By Filtering (e.g., Digital) Patents (Class 375/350)
  • Patent number: 11558115
    Abstract: Methods and systems for low complexity interference cancellation in multichannel optical transmission. Local or self-iteration is performed one or more times between an expected propagation decision feedback equalizer and a soft demapper. Following local iteration, a soft decision forward error correction decoder determines bit log-likelihood ratios, which are fed back to the expected propagation decision feedback equalizer and soft demapper for further self-iteration. Global iteration involving the decoder can also be performed one or more times before a bitstream is decoded.
    Type: Grant
    Filed: July 14, 2021
    Date of Patent: January 17, 2023
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Jeebak Mitra, Mrinmoy Jana, Lutz Hans-Joachim Lampe, Jin Wang, Chuandong Li
  • Patent number: 11558881
    Abstract: According to an aspect, there is provided an apparatus for a radio receiver or transceiver of a first access node. The apparatus is configured to perform the following. Upon receiving data via at least one antenna, the apparatus performs resource mapping on the received data based on scheduling information defining currently allocated uplink time-frequency resources to isolate at least a first data set corresponding to non-allocated uplink time-frequency resources. The apparatus compares the first data set against one or more first pre-defined criteria for detecting interference. In response to detecting interference in the first data set according to said one or more first pre-defined criteria, the apparatus instructs a scheduler entity of the first access node to avoid scheduling uplink time-frequency resources affected by said interference.
    Type: Grant
    Filed: May 20, 2022
    Date of Patent: January 17, 2023
    Assignee: NOKIA SOLUTIONS AND NETWORKS OY
    Inventors: Mikko Simonen, Toni Aleksi Levanen, Lasse Harju
  • Patent number: 11552731
    Abstract: An apparatus, method and computer program is described comprising receiving data at a receiver of a transmission system; using a receiver algorithm to convert data received at the receiver into an estimate of the first coded data, the receiver algorithm having one or more trainable parameters; generating an estimate of first data bits by decoding the estimate of the first coded data, said decoding making use of an error correction code of said encoding of the first data bits; generating a refined estimate of the first coded data by encoding the estimate of the first data bits; generating a loss function based on a function of the refined estimate of the first coded data and the estimate of the first coded data; updating the trainable parameters of the receiver algorithm in order to minimise the loss function; and controlling a repetition of updating the trainable parameters by generating, for each repetition, for the same received data, a further refined estimate of the first coded data, a further loss functi
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: January 10, 2023
    Assignee: Nokia Technologies Oy
    Inventors: Sebastian Cammerer, Sebastian Dörner, Stefan Schibisch, Jakob Hoydis
  • Patent number: 11552776
    Abstract: Disclosed are systems, methods, and non-transitory computer-readable media for a hybrid physical layer that supports data communications using both Ethernet and ASA. Ethernet and ASA are communication standards that are commonly used in automotive environments; however, are not interoperable. The hybrid physical layer supports data communications using both Ethernet and ASA. For example, the hybrid physical layer may be configured into either a first mode of operation to support data communications using Ethernet or a second mode of operation to support data communications using ASA. Devices utilizing the hybrid physical layer can therefore be used with other components that utilize either communication standard.
    Type: Grant
    Filed: August 19, 2021
    Date of Patent: January 10, 2023
    Assignee: Ethernovia Inc.
    Inventors: Hossein Sedarat, Christopher Mash, Darren S. Engelkemier, Ramin Shirani, Roy T. Myers, Jr.
  • Patent number: 11539375
    Abstract: Systems and methods for direct signal down-conversion and decimation in a digital receiver. The digital receiver produces a decimated passband version of the signal without the problems associated with use of digital mixers. The digital receiver includes a passband-to-passband decimator/down-converter that implements an algorithm which takes the signal band (frequency and bandwidth or lower and upper frequencies) where a signal is present and produces a decimation rate and phase for use by a low-pass mixer-free down-conversion. The digital receiver technology may be efficiently implemented on a digital signal processor or field-programmable gate array.
    Type: Grant
    Filed: August 27, 2021
    Date of Patent: December 27, 2022
    Assignee: The Boeing Company
    Inventor: Gary A. Ray
  • Patent number: 11540279
    Abstract: A radio for determining the occupancy of a variable width channel for secondary use, the variable width channel with a bandwidth equal to an integer multiple of the bandwidth of a plurality of narrowband channels in an RF frequency band. The radio decides whether the variable width channel in the RF band is occupied by whether classifying each of the narrowband channels corresponding to the variable width channel and each of a plurality of sub-bands with bandwidths of narrowband channels but center frequencies shifted by one-half of the bandwidth of the narrowband channel and overlap with the bandwidth of the variable width channel as containing signal or noise based on measured energy levels.
