Antinoise Or Distortion (includes Predistortion) Patents (Class 375/296)
  • Patent number: 11343000
    Abstract: Optical network systems are disclosed, including a transmitter comprising a digital signal processor that receives data; circuitry that generate a plurality of electrical signals based on the data; a plurality of filters, each of which receiving a corresponding one of the plurality of electrical signals, a plurality of roll-off factors being associated with a respective one of the plurality of filters; a plurality of digital-to-analog converter circuits that receive outputs from the digital signal processor, the outputs being indicative of outputs from the plurality of filters; a laser that supplies light; and a modulator that receives the light and outputs from the digital-to-analog converter circuits, the modulator supplying a plurality of optical subcarriers based on the outputs of the digital-to-analog converter circuits, such that one of the plurality of optical subcarriers carrying information for clock recovery.
    Type: Grant
    Filed: June 26, 2020
    Date of Patent: May 24, 2022
    Assignee: Infinera Corporation
    Inventors: Jeffrey T. Rahn, Kuang-Tsan Wu, Steven Joseph Hand, Han Henry Sun
  • Patent number: 11342999
    Abstract: An approach for pre-distorting an input signal for an optical transmitter so as to at least partially compensate in advance for linear and non-linear distortions of the optical transmitter is provided.
    Type: Grant
    Filed: October 22, 2020
    Date of Patent: May 24, 2022
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Thomas Duthel, Soeren Gehrke
  • Patent number: 11336493
    Abstract: A system includes a processor and a memory. The memory stores instructions executable by the processor to identify an equalization response for equalizing an output signal of a modulator of a satellite gateway, generate a compensation response based on the equalization response and a sample rate of a pre-distorter of the modulator, and send the equalization response to the pre-distorter.
    Type: Grant
    Filed: December 31, 2020
    Date of Patent: May 17, 2022
    Assignee: Hughes Network Systems, LLC
    Inventors: Kumudchandra Patel, Robert Kepley, Jack Edwin Lundstedt, Jr., Yogesh Sethi, Gaurav Bhatia, Vinay Gandla
  • Patent number: 11336349
    Abstract: An example method may include obtaining first beamforming feedback from a station based on first sounding signals from a first set of antennas selected from multiple antennas of an access point, and obtaining second beamforming feedback from the station based on second sounding signals from a second set of antennas selected from the multiple antennas of the access point. The method may also include, using the first beamforming feedback and the second beamforming feedback, determining correlational relationships between pairs of the multiple antennas of the access point, and deriving a beamforming steering matrix from the correlational relationships.
    Type: Grant
    Filed: November 16, 2020
    Date of Patent: May 17, 2022
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Evgenii Dombrovskii
  • Patent number: 11335240
    Abstract: Disclosed is an electronic device including a display panel, an oscillator generating a clock signal, a display driving integrated circuit (DDI) generating first time information, using the clock signal, a sensor, and at least one processor identifying a variable measured by using the sensor or second time information corresponding to a reference time. The at least one processor is configured to measure a variable, using the sensor, to correct an error time between the first time information and second time information corresponding to a reference time, based on the variable, and to deliver the corrected error time or the second time information to the DDI such that the DDI corrects the first time information based on the corrected error time to display a screen of the display panel. Besides, various embodiments as understood from the specification are also possible.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: May 17, 2022
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yohan Lee, Jongkon Bae, Yunpyo Hong, Dongkyoon Han
  • Patent number: 11329708
    Abstract: A CSI feedback method and a CSI feedback device are provided.
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: May 10, 2022
    Assignee: DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD.
    Inventors: Hui Li, Qiubin Gao, Runhua Chen, Wenhong Chen, Rakesh Tamrakar
  • Patent number: 11323143
    Abstract: In certain aspects, a device for wireless transmission includes a transmission path, a feedback path, and a DPD control module. The transmission path includes a digital pre-distortion (DPD) conversion module configured to perform pre-distortion processing on an amplitude and a phase of a transmission signal based on a pre-distortion processing strategy. The transmission path further includes a power amplifier coupled to a downstream of the DPD conversion module and configured to amplify a power of the transmission signal. The feedback path is coupled to the transmission path at the downstream of the power amplifier and configured to generate a feedback signal. The DPD control module is coupled to the feedback path and the DPD conversion module and configured to adjust the pre-distortion processing strategy based on an amplitude difference and a phase difference between the transmission signal and the feedback signal.
