Patents Examined by Young T. Tse
  • Patent number: 10063308
    Abstract: A radio frequency transmitter device, constituted for transmitting a radio frequency signal in a frequency band comprising at least one transmit subband and at least one receive subband, comprises: a transmit chain for processing a transmit signal associated with the at least one transmit subband; a power amplifier for amplifying the transmit signal; an output port for transmitting the amplified transmit signal; a processing unit for calculating, from the transmit signal associated with the at least one transmit subband, a correction signal in the at least one receive subband making use of a power amplifier model modelling the behavior of the power amplifier; and a coupler for adding the correction signal to the amplified transmit signal for cancelling intermodulation products in the amplified transmit signal produced by the power amplifier.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: August 28, 2018
    Assignee: CommScope Technologies LLC
    Inventor: Keld Knut Lange
  • Patent number: 10050687
    Abstract: A transmission method for simultaneously transmitting a first modulated signal and a second modulated signal at the same frequency includes performing precoding on both signals using a fixed precoding matrix and regularly changing the phase of at least one of the signals. In this method, the power ratio between a plurality of signals transmitted from a plurality of antennas at the same frequency and at the same time differs from the power ratio between a plurality of pilot signals transmitted from the plurality of antennas at the same frequency and at the same time, whereby the accuracy of channel estimation by a reception device is improved.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: August 14, 2018
    Assignee: SUN PATENT TRUST
    Inventors: Yutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi
  • Patent number: 10044404
    Abstract: Methods, systems, and apparatuses, including computer programs encoded on computer-readable media, are configured to spread a first frame of data using a first spreading code to create a spread first frame and to spread a second frame of data using the first spreading code to create a spread second frame. A delay generator generates a first transmission delay and a second transmission delay. A transmitter starts to transmit the first spread frame on a first frame boundary delayed by the first transmission delay and starts to transmit the second spread frame on a second frame boundary delayed by the second transmission delay. A receiver starts to receive a third spread frame on a third frame boundary delayed by the first transmission delay and starts to receive a fourth spread frame on a fourth frame boundary delayed by the second transmission delay.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: August 7, 2018
    Assignee: Ingenu
    Inventors: Daniel Werner, Theodore Myers
  • Patent number: 10044417
    Abstract: System and method embodiments are provided for remote radio unit (RRU) control messaging in massive multiple input multiple output (MIMO) systems. In an embodiment, a network component in a MIMO wireless communication system includes a digital transceiver configured to generate a data signal and a control signal, the control signal including one of control information to control analog components on a RRU and status information about analog components on the RRU; a modulator configured to modulate the control signal onto a control carrier; a transmit filter configured to filter the modulated control signal; and a combiner configured to combine the data signal and the filtered modulated control signal and send the combined signal to a second network component via a physical channel, the second network component comprising one of a controller and the RRU.
    Type: Grant
    Filed: July 7, 2015
    Date of Patent: August 7, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Andrei Buliga, Lan Hu, Sai Mohan Kilambi
  • Patent number: 10033561
    Abstract: A transmitter comprising a power amplifier, a phase modulator, a switched DC-DC converter, all operating in dual mode, and a controller is disclosed. The power amplifier is arranged to selectively operate either in a first mode or in a second mode, wherein the first mode is a linear mode and the second mode is a non-linear mode in order to save power with least increasing cost in hardware. The transmitter is adapted to operate at different allocated bandwidths, for different radio standards while keeping minimum power consumption governed by the controller. A transceiver, a communication device, a method and a computer program are also disclosed.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: July 24, 2018
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Fenghao Mu, Bengt Lindoff
  • Patent number: 10027517
    Abstract: A measuring device serves for the detection of a simultaneous presence of at least a first signal and a second signal in a measurement signal. The measuring device contains a receiver for receiving the measurement signal as a digital measurement signal and a processor. This processor includes a transformer for transforming the digital measurement signal into a measurement signal in the frequency domain. The processor further contains a subtractor for subtracting the first sideband of the measurement signal in the frequency domain from a second sideband of the measurement signal in the frequency domain. In this context, the subtractor generates a residual signal.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: July 17, 2018
    Assignee: ROHDE SCHWARZ GMBH & CO. KG
    Inventor: Thorben Detert
  • Patent number: 10027413
    Abstract: A method implemented in a communication device, comprising generating, via a processor of the communication device, a first waveform modulation signal based on a first approximation of an input signal, generating, via the processor, a second waveform modulation signal based on a first difference between the input signal S and the first waveform modulation signal, generating, via the processor, a control signal having a sequence of control symbols with a pre-determined modulation format, performing, via the processor, time-domain multiplexing (TDM) on the first waveform modulation signal, the second waveform modulation signal, and the control signal to form a cascaded waveform modulation signal with embedded control signal (CWM-CS), modulating, via a frontend of the communication device, the CWM-CS onto a carrier, and transmitting, via the frontend, the CWM-CS over a communication link to a corresponding communication device in a network.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: July 17, 2018
    Assignee: Futurewei Technologies, Inc.
