Adaptive Patents (Class 375/232)
  • Patent number: 10944542
    Abstract: A method for recovering a clock signal from a data signal by using a clock recovery module is described. At least one bit count of the data signal is received. At least one edge timing of the data signal is received. At least one cost function is formed that comprises the at least one bit count of the data signal and the at least one edge timing of the data signal. The at least one cost function is minimized with respect to at least one of a clock edge timing and a bit period. Further, a clock recovery module is described.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: March 9, 2021
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Bernhard Nitsch, Adrian Ispas
  • Patent number: 10939205
    Abstract: For canceling acoustic echoing, a processor receives audio signals comprising a speaker output and an ambient input. The processor further calculates separated output signals from mixed signals using a separating transfer function. The processor calculates a criterion function based on the separated output signals. In addition, the processor calculates an acoustic echo transfer function based on maximizing the a criterion function. The processor separates a source signal from the audio signal using the acoustic echo transfer function.
    Type: Grant
    Filed: April 19, 2019
    Date of Patent: March 2, 2021
    Assignee: Utah State University
    Inventors: Todd K. Moon, Jacob H. Gunther
  • Patent number: 10938400
    Abstract: A broadband digitizer for an applied broadband analog input signal SA(t). The digitizer includes a low frequency analog-to-digital converter (LF ADC) channel and a high frequency analog-to-digital converter (HF ADC) channel, an input splitter coupled to respective inputs to the LF ADC channel HF ADC channels, a frequency divider, and a combining unit. Low frequency portions of SA(t) are digitized to digital signal SDLF[n] in the LF ADC channel and high frequency portions of SA(t) are digitized to digital signal SDHF[n] in the HF ADC channel. The combining unit combines the digital signals SDLF[n] and SDHF[n] to form distortion-reduced SD[n], corresponding to SA(t). Front ends of the LF ADC channel and HF ADC channel reduce level-caused distortions, and the combining unit reduces ADC frequency-caused, time-position-caused, and interpolation-caused distortions.
    Type: Grant
    Filed: July 20, 2020
    Date of Patent: March 2, 2021
    Assignee: GUZIK TECHNICAL ENTERPRISES
    Inventors: Anatoli B. Stein, Valeriy Serebryanskiy, Vladislav Anatolievich Klimov, Sergey Konshin
  • Patent number: 10936527
    Abstract: Embodiments include expansion cards that provide a specialized capability, such as networking, when coupled to an Information Handling System (IHS). The expansion card embodiments include a printed circuit board (PCB) of a first width and a heat sink located on a top surface of the PCB. The expansion cards also include pins located on a distal end of the PCB, where the pins are received by a connector of the IHS. Embodiments include a button operable for ejecting a latch of the expansion card from a stored position in response to pressing the button. When ejected, the latch remains within the first width of the PCB, thus supporting high-density configurations of expansion cards. The ejected latch is further operable for an administrator to easily pull the expansion card from the IHS. Expansion card embodiments may also include vents that provide pathways for ventilating heated air away from the heat sink.
    Type: Grant
    Filed: March 6, 2020
    Date of Patent: March 2, 2021
    Assignee: Dell Products, L.P.
    Inventors: Yuxin Chen, Weidong Zuo, Qingqiang Guo, Gemma Chen, Chen Zhao, Haifang Zhai
  • Patent number: 10932273
    Abstract: Facilitation of communication of radio resource quality to a mobile application is provided. In one example, a method comprises: determining, by a device coupled to a processor, a peak-to-average loading ratio of a loading of a radio of a base station device and a mobility factor of the radio, wherein the loading relates to an amount of data being handled by the radio; and determining, by the device, class information for the radio of the base station device, wherein the class information comprises a value indicative of the peak-to-average loading ratio and the mobility factor of the radio, wherein the class information is correlatable to a bit rate at which a mobile device is to execute an application of a mobile device, and wherein the radio is communicatively coupled to the mobile device.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: February 23, 2021
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: Sheldon Meredith, William Cottrill, Peter Hardie
  • Patent number: 10917149
    Abstract: Embodiments of the present application provide a parameter indication method and parameter determining method, a receive device, and a transmit device. The parameter indication method includes: generating indication information for each of a plurality of antenna panels, where the indication information is used to indicate an adjustment parameter of the antenna panel, and the adjustment parameter includes at least one of an amplitude adjustment parameter and a phase adjustment parameter; and sending the indication information. The embodiments of the present application further provide a parameter determining method, a receive device, and a transmit device. In the technical solutions provided in the embodiments of the present application, adjustment parameters of the plurality of antenna panels are fed back to adjust the plurality of antenna panels, so that a precoding vector constructed based on the plurality of antenna panels is more accurate.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: February 9, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Wei Han, Lu Wu, Huangping Jin
  • Patent number: 10916255