    Type: Grant
    Filed: July 12, 2020
    Date of Patent: December 27, 2022
    Assignee: Meteorcomm, LLC
    Inventors: Shiva Sarrafan, Arun Naidu, Mark Davies
  • Patent number: 11533203
    Abstract: Methods, systems and devices for lattice reduction in decision feedback equalizers for orthogonal time frequency space (OTFS) modulation are described. An exemplary wireless communication method, implementable by a wireless communication receiver apparatus, includes receiving a signal comprising information bits modulated using OTFS modulation scheme. Each delay-Doppler bin in the signal is modulated using a quadrature amplitude modulation (QAM) mapping. The method also includes estimating the information bits based on an inverse of a single error covariance matrix of the signal, with the single error covariance matrix being representative of an estimation error for all delay-Doppler bins in the signal.
    Type: Grant
    Filed: August 23, 2021
    Date of Patent: December 20, 2022
    Assignee: Cohere Technologies, Inc.
    Inventors: Vamadevan Namboodiri, Ronny Hadani, James Delfeld
  • Patent number: 11502028
    Abstract: A semiconductor package is described. The semiconductor packager includes a chip stack mounted over a package substrate, a first wire disposed over the package substrate, and a molding layer surrounding the chip stack and the first wire. The first wire has an acute angle.
    Type: Grant
    Filed: February 15, 2021
    Date of Patent: November 15, 2022
    Assignee: SK hynix Inc.
    Inventors: Chae Sung Lee, Jong Hoon Kim
  • Patent number: 11412347
    Abstract: Described in this document are ways to accomplish high resolution and high dynamic range Doppler-Effect measurements for use in wireless communications and other applications such as positioning. Doppler Effect (interchangeably called Doppler shift or Doppler frequency shift) measurements have traditionally been done with purpose-built devices, such as pulse-based radars. Presented in this document are alternative ways to incorporate Doppler frequency shift measurement using modulated carrier signals with a conventional radio, without additional hardware.
    Type: Grant
    Filed: January 17, 2018
    Date of Patent: August 9, 2022
    Assignee: PhasorLab, Inc.
    Inventors: Cuneyt Demirdag, Joshua C. Park, Glen Wolverton, Devang Topiwala
  • Patent number: 11381279
    Abstract: A transceiver having a shared filter for both transmit and receive modes is disclosed. A transceiver includes a transmitter having an output coupled to a signal node, wherein the transmitter is configured to transmit signals onto the signal node during transceiver operation in a transmit mode. The transceiver also includes a receiver having an input coupled to the signal node, and configured to receive signals from the signal node during operation in the receive mode. The transceiver further includes a first filter coupled to the signal node, wherein the filter is shared by the transmitter and the receiver. The filter is coupled between the transceiver and a first terminal of a transmission line.
    Type: Grant
    Filed: November 19, 2020
    Date of Patent: July 5, 2022
    Assignee: Apple Inc.
    Inventors: Yashar Rajavi, Sohrab Emami-Neyestanak, Abbas Komijani
  • Patent number: 11356314
    Abstract: Pulse amplitude modulation (PAM) encoding for a communication bus is disclosed. In particular, various two-wire communication buses may encode bits using three-level PAM (PAM-3) or five-level PAM (PAM-5) to increase bit transmission without requiring increases to clock frequencies or adding additional pins. Avoiding increases in clock frequencies helps reduce the risk of electromagnetic interference (EMI), and avoiding use of extra pins avoids cost increases for integrated circuits (ICs).
    Type: Grant
    Filed: October 21, 2020
    Date of Patent: June 7, 2022
    Assignee: QUALCOMM Incorporated
    Inventors: Lalan Jee Mishra, Richard Dominic Wietfeldt, George Alan Wiley, Radu Pitigoi-Aron
  • Patent number: 11329848
    Abstract: A wireless communication method includes receiving, by a first wireless device during a training phase, reference tones using a first number of resource elements from a transmitter of a second wireless device, wherein the first wireless device comprises multiple receiving antennas, estimating, by the first wireless device, from the receiving the reference tones, a second order statistics of wireless channels between the multiple receiving antennas and the transmitter of the second wireless device, and performing channel estimation, during an operational phase subsequent to the training phase, using the second order statistics and reference tones received on a second number of resource elements, wherein the second number is less than the first number.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: May 10, 2022
    Assignee: Cohere Technologies, Inc.
