Patents Examined by Phuong Phu
  • Patent number: 10693505
    Abstract: A sending unit includes a send data storing unit, a sending-side signal processing unit, and a first DA converter and a second DA converter. A receiving unit includes a first AD converter and a second AD converter, a receiving-side signal processing unit, and a receive data storing unit. The sending-side signal processing unit calculates output signals using a matrix formed of eigenvectors corresponding to transmission eigenmodes in which the signals propagate through a transmission path. The receiving-side signal processing unit calculates data signals of a plurality of sequences by the inverse of the matrix used by the sending-side signal processing unit.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: June 23, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Takashi Kuwahara, Yoshihiro Akeboshi
  • Patent number: 10693512
    Abstract: The present disclosure provides for distortion cancelled by receiving a collided signal comprising first and second signals carrying respective first and second packets; digitizing the collided signal into a first digital signal and decoding the first packet therefrom; calculating a digital linear interference component of the first packet on the second from an estimated signal re-encoding the decoded first packet; synthesizing an analog linear interference component from the digital linear interference component; determining a digital nonlinear interference component of the first packet on the second from the first digital signal; amplifying the collided signal to produce a second amplified signal; removing the analog linear interference component from the second amplified signal to produce a partially de-interfered signal; removing the digital nonlinear interference component from the partially de-interfered signal to produce a de-interfered signal; and decoding the second packet from the de-interfered sign
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: June 23, 2020
    Assignee: Cisco Technology, Inc.
    Inventors: Khashayar Mirfakhraei, Ardalan Alizadeh, Xu Zhang, Gautam D. Bhanage, Daniel J. Lyons, Brian D. Hart
  • Patent number: 10680666
    Abstract: A timing estimation device according to the present invention includes a received signal memory that outputs a plurality of sample groups each of which is a first number of samples extracted at symbol rate intervals from an oversampled received signal containing a known sequence, with shifting their leading positions by one sample from each other, a reliability calculation unit that calculates a channel impulse response for each of the sample groups, based on the sample group, generates a replica of the received signal using the channel impulse response and the known sequence, and calculates a reliability value based on the sample group, the replica, and the channel impulse response, and a timing estimation unit that estimates a preceding wave arrival timing and a delayed wave arrival timing, based on the reliability value.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: June 9, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Takeshi Kawamoto, Takehiko Nishide, Koji Tomitsuka, Masatsugu Higashinaka
  • Patent number: 10680682
    Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine, based at least in part on a set of channel state information reference signals (CSI-RSs), a plurality of hypotheses associated with a plurality of transmission/reception points (TRPs), wherein the UE is configured to receive non-coherent transmissions across the plurality of TRPs according to at least one of a transparent transmit diversity scheme, a non-transparent transmit diversity scheme, or a closed-loop block diagonal precoder scheme, and wherein a coherent precoder is configured within each of the plurality of TRPs. In some aspects, the UE may determine, based at least in part on the plurality of hypotheses, channel state information (CSI) feedback associated with the plurality of TRPs. Numerous other aspects are provided.