    Abstract: An input audio signal comprises a plurality of input audio channels. A KLT-based pre-processor transforms the plurality of input audio channels into a plurality of eigenchannels and provides metadata associated with the plurality of eigenchannels. Each eigenchannel is associated with an eigenvalue and an eigenvector. The metadata allows reconstructing the plurality of input audio channels on the basis of the plurality of eigenchannels. A selector selects a subset of the plurality of eigenvectors corresponding to a plurality of selected eigenchannels on the basis of a geometric mean of the eigenvalues. An eigenchannel encoder encodes the plurality of selected eigenchannels. A metadata encoder encodes the metadata.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: February 9, 2021
    Assignee: Huawei Technologies Duesseldorf GmbH
    Inventors: Panji Setiawan, Milos Markovic
  • Patent number: 10886991
    Abstract: Facilitating sparsity adaptive feedback in the delay doppler domain in advanced networks (e.g., 4G, 5G, 6G, and beyond) is provided herein. Operations of a method can comprise determining, by a first device comprising a processor, a channel covariance matrix in a time-frequency domain based on a channel estimation associated with reference signals received from a second device. The method also can comprise decomposing, by the first device, the channel covariance matrix into a group of component matrices. Further, the method can comprise transforming, by the first device, respective matrices of the group of component matrices into respective covariance matrices in a delay doppler domain. The method also can comprise determining, by the first device, channel state information feedback in the delay doppler domain.
    Type: Grant
    Filed: May 22, 2019
    Date of Patent: January 5, 2021
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Salam Akoum, Xiaoyi Wang, Ralf Bendlin
  • Patent number: 10880131
    Abstract: An integrated circuit equalizes a data signal expressed as a series of symbols. The symbols form data patterns with different frequency components. By considering these patterns, the integrated circuit can experiment with equalization settings specific to a subset of the frequency components, thereby finding an equalization control setting that optimizes equalization. Optimization can be accomplished by setting the equalizer to maximize symbol amplitude.
    Type: Grant
    Filed: February 14, 2020
    Date of Patent: December 29, 2020
    Assignee: Rambus Inc.
    Inventor: Ramin Farjad-Rad
  • Patent number: 10880130
    Abstract: An illustrative short, high-rate communications link includes a serializer that provides a signal having a symbol rate of at least 10 GHz; and a deserializer that receives the signal via a printed circuit board (“PCB”) trace coupled to the serializer with a first impedance mismatch and coupled to the deserializer with a second impedance mismatch. At least one of the serializer and deserializer includes an equalizer that attenuates a frequency component of the signal at half of the symbol rate relative to a frequency component of the signal at one third of the symbol rate. Though such attenuation may reduce signal-to-noise ratio, an improved communications performance may nevertheless be achieved by suppression of signal reflections.
    Type: Grant
    Filed: March 30, 2020
    Date of Patent: December 29, 2020
    Assignee: CREDO TECHNOLOGY GROUP LIMITED
    Inventors: Yasuo Hidaka, Junqing (Phil) Sun
  • Patent number: 10869193
    Abstract: A system and method for establishing secured wireless communications between electromagnetic communication devices.
    Type: Grant
    Filed: April 15, 2019
    Date of Patent: December 15, 2020
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Joseph Kampeas, Ofer Givati
  • Patent number: 10862715
    Abstract: An equalizer includes: a channel estimator configured to generate a set of time-domain channel coefficients based on a receive signal; a frequency-domain transformer configured to generate a set of frequency-domain channel coefficients based on a frequency transform of the set of time-domain channel coefficients; an equalizer coefficient generator configured to generate a set of frequency-domain equalizer coefficients based on the set of frequency-domain channel coefficients; a time-domain transformer configured to generate a set of time-domain equalizer coefficients based on a time transform of the set of frequency-domain equalizer coefficients; and a filter configured to filter the receive signal based on a filter function that is based on the set of time-domain equalizer coefficients.
    Type: Grant
    Filed: November 9, 2016
    Date of Patent: December 8, 2020
    Assignee: Apple Inc.
    Inventors: Thomas Esch, Mihail Petrov, Tobias Scholand, Michael Speth, Norbert Neurohr
  • Patent number: 10852026
    Abstract: The present environmental condition controller and method provide for controlling an environmental condition in an area of a building. For doing so, a communication interface receives an environmental condition target value (xref), and an environmental condition measured value (x). A processing unit calculates an environmental condition adjustment value (yn) with a recursive function based on the environmental condition measured value (x), the environmental condition target value (xref) and an adaptive proportionality value (k). The processing unit also generates and transmits a command based on the environmental condition adjustment value (yn). The processing unit further stores in a memory the environmental condition adjustment value (yn) as a previously calculated environmental condition adjustment value (yn?1). Specific steps of the method are executed recursively. The present method may further be performed by a computer program product.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: December 1, 2020
    Assignee: DISTECH CONTROLS INC.
