Patents Examined by David S Huang
  • Patent number: 11031991
    Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may communicate with a first base station using a first antenna array of a set of antenna arrays of the UE. The UE may receive, from the base station, an indication that the UE is to use a second antenna array of the set of antenna arrays to transmit a random access signal. The UE may transmit, to the first base station or a second base station, the random access signal using the second antenna array based on the received indication. The UE may transmit the random access signal to the first base station as part of determining an updated timing advance (TA) value for the second antenna array. The UE may transmit the random access signal to the second base station as a part of initial access or handover.
    Type: Grant
    Filed: April 30, 2020
    Date of Patent: June 8, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Jung Ho Ryu, Tianyang Bai, Kiran Venugopal, Yan Zhou, Tao Luo, Junyi Li
  • Patent number: 11018731
    Abstract: A method for signal transmission using precoded symbol information involves estimating a two-dimensional model of a communication channel in a delay-Doppler domain. A perturbation vector is determined in a delay-time domain wherein the delay-time domain is related to the delay-Doppler domain by an FFT operation. User symbols are modified based upon the perturbation vector so as to produce perturbed user symbols. A set of Tomlinson-Harashima precoders corresponding to a set of fixed times in the delay-time domain may then be determined using a delay-time model of the communication channel. Precoded user symbols are generated by applying the Tomlinson-Harashima precoders to the perturbed user symbols. A modulated signal is then generated based upon the precoded user symbols and provided for transmission over the communication channel.
    Type: Grant
    Filed: January 21, 2020
    Date of Patent: May 25, 2021
    Assignee: Cohere Technologies, Inc.
    Inventors: Jim Delfeld, Shlomo Selim Rakib
  • Patent number: 11018799
    Abstract: Disclosed are techniques for wireless communication. In an aspect, a receiver wireless device receives, from a transmitter wireless device, a wireless signal comprising a plurality of modulated symbols forming at least one packet, determines a quantification of impairments associated with the plurality of modulated symbols of the wireless signal, the impairments caused by the receiver wireless device, the transmitter wireless device, or both, determines a remembrance factor based on the quantification of the impairments, and demodulates the plurality of modulated symbols of the wireless signal based on a number of previously demodulated symbols, wherein the number of previously demodulated symbols is based on the remembrance factor.
    Type: Grant
    Filed: July 23, 2020
    Date of Patent: May 25, 2021
    Assignee: QUALCOMM INCORPORATED
    Inventors: Matthew Collins, Ondrej Jakubov, Steven Meade
  • Patent number: 11010319
    Abstract: Aspects of the disclosure provide for a method. In at least some examples, the method includes receiving, at a circuit, data via a differential input signal. The method further includes detecting a falling edge in the data received via the differential input signal. The method further includes holding an output of the circuit at a final logical value of the data. The method further includes disabling a transmitter of the circuit while holding the output of the circuit at the final logical value of the data. The method further includes releasing the output of the circuit from the final logical value of the data.
    Type: Grant
    Filed: May 14, 2020
    Date of Patent: May 18, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Win Naing Maung, Bhupendra Sharma, Huanzhang Huang, Douglas Edward Wente, Suzanne Mary Vining, Mustafa Ulvi Erdogan
  • Patent number: 11005690
    Abstract: A device and method of operation for digital compensation of dynamic distortion. The transmitter device includes at least a digital-to-analog converter (DAC) connected to a lookup table (LUT), a first shift register, and a second shift register. The method includes iteratively adjusting the input values via the LUT to induce changes in the DAC output that compensate for dynamic distortion, which depends on precursors, current cursors, and postcursors. More specifically, the method includes producing and capturing average output values for each possible sequence of three symbols using the shift register and LUT configuration. Then, the LUT is updated with estimated values to induce desired output values that are adjusted to eliminate clipping. These steps are performed iteratively until one or more check conditions are satisfied. This method can also be combined with techniques such as equalization, eye modulation, and amplitude scaling to introduce desirable output signal characteristics.