    Type: Grant
    Filed: July 29, 2021
    Date of Patent: May 3, 2022
    Assignee: BESTECHNIC (SHANGHAI) CO., LTD.
    Inventors: Weifeng Tong, Liang Zhang, Zhiqi Wang
  • Patent number: 11316482
    Abstract: In an embodiment, an apparatus includes: a modulator to modulate a first signal; a distortion circuit coupled to the modulator to digitally pre-distort the first signal to compensate for a distortion of an amplifier; a distortion characterization circuit coupled to the distortion circuit to determine the distortion of the amplifier and configure the distortion circuit based on the determined distortion; a mixer coupled to the distortion circuit to upconvert the pre-distorted first signal to a pre-distorted radio frequency (RF) signal; and the amplifier coupled to the mixer to amplify the pre-distorted RF signal and output an amplified RF signal.
    Type: Grant
    Filed: June 18, 2020
    Date of Patent: April 26, 2022
    Assignee: Silicon Laboratories Inc.
    Inventors: Luigi Panseri, Mustafa Koroglu, Emmanuel Gautier, Pascal Blouin
  • Patent number: 11315584
    Abstract: The present disclosure relates to an apparatus for decoding an encoded Unified Audio and Speech stream. The apparatus comprises a core decoder for decoding the encoded Unified Audio and Speech stream. The core decoder includes an eSBR unit for extending a bandwidth of an input signal, the eSBR unit including a QMF based harmonic transposer. The QMF based harmonic transposer is configured to process the input signal in the QMF domain, in each of a plurality of synthesis subbands, to extend the bandwidth of the input signal. The QMF based harmonic transposer is configured to operate at least in part based on pre-computed information. The present disclosure further relates to corresponding methods and storage media.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: April 26, 2022
    Assignee: Dolby International AB
    Inventors: Rajat Kumar, Ramesh Katuri, Saketh Sathuvalli, Reshma Rai
  • Patent number: 11310000
    Abstract: A wireless communication method for transmitting wireless signals from a transmitter includes dividing bits of the transport block into a number of code blocks, wherein each code block corresponds to a bit-level of a multi-level modulation scheme used for transmission, and wherein a size of each code block is inversely proportional to a corresponding coding rate used for coding the code block.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: April 19, 2022
    Assignee: Cohere Technologies, Inc.
    Inventors: Christian Ibars Casas, Shachar Kons, Ronny Hadani
  • Patent number: 11296658
    Abstract: Device and method are disclosed for downlink gain compensation at a radio unit. According to an embodiment, the device comprises a pre-distortion circuit, a digital gain adjuster, a gain determiner and a first gain controller. The pre-distortion circuit is configured to generate and apply a pre-distortion to an input signal. The digital gain adjuster is configured to apply an adjustable gain to an output signal from the pre-distortion circuit. The gain determiner is configured to determine a gain difference between a target downlink gain and current downlink gain. The first gain controller is configured to control the digital gain adjuster based on the gain difference. A radio unit comprising the device is also disclosed.
    Type: Grant
    Filed: August 13, 2018
    Date of Patent: April 5, 2022
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Peng Liu, Yahui Liu, Junfeng Jie, Gan Wen, Guangfeng Liu
  • Patent number: 11283666
    Abstract: A wireless communications system includes a stochastic pre-distortion actuator configured to receive a carrier-modulated signal and convert the carrier-modulated signal into an output signal. The system includes one or more antennas configured to receive the output signal and transmit the output signal, one or more power amplifiers electrically coupled between the pre-distortion actuator and the one or more antennas and a receiver configured to receive the output signal over-the-air and generate feedback based on the output signal. The pre-distortion actuator is configured to generate the output signal by applying a correction to the carrier-modulated signal that cancels out nonlinearities associated with the one or more antennas and/or the one or more power amplifiers. The pre-distortion actuator is configured based on the feedback.
    Type: Grant
    Filed: February 25, 2021
    Date of Patent: March 22, 2022
    Assignee: Space Exploration Technologies Corp.