    Inventor: Dominic Gagnon
  • Patent number: 10826615
    Abstract: An optical transmission method (10) comprising steps of receiving (12) a communication signal comprising symbols for transmission. The method comprises performing (16) linear amplitude modulation of an optical carrier with the communication signal to generate an amplitude modulated optical carrier. The method comprises performing low-pass filtering (14) to reduce a bandwidth of the symbols to less than a Nyquist bandwidth of the symbols. The method comprises transmitting (18) the amplitude modulated optical carrier. The method further comprises receiving (20) the amplitude modulated optical carrier following transmission and performing direct detection of the received amplitude modulated optical carrier to generate a received electrical signal; and determining (22) received symbols from the received electrical signal using an indication of a nonlinear impulse response of the direct detection.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: November 3, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Fabio Cavaliere, Antonio Malacarne, Tommaso Foggi, Francesco Fresi, Gianluca Meloni, Luca Poti
  • Patent number: 10812298
    Abstract: Pre-charging two or more sets of nodes to set a differential output of a multi-input summation latch connected to the two or more sets of nodes in a pre-charged state, the two or more sets of nodes comprising a set of data signal nodes and a set of DFE correction nodes, in response to a sampling clock, generating a differential data voltage and an aggregate differential DFE correction signal, and generating a data decision by driving the differential output of the multi-input summation latch into one of two possible output states according to a summation of the differential data voltage signal and the aggregate differential DFE correction signal and subsequently holding the data decision by holding the differential output of the multi-input summation latch in a latched state for a duration determined by the sampling clock.
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: October 20, 2020
    Assignee: KANDOU LABS, S.A.
    Inventor: Armin Tajalli
  • Patent number: 10812816
    Abstract: An example method includes receiving a video bitstream with a high fidelity input format and side information related to the video bitstream. The side information includes a video bitstream representing the original video source with a low fidelity input format, coding parameters optimized based on knowledge of the original video source, transform coefficients, indicative of a residual between the original video source and a decoded version of the high fidelity format. The method further includes decoding the side information to generate transcoding guiding information, estimating a representation of video bitstream with a low fidelity output format, based on the received bit stream and the generated transcoding guiding information, improving the estimated low-fidelity representation by adding the transform coefficients of the side information to transform coefficients generated from the estimated low-fidelity representation, and encoding the improved estimated representation of the low-fidelity bitstream.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: October 20, 2020
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Kenneth Andersson, Thomas Rusert, Jonatan Samuelsson, Rickard Sjöberg
  • Patent number: 10805051
    Abstract: A single media access control (MAC) layer processor provides data to one or more baseband signal processors, which generate a plurality of baseband signals corresponding to the data provided by the MAC layer processor. The plurality of baseband signals includes at least a first baseband signal and a second baseband signal. The first baseband signal has a first frequency bandwidth and the second baseband signal has a second frequency bandwidth that is different than the first frequency bandwidth. The one or more baseband signal processors provide the plurality of baseband signals to a plurality of radio frequency (RF) radios for simultaneous wireless transmission via a plurality of RF segments.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: October 13, 2020
    Assignee: Marvell Asia Pte, Ltd.
    Inventors: Hongyuan Zhang, Liwen Chu
  • Patent number: 10791009
    Abstract: Apparatus and associated methods relate to adapting a continuous time linear equalization circuit with minimum mean square error baud-rate clock and data recovery circuit to be able to lock to the center or near center of an eye diagram. In an illustrative example, a circuit may include an inter-symbol interference (ISI) detector configured to receive data and error samples, a summing circuit coupled to the output of the ISI detector, a moving average filter configured to receive the output of the summing circuit and generate an average output, a voter configured to generate a vote in response to the average output and a predetermined threshold, and, an accumulator and code generator configured to generate a code signal in response to the generated vote. By introducing the moving average filter and the voter, a quicker way to lock to the center or near center of an eye diagram may be obtained.
    Type: Grant
    Filed: November 13, 2019
    Date of Patent: September 29, 2020
    Assignee: XILINX, INC.
