Patents Examined by Khai Tran
  • Patent number: 11115846
    Abstract: A method and apparatus are provided for generating a channel state information report. A set of reference signals transmitted from a base station are received, and a set of beams are identified based on the set of reference signals. The set of reference signals is transformed to obtain a set of vectors of amplitude and phase coefficients of a compressed codebook, each amplitude coefficient vector and phase coefficient vector corresponding to an identified beam in the set of beams. The amplitude coefficient vector for each identified beam in the set of beams is adjusted by a selected value, wherein the selected value is determined such that the amplitude coefficient vector corresponding to a particular beam is normalized to a known predetermined value. A predefined oversampling factor is set to a subset of the set of beams to a value greater than one, wherein the particular beam is excluded from the subset of beams.
    Type: Grant
    Filed: April 3, 2020
    Date of Patent: September 7, 2021
    Assignee: Lenovo (Singapore) Pte. Ltd.
    Inventors: Udar Mittal, Tyler Brown, Ahmed Hindy
  • Patent number: 11112470
    Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes data acquisition circuitry configured to generate magnetic resonance data; a digital encoder connected to receive the magnetic resonance data and configured to digitally encode the magnetic resonance data using an encoding scheme having a spectral null approximately at the Larmor frequency; and an electric data transmission line connected to transmit the digitally encoded magnetic resonance data.
    Type: Grant
    Filed: April 27, 2020
    Date of Patent: September 7, 2021
    Inventors: Yoshinori Hamamura, Mark Spring, Ernie Zepeda
  • Patent number: 11108510
    Abstract: A method and system provides for execution of calibration cycles from time to time during normal operation of the communication channel. A calibration cycle includes de-coupling the normal data source from the transmitter and supplying a calibration pattern in its place. The calibration pattern is received from the communication link using the receiver on the second component. A calibrated value of a parameter of the communication channel is determined in response to the received calibration pattern. The steps involved in calibration cycles can be reordered to account for utilization patterns of the communication channel. For bidirectional links, calibration cycles are executed which include the step of storing received calibration patterns on the second component, and retransmitting such calibration patterns back to the first component for use in adjusting parameters of the channel at first component.
    Type: Grant
    Filed: April 28, 2020
    Date of Patent: August 31, 2021
    Assignee: Rambus Inc.
    Inventors: Frederick A. Ware, Richard E. Perego, Craig E. Hampel
  • Patent number: 11101972
    Abstract: A processing unit processes an input signal from an external apparatus and includes a first terminal to which a reference voltage is input from the external apparatus, a second terminal to which a first pulse signal having a first frequency is input from the external apparatus, and a control portion to process the input signal. A memory stores data to be transmitted to the external apparatus, and a clock generating unit generates a clock signal having a higher frequency than the first frequency of the first pulse signal. To transmit a data signal to the external apparatus from the processing unit, the control portion switches a load between the first terminal and the second terminal based on the data stored in the memory during a period in which a second pulse signal having a second frequency lower than the first frequency is input from the external apparatus.
    Type: Grant
    Filed: September 24, 2019
    Date of Patent: August 24, 2021
    Inventors: Hirotaka Ittogi, Ichiro Iijima, Kenjiro Hori
  • Patent number: 11101830
    Abstract: A system for clock calibration is described herein which comprises a serializer configured to convert an input data stream in parallel format to provide an out data stream in a serial format; a clock source configured to generate one or more clock signals; a first frequency divider configured to provide at least one divided clock signal of the one or more clock signals; a delay line configured to delay at least one divided clock signal; and a clock calibrator configured to control delay of the at least one divided clock signal at the delay line to adjust the one or more divided clock signals at a fixed relationship with respect to the one or more clock signals based on voltage and temperature variation.
    Type: Grant
    Filed: July 26, 2019
    Date of Patent: August 24, 2021
    Assignee: Synopsys, Inc.