    Inventors: Shachar Kons, Ronny Hadani, Paul Harris
  • Patent number: 11308774
    Abstract: Described herein are methods and systems of distributed acoustic sensing, such as in an urban or metropolitan area involving a dedicated and established fibre optic communications network including a data centre. In general, the disclosed method and system includes the steps of (a) selecting an optical fibre cable installation having a path extending across a selected geographical area, the optical fibre cable installation including a bundle of optical fibres and forming part of a fibre-optic communications network, (b) determining characteristics associated with the optical fibre and/or the selected optical fibre installation, (c) transmitting outgoing light in the optical fibre, (d) receiving reflected light back scattered along the optical fibre, and (e) based on the reflected light and the determined characteristics, generating an alert signal representative of an acoustic event. The disclosed method and system are applied to detect acoustic events near or within the selected geographical area.
    Type: Grant
    Filed: December 16, 2020
    Date of Patent: April 19, 2022
    Assignee: Fiber Sense Limited
    Inventor: Mark A. Englund
  • Patent number: 11303354
    Abstract: A relay station configured to orbit a celestial body and configured to receive data from a population of devices arranged at the celestial body, the relay station and the devices configured to travel with respect to one another. The relay station includes a receiver configured to receive signals from the devices, the signals including a signal that is part of the signals, the signal including signal data in data packages that are at least part of the data. The relay station also includes a signal-processing device configured to receive the signal from the receiver and extract the signal data from the signal. The signal-processing device is configured to correct the signal for a positive Doppler shift or a negative Doppler shift. The relay station also includes a transmitter configured to transmit the signal data from the signal processing device to a server arranged remotely from the relay station at the celestial body.
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: April 12, 2022
    Assignee: HIBER B.V.
    Inventor: Maarten Johannes Engelen
  • Patent number: 11289106
    Abstract: A method for decoding an encoded audio bitstream is disclosed. The method includes receiving the encoded audio bitstream and decoding the audio data to generate a decoded lowband audio signal. The method further includes extracting high frequency reconstruction metadata and filtering the decoded lowband audio signal with an analysis filterbank to generate a filtered lowband audio signal. The method also includes extracting a flag indicating whether either spectral translation or harmonic transposition is to be performed on the audio data and regenerating a highband portion of the audio signal using the filtered lowband audio signal and the high frequency reconstruction metadata in accordance with the flag.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: March 29, 2022
    Assignee: Dolby International AB
    Inventors: Kristofer Kjoerling, Lars Villemoes, Heiko Purnhagen, Per Ekstrand
  • Patent number: 11277238
    Abstract: Provided are phase tracking reference signal (PTRS) configuration, determination and information feedback methods and devices. The PTRS configuration method includes: transmitting, by a first node, the control information to a second node, where the control information is used for indicating a configuration parameter of the PTRS to the second node and the PTRS is transmitted by the first node or the second node. The second node determines the configuration parameter of the PTRS through the control information transmitted by the first node and/or an agreed implicit rule. A third node transmits control information to a fourth node, where the control information is used for feeding received power or quality information of the PTRS back to the fourth node.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: March 15, 2022
    Assignee: XI'AN ZHONGXING NEW SOFTWARE CO., LTD.
    Inventors: Yijian Chen, Zhaohua Lu, Hao Wu, Bo Gao, Nan Zhang
  • Patent number: 11277871
    Abstract: Physical layer structures and access schemes for use in such networks are described and in particular initial access channel (IACH) structures are proposed. A spectrum efficient downlink (DL) IACH design supports different types of User Equipment (UE) capabilities and different system bandwidths. An IACH includes the synchronization channel (SCH) and broadcast-control channel (BCH). A non-uniform SCH for all system bandwidths is provided, as well as scalable bandwidth BCH depending on system bandwidth. An initial access procedure is provided, as well as an access procedure.
    Type: Grant
    Filed: September 23, 2020
    Date of Patent: March 15, 2022
    Assignee: Apple Inc.
    Inventors: Jianglei Ma, Hua Xu, Ming Jia, Sarah Boumendil, Evelyne Le Strat, Hang Zhang, Peiying Zhu, Wen Tong
  • Patent number: 11271658
    Abstract: A coherent receiver performing coherent detection on polarization multiplex light into which first polarization light and second polarization light are multiplexed, and splitting the polarization multiplex light into the first polarization light and the second polarization light, an adaptive equalizer compensating the waveform distortion of a signal superimposed onto the first polarization light by using a first FIR filter, compensating the waveform distortion of a signal superimposed onto the second polarization light by using a second FIR filter, and by decoding each of the signals whose waveform distortion has been compensated, generating their respective decoded data, an error ratio calculator calculating the bit error ratio of each decoded data generated by the adaptive equalizer, a margin calculator calculating a margin from the bit error ratio of an error correction limit in each bit error ratio calculated by the error ratio calculator, and a tap number controller setting up the numbers of taps of the
    Type: Grant
    Filed: January 12, 2021
    Date of Patent: March 8, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masashi Binkai, Tsuyoshi Yoshida, Keisuke Matsuda
  • Patent number: 11271598
    Abstract: An apparatus that implements DPD in a manner that can address OOB instability issues, PE instability issues, or both, is disclosed. The apparatus includes an actuator circuit configured to use a model of a power amplifier (PA) to apply a predistortion to at least a portion of an input signal, and an error correction circuit configured to generate an error signal indicative of a deviation of the output of the actuator circuit from the target output, e.g., in terms of OOB or PE. The apparatus also includes an adaptation circuit configured to update the model based on the error signal. By using such an error in adapting the model used for the DPD, undesirable effects of performing DPD, such as creation or amplification of OOB frequency components, or increasing amplitude of some samples, may be reduced or eliminated.