    Type: Grant
    Filed: May 8, 2019
    Date of Patent: June 9, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Seyed Ali Akbar Fakoorian, Xiaoxia Zhang, Srinivas Yerramalli, Arumugam Chendamarai Kannan, Jing Sun
  • Patent number: 10673545
    Abstract: Noise test systems, methods, and circuitries are provided for determining a noise characteristic of a receiver. In one example, an integrated circuit device includes an active RF receiver element configured to process a radio frequency (RF) signal to generate a receiver signal; an up-conversion mixer configured to up-convert a test signal to generate an RF test signal; an attenuator configured to selectively adjust a power of the RF test signal to generate adjusted RF test signals; and a coupler configured to couple the adjusted RF test signals to an input of the active RF receiver element. In another example, instead of or in addition to the attenuator, the integrated circuit device includes first, second, and third power sensors configured to measure a power of the test signal, the RF test signal, and the receiver signal, respectively. The power measurements are used to determine the noise characteristic.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: June 2, 2020
    Assignee: Infineon Technologies AG
    Inventors: Manoj Kurvathodil, Thomas Obermueller
  • Patent number: 10673500
    Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) having partially coherent antennas may be configured for simultaneous transmissions on groups of antennas (e.g., multiple pairs of antennas). To achieve the benefits of simultaneous transmissions using groups of antenna that are partially coherent, without having the transmissions affect each other (e.g., interference), the UE may apply a hybrid closed-loop multiple-input multiple-output (MIMO) scheme among each antenna in the antenna groups where phase coherence can be maintained. Following the hybrid closed-loop MIMO scheme, the UE may apply a transparent diversity scheme across each antenna of the groups. Alternatively, the UE may first apply the transparent diversity scheme and next apply the hybrid closed-loop MIMO scheme.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: June 2, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Yi Huang, Gokul Sridharan, Wei Yang, Taesang Yoo, Peter Gaal
  • Patent number: 10673475
    Abstract: The disclosure provides a transmitter of a communication system using hybrid digital/analog beamforming and configured to perform digital pre-distortion (DPD). In an exemplary embodiment in accordance with the disclosure, the transmitter may generate a plurality of scrambling sequences. The transmitter may comprise a plurality of combining modules to receive a combined feedback signal. The transmitter may use the plurality of scrambling sequences to recover the signals output by the antenna arrays from the combined feedback signal. Thus, the transmitter may perform DPD for each antenna array.
    Type: Grant
    Filed: October 14, 2019
    Date of Patent: June 2, 2020
    Assignee: Industrial Technology Research Institute
    Inventors: Wei-Cheng Zhuo, Wei-Min Lai, Jia-Ming Chen, Jen-Yuan Hsu
  • Patent number: 10673476
    Abstract: This disclosure describes a receiver having equalization with noise de-whitening mitigation for wireless communication. An input port receives, via an antenna, a signal communicated over a wireless communication link, the signal comprising a noise component. Control circuitry performs zero forcing equalization of the received signal to generate a zero forcing equalization result signal. The zero forcing equalization causes de-whitening of the noise component by increasing a correlation among elements of the noise component. The control circuitry mitigates the de-whitening of the noise component by: determining a noise variance value based on channel properties of the wireless communication link, and modifying the zero forcing equalization result signal based on the noise variance value. The modified zero forcing equalization result signal is communicated, via an output port, to log-likelihood ratio (LLR) generation circuitry for LLR computation.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: June 2, 2020
    Assignee: NXP USA, Inc.
    Inventors: Sayak Roy, Salil Kashyap, Ankit Sethi, Sudhir Srinivasa
  • Patent number: 10666342
    Abstract: Certain aspects of the present disclosure provide techniques for beam management using adaptive learning. Certain aspects provide a method that can be performed by a node, such as user equipment (UE) or a base station (BS). The node determines one or more beams to utilize for a beam management procedure using adaptive learning. The node performs the beam management procedure using the determined one or more beams. In some aspects, the node uses an adaptive reinforcement learning algorithm to select beams for measurement in beam discovery procedure. The node may adaptive the beam management algorithm based on feedback associated with the beam selection, such as based on a throughput achieved using a beam pairing determined during the beam management procedure.