    Inventors: Shourya Kansal, Ravi Mehta, Biman Chattopadhyay
  • Patent number: 11095486
    Abstract: A digital circuit for implementing a channel-tracking functionality, in which an adaptive (e.g., FIR) filter is updated based on reinforcement learning. In an example embodiment, the adaptive filter may be updated using an LMS-type algorithm. The digital circuit may also include an electronic controller configured to change the convergence coefficient of the LMS algorithm using a selection policy learned by applying a reinforcement-learning technique and based on residual errors and channel estimates received over a sequence of iterations. In some embodiments, the electronic controller may include an artificial neural network. An example embodiment of the digital circuit is advantageously capable of providing improved performance after the learning phase, e.g., for communication channels exhibiting variable dynamicity patterns, such as those associated with aerial copper cables or some wireless channels.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: August 17, 2021
    Assignee: Nokia Solutions and Networks OY
    Inventor: Paschalis Tsiaflakis
  • Patent number: 11082011
    Abstract: Preventing RF signal distortion and signal error producing memory events in a Radio Frequency (RF) power amplifier (RFPA). An element, disposed prior to the Radio Frequency (RF) power amplifier (RFPA) in a signal path of a RF signal input to the RFPA, may enforce a maximum allowable amplitude in a high PAPR instantaneous high peak of the RF signal. An element may also increase or supplement a bias of the Radio Frequency (RF) power amplifier (RFPA) when a high PAPR instantaneous high peak is detected in the RF signal prior to receipt by the RFPA. Additionally, a first element operable detects when an instantaneous output voltage of the Radio Frequency (RF) power amplifier (RFPA) is below a predetermined voltage, and in response, a second element supplies additional current to prevent the output voltage of the RFPA from falling below a predetermined threshold voltage.
    Type: Grant
    Filed: February 3, 2020
    Date of Patent: August 3, 2021
    Assignee: Harmonic, Inc.
    Inventor: Adi Bonen
  • Patent number: 11082082
    Abstract: The present disclosure provides a signal calibration method, apparatus and device generated based on an imbalance of I path and Q path. The method includes sending a cosine signal and a sine signal through a signal generator, transmitting the cosine signal and the sine signal in the I path and the Q path respectively, the cosine signal and the sine signal being configured to loop back to a signal receiving direction after passing through a transmitting amplifier; processing a signal obtained by a down converter in the signal receiving direction; performing a phase adjustment and an amplitude adjustment by adjusting the signal generator, gain amplifiers of I path and Q path analog domains, and a corresponding digital domain, so as to determine an appropriate phase cancellation value and an appropriate amplitude cancellation value for an image signal; and calibrating the image signal corresponding to the signal to be calibrated.
    Type: Grant
    Filed: December 29, 2018
    Date of Patent: August 3, 2021
    Assignee: Radiawave Technologies Co., Ltd.
    Inventors: Liuan Zhang, Ning Zhang, Haigang Feng, Jon Sweat Duster, Yulin Tan
  • Patent number: 11079778
    Abstract: A controller for use in a power converter including a jitter generator circuit coupled to receive a drive signal from a switch controller and generate a jitter signal. The jitter signal is a modulated jitter signal when the drive signal is below a first threshold frequency. The switch controller is coupled to a power switch coupled to an energy transfer element. The switch controller is coupled to receive a current sense signal representative of a current through the power switch. The switch controller is coupled to generate the drive signal to control switching of the power switch in response to the current sense signal and the jitter signal to control a transfer of energy from an input of the power converter to an output of the power converter.
    Type: Grant
    Filed: February 14, 2020
    Date of Patent: August 3, 2021
    Inventors: Giao Minh Pham, Lance M. Wong
  • Patent number: 11075740
    Abstract: Systems/methods comprising a plurality of devices that cooperate with one another, particularly when in proximity to one another, are disclosed. According to some embodiments, first information is relayed from a first device to a second device and second information is relayed from the second device to the first device. The second device may transmit a signal, comprising the first information, to a destination device; and the first device may transmit a signal, comprising the second information, to the destination device. A plethora of embodiments are disclosed including a new carrier aggregation system/method that capitalizes on resources that may be provided by a plurality of devices that cooperate with one another.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: July 27, 2021
    Assignee: ENK Wireless, Inc.