    Inventors: Xiang Liu, Huaiyu Zeng
  • Patent number: 10027515
    Abstract: A system including filter circuits, a least mean square (LMS) engine, and a gain controller. A first filter circuit includes first taps that receive first coefficients. The first filter circuit filters a digital signal to generate a first filtered signal. One of the first coefficients is constrained. The LMS engine, based on a first input signal and a LMS algorithm, generates the first coefficients. A second filter circuit includes second taps that receive second coefficients. The second filter circuit filters the first filtered signal to generate a second filtered signal. The gain controller adjusts a gain of the digital signal based on a second input signal. The second filter circuit introduces: a difference in gain between outputs of the first and second filter circuits to adjust amplitudes of the first and second input signals; and a sampling phase offset between the outputs of the first and second filter circuits.
    Type: Grant
    Filed: April 19, 2017
    Date of Patent: July 17, 2018
    Assignee: Marvell International Ltd.
    Inventor: Pantas Sutardja
  • Patent number: 10015026
    Abstract: A transmitter according to the disclosure includes: three first driver sections; three first pre-driver sections that are provided corresponding to the respective three first driver sections, and each drive corresponding one of the first driver sections on a basis of corresponding one of three first control signals that are different from one another and each including predetermined number of signals; a second pre-driver section that operates on a basis of a second control signal that includes predetermined number of signals; and a controller that controls transition of the predetermined number of signals included in the second control signal to allow number of signals to be subjected to the transition out of the plurality of signals included in the three first control signals and the plurality of signals included in the second control signal to be same between timings of the transition.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: July 3, 2018
    Assignee: Sony Corporation
    Inventor: Hisashi Owa
  • Patent number: 10002109
    Abstract: A method of correlating satellite position data with terrestrial features may include: Using a geometric snapping algorithm to correlate the satellite position data and terrestrial survey data and snap the satellite position data to the terrestrial features; determining whether the satellite position data can be snapped to unique terrestrial features; and using a hybrid space-time snapping algorithm to correlate the satellite position data and terrestrial survey data and snap the satellite position data to unique terrestrial features when the satellite position data cannot be snapped to unique terrestrial features.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: June 19, 2018
    Assignee: Freeport-McMoRan Inc.
    Inventors: Mary Amelia Walker, Robert Catron, Brian Vaughan, Hung Jung Lu
  • Patent number: 9948426
    Abstract: The present invention provides a method of transmitting broadcast signals. The method includes, encoding, by an encoder, data in plural PLPs (Physical Layer Pipes); processing, by a framing and interleaving block, the encoded data in the plural PLPs, wherein the processing the encoded data further includes: time interleaving, by a time interleaver, the encoded data in the plural PLPs, frame mapping, by a framer, the time interleaved data onto at least one signal frame, and frequency interleaving, by a frequency interleaver, data in the at least one signal frame; and waveform modulating, by a waveform generation block, the frequency interleaved data in the at least one signal frame and transmitting, by the waveform generation block, broadcast signals having the waveform modulated data.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: April 17, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Jongseob Baek, Seoyoung Back, Woosuk Ko, Sungryong Hong
  • Patent number: 9942005
    Abstract: A sequence detector is provided for detecting symbol values corresponding to a sequence of input samples obtained from a transmission channel. The sequence detector comprises a branch metric unit (BMU), a path metric unit (PMU) and a survivor memory unit. The branch metric unit calculates branch metrics for respective possible transitions between states of a trellis. The path metric unit accumulates branch metrics provided by the branch metric unit in order to establish path metrics. The survivor memory unit selects a survivor path based on the path metrics and outputs a survivor sequence of the detected symbols corresponding to the survivor path. The sequence detector is configured such that the synchronization length is different than the survivor path memory length.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: April 10, 2018
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Giovanni Cherubini, Roy D. Cideciyan, Thomas H. Toifl, Hazar Yuksel
  • Patent number: 9942000
    Abstract: A broadcast receiving apparatus and a signal processing method thereof are provided. The broadcast receiving apparatus includes a receiver configured to receive a data stream comprising a plurality of physical layer pipes (PLPs); a demodulator configured to output at least one generic packet corresponding to each of the plurality of PLPs and additional information on the at least one generic packet by demodulating the plurality of PLPs; and a signal processor configured to process the at least one generic packet based on the output additional information.
