.g. CPC or ACPC), enabling receivers to determine cyclic shifts in the BMOCZ symbol resulting from a CFO. Receivers in accordance with several embodiments of the invention include decoders capable of decoding information bits from received discrete-time baseband signals by: estimating a timing offset for the received signal; determining a plurality of zeros of a z-transform of the received symbol; identifying zeros from the plurality of zeros that encode received bits by correcting fractional rotations resulting from the CFO; and decoding information bits based upon the received bits using a cycling register code.
    Type: Grant
    Filed: March 17, 2021
    Date of Patent: June 21, 2022
    Assignees: California Institute of Technology, The Regents of the University of California, Technische Universität Berlin
    Inventors: Philipp Walk, Babak Hassibi, Peter Jung, Hamid Jafarkhani
  • Patent number: 11368348
    Abstract: A signal transmission method and apparatus are provided, to resolve a problem that because a PAPR of a signal is comparatively high, a waveform distortion of the signal is comparatively serious after power amplification is performed on the signal by using a PA. The method includes: separately performing phase rotation on M pieces of modulated data to obtain M pieces of phase-rotated data, where a phase factor for performing phase rotation on the M pieces of modulated data is determined based on M. The method further includes: determining time domain data based on the M pieces of phase-rotated data, and sending the time domain data to a receive end.
    Type: Grant
    Filed: May 19, 2021
    Date of Patent: June 21, 2022
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yuanzhou Hu, Fan Wang
  • Patent number: 11362709
    Abstract: A signal generation method is used in a transmission device that transmits a plurality of transmission signals from a plurality of antennas at the same frequency and at the same time, in the case where larger power change is performed on a first transmission signal than on a second transmission signal during generation process of the first transmission signal and the second transmission signal, the first transmission signal and the second transmission signal are mapped before the power change such that a minimum Euclidian distance between possible signal points for the first signal is longer than a minimum Euclidian distance between possible signal points for the second signal.
    Type: Grant
    Filed: June 14, 2021
    Date of Patent: June 14, 2022
    Inventors: Yutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi
  • Patent number: 11362874
    Abstract: Systems and methods for transmitting data using various Modulation on Zeros schemes are described. In many embodiments, a communication system is utilized that includes a transmitter having a modulator that modulates a plurality of information bits to encode the bits in the zeros of the z-transform of a discrete-time baseband signal. In addition, the communication system includes a receiver having a decoder configured to decode a plurality of bits of information from the samples of a received signal by: determining a plurality of zeros of a z-transform of a received discrete-time baseband signal based upon samples from a received continuous-time signal, identifying zeros that encode the plurality of information bits, and outputting a plurality of decoded information bits based upon the identified zeros.
    Type: Grant
    Filed: March 15, 2021
    Date of Patent: June 14, 2022
    Assignee: California Institute of Technology
    Inventors: Philipp Walk, Babak Hassibi, Peter Jung
  • Patent number: 11356198
    Abstract: The present disclosure relates to a demodulation method, apparatus, and device. Some embodiments of the present disclosure are beneficial to improving demodulation performance.
    Type: Grant
    Filed: July 23, 2021
    Date of Patent: June 7, 2022
    Inventor: Chenglin Li
  • Patent number: 11356136
    Abstract: A receiver circuit includes a mixer receiving an RF signal encoding an information signal. The mixer receives a number of multiphase oscillator signals and generates multiphase baseband signals. The receiver circuit also includes a variable gain circuit receives the multiphase baseband signals, generates a first output signal having a first distortion, and a second output signal having a second distortion. The variable gain circuit is configured to generate a reduced distortion output signal based on the first and second output signals.
    Type: Grant
    Filed: September 8, 2020
    Date of Patent: June 7, 2022
    Assignee: Shenzhen Goodix Technology Co., Ltd.
    Inventors: Ahmed Emira, Faisal Hussien, Mostafa Elmala, Mohamed Aboudina
  • Patent number: 11356312
    Abstract: A method and device to modulate an FBMC/OQAM signal, the device comprising at least one QAM mapper mapping a binary stream into complex symbols, a first and a second transmission chain. Each chain comprises: a precoder transposing respective sets of symbols into frequency domain real/imaginary samples, a phase rotator applying a phase quadrature keying to said samples, an FBMC modulator to modulate the output of the phase rotator into an FBMC symbol. The device further comprises an adder of the output of the first transmission chain with a delayed output of the second transmission chain, and is configured to insert guard interval sequences into the binary stream or into the symbols processed by the precoders. A corresponding radio communication equipment, computer program and readable medium is provided.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: June 7, 2022
    Inventors: Jérémy Nadal, Charbel Abdel Nour, Amer Baghdadi
  • Patent number: 11342973
    Abstract: The system and method for maintaining communications in a cellular network provides for automatically generating a bundle of partially overlapping beams when the primary link between a base station (BS) and a mobile station (MS) degrades so that the signal-to-noise ratio (SNR) of a received transmission falls below a defined threshold. The overlapping beams are generated by a beamformer having a circular array of antennas, the array being divided into groups radiating the signal in adjacent but partially overlapping sectors at an amplitude determined by extended Hamming codes having zero cross correlation. The bundle is radiated over a 360° pattern so that it overlaps the blocked signal. The MS demodulates and retrieves received signals having the highest correlation. The recovery time is quicker than conventional systems and methods, e.g., 200 microseconds when the MS uses a narrow pencil beam (5° beamwidth).