    Type: Grant
    Filed: May 1, 2019
    Date of Patent: May 26, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Shay Landis, Assaf Touboul, Arthur Gubeskys, Alexei Yurievitch Gorokhov, Aamod Dinkar Khandekar
  • Patent number: 10666483
    Abstract: A transmitter transmitting payload data using OFDM symbols includes a frame builder configured to receive the payload data and to receive signalling data for use in detecting and recovering the payload data at a receiver, and to form the payload data and the signalling data into frames for transmission. A modulator can modulate a first OFDM symbol with the signalling data forming a first of the frames and modulate one or more second OFDM symbols with the payload data forming one or more other frames, and a transmission unit transmits the first and second OFDM symbols. The first OFDM symbol is combined before transmission with a signature sequence that can be configured to allow for detection of the first OFDM symbol at the receiver and decoding the signalling data before the one or more second OFDM symbols carrying the payload data and at lower signal to noise ratios.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: May 26, 2020
    Assignee: SATURN LICENSING LLC
    Inventor: Samuel Asangbeng Atungsiri
  • Patent number: 10666345
    Abstract: A device and method for a user equipment (UE) to perform packet detection using multiple receive antennas. The UE receives a first signal at two or more of the plurality of receive antennas. The UE determines a first combined signal parameter based on the first signal received at the two or more receive antennas. The UE receives a second signal at the two or more receive antennas. The UE determines a second combined signal parameter based on the second signal received at the two or more receive antennas. The UE detects a packet based on at least identifying a correlation between the first combined signal parameter and the second combined signal parameter.
    Type: Grant
    Filed: April 10, 2019
    Date of Patent: May 26, 2020
    Assignee: Apple Inc.
    Inventors: Michael Kerner, Shay Gershoni, Ido Kalderon
  • Patent number: 10659061
    Abstract: A divider-less fractional digital phase locked loop (PLL) is disclosed and can include a time-to-digital converter (TDC) to receive a reference clock signal and a digitally control oscillator (DCO) clock signal, and generate a phase difference signal based on the reference clock signal and the DCO clock signal. A counter coupled in parallel to the TDC can receive the clock signal and count an output frequency of the clock signal to detect reference noise within the reference signal that is above a threshold. A sampler can sample an output of the counter using a replica of the reference signal, and generate a plurality of samples. A sample selector can select one of the plurality of samples based on the phase difference signal. A digital phase detector (DPD) can generate an output phase measurement based on the phase difference signal and the selected sample of the plurality of samples.
    Type: Grant
    Filed: December 27, 2016
    Date of Patent: May 19, 2020
    Assignee: Intel Corporation
    Inventors: Elias Nassar, Eyal Fayneh, Inbar Falkov, Elan Banin, Rotem Banin, Ofir Degani, Samer Nassar
  • Patent number: 10659264
    Abstract: A digital transmission system includes a transmitter configured to transmit an orthogonal frequency division multiplexing (OFDM) signal along a signal path, a receiver for receiving the OFDM signal from the transmitter and extracting OFDM symbols from the received OFDM signal, and a diagnostic unit configured to (i) demodulate the received OFDM signal to create an ideal signal, (ii) compare the received OFDM signal with the ideal signal to calculate an error signal, (iii) cross-correlate the error signal with the ideal signal, and (iv) determine a level nonlinear distortion from one of the transmitter and the signal path based on the correlation of the error signal with the ideal signal.
    Type: Grant
    Filed: January 16, 2019
    Date of Patent: May 19, 2020
    Assignee: Cable Television Laboratories, Inc
    Inventor: Thomas H. Williams
  • Patent number: 10659123
    Abstract: 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), is disclosed. The system includes an apparatus of a base station. The apparatus may include: at least one transceiver, and at least one processor connected to the at least one transceiver, where the at least one processor is configured to transmit to a terminal, configuration information of reference signals for beam management regarding a transmit (Tx) beam of the BS or a receive (Rx) beam of the terminal, transmit the reference signals to the terminal, and the configuration information comprises information related to a number of repetitions of the reference signals.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: May 19, 2020
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Namjeong Lee, Taeyoung Kim, Hyunseok Ryu, Jeongho Park, Hyukmin Son, Peng Xue, Hyunkyu Yu
  • Patent number: 10652035
    Abstract: In a PoE system, DC power is transmitted over two wire pairs. The primary winding of an isolation transformer is connected across the differential I/O terminals of a first PHY (a transceiver). A positive voltage output of a power supply is connected to a center tap of the secondary winding, and the secondary winding is coupled across a first wire pair. In this way, differential data and DC power is supplied to the first wire pair. A CMC is connected between the secondary winding and an autotransformer which is also connected across the first wire pair. A center tap of the autotransformer is also connected to the positive voltage output of the power supply, so that the current to the powered device is shared by the isolation transformer and the autotransformer. A similar circuit, with a second PHY, is used for the DC power return path.
