Patents Examined by Chieh M. Fan
  • Patent number: 10785075
    Abstract: The present disclosure includes a time-to-digital converter (TDC) based RF-to-digital (RDC) data converter for time domain signal processing polar receivers. Polar data conversion achieves better SNR tolerance owing to its phase convergence near the origin in a polar coordinate. The proposed RDC consists of a TDC for phase detection and an analog-to-digital converter (ADC) for amplitude conversion. Unlike the conversional data converter, the proposed ADC's sampling position is guided by the detected phase result from the TDC's output. This TDC assisted data-converter architecture reduces the number of bits required for the ADC. In addition, oversampling is no longer needed. With precisely controlled tunable delay cells and gain compensator, this hybrid data convertor is capable to directly convert Quadrature Amplitude Modulation (QAM) waveforms and Amplitude Phase Shift Keying (APSK) waveforms directly from the RF signal without down-conversion.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: September 22, 2020
    Assignee: Auburn University
    Inventors: Fa Dai, Hechen Wang
  • Patent number: 10708093
    Abstract: Some embodiments include apparatus and methods using a first latch in a decision feedback equalizer (DFE), a second latch in the DFE, and circuitry coupled to the first and second latches. The second latch includes a first input node coupled to an output node of the first latch. The circuitry includes a first input node coupled to the first output node, a second input node coupled to a second output node of the second latch, and an output node to provide information having a first output value based on first values of information at the first and second output nodes and a second output value based on second values of information at the first and second output nodes.
    Type: Grant
    Filed: August 24, 2018
    Date of Patent: July 7, 2020
    Assignee: Intel Corporation
    Inventors: Shenggao Li, Ji Chen
  • Patent number: 10616030
    Abstract: Systems for utilizing bandwidth of a wireless network in an efficient manner are disclosed. Bandwidth may be allocated between different types of devices by dividing a symbol constellation into subsets of points, where each of the subsets may be used for transmitting data from a different device to a base station on single frequency channel. The symbol constellation may be shared on the frequency channel by dynamic or static allocation of the subsets of points to different devices. A first device with high data speed requirements may be allocated a first subset of points of the symbol constellation fix transmitting data to the receiver, while a second device with lower data speed requirements may be allocated a second smaller subset of the symbol constellation for transmitting data to a receiver. The first and second devices may then transmit data to the receiver on the frequency channel.
    Type: Grant
    Filed: May 20, 2017
    Date of Patent: April 7, 2020
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Amer Hassan, Edward Giaimo
  • Patent number: 10608726
    Abstract: Presently disclosed are systems and methods for beamforming training in WLANs. In various embodiments, there are unified MIMO beamforming training procedure, which includes a training period in which an initiator transmits multiple unified training frames for performing a transmit-beamforming training of the initiator and a receive-beamforming training of one or more responders; a feedback period in which each responder replies with a beamforming-feedback response; and an acknowledgement period during which the initiator transmits respective acknowledgement frames to the one or more responders from which responses were received. Rules for restricted random access in various slots of the feedback period may be implemented, to address response contention between multiple qualifying responders.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: March 31, 2020
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Hanqing Lou, Xiaofei Wang, Oghenekome Oteri
  • Patent number: 10587255
    Abstract: A PAM (Pulse Amplitude Modulation) modulator driver is configured to receive a PAM input signal having N input amplitude levels and provide a PAM output signal having N output amplitude levels, where N is an integer. The PAM modulator driver circuit configured to electrically adjust amplitude levels in the PAM output signal.
    Type: Grant
    Filed: July 20, 2017
    Date of Patent: March 10, 2020
    Assignee: Skorpios Technologies, Inc.
    Inventors: Andrew Bonthron, Phuoc Nguyen, Viktor Novozhilov, Michael Nilsson, Wei-Min Kuo
  • Patent number: 10581586
    Abstract: A sensor device capable of adjusting at least one clock signal of the sensor device according to a communication between a host and an auxiliary device through a specific bus includes a first oscillator circuit and a processing circuit. The first oscillator circuit is configured for generating a first clock signal. The processing circuit is configured for calibrating a clock frequency of the first clock signal according to the communication between the host and the auxiliary device.
    Type: Grant
    Filed: September 4, 2017
    Date of Patent: March 3, 2020
    Assignee: PixArt Imaging Inc.