    Type: Grant
    Filed: October 19, 2021
    Date of Patent: May 24, 2022
    Inventors: Adel Aldalbahi, Mohammad A. Jasim
  • Patent number: 11336329
    Abstract: A terminal apparatus includes a receiver and a transmitter. The receiver is configured to receive a radio resource control (RRC) parameter and a physical downlink control channel (PDCCH) including a downlink control information (DCI) format and scheduling a physical uplink shared channel (PUSCH). The transmitter is configured to transmit the PUSCH with frequency hopping within one slot. The RRC parameter indicates one or a plurality of frequency offset values. The PUSCH includes a first frequency hop and a second frequency hop within the one slot. In a case that a cyclic redundancy check (CRC) scrambled with or other than a temporary cell-radio network temporary identifier (TC-RNTI) is added to the DCI format, a frequency offset between the first frequency hop and the second frequency hop is based on a size of an initial uplink (UL) bandwidth part (BWP) or the RRC parameter, respectively.
    Type: Grant
    Filed: September 17, 2019
    Date of Patent: May 17, 2022
    Assignees: SHARP KABUSHIKI KAISHA, FG Innovation Company Limited
    Inventors: Liqing Liu, Shohei Yamada, Hiroki Takahashi, Masayuki Hoshino, Hidekazu Tsuboi
  • Patent number: 11329693
    Abstract: An electronic communication device comprises a first transceiver capable of a bi-directional communication session on a first communication medium; a second transceiver capable of a bi-directional communication session on a second communication medium; and a control logic coupled to the first transceiver and the second transceiver and capable of implementing a convergence layer, wherein the control logic is configured to receive, from the first transceiver, a first signal; and cause, in response to the first signal, data received and transmitted by the first transceiver on the first communication medium as part of a communication session to be received and transmitted instead by the second transceiver on the second communication medium.
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: May 10, 2022
    Inventors: Yanjun Sun, Gang Xu, Soon-Hyeok Choi, Bhadra Sandeep, Xiaolin Lu, Ariton E. Xhafa, Minghua Fu, Robert W. Liang, Susan Yim
  • Patent number: 11316596
    Abstract: Disclosed is a method for detecting at least one compromised computer device in an information system, the method including: performing a frequency scan involving dividing the electromagnetic spectrum into frequency sub-bands; performing, in each frequency sub-band, a time envelope demodulation in order to recover signals transmitted by at least one computer device of the information system; converting each demodulated signal in the frequency domain; constructing a frequency spectrum on the basis of the demodulated signals in all the frequency sub-bands; finding, in each frequency sub-band of the frequency spectrum, at least one amplitude line having energy that is greater than a first predefined energy threshold; and, if at least one line having energy that is greater than the first predefined energy threshold is found, indicating the presence of at least one compromised computer device transmitting compromising spurious signals.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: April 26, 2022
    Inventors: Sébastien Mallier, Erwan Nogues, Thierry Dandois, Daniel Bigot
  • Patent number: 11316716
    Abstract: A Radio Frequency Impairments (RFI) compensator and a process to remove RFI is disclosed. The RFI compensator including: a conjugator to conjugate a signal {tilde over (x)}[n] to provide a signal {tilde over (x)}*[n]; and a filter to apply coefficients that equalize a linear distortion of the signal {tilde over (x)}[n] and reject an interfering image of the signal {tilde over (x)}*[n]. The signal {tilde over (x)}[n] maybe a single wideband carrier or may include multiple carriers at different carrier frequencies.
    Type: Grant
    Filed: October 15, 2020
    Date of Patent: April 26, 2022
    Assignee: Hughes Network Systems, LLC
    Inventor: Bassel F. Beidas
  • Patent number: 11316656
    Abstract: A time transfer modem includes a radio frequency integrated circuit (RFIC), a radio frequency (RF) front end, and processing circuitry. The RF front end is configured to receive and up-convert an input for time transfer with a remote station to generate an up-converted timing signal centered at a select frequency that is outside of a frequency range of interest but within an operational frequency range of the RFIC. The RF front end may also be configured to attenuate, via a pre-selection filter, up-converted adjacent signals to generate a filtered timing signal at the select frequency. The RFIC may be configured to down-convert and digitize the filtered timing signal to generate a digitized timing signal for signal processing by the processing circuitry to determine a clock difference between a local clock signal and the digitized timing signal that originated from the remote station.