    Inventors: Zhaoyin D. Wu, Parag Upadhyaya
  • Patent number: 10789201
    Abstract: A device includes a receiver to receive one or more training sequences during a training of a link, where the link connects two devices. The device may include agent logic to determine, from the one or more training sequences, a number of extension devices on the link between the two devices, and determine that the number of extension devices exceeds a threshold number. The device may include a transmitter to send a plurality of clock compensation ordered sets on the link based on determining that the number of extension devices exceeds a threshold number.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: September 29, 2020
    Assignee: Intel Corporation
    Inventors: Zuoguo Wu, Debendra Das Sharma, Mohiuddin M. Mazumder, Jong-Ru Guo, Anupriya Sriramulu, Narasimha Lanka, Timothy Wig, Jeff Morriss
  • Patent number: 10778153
    Abstract: Techniques are described for crest factor reduction in power amplifier circuits. For example, crest factor reduction can keep the peak signal level of a signal for transmission to below a peak threshold level associated with a power amplifier in the transmission path. The signal is received by the crest factor reduction system and clipped in accordance with the peak threshold level. Edge smoothing is then applied to the clipped signal to reduce out-of-band emissions. The edge smoothing is implemented by a moving average filter, such as a time-domain box filter. In some embodiments, a maximum operation or minimum operation is used to prevent signal peak regrowth after the filtering. Some embodiments also include various iteration loops to further improve crest factor reduction.
    Type: Grant
    Filed: February 4, 2020
    Date of Patent: September 15, 2020
    Assignee: SHENZHEN GOODIX TECHNOLOGY CO., LTD.
    Inventors: Amir Dezfooliyan, Waleed Younis, Tobias Seifert, Gunnar Nitsche
  • Patent number: 10776452
    Abstract: In order to at least approximately determine statistical properties of raw measured values, e.g., measurement noise and/or average errors, without knowledge of a filter applied to raw measured values and only with the aid of a useful signal obtained from the filtering, i.e., in order to make statements regarding measurement conditions by assuming a few frequently encountered boundary conditions, statistical properties of raw measured values are determined from the useful signal, which is composed of a temporal sequence of filter output values.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: September 15, 2020
    Assignee: Robert Bosch GmbH
    Inventors: Andreas Vogel, Kateryna Krykunova
  • Patent number: 10764095
    Abstract: Embodiments are disclosed for tuning a continuous time linear equalizer embedded in a receiver of a communication system. An example method includes receiving an N-point estimation of a channel pulse response associated with an input signal. The method further includes calculating an estimated power spectral density for one or more desired frequency bands. The method further includes updating one or more parameters of a continuous time linear equalizer to adjust one or more power densities of the one or more desired frequency bands based on the one or more estimated power spectral densities calculated. The method further includes calculating, for each desired frequency band, an estimated power spectral density after updating the one or more parameters of the continuous time linear equalizer to adjust the one or more power densities of the one or more desired frequency bands.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: September 1, 2020
    Assignee: MELLANOX TECHNOLOGIES, LTD.
    Inventors: Daniel Kedar, Eyal David, Johan Jacob Mohr, Stanislav Gurtovoy
  • Patent number: 10762031
    Abstract: An information handling system may include a central processing unit (CPU) and a device. The CPU may have an I/O system and be configured to host a BIOS. The device may be communicatively connected to the I/O system of the CPU by a connection. The BIOS may determine a communication protocol used by the device for communication and set an equalization of the I/O system for communication with the device based on the communication protocol used by the device.
    Type: Grant
    Filed: June 12, 2017
    Date of Patent: September 1, 2020
    Assignee: Dell Products, L.P.
    Inventors: Sandor Farkas, Stuart Allen Berke, Bhyrav M. Mutnury
  • Patent number: 10756579
    Abstract: A transmitter includes: a transmission control circuit that determines whether or not to perform an emphasis on a data signal, based on a transition pattern of the data signal; and a transmission driver that selectively performs the emphasis based on a result of the determination by the transmission control circuit, to generate at least one transmission signal.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: August 25, 2020
    Assignee: Sony Corporation
    Inventors: Hiroo Takahashi, Hideyuki Matsumoto, Tatsuya Sugioka, Hiroaki Hayashi
  • Patent number: 10749566
    Abstract: Certain aspects of the present disclosure generally relate to radio frequency (RF) front-end circuitry. For example, certain aspects provide an apparatus having a first converter circuit configured to upconvert a first baseband (BB) signal to a first RF signal based on a mode of operation, and a second converter circuit configured to upconvert a second BB signal to a second RF signal based on the mode of operation. The apparatus also includes a first RF weight adjustment circuit configured to selectively apply an amplitude weight or a phase weight to at least one of the first RF signal or the second RF signal based on the mode of operation, and a controller configured to control a power state of the second converter circuit in dependence on the mode of operation.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: August 18, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Joseph Patrick Burke, Ashwin Sampath, Mohammad Ali Tassoudji, Robert Gilmore, Vasanthan Raghavan
  • Patent number: 10749720
    Abstract: A receiver receives communications over a communication channel, which may distort an incoming communication signal. In order to counter this distortion, the frequency response of the receiver is manipulated by adjusting several frequency response parameters. Each frequency response parameter controls at least a portion of the frequency response of the receiver. The optimal values for the frequency response parameters are determined by modifying an initial set of values for the frequency response parameters through one or more of stochastic hill climbing operations until a performance metric associated with the receiver reaches a local maximum. The modified values are displaced through one or more mutation operations. The stochastic hill climbing operations may subsequently be performed on the mutated values to generate the final values for the frequency response parameters.