    Inventor: Peter D. Karabinis
  • Patent number: 11063628
    Abstract: A communication device capable of echo cancellation includes a digital circuit, a transmitter circuit, a hybrid circuit, an adjustable capacitor circuit, and a receiver circuit. The digital circuit transmits a digital transmission signal and receives a digital reception signal. The transmitter circuit outputs an analog transmission differential signal according to the digital transmission signal. The hybrid circuit outputs a transmission signal to an external circuit via an adjustable capacitor circuit according to the analog transmission differential signal, and outputs an analog reception differential signal to a receiver circuit according to at least one of the analog transmission differential signal and a reception signal from the external circuit. The adjustable capacitor circuit controls a delay difference between positive-end and negative-end signals of the transmission signal according to an echo cancellation control signal.
    Type: Grant
    Filed: June 1, 2020
    Date of Patent: July 13, 2021
    Inventors: Liang-Wei Huang, Yu-Xuan Huang
  • Patent number: 11063654
    Abstract: A diversity receiver and a terminal are provided. The diversity receiver includes a first main channel and a first diversity channel, the first main channel includes an antenna diplexer and a first main transmission channel, and the first diversity channel includes a tunable bandpass filter and a first diversity receiving channel. The first diversity receiving channel is coupled to a diversity antenna by using the tunable bandpass filter, and the tunable bandpass filter is configured to: adjust a passband bandwidth of the tunable bandpass filter according to a band bandwidth of a first transmit signal generated by the first main transmission channel and a band bandwidth of a first receive signal received from the diversity antenna, and perform bandpass filtering based on the passband bandwidth on the first receive signal.
    Type: Grant
    Filed: April 10, 2020
    Date of Patent: July 13, 2021
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Weinan Li, Xiaoran Li, Jian Liang
  • Patent number: 11063695
    Abstract: The invention relates to an apparatus for selecting candidates in a K-Best algorithm of a MIMO decoder. The K-Best algorithm uses a layered structure comprising a first layer and subsequent layers. In each subsequent layer 2L candidates are selected by iteratively carrying out a selection step, wherein in the selection step the apparatus is configured to calculate and select at least two candidates having minimum distance values of a candidate group, and after each iteratively carried out selection step, the selected at least two candidates are sent to a further subsequent layer for iteratively generating a further candidate group of 2L candidates in the further subsequent layer.
    Type: Grant
    Filed: July 10, 2020
    Date of Patent: July 13, 2021
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yaron Ben-Arie, Chun Hang Lee, Genadiy Tsodik, Shimon Shilo, Doron Ezri
  • Patent number: 11057245
    Abstract: A wireless communication method and a wireless communication device. An electronic device for a first communication device in a wireless communication system includes: storage device configured to store an analog codebook for the first communication device, the analog codebook including a plurality of sets of first configuration parameters for a set of phase shifters of the first communication device; and a processing circuit configured to: perform channel estimation on a first channel from a second communication device to the first communication device respectively based on the plurality of sets of first configuration parameters and signal transmission from the second communication device, select a set of first configuration parameters corresponding to ones of channel estimation results that satisfy a first predetermined condition to generate a reduced analog sub-codebook, configure signal transmission from the first communication device to the second communication device based on the analog sub-codebook.
    Type: Grant
    Filed: March 18, 2020
    Date of Patent: July 6, 2021
    Inventors: Peiyao Zhao, Zhaocheng Wang, Jinhui Chen
  • Patent number: 11057257
    Abstract: A method and device for timing alignment are disclosed. The method includes widening spectra of two signals for timing misalignment estimation; performing cross-correlation between the two spectrum-widened signals; and estimating the timing misalignment between the two signals according to a result of the cross-correlation. Therefore, an accurate time alignment result will be obtained with low complexity. Furthermore, it will be appropriate for all types of signals including separated multi-carrier signals.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: July 6, 2021
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Peng Liu, Junfeng Jie
  • Patent number: 11050457
    Abstract: Circuits for continuous-time analog correlators are provided, comprising: a first VCO that receives an input signal and that outputs a first pulse frequency modulated (PFM) output signal; a second VCO that receives a reference signal and that outputs a second PFM output signal; a first phase frequency detector (PFD) that receives the first PFM output signal and the second PFM output signal and that produces a first PFD output signal; a first delay cell that receives the first PFM output signal and that produces a first delayed signal (DS); a second delay cell that receives the second PFM output signal and that produces a second DS; a second PFD that receives the first DS and the second DS and that produces a second PFD output signal; and a capacitor-digital-to-analog converter (capacitor-DAC) that receives the first PFD output signal and the second PFD output signal and that produces a correlator output.