    Type: Grant
    Filed: December 9, 2020
    Date of Patent: March 8, 2022
    Assignee: ANALOG DEVICES INTERNATIONAL UNLIMITED COMPANY
    Inventors: Patrick Pratt, David Jennings
  • Patent number: 11269057
    Abstract: A system for radar object simulation is provided. The system comprises a filter unit with a plurality of filter paths, a processing unit and a communication interface. In this context, each of the plurality of filter paths comprises a number of coefficients corresponding to the distance of a simulated object. In addition, the processing unit is configured to select a filter path of the plurality of filter paths based on the number of coefficients.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: March 8, 2022
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventor: Oomke Weikert
  • Patent number: 11223911
    Abstract: The present invention is in the field of an intra ear canal hearing aid, a pair of said hearing aids and use of said hearing aids. Such a hearing aid is designed to improve or support hearing. It typically relates to an electroacoustic device that is capable of transforming sound, thereby reducing noise and typically amplifying certain parts of the audio frequency spectrum. In addition such as hearing aid may improve directional perception of sound.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: January 11, 2022
    Assignees: AXIGN B.V., NOVIOSOUND B.V.
    Inventors: Jeroen Langevoort, Arthur Perry Berkhoff, Arnoldus Johannes Maria Baltussen, Reinier van 'T Hooft, David George Bradford
  • Patent number: 11218225
    Abstract: The present invention is directed to communication method and techniques. In a specific embodiment, the present invention provides a receiver that interleaves data signal n-ways for n slices. Each of the n slices includes feedforward equalizer and decision feedback equalizers that are coupled to other slices. Each of the n slices also includes an analog-to-digital converter section that includes data and error slicers. There are other embodiments as well.
    Type: Grant
    Filed: December 7, 2020
    Date of Patent: January 4, 2022
    Assignee: MARVELL ASIA PTE, LTD.
    Inventor: Basel Alnabulsi
  • Patent number: 11177619
    Abstract: A transmitter is configured to generate a signal carrying data. A signal splitter is configured to generate multiple copies of the signal. A slip ring includes first and second portions, one configured to rotate relative to the other. The slip ring also includes a first interface associated with the first portion and configured to receive the multiple copies of the signal. The slip ring further includes a second interface associated with the second portion. In addition, the slip ring includes multiple electrical pathways electrically coupling the first and second interfaces, where at least some of the electrical pathways are configured to transport the multiple copies of the signal from the first interface to the second interface. A signal combiner is configured to receive the multiple copies of the signal from the second interface and to generate a recovered signal. A receiver is configured to recover the data from the recovered signal.
    Type: Grant
    Filed: October 23, 2019
    Date of Patent: November 16, 2021
    Assignee: Raytheon Company
    Inventors: William L. Cram, Alan G. Stuessy
  • Patent number: 11172345
    Abstract: The present disclosure relates to a method for transmitting at least one data packet between a first communication subscriber of a communication arrangement and at least one second communication subscriber of the communication arrangement, wherein the at least one data packet is transmitted from the first communication subscriber to the second communication subscriber at least partially via a bidirectional direct connection set up between a communication module of the first communication subscriber and a communication module of the at least one second communication subscriber, wherein the first communication subscriber and/or the at least one second communication subscriber is a vehicle, and wherein the at least one second communication subscriber feeds back a receipt for respective data of the at least one data packet to the first communication subscriber.