    Type: Grant
    Filed: May 22, 2019
    Date of Patent: August 18, 2020
    Assignee: NVIDIA Corporation.
    Inventors: Vishnu Balan, Mohammad Mobin, Rohit Rathi, Dai Dai
  • Patent number: 10742455
    Abstract: An equalizer adjusting device includes a comparator, an inequality counter, an adjuster, and the like. The comparator performs magnitude comparison between a voltage value Vout of each bit output from an equalizer and a threshold value MonLVL and outputs a logical value MonSMP according to a result of the comparison. The inequality counter inputs a logical value DatSMP output from a sampler in accordance with the result of magnitude comparison between the voltage value Vout of each bit and a reference value, and the logical value MonSMP output from the comparator and counts events in which the logical value DatSMP and the logical value MonSMP differ from each other, every period. The adjuster adjusts a gain of the equalizer and the threshold value MonLVL of the comparator based on a counted value of the inequality counter.
    Type: Grant
    Filed: July 11, 2019
    Date of Patent: August 11, 2020
    Assignee: THINE ELECTRONICS, INC.
    Inventor: Tomohiro Sakai
  • Patent number: 10721103
    Abstract: A signal receiving device and an equalizer tuning method thereof are provided. A first equalizer receives an input signal and generates a first equalized signal by compensating the input signal according to a first equalization parameter. A second equalizer generates a second equalized signal by compensating the first equalized signal according to a second equalization parameter. A clock and data recovery circuit recovers the second equalized signal to generate an output signal. An equalizing controller receives the input signal and outputs a first control signal and a second control signal, to adjust the first equalization parameter according to the first control signal and adjust the second equalization parameter according to the second control signal. The equalizing controller detects a first pattern symbol and a second pattern symbol from the output signal and tunes the second equalization parameter according to the number of the first pattern symbol and the second pattern symbol.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: July 21, 2020
    Assignee: ALI CORPORATION
    Inventors: Ming-Ta Lee, Hsu-Che Nee
  • Patent number: 10715276
    Abstract: In some embodiments, a bandwidth constrained equalized transport (BCET) communication system comprises a transmitter that transmits a signal, a communication channel that transports the signal, and a receiver that receives the signal. The transmitter can comprise a pulse-shaping filter that intentionally introduces memory into the signal, and an error control code encoder that is a low-density parity-check (LDPC) error control code encoder. The error control encoder comprises code that is optimized based on the intentionally introduced memory into the signal, a code rate, a signal-to-noise ratio, and an equalizer structure in the receiver. In some embodiments, the communication system is bandwidth constrained, and the transmitted signal comprises an information rate that is higher than for an equivalent system without intentional introduction of the memory at the transmitter.
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: July 14, 2020
    Assignee: NTWINE, LLC
    Inventors: Andreja Radosevic, Predrag Ivanis, Srdjan Brkic, Djordje Sarac, Nikola Alic
  • Patent number: 10715357
    Abstract: Selection of equalization coefficients to configure a communications link between a receiver in a host system and a transmitter in an optical or electrical communication module is performed by a management entity with access to management registers in the receiver and transmitter. Continuous modification of the selected equalization coefficients is enabled on the communications link after the communications link is established to handle varying operating conditions such as temperature and humidity.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: July 14, 2020
    Assignee: Intel Corporation
    Inventor: Adee Ofir Ran
  • Patent number: 10714134
    Abstract: An apparatus can include a circuit configured to process an input signal using a set of channel parameters. The circuit can produce, using a first adaptation algorithm, a first set of channel parameters for use by the circuit as the set of channel parameters in processing the input signal. The circuit can further approximate a second set of channel parameters of a second adaptation algorithm for use by the circuit as the set of channel parameters in processing the input signal based on the first set of channel parameters and a relationship between a third set of channel parameters generated using the first adaptation algorithm and a fourth set of channel parameters generated using the second adaptation algorithm. In addition, the circuit can perform the processing of the input signal using the second set of channel parameters as the set of channel parameters.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: July 14, 2020
    Assignee: Seagate Technology LLC
    Inventors: Marcus Marrow, Jason Bellorado, Vincent Brendan Ashe, Rishi Ahuja
  • Patent number: 10700797
    Abstract: Aspects of the disclosure are directed to providing signals utilizing two or more sources. As may be implemented in accordance with one or more embodiments, a method and/or apparatus involves processing respective signals carrying broadcast data provided by different receiver circuits that respectively receive the same broadcast data. The signals received from the respective receiver circuits are equalized, and corresponding sets of the broadcast data from each of the equalized signals are selectively combined to provide a combined signal carrying the broadcast data. This approach may be used, for example, to generate broadcast data utilizing source data from two or more receivers, such as may be received on different signal mediums (e.g., over-the-air digital radio and Wi-Fi digital radio), and therein providing enhanced reception.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: June 30, 2020
    Assignee: NXP B.V.