    Inventors: Martin S. McCormick, Feipeng Wang
  • Patent number: 11277225
    Abstract: A probabilistic signal point shaping device comprises circuitry configured to map data blocks of input bits of an input bit stream onto mapping symbols, wherein said mapping symbols are distributed according to a predetermined probability distribution and represented by complex-valued signal points or non-uniformly spaced amplitude levels, assign bit labels to said mapping symbols, determine redundancy bits from the bits of said bit labels, transform said redundancy bits into a redundancy rule, and apply the redundancy rule to the mapping symbols to obtain output symbols.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: March 15, 2022
    Assignee: Sony Coroporation
    Inventors: Thomas Handte, Reka Inovan
  • Patent number: 11277182
    Abstract: The present application relates to the field of communications, and in particular to a hybrid beam forming architecture-based calibration compensation method and apparatus for improving the accuracy and effectiveness of calibration compensation. The method comprises: a base station determining a preset calibration weight vector matrix W and a preset first calibration signal matrix S, then transmitting N times consecutively calibration signals through analog transmission channels, calculating, according to the calibration weight vector matrix W, the first calibration signal matrix S and a first received data vector matrix YTX, a transmission channel error matrix ETX, and then performing error compensation on the analog transmission channels based on ETX.
    Type: Grant
    Filed: March 4, 2020
    Date of Patent: March 15, 2022
    Assignee: Datang Mobile Communications Equipment Co., Ltd.
    Inventors: Jingyan Ma, Shihua Wang, Tao Duan, Jian Wu, Yongli Zhang
  • Patent number: 11271601
    Abstract: Systems and methods for pre-distortion pattern recognition are provided. In certain embodiments, the system includes an electronic device that provides an output signal, wherein the electronic device applies distortion to the output signal. The system also includes a pre-distorter that provides an input signal to the electronic device, wherein the pre-distorter applies a pre-distortion to the input signal before the electronic device receives the input signal. Further, the system includes a pre-distorter design block that identifies the distortion from an association between the output signal and a finite set of symbols and updates the pre-distortion based on the association.
    Type: Grant
    Filed: October 19, 2020
    Date of Patent: March 8, 2022
    Assignee: Honeywell International Inc.
    Inventors: Daniel Pachner, Vladimir Havlena
  • Patent number: 11265127
    Abstract: Embodiments of this application disclose a method and an apparatus for transmitting a DMRS, and relate to the field of communications technologies. The method and the apparatus are applicable to an NR system. The method for transmitting a DMRS may include: determining a time-frequency resource used to carry a DMRS; and then sending the DMRS by using the time-frequency resource.
    Type: Grant
    Filed: September 10, 2019
    Date of Patent: March 1, 2022
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Xiang Ren, Yong Liu, Shibin Ge, Xiaoyan Bi
  • Patent number: 11258521
    Abstract: A front-end circuit is used to test an RF signal from an RF device. The RF signal is generated by modulating a carrier signal having a carrier frequency with a wideband baseband signal. A variable frequency oscillator generates a local signal having a variable local frequency. The first frequency mixer frequency mixes a local signal and an RF signal to generate an IF signal having a frequency. A band-pass type first filter filters the IF signal. The local frequency can be selected from a plurality of frequencies having a frequency interval equal to or narrower than a bandwidth of the first filter.
    Type: Grant
    Filed: September 15, 2020
    Date of Patent: February 22, 2022
    Assignee: ADVANTEST CORPORATION
    Inventors: Koji Asami, Takahiro Kudo
  • Patent number: 11252396
    Abstract: An advanced communication system is provided. The advanced communication system comprises generating a first signal with a polyphase coding based on a DFT spread OFDM with at least one CAZAC sequence in accordance with a configuration condition, applying a digital transmit beamforming to the generated first signal, converting the first signal to analog from digital, modulating the converted first signal with an energy source, emitting, using at least one energy emit element, the modulated first signal, detecting a second signal comprising at least a portion of the emitted first signal that is reflected from at least one object in a scene in a field-of-view, demodulating the detected second signal, converting the second signal to digital from analog, converting the converted second signal to a computational image, and generating a 3D image by applying coherent detection to the computational image. The first signal comprises a polyphase sequence.
    Type: Grant
    Filed: February 10, 2020
    Date of Patent: February 15, 2022
    Assignee: Aura Intelligent Systems, Inc.