    Type: Grant
    Filed: July 10, 2017
    Date of Patent: November 9, 2021
    Assignee: Audi AG
    Inventor: Jürgen Spehl
  • Patent number: 11082135
    Abstract: The present disclosure relates to an apparatus and method of processing a digital signal, wherein an input signal is transformed into the frequency domain by applying a fast Fourier transformation (FFT) processing to obtain a transformed input signal. Positive and negative frequency components of the transformed input signal are separated and respective ones of the separated positive and negative frequency components are separately processed by respective digital filtering to obtain filtered frequency components. The filtered frequency components are combined in the frequency domain using a down-sampling operation for down-sampling the filtered frequency components from an input number of samples per symbol to a different output number of samples per symbol, and the combined output components are converted into the time domain by applying an IFFT processing.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: August 3, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Michael Zarubinsky, Doron Cohen, Qingsong Xue, Dori Gidron, Ling Liu, Changsong Xie, Liangchuan Li, Ming Chen
  • Patent number: 11069331
    Abstract: A noise reduction filter for data signals is implemented using two orthogonal coordinates comprising intensity and differential intensity values generated from sampling and sorting the data signals. A weighting function is used to amplify or reduce different portions of a data set distribution generated using the intensity and differential intensity values. The weighting function may also include scalar constants to further enhance the capability of the noise reduction filter. The noise reduction filter can be used to reduce the noise components or increase the useful signal components of a noisy data signal, thereby increasing the signal-to-noise ratio, and also increasing spectral resolution. The noise reduction filter can also be used in special cases where the intensity and frequency spectra of the noisy data signal are overlapping. The noise reduction filter may be used in various applications including spectroscopy and image processing, among others.
    Type: Grant
    Filed: February 14, 2019
    Date of Patent: July 20, 2021
    Assignee: PerkinElmer Health Sciences, Inc.
    Inventor: V. Sergey Rakov
  • Patent number: 11038736
    Abstract: A method by which a first network node cancels a self-interference signal when operating in a full duplex radio (FDR) mode in a wireless network can comprise the steps of: cancelling a self-interference signal on the basis of frequency synchronization estimation of the self-interference signal when frequencies of a reception signal received from a second network node and the self-interference signal are asynchronous; and estimating frequency synchronization of the reception signal by using a residual signal according to the cancellation of the self-interference signal, and detecting the reception signal on the basis of the frequency synchronization estimation of the reception signal.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: June 15, 2021
    Assignees: LG ELECTRONICS INC., INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
    Inventors: Kwangseok Noh, Daesik Hong, Haesoon Lee, Jaeyeong Choi, Dongkyu Kim
  • Patent number: 11025347
    Abstract: Systems, methods, and devices are provided for compensating for distortion of a contactless communication channel. The electronic device may include a radio frequency system that itself includes antenna to transmit and receive data using near-field communication (NFC) and an NFC signal processing circuitry. The NFC signal processing circuitry may receive an NFC signal via a communication channel formed between the electronic device and another electronic device and may determine a baseband reference waveform associated with the electromagnetic NFC signal and may determine an error between a portion of the electromagnetic NFC signal and the baseband reference waveform. Furthermore, the NFC signal processing circuitry may determine whether the error is outside of an acceptable error threshold range and, in response to the error being outside of the acceptable error threshold range, train a filter response of the NFC signal processing circuitry to estimate the communication channel.
    Type: Grant
    Filed: July 6, 2020
    Date of Patent: June 1, 2021
    Assignee: Apple Inc.
    Inventors: Xinping Zeng, Vusthla Sunil Reddy, Peter M. Agboh
  • Patent number: 11018905
    Abstract: Signal cancellation is implemented by way of a non-linear filter model feeding to an FIR channel. Parameters defining each element are iteratively established, first by initially estimating the FIR channel then jointly estimating the two elements.
    Type: Grant
    Filed: October 25, 2019
    Date of Patent: May 25, 2021
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Seifallah Jardak
  • Patent number: 11005493
    Abstract: A digital-to-analog conversion circuit (60) for converting a digital input sequence to an analog representation is disclosed. It comprises a first DAC, (100) wherein the first DAC (100) is of a capacitive voltage division type having a capacitive load (110). Furthermore, it comprises a second DAC (120) having a resistive load (130). An output (104) of the first DAC (100) and an output (124) of the second DAC (120) are connected, such that said capacitive load (110) and said resistive load (130) are connected in parallel.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: May 11, 2021
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Henrik Fredriksson, Martin Anderson, Henrik Sjöland
  • Patent number: 10979208
    Abstract: A Digital Time Processing (DTP) disclosed herein is contributing methods, systems and circuits for filtering out a phase noise of a timing referencing signal, producing a timing implementing signal from a free running local clock and time processing over time sensitive networks (TP TSN) enabling improved utilization of IEEE 1588 PTP and better accuracy of time distribution.
    Type: Grant
    Filed: May 25, 2020
    Date of Patent: April 13, 2021
    Inventor: John W Bogdan
  • Patent number: 10979262
    Abstract: IQ mismatch correction for analog chain IQ mismatch impairments is based on a two-filter architecture. In either RX or TX, an IQmc mismatch corrector (digital chain) filters I and Q digital signals, and includes an I-path to receive the I signal, and a Q-path to receive the Q signal, and is configured with two filters: an in-path filter to filter either the I signal or the Q signal received in the same path; and a cross-path filter to filter either the I signal or the Q signal received in the other path. The IQmc mismatch corrector can include: an I-path delay element to provide a delay to the I signal corresponding to a delay through either the in-path filter or the cross-path filter; and a Q-path delay element to provide a delay to the Q signal corresponding to a delay through either the in-path filter or the cross-path filter.