    Inventor: Naveen Jacob
  • Patent number: 10693485
    Abstract: An electronic device is disclosed that includes an analog-to-digital converter circuit, an adaptive filter circuit coupled to the analog-to-digital converter circuit to correct one or more circuit impairments in the analog-to-digital converter circuit, a training signal generator circuit to generate training signals, and an amplitude detector circuit configured to suspend generation of the training signals and cause the adaptive filter circuit to suspend adaptation when the input signal is above a predetermined threshold.
    Type: Grant
    Filed: March 22, 2019
    Date of Patent: June 23, 2020
    Assignee: AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE. LIMITED
    Inventors: Mo Maggie Zhang, Cy Chen
  • Patent number: 10659258
    Abstract: A method and apparatus to adjust a differential transmitter output impedance is disclosed. Output voltage is sampled and averaged to mitigate noise and leakage. Averaged uplevel and downlevel voltages are used to select a number of pullup devices and a number of pulldown devices to control the differential transmitter output impedance to match a distal termination resistance or a transmission line impedance.
    Type: Grant
    Filed: November 19, 2018
    Date of Patent: May 19, 2020
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Daniel Ramirez, Eric J Lukes, Henry M Newshutz, George F Paulik, Raymond A Richetta
  • Patent number: 10652052
    Abstract: A signaling circuit having a selectable-tap equalizer. The signaling circuit includes a buffer, a select circuit and an equalizing circuit. The buffer is used to store a plurality of data values that correspond to data signals transmitted on a signaling path during a first time interval. The select circuit is coupled to the buffer to select a subset of data values from the plurality of data values according to a select value. The equalizing circuit is coupled to receive the subset of data values from the select circuit and is adapted to adjust, according to the subset of data values, a signal level that corresponds to a data signal transmitted on the signaling path during a second time interval.
    Type: Grant
    Filed: June 5, 2019
    Date of Patent: May 12, 2020
    Assignee: Rambus Inc.
    Inventors: Jared L. Zerbe, Vladimir M. Stojanovic, Fred F. Chen
  • Patent number: 10641902
    Abstract: The positioning signals broadcast by GNSS constellations are affected by significant errors, notably due to the crossing of the ionospheric layer or of the tropospheric layer. Several unwieldy means have been deployed to provide professional users with corrections of said errors. These means, however, all require the knowledge of at least one precise reference point at a given distance. According to the invention, positioning receivers that are not very precise, such as smartphones, present in a geographical zone, of unknown precise position, can contribute to the production of precise atmospheric error corrections if said receivers are sufficiently numerous.
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: May 5, 2020
    Assignee: CENTRE NATIONAL D'ETUDES SPATIALES
    Inventors: Gaël Scot, Denis Laurichesse
  • Patent number: 10637692
    Abstract: A device includes a decoder configured to receive an input signal. The decoder is configured to also output a control signal based on the input signal. The device further includes an equalizer configured to receive a distorted bit as part of a data stream, receive the control signal, select a distortion correction factor based upon the control signal, apply the distortion correction factor to the distorted bit to offset inter-symbol interference from the data stream on the distorted input data to generate a modified value of the distorted bit, and generate a corrected bit based on the modified value of the distorted bit.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: April 28, 2020
    Assignee: Micron Technology, Inc.
    Inventors: Jennifer E. Taylor, Raghukiran Sreeramaneni
  • Patent number: 10630273
    Abstract: A clock circuit has a clock input terminal, a first clock output terminal, and a second clock output terminal. The clock circuit includes a pulse width adjustment module, a sampling module, a comparing module, and a differential signal converting module. A differential input terminal is electrically connected to a pulse width output terminal of the pulse width adjustment module. A positive differential signal output terminal and a negative differential signal output terminal are electrically connected to the first clock output terminal of the clock circuit and the second clock output terminal to output two clock signals with a phase difference of 180 degrees, respectively. A second input terminal of the sampling module is electrically connected to the second clock output terminal.