    Inventor: Jungah Lee
  • Patent number: 11239866
    Abstract: A digital-to-analog conversion system is provided. The digital-to-analog conversion system includes a digital-to-analog converter configured to receive a pre-distorted digital signal from a digital circuit, and to generate an analog signal based on the pre-distorted digital signal. Further, the digital-to-analog conversion system includes a feedback loop for providing a digital feedback signal to the digital circuit. The feedback loop includes an analog-to-digital converter configured to generate the digital feedback signal based on the analog signal, and wherein a sample rate of the analog-to-digital converter is lower than a sample rate of the digital-to-analog converter.
    Type: Grant
    Filed: July 9, 2020
    Date of Patent: February 1, 2022
    Assignee: Intel Corporation
    Inventors: Daniel Gruber, Ramon Sanchez, Kameran Azadet, Martin Clara
  • Patent number: 11239870
    Abstract: This application relates to the field of communications technologies and discloses a transmitter device and a signal processing method. m transmit antenna groups of the transmitter are configured to send m training signals under control of the processor. A target feedback antenna of the transmitter is configured to receive, under control of the processor, a first mixed signal obtained by superimposing the m training signals in space, where a phase difference between the first mixed signal and a second mixed signal obtained by superimposing in space the m training signals received by a receiver device falls within a preset range. A processor of the transmitter is configured to: perform DPD parameter estimation and pre-distortion processing on a to-be-sent signal. The m transmit antenna groups are further configured to send, under control of the processor, the to-be-sent signal on which pre-distortion processing has been performed.
    Type: Grant
    Filed: May 14, 2021
    Date of Patent: February 1, 2022
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yibo Lv, Xu Li, Guangjian Wang, Jingjing Huang
  • Patent number: 11239931
    Abstract: A generalized frequency division multiplexing method with multiple-input multiple-output and flexible index modulation, which enables to have the energy efficiency provided by space and frequency index modulation systems with generalized frequency division multiplexing (GFDM) without complicating the transmitter and receiver structure and provide for the efficient use of frequency resources, increase in spectral efficiency, minimum complexity and increase in energy efficiency.
    Type: Grant
    Filed: July 3, 2018
    Date of Patent: February 1, 2022
    Assignees: ISTANBUL TEKNIK UNIVERSITESI, NETAS TELEKOMUNIKASYON A.S.
    Inventors: Ersin Ozturk, Ertugrul Basar, Hakan Ali Cirpan
  • Patent number: 11228330
    Abstract: A method comprising: obtaining a first radio signal and a second radio signal, determining a first envelope signal based on the first radio signal and a second envelope signal based on the second radio signal, determining a preview envelope signal based on the first envelope signal and the second envelope signal, determining a common clipping gain signal based on the preview envelope signal, determining a first clipping gain signal based on the common clipping gain signal and a first weighing factor, determining a second clipping gain signal based on the common clipping gain signal and a second weighing factor, performing a first crest factor reduction for the first radio signal utilizing the first clipping gain signal, and performing a second crest factor reduction for the second radio signal utilizing the second clipping gain signal.
    Type: Grant
    Filed: October 9, 2020
    Date of Patent: January 18, 2022
    Assignee: Nokia Solutions and Networks Oy
    Inventors: Grzegorz Haza, Radoslaw Ceszkiel, Gunter Wolff, Björn Jelonnek
  • Patent number: 11211104
    Abstract: Disclosed are systems and methods involving memory-side write training to improve data valid window. In one implementation, a method for performing memory-side write training may comprise delaying a rising edge or a falling edge of a first data signal, delaying a rising edge or a falling edge of a second data signal, and aligning the two adjusted signals to reduce a window of time that the data signals are not valid and thereby improve or optimize the data valid window (DVW) of a memory array. According to implementations herein, various edges of data signals and clock signals may be adjusted or delayed via dedicated trim cells or circuitry present in the data paths located on the memory side of a system.
    Type: Grant
    Filed: November 6, 2020
    Date of Patent: December 28, 2021
    Assignee: Micron Technology, Inc.