    Type: Grant
    Filed: June 16, 2020
    Date of Patent: April 13, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Jawaharlal Tangudu, Sthanunathan Ramakrishnan, Jaiganesh Balakrishnan
  • Patent number: 10972315
    Abstract: A signal estimator for an OFDM radio receiver is configured to generate a signal power estimate for a reference signal received on a subcarrier from a plurality of OFDM subcarriers. The signal estimator generates a first channel estimate as a first function of a first set of one or more unfiltered reference-signal channel estimates, where the first set includes an unfiltered reference-signal channel estimate. It generates a second channel estimate as a second function of a second set of one or more unfiltered reference-signal channel estimates, where the second set has no unfiltered reference-signal channel estimate in common with the first set. The signal estimator then generates the signal power estimate by multiplying the first channel estimate with the second channel estimate, such that the generated signal power estimate does not increase with the absolute square of any of the unfiltered reference-signal channel estimates in the first and second sets.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: April 6, 2021
    Assignee: Nordic Semiconductor ASA
    Inventor: Mauri Nissilä
  • Patent number: 10972318
    Abstract: A data stream processing device includes a plurality of data providing units, a plurality of processing units, and control circuitry. The data providing units are configured to output data values received via a plurality of data inputs, respectively. The processing units are configured to generate data outputs based on the data values, respectively. The control circuitry includes a mode selection input and is configured to simultaneously provide data values of different data streams to the data inputs of the data providing units, respectively, in response to the mode selection input receiving a signal indicating a first mode, and simultaneously provide a plurality of successive groups of data values of one of the data streams to the data inputs of the data providing units, respectively, in response to the mode selection input not receiving the signal indicating the first mode.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: April 6, 2021
    Assignee: HUGHES NETWORK SYSTEMS, LLC
    Inventor: Tony Huang
  • Patent number: 10965438
    Abstract: A signal receiving circuit, a memory storage device and a signal receiving method are provided. The signal receiving circuit includes an equalizer module, a clock and data recovery (CDR) circuit and a controller. The equalizer module is configured to receive a first signal and compensate the first signal to generate a second signal. The CDR circuit is configured to perform a phase locking on the second signal. The controller is configured to open or close a signal pattern filter of the CDR circuit according to the second signal, wherein the signal pattern filter is configured to filter a signal having a specific pattern in the second signal.
    Type: Grant
    Filed: February 3, 2020
    Date of Patent: March 30, 2021
    Assignee: PHISON ELECTRONICS CORP.
    Inventors: Shih-Yang Sun, Sheng-Wen Chen, Yen-Po Lin, Bo-Jing Lin, Po-Min Cheng
  • Patent number: 10950102
    Abstract: Described herein are methods and systems of distributed acoustic sensing, such as in an urban or metropolitan area involving a dedicated and established fibre optic communications network including a data centre. In general, the disclosed method and system includes the steps of (a) selecting an optical fibre cable installation having a path extending across a selected geographical area, the optical fibre cable installation including a bundle of optical fibres and forming part of a fibre-optic communications network, (b) determining characteristics associated with the optical fibre and/or the selected optical fibre installation, (c) transmitting outgoing light in the optical fibre, (d) receiving reflected light back scattered along the optical fibre, and (e) based on the reflected light and the determined characteristics, generating an alert signal representative of an acoustic event. The disclosed method and system are thereby configured to detect acoustic events near or within the selected geographical area.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: March 16, 2021
    Assignee: Fiber Sense Pty Ltd
    Inventor: Mark A. Englund
  • Patent number: 10909822
    Abstract: Described herein are methods and systems of distributed acoustic sensing, such as in an urban or metropolitan area involving a dedicated and established fibre optic communications network including a data centre. In general, the disclosed method and system includes the steps of (a) selecting an optical fibre cable installation having a path extending across a selected geographical area, the optical fibre cable installation including a bundle of optical fibres and forming part of a fibre-optic communications network, (b) determining characteristics associated with the optical fibre and/or the selected optical fibre installation, (c) transmitting outgoing light in the optical fibre, (d) receiving reflected light back scattered along the optical fibre, and (e) based on the reflected light and the determined characteristics, generating an alert signal representative of an acoustic event. The disclosed method and system are thereby configured to detect acoustic events near or within the selected geographical area.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: February 2, 2021
    Assignee: Fiber Sense Pty Ltd
    Inventor: Mark A. Englund
  • Patent number: 10911052
    Abstract: A system for retiming a multi-level signal that forms an eye diagram when plotted, such as a PAM4 signal that includes an equalizer configured to create an equalized signal and a first amplifier configured to amplify the equalized signal, responsive to a first amplifier control signal, to create a first amplified signal, and a second amplifier configured to amplify the equalized signal, responsive to a second amplifier control signal, to create a second amplified signal. An eye monitor processes the equalized signal, the first amplified signal, and the second amplified signal to create a first retiming clock phase signal and a second retiming clock phase signal, which control sampling times for flip-flops. One or more delays and one or more emphasis modules are configured to delay and introduce emphasis into an output from the flip-flops, the resulting signals are combined in a summing junction to create the retimed signal.