    Inventors: Chien-Lung Liao, Hsin-Chi Cheng, Shan-Jung Chang, Yi-Lun Huang
  • Patent number: 10581482
    Abstract: A method for calibrating a radiofrequency multichannel subsystem of a telecommunications payload includes a step of generating and injecting a calibration signal at one or more input access channel injection points; a step of tapping off the injected and propagated calibration signal at tapping-off points of an access channel at output; and then a step of estimating the amplitude and/or phase differences between the internal channels of the multichannel subsystem on the basis of the calibration signal injected at input, serving as a reference, and of the extracted calibration signal or signals; and then a step of correcting the amplitude and/or phase differences by way of correction means. The injected calibration signal is a chirp signal, formed of a chirp or of a sequence of at least two identical chirps. A calibration system implements the calibration method.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: March 3, 2020
    Assignee: THALES
    Inventors: Aline Briand, Eddy Soulez, Cécile Larue De Tournemine, Walid Karoui
  • Patent number: 10581661
    Abstract: Provided is a data processing method and apparatus. The method includes: performing an inverse fast Fourier transform (IFFT) on data and processing the data with a preset function. The preset function is the product of a first function and a second function. The first function is a function in a time domain obtained by performing a Fourier transform on a root-raised cosine function in a frequency domain. The second function is in the time domain.
    Type: Grant
    Filed: January 17, 2017
    Date of Patent: March 3, 2020
    Assignee: ZTE CORPORATION
    Inventors: Yu Xin, Guanghui Yu, Jun Xu
  • Patent number: 10574396
    Abstract: A method for transmitting data in a multiple-input-multiple-output space-time coded communication using a mapping table mapping a plurality of symbols defining the communication to respective antennae from amongst a plurality of transmission antennae and to at least one other transmission resource. The mapping table may comprise Alamouti-coded primary segments and may also comprise secondary segments, comprising primary segments. The primary segments in the secondary segments may be defined in accordance to an Alamouti based code pattern applied at the segment level to define a segment-level Alamouti based code.
    Type: Grant
    Filed: May 3, 2019
    Date of Patent: February 25, 2020
    Assignee: Apple Inc.
    Inventors: Robert Novak, Hosein Nikopourdeilami, Mo-Han Fong, Sophie Vrzic
  • Patent number: 10560133
    Abstract: To provide a device for radio communication using a plurality of antennas, in which: an amplitude/phase adjuster (1) and an amplitude/phase controller (1) control the amplitude and the phase of signals input from at least two antennas such that a directivity, allowing a desired signal to be obtained; an amplitude/phase adjuster (2) and an amplitude/phase controller (2) control the amplitude and the phase of the signals input from the antennas such that an arrival direction of the desired signal becomes a null point and that a directivity, allowing a signal other than the desired signal to be obtained; a signal synthesizer (1) combines the signals; a signal synthesizer (2) combines the signals; and a desired signal generator removes a signal from the signal synthesizer (2) from a signal from the signal synthesizer (1).
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: February 11, 2020
    Assignee: Hitachi Kokusai Electric Inc.
    Inventors: Koji Yotsumoto, Yoichi Kushioka, Mitsuhiro Takashima
  • Patent number: 10541852
    Abstract: Processing of a data packet within a received wireless signal includes determining a frequency modulation (“FM”) domain carrier frequency offset (“CFO”) estimate component from a plurality of samples of the received wireless signal, determining a phase domain CFO estimate component from the plurality of samples of the received wireless signal, and determining a CFO estimation as a function of the FM domain CFO estimate component and the phase domain CFO estimate component. The data packet may be a Bluetooth Low Energy data packet. The FM domain CFO estimate component and the phase domain CFO estimate component may be determined from samples of a preamble field of the data packet.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: January 21, 2020
    Assignee: NXP USA, Inc.
    Inventors: Mihai-Ionut Stanciu, Khurram Waheed
  • Patent number: 10530628
    Abstract: A Long Range (LoRa) communication system with an improved data rate and method thereof are provided. When a packet to be transmitted is received, a transmission device determines a transmission scheme. When the determined transmission scheme is an enhanced transmission scheme, the transmission device transmits a preamble signal indicating that a packet is to be transmitted using the enhanced transmission scheme, converts n-th data of the packet to an up-chirp signal, converts (n+1)-th data of the packet to a down-chirp signal, generates a transmission signal by adding the n-th data converted to the up-chirp signal and the (n+1)-th data converted to the down-chirp signal, and transmits the transmission signal to a reception device.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: January 7, 2020
    Assignee: PUSAN NATIONAL UNIVERSITY INDUSTRY—UNIVERSITY COOPERATION FOUNDATION
    Inventors: Young-Hwan Yoo, Sungryul Kim
  • Patent number: 10529391
    Abstract: A device includes a signal input to receive a data input as part of a bit stream. The device also includes a reference input to receive a reference signal. The device further includes push circuitry to receive a first weight value, receive a first correction value, and generate a push signal based on the first weight value and the first correction value to selectively modify the data input as well as pull circuitry to receive a second weight value, receive a second correction value, and generate a pull signal based on the second weight value and the second correction value to selectively modify the data input.
    Type: Grant
    Filed: July 19, 2019
    Date of Patent: January 7, 2020
    Assignee: Micron Technology, Inc.