    Inventors: Agatino Massimo Maccarrone, Luigi Pilolli, Ali Feiz Zarrin Ghalam, Chin Yu Chen
  • Patent number: 11206071
    Abstract: A UE may be configured to communicate using one of analog beamforming or hybrid beamforming. The UE may receive a set of beamformed signals from a base station. The UE may determine a set of angular spread values associated with a set of clusters in a channel between the base station and the UE based on the set of beamformed signals received from the base station. The UE may transmit the set of angular spread values to the base station. The UE may receive, from the base station based on the set of angular spread values, a set of transmission ranks associated with at least one cluster of the set of clusters. The UE may communicate at least one data stream with the base station across the at least one cluster using the set of transmission ranks associated with the at least one cluster of the set of clusters.
    Type: Grant
    Filed: August 18, 2020
    Date of Patent: December 21, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Vasanthan Raghavan, Juergen Cezanne, Junyi Li, Dai Lu, Joseph Patrick Burke, Wenjun Li
  • Patent number: 11206169
    Abstract: Systems and methods are disclosed for modulating wireless signals in 5G (and future 6G) networks, to mitigate faults from noise or interference, optimize reliability, and enhance message throughput, according to some embodiments. Versions may include modulation tables for phase and amplitude modulation of message symbols in which the number of amplitude levels is different from the number of phase levels. Alternatively, the number of amplitude levels and/or phase levels may be other than a power of two. Other versions may provide a non-uniform spacing of amplitude levels or phase levels for optimal SNR throughout. Specific modulation states of the modulation table may be excluded, or declared invalid for signaling, thereby increasing the noise immunity of the remaining valid states. Embodiments of the disclosed modulation tables can provide improved signal clarity, fewer dropped messages, fewer retransmit requests, higher throughput, faster uploads and downloads, and more satisfied wireless customers overall.
    Type: Grant
    Filed: March 16, 2021
    Date of Patent: December 21, 2021
    Assignee: ULTRALOGIC 5G, LLC
    Inventors: David E. Newman, R. Kemp Massengill
  • Patent number: 11200821
    Abstract: An image processing chip test method comprising: controlling a power supply circuit to provide a first operating voltage to an image processing chip comprising a storage device; and when reading written first image data from the storage device, the test device receives a first error detection code corresponding to the first image data and determines whether the first error detection code means an error occurs. If an error occurs, record the first operating voltage as an erroneous operating voltage, and if the error does not occur, provide a second operating voltage to the image processing chip. Also, when the written second image data is read from the storage device, the test device receives a second error detection code corresponding to the second image data and determines whether the second error detection code means an error occurs.
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: December 14, 2021
    Assignee: Realtek Semiconductor Corp.
    Inventors: Zong-Da Huang, Ching-Lan Yang
  • Patent number: 11190147
    Abstract: In one embodiment, an apparatus includes: a digital baseband circuit to receive a digital baseband signal and output a first digital baseband signal and a second digital baseband signal, the second digital baseband signal comprising a scaled version of the first digital baseband signal; a first transmitter signal path coupled to the digital baseband circuit to process the first digital baseband signal and output a first radio frequency (RF) signal; a second transmitter signal path coupled to the digital baseband circuit to process the second digital baseband signal and output a second RF signal; a first power amplifier coupled to the first transmitter signal path to amplify the first RF signal and output an amplified first RF signal; and a second power amplifier coupled to the second transmitter signal path to amplify the second RF signal and output an amplified second RF signal.
    Type: Grant
    Filed: June 18, 2020
    Date of Patent: November 30, 2021
    Assignee: Silicon Laboratories Inc.
    Inventors: Mustafa Koroglu, Luigi Panseri, Yu Su, Vitor Pereira
  • Patent number: 11184205
    Abstract: A receiving apparatus includes a receiving section that receives a data signal, a demodulation reference signal, and a specific signal in at least one of a plurality of layers, and a control section that, based on the demodulation reference signal and the specific signal, estimates interference, controls transmission of a result of the estimation, and performs a modulo operation of the data signal.
    Type: Grant
    Filed: May 10, 2018
    Date of Patent: November 23, 2021
    Assignee: NTT DOCOMO, INC.