    Type: Grant
    Filed: March 20, 2020
    Date of Patent: May 11, 2021
    Assignee: INPHI CORPORATION
    Inventors: Dragos Cartina, Ankit Bhargav, Jamal Riani, Wen-Sin Liew, Yu Liao, ChangFeng Loi
  • Patent number: 11005696
    Abstract: A system and method of DFT-S-OFDM modulation is provided that uses a set of frequency domain patterns. For a given transmitter, for a set of DFT-S-OFDM symbols, the frequency domain pattern changes according to a time domain hopping pattern. Advantageously, the time domain hopping patterns are defined to allow only a certain amount of overlap, for example for only one DFT-S-OFDM symbol, between any two time domain hopping patterns. This functions to reduce the effect of a collision, when two transmitters use the same frequency pattern, they will do so only for part of the overall transmission. Optionally, frequency domain spectral spreading is used in the transmitter. This can further reduce the PAPR. In the receiver, successive interference cancellation may be employed to reduce the effect of colliding transmissions.
    Type: Grant
    Filed: May 1, 2020
    Date of Patent: May 11, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Ming Jia, Jianglei Ma
  • Patent number: 11005540
    Abstract: Disclosed herein are methods and systems for processing signals from multiple users at an antenna array, and to provide beamforming for transmitting to those multiple users, and more particularly for channel estimation and wireless signal recovery in wireless networks carrying transmissions in the millimeter wave frequency bands to enable such beamforming. Such methods and systems enable MIMO communications at millimeter wave frequencies for multiple users communicating with a MIMO antenna system, such as a massive MIMO multi-antenna system (multi-antenna arrays that consist of hundreds of antenna elements). Such methods and systems may characterize the communications link (i.e., channel) at that frequency band, and directly provide a precoding matrix for beam steering towards a particular user that is in communication with the antenna system.
    Type: Grant
    Filed: July 8, 2020
    Date of Patent: May 11, 2021
    Assignee: Morgan State University
    Inventors: Arlene Cole-Rhodes, Peter Taiwo
  • Patent number: 10999051
    Abstract: A receiver circuit includes a clock lane propagating a clock signal. A self-sampled clock applies a delayed version of the clock signal to the clock signal and compensation logic controls an amount of delay of the delayed version of the clock, based on a reference voltage offset (difference) between the receiver and a transmitter. The delayed version of the clock is centered on one unit interval of the clock. An offset correction based on a clock duty cycle error is applied to data receiver front ends.
    Type: Grant
    Filed: June 18, 2020
    Date of Patent: May 4, 2021
    Assignee: NVIDIA Corp.
    Inventors: Xi Chen, Nikola Nedovic, Carl Thomas Gray, Stephen G Tell
  • Patent number: 10998940
    Abstract: A method is disclosed for a wireless communication device (WCD) configured to receive, using a combiner selected from a plurality of combiners available at the WCD, downlink transmissions from a wireless communication node (WCN) via a downlink transmission beam selected from a plurality of downlink transmission beams available at the WCN. The method comprises, for each of the plurality of combiners, estimating an interference level experienced at the WCD. The method also comprises transmitting a measurement signal on each of a plurality of uplink transmission beams for selection of the downlink transmission beam by the WCN. Each of the plurality of uplink transmission beams corresponds to a respective one of the plurality of combiners available at the WCD. A signal strength of the measurement signal on an uplink transmission beam is responsive to the estimated interference level for the corresponding combiner. Corresponding arrangement, WCD and computer program product are also disclosed.
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: May 4, 2021
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Leif Wilhelmsson, Dzevdan Kapetanovic, Athanasios Stavridis
  • Patent number: 10999053
    Abstract: A receiver system that includes a clock and data recovery (CDR) system for aligning a local clock signal to an incoming data signal to extract correct timing information from the incoming data signal is provided. A timing error detector generates an output phase error signal representing the phase difference between the incoming data signal and the local clock signal. The timing error detector determines the phase difference according to recovered symbols and the difference between the recovered symbols and digital samples of the incoming data signal. The digital samples of the incoming data signal include intersymbol interference. The output timing information is suitable for aligning the local clock signal to the incoming data signal.