    Type: Grant
    Filed: May 6, 2021
    Date of Patent: April 26, 2022
    Assignee: The Johns Hopkins University
    Inventors: Norman H. Adams, Jeffrey A. Boye, Adam V. Crifasi, Blair C. Fonville, Ian M. Hughes, Amit Shah, Gregory L. Weaver, John F. Youssef, Darrell A. Zinn
  • Patent number: 11316655
    Abstract: A device with wireless communication includes: an input receiver configured to receive an input signal having a carrier frequency; a delay circuit configured to generate a delayed signal by delaying the input signal; and a clock generator configured to generate a clock signal having a clock frequency based on the delayed signal and the input signal.
    Type: Grant
    Filed: April 16, 2020
    Date of Patent: April 26, 2022
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seong Joong Kim, Joonseong Kang
  • Patent number: 11290309
    Abstract: The present invention discloses a Trellis-Coded-Modulation (TCM) decoder applied in a receiver, wherein the TCM decoder includes a branch metric unit, a path metric unit, a trace-back length selection circuit and a survival path management circuit. In operations of the TCM decoder, the branch metric unit is configured to receive multiple input codes to generate multiple sets of branch information. The path metric unit is configured to calculate multiple survival paths according to the multiple sets of branch information. The trace-back length selection circuit is configured to select a trace-back length, wherein the trace-back length is determined according to a signal quality of the receiver. The survival path management circuit is configured to return the multiple survival paths for the trace-back length in order to generate an output code.
    Type: Grant
    Filed: December 21, 2020
    Date of Patent: March 29, 2022
    Assignee: Faraday Technology Corp.
    Inventor: Shih-Yi Shih
  • Patent number: 11290148
    Abstract: An operation method is implemented by a receiver device. The operation method includes following steps: detecting a signal on a transmission line; performing a channel estimation to acquire a length of the transmission line; comparing the length with at least one length threshold value to generate a comparison result; and adjusting a depth of a FIFO process according to the comparison result.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: March 29, 2022
    Inventors: Chi-Sheng Hsu, Sung-Yen Mao
  • Patent number: 11290291
    Abstract: In a Power over Data Lines (PoDL) system that conducts differential data and DC power over the same wire pair, various DC coupling techniques are described that improve DC voltage coupling while attenuating AC common mode noise and avoiding mode conversion. A first CMC and AC coupling capacitors are connected in series between a PHY and a twisted wire pair. A DC power supply is DC coupled to the wires via a series connection of a DMC and either matched inductors or a second CMC. Coupled between the DMC and the inductors/CMC is an RC termination circuit comprising a first capacitor coupled to one leg and a matched second capacitor coupled to the other leg. The two capacitors are connected to the same resistor coupled to ground.
    Type: Grant
    Filed: May 8, 2019
    Date of Patent: March 29, 2022
    Assignee: Analog Devices International Unlimited Company
    Inventors: Andrew Gardner, Gitesh Bhagwat
  • Patent number: 11277238
    Abstract: Provided are phase tracking reference signal (PTRS) configuration, determination and information feedback methods and devices. The PTRS configuration method includes: transmitting, by a first node, the control information to a second node, where the control information is used for indicating a configuration parameter of the PTRS to the second node and the PTRS is transmitted by the first node or the second node. The second node determines the configuration parameter of the PTRS through the control information transmitted by the first node and/or an agreed implicit rule. A third node transmits control information to a fourth node, where the control information is used for feeding received power or quality information of the PTRS back to the fourth node.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: March 15, 2022
    Inventors: Yijian Chen, Zhaohua Lu, Hao Wu, Bo Gao, Nan Zhang
  • Patent number: 11271711
    Abstract: A communication control device that includes a synchronization detection unit that detects a synchronization timing from a synchronization signal and a transmission control unit that causes a communication unit to transmit a control signal., for changing a communication route of data to which a flag specified on the basis of the synchronization signal, to a network switch that performs relay between a reception device and a plurality of transmission devices that transmits the data to which the flag is added while changing the flag at the synchronization timing.
    Type: Grant
    Filed: October 25, 2019
    Date of Patent: March 8, 2022
    Inventor: Yasuto Masuda
  • Patent number: 11265820
    Abstract: A method for controlling a transmit power of a terminal, and a terminal, where the method and the terminal include, working states of a first antenna and a second antenna may be monitored, and then a transmit power of the first antenna or that of the second antenna may be controlled according to a preset correspondence. Therefore, according to the method and the terminal, a transmit power of an antenna in a working state in the first antenna and the second antenna may be accurately controlled. If the transmit power is less than a standard transmit power, a Specific Absorption Rate (SAR) can be reduced.
    Type: Grant
    Filed: February 4, 2020
    Date of Patent: March 1, 2022
    Assignee: HONOR DEVICE CO., LTD.
    Inventors: Jian Luo, Hui Jin, Songping Yao, Hongyu Li, Yingwei Li, Hongming Zhang, Xuyang Du