    Type: Grant
    Filed: May 23, 2019
    Date of Patent: February 2, 2021
    Assignee: MACOM Technology Solutions Holdings, Inc.
    Inventors: Bengt Littmann, George L. Barrier, IV, Atul Gupta
  • Patent number: 10911054
    Abstract: A digital-to-time converter (DTC) assisted all digital phase locked loop (ADPLL) circuit is disclosed, which comprises: a DTC error compensator arranged to receive a phase offset signal being a processed output from a time-to-digital converter (TDC) circuit, the phase offset signal includes a DTC error corresponding to a phase difference between a reference clock signal processed by a DTC circuit and a feedback clock signal derived from an output signal of the ADPLL circuit. The compensator is arranged to process the phase offset signal for generating a digital signal representative of the DTC error, which is provided as an output signal. Also, the output signal is arranged to be subtracted from the phase offset signal to obtain a phase rectified signal of the phase offset signal.
    Type: Grant
    Filed: June 19, 2020
    Date of Patent: February 2, 2021
    Assignee: Huawei International Pte. Ltd.
    Inventors: Theng Tee Yeo, Xuesong Chen, Rui Yu, Liu Supeng, Chao Yuan
  • Patent number: 10903841
    Abstract: Described are apparatus and methods for high frequency clock generation. A circuit includes a phase frequency detector (PFD) which outputs differential error clocks based on comparison of differential reference clocks and differential feedback clocks, which are at a first frequency. A controlled oscillator (CO) connected to the PFD, which adjusts a frequency of the CO based on the differential error clocks to generate differential clocks at a second frequency, which is a multiple of the first frequency. A quadrature clock generator connected to the CO, which generates differential quadrature clocks at the second frequency from the differential clocks, where the differential feedback clocks are generated from the differential clocks and one pair of the differential quadrature clocks. A frequency doubler which doubles each pair of the differential quadrature clocks and outputs fully differential and balanced clocks at a third frequency for distribution, which is a multiple of the second frequency.
    Type: Grant
    Filed: April 3, 2020
    Date of Patent: January 26, 2021
    Assignee: Ciena Corporation
    Inventors: Mahdi Parvizi, Sadok Aouini, Naim Ben-Hamida, Yuriy Greshishchev, Douglas Stuart McPherson, Robert Gibbins, Anna Sakharova
  • Patent number: 10903911
    Abstract: Embodiments of this disclosure provide an apparatus and method for estimating polarization skew. The method includes: acquiring a plurality of coefficients of an adaptive equalizer of a receiving device; the plurality of coefficients of the adaptive equalizer include at least polarization skew of a transmitting device and polarization skew of the receiving device; and calculating the polarization skew of the transmitting device and the polarization skew of the receiving device according to the plurality of coefficients of the adaptive equalizer.
    Type: Grant
    Filed: December 30, 2019
    Date of Patent: January 26, 2021
    Assignee: FUJITSU LIMITED
    Inventors: Yangyang Fan, Zhenning Tao
  • Patent number: 10868572
    Abstract: A baseband processing unit includes a baseband processor configured to receive a plurality of component carriers of a radio access technology wireless service, and a delta-sigma digitization interface configured to digitize at least one carrier signal of the plurality of component carriers into a digitized bit stream, for transport over a transport medium, by (i) oversampling the at least one carrier signal, (ii) quantizing the oversampled carrier signal into the digitized bit stream using two or fewer quantization bits.
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: December 15, 2020
    Assignee: Cable Television Laboratories, Inc
    Inventors: Jing Wang, Luis Alberto Campos, Zhensheng Jia, Curtis Dean Knittle
  • Patent number: 10855242
    Abstract: An equalizer system includes at least one equalizer configured to equalize an input signal to generate an equalized input signal; a limiting amplifier coupled to the at least one equalizer, and configured to amplify the equalized input signal to a saturated level to generate an output signal; and a control circuit coupled to the at least one equalizer and the limiting amplifier, and configured to generate at least one control signal to the at least one equalizer according to the equalized input signal to adjust a peak gain of the at least one equalizer, wherein the peak gain of the at least one equalizer is at a Nyquist frequency.