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: April 10, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Yun-kyoung Han, Suk-in Min
  • Patent number: 9941936
    Abstract: A communication device includes a pulse width modulator that is provided with an oscillator signal at a communication carrier frequency. The pulse width modulator input is an amplified reference voltage that is regulated by a feedback loop. A modulation control provides the data signal to be transmitted. The modulation control may either be provided to the amplifier mixed with the reference voltage or may be provided to the pulse width modulator. A power transistor receives the pulse width modulator output and generates a chip output signal. An external filter is connected at the chip output to filter the signal that is provided to the communication antenna and produce a carrier sinusoid with an amplitude proportional to the pulse width modulated by voltage regulation and by the modulating data input. The power source is connected to the external filter.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: April 10, 2018
    Assignee: Intel IP Corporation
    Inventors: Sathish K. Kuttan, Jean-Yves Michel
  • Patent number: 9935662
    Abstract: A front-end module configured to cancel unwanted transmit spectrum at one or more receivers comprises at least one transmitter having a power amplifier and configured to transmit signals to an antenna. The front-end module also comprises at least one receiver to receive the transmit signals, wherein the at least one receiver receives at least a portion of unwanted transmit spectrum. A directional coupler couples at least a portion of a transmit output signal from the power amplifier to provide a coupled transmit output signal to signal conditioning circuitry associated with the at least one receiver and configured to condition the coupled transmit output signal to generate a conditioned transmit signal to provide to the at least one receiver, wherein the conditioned transmit signal at least partially cancels the unwanted transmit spectrum. The signal conditioning circuitry may adjust the amplitude and phase of the coupled transmit output signal.
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: April 3, 2018
    Assignee: Qorvo US, Inc.
    Inventors: Nadim Khlat, Andrew F. Folkmann
  • Patent number: 9930757
    Abstract: A circuit (200, 300, 400, 600, 700, 800) interfacing a device (20, 30, 40, 60, 80) with a line-pair includes: a diode bridge (210) having polarity-independent input terminals coupled to the line-pair; a galvanic isolation device (230, 330) receiving a transmit signal and coupling the transmit signal to its output; a variable edge delay circuit (270, 370, 572, 574, 576) that delays rising/falling edges of the transmit signal more than falling/rising edges of the transmit signal; a voltage-controlled variable resistance element (260, 360, 460) connected across output terminals of the diode bridge; and a filter connected to a control terminal of the voltage-controlled variable resistance element. The filter includes decoupled charge and discharge paths to decouple the rise time of the transmit signal from the fall time of the transmit signal. The voltage-controlled variable resistance element couples the transmit signal to the line-pair via the diode bridge.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: March 27, 2018
    Assignee: PHILIPS LIGHTING HOLDING B.V.
    Inventor: Stefan-Cristian Rezeanu
  • Patent number: 9923551
    Abstract: The invention is a method that combines the following components: a high pass filter designed to have sufficiently small phase delay and roll-off value in transition band as well as sufficiently good attenuation; a distortion detection and reconstruction introduced by the application of the high pass filter by extraction the significant frequency components in relevant frequency band; a signal compensation that reshapes the output of the high pass filter by matching the filter's phase delay and attenuation characteristics so as to approximate low frequency component extraction that would be produced by an ideal filter (very sharp frequency transition and no delay); a time-domain detection and correction method that addresses special circumstances under which the compensation would be inaccurate to achieve real-time estimate in normal circumstances, and a time-domain correction method during and immediately after sudden changes in composite signal (spike) is detected.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: March 20, 2018
    Assignee: ROLLS-ROYCE plc
    Inventors: Lily Rachmawati, Eng Yeow Cheu, Anna Swider, Martijn De Jongh, Eivind Vinje
  • Patent number: 9924211
    Abstract: A timing calibration device for calibrating a timing relationship between a clock signal and a first signal includes: an input port, receiving the clock signal through a clock transmission path, and receiving the first signal through a first path; and a calibrator. The calibrator includes: a first sampling circuit, sampling the first signal according to the clock signal to generate a first sample result; a control circuit, determining that the first sample result is valid when the first sampling result includes a transition edge of the first signal; and a first edge adjusting circuit, adjusting one of a transition edge of the clock signal and the transition edge of the first signal when the first sample result is valid to satisfy a predetermined timing relationship.
    Type: Grant
    Filed: July 19, 2016
    Date of Patent: March 20, 2018
    Assignee: MStar Semiconductor, Inc.
    Inventor: Yao-Dong Chen
  • Patent number: 9917618
    Abstract: Aspects of methods and systems for PAPR reduction in a microwave backhaul outdoor unit are provided.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: March 13, 2018
    Assignee: MAXLINEAR, INC.
    Inventors: Stephane Laurent-Michel, Raghuraman Mariappan
  • Patent number: 9912369
    Abstract: An integrated circuit for adaptively maintaining a communications link during an idle mode is disclosed. The integrated circuit may operate in a first (active) mode and a second (idle) mode. The integrated circuit includes a transceiver circuit that establishes a communications link with an additional transceiver circuit of an external integrated circuit. The transceiver circuit may receive data packets from the additional transceiver circuit during the first mode. The integrated circuit further includes monitoring circuitry that monitors a health metric associated with maintaining the communications link between the transceiver circuit and the additional transceiver circuit during the second mode. A control circuit may generate keep-alive signals and adaptively adjusts the frequency of the keep-alive signals such that the health metric is satisfied.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: March 6, 2018
    Assignee: Altera Corporation
    Inventor: Michael James Armstrong