    Inventors: Raghukiran Sreeramaneni, Jennifer E. Taylor
  • Patent number: 10523479
    Abstract: Systems and methods may receive data from a data interface of a base platform, convert the data into an analog signal and modulate the analog signal onto a direct current (DC) power line coupled to a connector of the base platform. Additionally, the modulated analog signal may be received from a DC power line coupled to a connector of a tablet platform, wherein the modulated analog signal is converted to a digital signal and demodulated to recover the data. In one example, the data includes user input data associated with an input device including one or more of a mouse, a keyboard, a keypad or a touchpad.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: December 31, 2019
    Assignee: Intel Corporation
    Inventor: Jeremy Burr
  • Patent number: 10498388
    Abstract: An electronic device includes a processing circuit, a communicating circuit, a memory and programs that are stored in the memory and configured to be executed by the processing circuit. The programs include instructions for: controlling the communicating circuit to communicate with the target device within frequency channels respectively in time slots to perform the frequency hopping communication; in a communication recovery operation, controlling the communicating circuit to scan within the frequency channels respectively in recovery time slots, while the target device is operated and locked within a recovery frequency channel in the frequency channels; and controlling the communicating circuit to be operated and locked within the recovery frequency channel, while the target device scans within the frequency channels respectively in the recovery time slots, wherein the time slots have a first length, and the recovery time slots have a second length shorter than the first length.
    Type: Grant
    Filed: September 9, 2019
    Date of Patent: December 3, 2019
    Assignee: HTC Corporation
    Inventor: Yao-Te Tsai
  • Patent number: 10491169
    Abstract: A driver circuit for a transmitter includes a main path in parallel with an error correction path used for feed-forward error correction. The main path has an amplifier for amplifying a data signal to be transmitted from the transceiver. In parallel with the amplifier is a feedforward error correction circuit that provides an error correction signal that compensates for distortion introduced by the amplifier when the error correction signal is combined with the amplifier's output. The error correction circuit is designed to have a high impedance output so that voltage swings in the data signal do not create a demand for significant current from the feedforward error correction circuit, thereby reducing the current of the error correction signal. As an example, it is possible for the current of the error correction signal to substantially match that which is required to cancel the amplifier distortion, thereby minimizing distortion of the signal.
    Type: Grant
    Filed: April 30, 2017
    Date of Patent: November 26, 2019
    Assignee: ADTRAN, Inc.
    Inventor: Daniel M. Joffe
  • Patent number: 10484043
    Abstract: Described is a system for adaptive blind source separation. A time-series of data points from one or more mixtures of source signals is continuously passed through adaptable filters, where each filter has a corresponding output signal. An error of each output signal is determined, and a filter state of each filter is determined using the error signals. A set of filter center frequencies are adapted using the set of error signals and the filter states, resulting in new filter center frequencies. The set of filter center frequencies are updated with the new filter center frequencies. Finally, separated source signals are extracted from the mixture of signals.
    Type: Grant
    Filed: March 7, 2017
    Date of Patent: November 19, 2019
    Assignee: HRL Laboratories, LLC
    Inventors: Charles E. Martin, Shankar R. Rao, Peter Petre
  • Patent number: 10454522
    Abstract: A frequency hopping communication recovering method includes: communicating a first device and a second device within multiple frequency channels respectively in multiple time slots to perform a frequency hopping communication; in a communication recovery operation, configuring the first device to be operated and locked within a recovery frequency channel in the frequency channels; and in the communication recovery operation, configuring the second device to scan within the frequency channels respectively in multiple recovery time slots. The time slots have a first length, and the recovery time slots have a second length shorter than the first length.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: October 22, 2019
    Assignee: HTC Corporation
    Inventor: Yao-Te Tsai
  • Patent number: 10447465
    Abstract: A signaling system is disclosed. The signaling system includes a first integrated circuit (IC) chip to receive a data signal and a strobe signal. The first IC includes circuitry to sample the data signal at times indicated by the strobe signal to generate phase error information and circuitry to output the phase error information from the first IC device. The system further includes a signaling link and a second IC chip coupled to the first IC chip via the signaling link to output the data signal and the strobe signal to the first IC chip. The second IC chip includes delay circuitry to generate the strobe signal by delaying an aperiodic timing signal for a first time interval and timing control circuitry to receive the phase error information from the first IC chip and adjust the first time interval in accordance with the phase error information.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: October 15, 2019
    Assignee: Rambus Inc.
    Inventors: Bret G. Stott, Craig E. Hampel, Frederick A. Ware
  • Patent number: 10447516
    Abstract: To obtain a high-quality enhanced signal, there is provided an apparatus including a transformer that transforms a mixed signal, in which a first signal and a second signal coexist, into a phase component for each frequency and one of an amplitude component and a power component for each frequency, a change amount generator that generates a change amount of the phase component at a predetermined frequency by using a series of data with a cross-correlation weaker than that of the phase components and randomness lower than that of random numbers, a phase controller that controls the phase component by using the change amount provided from the change amount generator, and an inverse transformer that generates an enhanced signal by using the phase component having undergone control processing by the phase controller.
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: October 15, 2019
    Assignee: NEC CORPORATION
    Inventor: Akihiko Sugiyama