    Type: Grant
    Filed: April 24, 2019
    Date of Patent: April 21, 2020
    Assignee: REALTEK SEMICONDUCTOR CORP.
    Inventors: Ming-Hui Tung, Li-Jun Gu, Guan-Yu Chen, Bo-Yu Chen
  • Patent number: 10615881
    Abstract: Systems and methods are provided for adaptive equalization, for example for use with coherent optical reception. The equalizer has a loop for updating taps of an adaptive linear filter forming part of the equalizer. In the loop, an error calculator calculates an error, a gradient calculator calculates a gradient of the error or filtered error. One or more gradient filters are used to filter the gradient, and the filtered gradient is used to update the taps of the adaptive linear filter. A reduction in self oscillation in the equalizer is achieved by separating the frequencies with channel features that change with time and scaling them up to speed up convergence of the equalizer.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: April 7, 2020
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Nash'at Abughalieh, Zhuhong Zhang
  • Patent number: 10601310
    Abstract: A power generation system, wind turbine, and method of pulse width modulation (PWM) for power converters are disclosed. The method generally includes generating a substantially random distribution of timing values, applying a filter to the random distribution to produce a modified random distribution, and delivering PWM timing signals based on the modified random distribution to the power converters.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: March 24, 2020
    Assignee: VESTAS WIND SYSTEMS A/S
    Inventors: Søren Andersen, Duy Duc Doan, Gert Karmisholt Andersen, Thomas Drljevic-Nielsen
  • Patent number: 10594531
    Abstract: The disclosure refers to a synthesis filter bank, comprising: a transform module which is configured to receive a plurality of input signals, transform the plurality of input signals, and output a plurality of transformed signals, a plurality of filter modules, which are coupled to the transform module, and wherein each filter module of the plurality of filter modules is configured to receive two transformed signals from the transform module, process the two received transformed signals and output two processed signals, and a parallel-to-serial module which is coupled to the plurality of filter modules and which is configured to receive the processed signals from the plurality of filter modules, combine the received processed signals and output a combined signal. Furthermore, an analysis filter bank, a filter bank and methods for operating a synthesis filter bank and for operating an analysis filter bank are disclosed.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: March 17, 2020
    Assignee: Technische Universität München
    Inventors: Leonardo Gomes Baltar, Israa Slim, Josef A. Nossek
  • Patent number: 10581648
    Abstract: An integrated circuit equalizes a data signal expressed as a series of symbols. The symbols form data patterns with different frequency components. By considering these patterns, the integrated circuit can experiment with equalization settings specific to a subset of the frequency components, thereby finding an equalization control setting that optimizes equalization. Optimization can be accomplished by setting the equalizer to maximize symbol amplitude.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: March 3, 2020
    Assignee: Rambus Inc.
    Inventor: Ramin Farjad-Rad
  • Patent number: 10581652
    Abstract: A serial data channel includes a transmitter that encodes serial data using a quaternary PAM-4 scheme, wherein the four PAM-4 signal levels include two balanced pairs of differential signal levels. The channel includes a de-emphasis circuit that determines that first and second symbols are in a first PAM-4 state, that a third symbol is in a second PAM-4 state, and provides a first de-emphasis to a voltage level of the second symbol in response to determining that the third symbol is represented as the second state. The de-emphasis circuit further determines that fourth and fifth symbols are in the second state, that a sixth symbol is in the first state, and provides a second de-emphasis to a voltage level of the fifth symbol in response to determining that the sixth symbol is represented as the first state. The first de-emphasis and the second de-emphasis represent different de-emphasis levels.
    Type: Grant
    Filed: May 1, 2019
    Date of Patent: March 3, 2020
    Assignee: Dell Products, LP
    Inventors: Arun R. Chada, Jaydev M. Reddy, Bhyrav M. Mutnury, Jiayi He
  • Patent number: 10574489
    Abstract: The present invention is concerned with Cosine Modulated Filter Band modulation, in particular for a matrix equalizer for equalising a modulated signal carrying digital data, wherein the signal is modulated using a CMF6 and transmitted through a transmission channel having a channel impulse response c(t), wherein the matrix equalizer comprises: matrix coefficients W(i) determined based on the discrete-time matrix channel impulse response C(i) that is determined from the channel impulse response c(t); wherein the matrix equalizer is configured to equalize the modulated signal in order to reduce signal distortion introduced by the transmission channel. The present invention also concerns a method for equalising the CMFB modulated signal.