    Type: Grant
    Filed: July 8, 2020
    Date of Patent: May 4, 2021
    Assignee: INPHI CORPORATION
    Inventor: Fernando De Bernardinis
  • Patent number: 10992499
    Abstract: A radio apparatus (10) includes an estimation unit (2) configured to calculate an estimated value of a channel response for each of a plurality of antennas, a padding unit (3) configured to generate a first antenna-space channel vector having dimensions larger than the number of the antennas by combining the estimated value with a padding value, a spatial transformation unit (4) configured to calculate a first beam-space channel vector by spatial transforming the first antenna-space channel vector, a noise suppression unit (5) configured to generate a second beam-space channel vector by suppressing at least one element of the first beam-space channel vector, an inverse spatial transformation unit (6) configured to calculate a second antenna-space channel vector by inversely and spatial transforming the second beam-space channel vector, and an extraction unit (7) configured to determine an estimated value of each channel based on the second antenna-space channel vector.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: April 27, 2021
    Assignee: NEC CORPORATION
    Inventors: Jun Shikida, Kazushi Muraoka, Naoto Ishii
  • Patent number: 10992345
    Abstract: Disclosed is a method for low voltage broadband power line carrier communication; when transmitting a physical layer protocol frame, short preambles are first transmitted to undergo automatic gain control, channel estimation, coarse-grained frequency offset compensation, and symbol synchronization; and then long preambles are transmitted to undergo automatic gain control, channel estimation, fine-grained frequency offset compensation, and symbol synchronization. Compared with the scheme of only transmitting long preambles, the present disclosure combines transmissions of short preambles and long preambles, which thus may quickly and accurately implement frequency offset compensation, automatic gain control, symbol synchronization, and channel estimation without sacrifice of precision, thereby achieving quick convergence, reducing resource overheads and time overheads, and enhancing system performance.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: April 27, 2021
    Assignee: WU QI TECHNOLOGIES, INC.
    Inventors: Songsong Sun, Ren Wei, Qiang Gu, Hongbing Li, Bairu Chen, Anhui Zeng
  • Patent number: 10985807
    Abstract: A base station according to an embodiment supports full-dimension MIMO (FD-MIMO). The base station includes: an antenna array having antenna elements arranged two-dimensionally in a horizontal direction and a vertical direction; and a controller configured to perform a process of transmitting a dedicated reference signal that is a reference signal used for measurement of channel characteristics and is individually generated for a radio terminal. The controller is configured to select a specific target radio terminal from among target radio terminals to be connected to the base station, and perform a process of transmitting the dedicated reference signal only to the specific target radio terminal.
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: April 20, 2021
    Assignee: KYOCERA Corporation
    Inventors: Fangwei Tong, Chiharu Yamazaki, Noriyoshi Fukuta, Akinori Iwabuchi, Hironobu Kobayashi
  • Patent number: 10951204
    Abstract: A digital pulse width modulation driver system and method can include: receiving input digital data with a digital signal processing chip on a device; converting the input digital data into pulse width modulated data; generating an amplitude signal with the digital signal processing chip; transmitting the amplitude signal and the pulse width modulated data from a transmit interface within the device to a receive interface within an analog driver chip; and amplifying the pulse width modulated data with a driver coupled to a high voltage rail based on the amplitude signal corresponding to the high voltage rail, or amplifying the pulse width modulated data with the driver coupled to a low voltage rail based on the amplitude signal corresponding to the low voltage rail.
    Type: Grant
    Filed: August 28, 2019
    Date of Patent: March 16, 2021
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Simon Kenneth Quinn, Ross William Ballany, Rajdeep Mukhopadhyay, Sergei Slavnov
  • Patent number: 10951262
    Abstract: A method can include receiving frequency hop configuration data for a first wireless communication protocol via a second wireless communication protocol in second communication circuits; and configuring first communication circuits to communicate according to the first communication protocol with frequency hopping indicated by the frequency hop configuration data; wherein the first communication circuits and second communication circuits are formed in a same combination device. Related devices and systems are also disclosed.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: March 16, 2021
    Assignee: Cypress Semiconductor Corporation
    Inventor: Raghunatha Kondareddy
  • Patent number: 10944456
    Abstract: A wireless communication device includes a look-up table that stores a beam pattern table, and at least one beamforming antenna transmitting or receiving a radio signal with a beam pattern specified by a set of antenna weight vectors selected from the beam pattern table, where a number of antenna weight vectors for obtaining a beam pattern with a narrow half power beam width for transmission included in the beam pattern table is larger than a number of antenna weight vectors for obtaining a beam pattern with a narrow half power beam width for reception.