    Type: Grant
    Filed: June 6, 2019
    Date of Patent: May 12, 2020
    Assignee: Linear Technology Holding LLC
    Inventor: Gitesh Bhagwat
  • Patent number: 10644831
    Abstract: Aspects of the subject disclosure may include, for example, a waveguide system for detecting a condition that adversely affects a propagation of electromagnetic waves generated by the waveguide system on a surface of the transmission medium, and adjusting characteristics of the electromagnetic waves generated by the waveguide system to reduce adverse effects caused by the condition. Other embodiments are disclosed.
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: May 5, 2020
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Paul Shala Henry, Robert Bennett, Irwin Gerszberg, Farhad Barzegar, Donald J. Barnickel, Thomas M. Willis, III
  • Patent number: 10644778
    Abstract: Per given time instance, K samples b are acquired from a signal r, which is based at least on K transmitted symbols x and a transfer matrix H of a communication channel, and a linear detection matrix A of a size K×K is acquired, which is based at least on the transfer matrix H (S101). For the K samples b and the linear detection matrix A, at most K(K?1) tentative parameters b{tilde over (?)} and at most K(K?1) tentative parameters A{tilde over (?)} are iteratively calculated (S102). It is checked whether or not the tentative parameters b{tilde over (?)} and A{tilde over (?)} have converged (S103). If b{tilde over (?)} and A{tilde over (?)} have converged, K estimation values x{circumflex over (?)} are decided for the K transmitted symbols x based on b{tilde over (?)} and A{tilde over (?)} (S104). If b{tilde over (?)} and A{tilde over (?)} have not converged, it is returned to the iteratively calculating b{tilde over (?)} and A{tilde over (?)} for the K samples b.
    Type: Grant
    Filed: June 7, 2019
    Date of Patent: May 5, 2020
    Assignee: Nokia Technologies, Oy
    Inventor: Ori Shental
  • Patent number: 10644905
    Abstract: A transmission device of the disclosure includes a first selector configured to select one of a first signal and a second signal, and output the selected signal; a second selector configured to select one of an inversion signal of the first signal, the second signal, and an inversion signal of the second signal, and output the selected signal; a first control signal generator configured to generate a first control signal, a second control signal, and a third control signal, based on the first signal, the second signal, and a third signal; a first driver configured to set a voltage of a first output terminal, based on an output signal of the first selector and the first control signal; and a second driver configured to set a voltage of a second output terminal, based on an output signal of the second selector and the second control signal.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: May 5, 2020
    Assignee: Sony Corporation
    Inventor: Takanori Saeki
  • Patent number: 10637451
    Abstract: A pulse position modulation circuit includes a delay locked loop circuit configured to include a plurality of delay circuits coupled in a cascade, each of the plurality of delay circuits being configured to delay an input signal by a time width corresponding to a control signal so as to generate an output signal, a plurality of pulse generation circuits, each of which is configured to generate a pulse with a pulse width corresponding to a phase difference between a first signal and a second signal which have different phases from each other at different timings corresponding to states of the first signal and the second signal, each of the first signal and the second signal being the input signal or the output signal of the plurality of delay circuits, and a selection circuit configured to select pulses generated by the plurality of pulse generation circuits.
    Type: Grant
    Filed: July 25, 2019
    Date of Patent: April 28, 2020
    Assignee: FUJITSU LIMITED
    Inventor: Ikuo Soga
  • Patent number: 10637529
    Abstract: Generated chirp pulses are modified so that they have an increased time bandwidth product to compensate for noise and/or attenuation in a communication channel. In certain circumstances, the modification alone may be inefficient so a counterbalancing modification may be applied at the receiver.
    Type: Grant
    Filed: February 23, 2018
    Date of Patent: April 28, 2020
    Assignee: Raptor Oil Limited
    Inventors: Colin Maclean, Gordon Cowie