    Type: Grant
    Filed: August 6, 2018
    Date of Patent: February 25, 2020
    Assignee: ABB Schweiz AG
    Inventor: Dacfey Dzung
  • Patent number: 10554452
    Abstract: According to one embodiment, an electronic device executes decision feedback-type equalization for input data using a tap coefficient while updating the tap coefficient. The electronic device includes a first memory cyclically receiving a tap coefficient, holing the tap coefficient received, and cyclically outputting the tap coefficient held, and a second memory receiving the tap coefficient cyclically output from the first memory and holding the tap coefficient received. The tap coefficient cyclically output from the first memory is delayed by at least one cycle than the tap coefficient cyclically received by the first memory. The tap coefficient held in the second memory is used for the decision feedback-type equalization in a no-signal period in which no input data exist.
    Type: Grant
    Filed: July 27, 2018
    Date of Patent: February 4, 2020
    Assignee: Toshiba Memory Corporation
    Inventor: Mikio Shiraishi
  • Patent number: 10547387
    Abstract: Embodiments are disclosed for equalizing input signals for communication systems. An example method includes receiving an input signal. The input signal encodes a plurality of bits in a number of amplitude levels. The example method further includes converting the input signal to an equalized output signal using a plurality of lookup table circuits. The equalized output signal encodes a plurality of symbols in a number of amplitude levels. The example method further includes feeding the equalized output signal to an output driver circuit.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: January 28, 2020
    Assignee: MELLANOX TECHNOLOGIES DENMARK APS.
    Inventors: Juan Jose Vegas-Olmos, Steen Christensen, Johan Jacob Mohr
  • Patent number: 10530405
    Abstract: A communication device is provided that includes a receiver configured to receive a signal. The communication device further includes a determination circuit configured to determine an interference estimation signal of the received signal based on a first signal sample of the received signal and on an interference signal model. The communication device further includes a correction circuit configured to determine a corrected interference estimation signal based on the determined interference estimation signal and on a second signal sample of the received signal. The communication device further includes a subtraction circuit configured to subtract the corrected interference estimation signal from the received signal.
    Type: Grant
    Filed: December 24, 2015
    Date of Patent: January 7, 2020
    Assignee: Intel Corporation
    Inventors: David Arditti Ilitzky, Rocio Hernandez Fabian
  • Patent number: 10508537
    Abstract: This invention is designed for use in transmission of data between downhole module in a wellbore and a controlling module at the surface. The invention provides an apparatus for receiving data signals from a telemetry module comprising first and second adaptive equalisers, and in which in a first modulation mode the coefficients of the first adaptive equaliser are updated until an error signal falls below a predetermined threshold and in a second modulation mode the coefficients of the first adaptive equaliser are locked and coefficients of the second adaptive equaliser are updated to continually minimise an error signal in which the number of bits encoded by the symbols of the first signal in an initial modulation mode is fewer than the number of bits encoded by the symbols of the second signal in a subsequent modulation mode.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: December 17, 2019
    Assignee: E.V. OFFSHORE LIMITED
    Inventors: Sumanth Eadala, Jonathan Thursby
  • Patent number: 10505707
    Abstract: A method and system are provided for drift compensation, providing a live data approach to sampler offset calibration, such as for voltage and/or temperature (VT) drift. A serializer/deserializer (SerDes) system includes a SerDes receiver and receiver logic, the receiver logic including a forward error correction (FEC) module. A drift compensation device, or drift compensation engine, receives live error corrections from the FEC module based on FEC operations performed on live traffic passing through the SerDes receiver. A drift compensation command is provided to a data sampler in the SerDes receiver, to adjust a sampling voltage of the data sampler. When the system includes a plurality of data samplers, the drift compensation device determines the data sampler with which an error correction is associated. The drift compensation command can be sent after a threshold criterion is satisfied, such as completion of a statistics collection period, or a threshold number of corrections.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: December 10, 2019
    Assignee: MICROSEMI SOLUTIONS (U.S.), INC
    Inventor: Peter Graumann
  • Patent number: 10498565
    Abstract: System and method of timing recovery to achieve sampling phase optimization with aid of equalization adaptation. For equalizer filter, the offset between a current Center of Filter (COF) value and a nominal COF value is used as a measure for a clock phase correction resulted from an adaptive equalization process. A COF may be defined as a function of two selected tap weights or equal to a selected tap weight. The nominal COF value can be dynamically adapted based on the real-time sampling phase error. The tap weights of the equalizer filter are adjusted to decrease the offset, e.g., by interpolating/extrapolating selected tap weights based on the offset. By using sampling phase error as a feedback for COF_nom updating and so for equalization adaptation, the clock delay correction contributed by the adaptive equalization process is advantageously controlled to benefit sampling phase optimization.
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: December 3, 2019
    Assignee: MACOM TECHNOLOGY SOLUTIONS HOLDING, INC
    Inventors: Yehuda Azenkot, Georgios Takos, Bart Zeydel