    Type: Grant
    Filed: July 12, 2019
    Date of Patent: December 1, 2020
    Assignee: Rafael Microelectronics, Inc.
    Inventors: Meng-Ping Kan, Hao-Yun Tang, Chia-Kai Chang
  • Patent number: 10826730
    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: November 3, 2020
    Assignee: REALTEK SEMICONDUCTOR CORP.
    Inventors: Yao-Chia Liu, Bo-Yu Chen
  • Patent number: 10742302
    Abstract: A wireless communication device for transceiving signals by using carrier aggregation is provided. The wireless communication device includes a first antenna configured to transmit a first signal to an outside of the wireless communication device or receive a second signal from the outside; a first transmitter connected to the first antenna via a first node and configured to generate the first signal by combining plural transmitting carrier signals received over a plural transmitting carriers; and a first receiver connected to the first antenna via the first node and configured to divide the second signal into a plural receiving carrier signals received over a plural receiving carriers. The first receiver includes a first receiving amplifier commonly connected to a plural carrier receivers configured to amplify the second signal received from the first antenna and to divide the receiving carrier signals, respectively.
    Type: Grant
    Filed: April 4, 2019
    Date of Patent: August 11, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chia-Hsin Wu, Thomas Byunghak Cho, Tae-wan Kim, Joung-hyun Yim, In-young Choi
  • Patent number: 10743203
    Abstract: Certain aspects of the present disclosure relate to methods and apparatus relating to minimizing interference by controlling beam width of a wireless device. In certain aspects, a method of minimizing interference by controlling beam width of a wireless device, such as a user equipment (UE), includes configuring antenna elements of the UE to communicate in a serving cell using a first beam, monitoring a channel quality metric in the serving cell, and re-configuring the antenna elements of the UE to perform mobility measurements of one or more neighboring cells using a second beam broader than the first beam if the metric falls below a threshold value.
    Type: Grant
    Filed: April 11, 2018
    Date of Patent: August 11, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Sameh Guirguis, Kausik Ray Chaudhuri, Ming Yang, Atanu Halder
  • Patent number: 10725682
    Abstract: A memory module includes a plurality of semiconductor memory devices associated with a same module board. The plurality of semiconductor memory devices configured to simultaneously perform a training operation, the plurality of semiconductor memory devices including a reception interface circuit configured to perform the training operation to search for selected equalization coefficients of an equalizer based on a training pattern from a memory controller, and transmit a training information signal to the memory controller in a training mode in response to a training command from the memory controller, the training information signal including the selected equalization coefficients.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: July 28, 2020
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Wang-Soo Kim, Jung-Hwan Choi, Ki-Duk Park, Yoo-Chang Sung, Jin-Sung Youn, Chang-Kyo Lee, Ju-Ho Jeon, Jin-Seok Heo
  • Patent number: 10727880
    Abstract: Otherwise incompatible crest factor reduction (CFR) and cable tilt compensation can be used together, such as in a cable television or other cable communication system having a frequency-dependent signal loss at higher frequencies. The CFR can be used to limit or reduce peaks of signals provided to a power amplifier, while additional tilt reference and tilt equalizer circuits are included to address deleterious peak regrowth effects that may otherwise arise by using conventional CFR together with cable tilt compensation.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: July 28, 2020
    Assignee: ANALOG DEVICES INTERNATIONAL UNLIMITED COMPANY
    Inventors: Patrick Pratt, David Jennings
  • Patent number: 10720936
    Abstract: A receiver having analog-to-digital converters (ADC) is disclosed. The ADCs may be reconfigured based on the data rate of the receiver. For example, more portions of each time-interleaved ADC may be enabled to support a higher data rate of the receiver and less portions of the ADCs may be used to support a lower data rate of the receiver.
    Type: Grant
    Filed: July 22, 2019
    Date of Patent: July 21, 2020
    Assignee: eTopus Technology Inc.
    Inventor: Danfeng Xu
  • Patent number: 10720999
    Abstract: A method and apparatus of a device that determines transmit and receive skew times between pairs of lanes of an electrical interface of a network element is described. In an exemplary embodiment, the device couple an optical loopback to transmit and receive interfaces of an optical interface, the optical loopback capable of transporting a first optical signal with a plurality of polarization and quadrature combinations. In addition, the device determines the receive skew time by transmitting a second optical signal on the optical loopback with one of the plurality of polarization and quadrature combinations. Furthermore, the device determines the transmit skew time by, tuning transmission delays on the transmit interface for a third optical signal with components corresponding to a pair of the plurality of polarization and quadrature combinations such that the third optical signal is recoverable on the receive interface.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: July 21, 2020
    Assignee: Arista Networks, Inc.
    Inventor: Andrew Ahern Tamoney, Jr.