    Type: Grant
    Filed: May 1, 2020
    Date of Patent: March 9, 2021
    Assignee: FUJIKURA LTD.
    Inventor: Ken Sakuma
  • Patent number: 10938604
    Abstract: A system for receiving signals transmitted via serial links includes an analog-to-digital converter configured to sample the first analog signal at a first rate, and generate a first digital input signal having a second data rate. The system also includes a decimator coupled to an output of the equalizer and configured to downsample the first equalized signal to a decimated signal having the first data rate. The system further includes a fast equalization module for determining output data corresponding to the communications signal. The fast equalization module includes a filter to access an output of the equalizer, a second slicer module to access an output of the filter and produce a data output corresponding to the communications signal, a lookup table to provide filtering coefficients to the filter, and a coefficient improvement module to improve the coefficients based on an error signal from the filter.
    Type: Grant
    Filed: March 20, 2020
    Date of Patent: March 2, 2021
    Assignee: Macom Technology Solutions Holdings, Inc
    Inventors: Yehuda Azenkot, Georgios Takos, Bart R Zeydel
  • Patent number: 10938606
    Abstract: An equalizer circuit includes a first arithmetic circuit, a second arithmetic circuit, a data sampling circuit, and an edge sampling circuit. The first arithmetic circuit is configured to compensate an equalization sequence by secondary feedback sequences to output a first added sequence. The second arithmetic circuit is configured to compensate the first added sequence by a primary feedback sequence to output a second added sequence. The data sampling circuit samples, according to data clock, the second added sequence to output a primary sequence, and gains the primary sequence to output the primary feedback sequence. The data sampling circuit sequentially samples, according to the data clock, the primary sequence to output secondary sequences. The data sampling circuit gains the corresponding secondary sequences to output the secondary feedback sequences. The edge sampling circuit is configured to sequentially sample, according to an edge clock, the first added sequence to output an edge sequence.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: March 2, 2021
    Assignee: REALTEK SEMICONDUCTOR CORP.
    Inventors: Yao-Chia Liu, Bo-Yu Chen
  • Patent number: 10939132
    Abstract: One example method includes receiving a mixed data stream that was created using a first data stream and a second data stream, the mixed data stream having a compressibility of N, where N is a compressibility merging parameter, and the mixed data stream has a compressibility that is between a compressibility of the first data stream and a compressibility of the second data stream, providing the mixed data stream to an application and/or hardware, observing and recording a response of the application and/or hardware to the mixed data stream, and analyzing the response of the response of the application and/or hardware to the mixed data stream.
    Type: Grant
    Filed: March 31, 2020
    Date of Patent: March 2, 2021
    Assignee: EMC IP HOLDING COMPANY LLC
    Inventors: Salil Dangi, Ernest Daza
  • Patent number: 10922255
    Abstract: Aspects of the disclosure provide for a circuit including a squelch detector having a first input coupled to a first node and configured to receive a positive component of a differential signal with a floating center tap, a second input coupled to a second node and configured to receive a negative component of the differential signal, and an output coupled to a logic circuit, a first resistor coupled between the first node and a third node, a second resistor coupled between the third node and the second node, a third resistor coupled between the first node and a fourth node, a fourth resistor coupled between the fourth node and the second node, a capacitor coupled between the fourth node and a ground terminal, a comparator having a first input coupled to the third node, a second input coupled to a fifth node, and an output coupled to the logic circuit.
    Type: Grant
    Filed: July 27, 2020
    Date of Patent: February 16, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Win Naing Maung, Douglas Edward Wente, Mustafa Ulvi Erdogan, Huanzhang Huang, Saurabh Goyal, Bhupendra Sharma