    Type: Grant
    Filed: June 1, 2020
    Date of Patent: June 29, 2021
    Assignee: The Trustees of Columbia University in the City of New York
    Inventors: Vivek Mangal, Peter R. Kinget
  • Patent number: 11050603
    Abstract: The disclosed systems, structures, and methods are directed to a superposition based transceiver. The configurations presented herein employ a plurality of encoders configured to encode a plurality of input digital data streams, wherein each of the plurality of input digital data streams operates at different data rates, a plurality of modulators configured to modulate the plurality of encoded digital data input streams. In addition, a plurality of transmitter filters configured to perform up-sampling and filtering of the plurality of modulated digital data streams, and a signal mixer configured to combine the plurality of up-sampled and filtered digital data streams into a single aggregate digital data stream in a manner such that the single aggregate digital data stream contains spectral characteristics that substantially conform to both a central area and a skirt area of a unified spectral emission mask, as specified by European Telecommunications Standards Institute (ETSI).
    Type: Grant
    Filed: April 9, 2020
    Date of Patent: June 29, 2021
    Inventors: Ming Jian, Ayman Mostafa Mohammad Mostafa Mostafa, Lutz Hans-Joachim Lampe, Hoda Shahmohammadian, Jordan Philip Naterer
  • Patent number: 11050490
    Abstract: Methods and systems capable of launching signal-carrying transverse electromagnetic waves onto a transmission line in the higher voltage region of the transmission distribution network. Such methods and systems may include a surface wave launcher located in the higher voltage region, a network unit located in a lower voltage region, and an arrester separating the surface wave launcher and the network unit, the arrester preventing voltage from arcing over from the higher voltage region to the lower voltage region where the arrester provides the signal to the surface wave launcher.
    Type: Grant
    Filed: March 9, 2020
    Date of Patent: June 29, 2021
    Assignee: ARRIS Enterprises LLC
    Inventors: David B. Bowler, Shaoting Gu, Xinfa Ma, Clarke V. Greene, David Grubb, III, Samuel Francois, Lawrence M. Hrivnak, Bruce C. Pratt, Theodore A. Colarusso, Thomas F. Kister, Robert Noonan, Vincent T. Lucarini, David F. Hubbell
  • Patent number: 11044125
    Abstract: A method performed by a node in a wireless communications network for improving multi-user transmissions in the wireless communications network is provided. The node determines channel estimates based on demodulation reference signals, or a data symbol in at least one Physical Resource Block, PRB, of the latest received subframe. Then, the node determines a phase difference and an amplitude difference between Resource Elements, REs, in a first set of contiguous REs in the at least one PRB of the latest received subframe based on the obtained channel estimates. The node then pre-equalizes at least one channel within at least one PRB of a transmission subframe by aligning the phase and amplitude of REs in a second set of contiguous REs therein based on the determined phase and amplitude differences. A node for improving multi-user transmissions in the wireless communications network is also provided.
    Type: Grant
    Filed: October 10, 2017
    Date of Patent: June 22, 2021
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Efthymios Stathakis, St├ęphane Tessier
  • Patent number: 11038558
    Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). A method of controlling a network comprising a transmission/reception point (TRP) 10 and a user equipment (UE) 20 is provided. Channel measurements related to a first antenna port 13A and a second antenna port 13B are performed by the UE 20. A quasi co-location (QCL) of the first antenna port 13A and the second antenna port 13B is determined, based at least in part on the channel measurements. A network configuration is adjusted, based at least in part on the determined QCL.
    Type: Grant
    Filed: August 10, 2018
    Date of Patent: June 15, 2021
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Shangbin Wu, Yinan Qi