    Inventors: Yuki Matsumura, Satoshi Nagata, Xin Wang, Jing Wang, Xiaolin Hou
  • Patent number: 11165546
    Abstract: A method for a terminal to receive Sounding Reference Symbol (SRS) configuration information in a wireless communication system comprises: a step of receiving SRS configuration information for SRS transmission in units of concatenated SRS blocks from a base station; and a step of transmitting SRS to the base station on the concatenated SRS blocks on the basis of the SRS configuration information, wherein the SRS configuration information may include information indicating a length of one SRS block, information indicating the number of SRS blocks, and information indicating an SRS block in which truncation is performed among the concatenated SRS blocks.
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: November 2, 2021
    Assignee: LG Electronics Inc.
    Inventors: Kukheon Choi, Jonghyun Park, Jiwon Kang, Kyuseok Kim, Minki Ahn, Kilbom Lee
  • Patent number: 11159252
    Abstract: An electronic device is disclosed and may comprise: an amplifier for amplifying a signal; a filter circuit for filtering the amplified signal; a coupler for delivering a feedback signal with respect to the filtered signal; an antenna for radiating the filtered signal to the outside; and a communication circuit for generating the signal, wherein communication circuit: generates a signal, using designated information; delivers the generated signal to the amplifier; acquires, from the coupler, a first feedback signal and a second feedback signal with respect to signals amplified by the amplifier; and determines whether there is an error in a signal transmitted to an external apparatus, on the basis of the designated information, magnitude information of the first feedback signal, and frequency information of the second feedback signal. In addition, various embodiments recognized through the specification are possible.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: October 26, 2021
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jonghun Yoo, Dongil Yang, Hyoseok Na
  • Patent number: 11159208
    Abstract: Disclosed is an apparatus and a method of deriving an optimal precoder, in which a precoder is derived using water filling power allocation, and then is multiplied with some unitary matrix satisfying certain conditions to meet a per layer power constraint. Since the multiplication with the unitary matrix does not change the capacity, the derived precoder is optimal in achieving maximum capacity in a multiple input multiple output (MIMO) wireless communication scheme.
    Type: Grant
    Filed: September 24, 2020
    Date of Patent: October 26, 2021
    Inventors: Yanru Tang, Hongbing Cheng, Qi Zhan
  • Patent number: 11152699
    Abstract: Method, apparatus and arrangement for linearizing of a transmitter array having a plurality of non-linear branches for transmitting into a predetermined direction, wherein the non-linear branches may purposively be made different to obtain varying responses of the non-linear branches over the transmitter array. A combined array response is determined via a feedback structure that models an array response to the predetermined direction and predistortion coefficients are determined based on the measured array response. A feedback circuit with a plurality of feedback branches can be used for feeding back individual response signals at the outputs of the non-linear branches through phase shift and attenuation units of the feedback branches, and for combining the response signals at the outputs of the feedback branches, wherein phase shift and attenuation of each feedback branch is controlled to model a transmission channel of the individual response signals to a receiver in a predetermined direction.
    Type: Grant
    Filed: November 23, 2018
    Date of Patent: October 19, 2021
    Assignee: Nokia Technologies Oy
    Inventors: Nuutti Tervo, Aarno Tapio Parssinen, Marko Leinonen
  • Patent number: 11133834
    Abstract: Systems and methods are described to perform wireless communication. The device includes a pre-distortion circuit configured to pre-distort an input signal based on a parameter set including a plurality of coefficients and generate a pre-distorted signal, a power amplifier configured to amplify the pre-distorted signal and generate an output signal, and a parameter obtaining circuit configured to perform an iterative approximation operation based on the output signal and the pre-distorted signal, which change over time, according to an indirect training structure configured to minimize a difference between an intermediate signal obtained based on the output signal and the pre-distorted signal, and obtain the parameter set.
    Type: Grant
    Filed: January 8, 2020
    Date of Patent: September 28, 2021
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hongmin Choi, Junse Lee, Hyunseok Yu
  • Patent number: 11128332
    Abstract: Example aspects of the present disclosure are directed to front end modules for use in communication systems. In one example aspect, a front end module can include a receive path. The receive path can include a low noise amplifier. The receive path can include an analog to digital converter (ADC) circuit operable to receive an analog signal from the low noise amplifier and convert the analog signal to a digital RF receive signal. The receive path can include an ADC post processing circuit operable to process the digital RF receive signal in the digital domain. The front end module can include a transmit path. The transmit path can include a digital to analog converter circuit operable to convert the digital RF transmit signal to an analog RF transmit signal. The transmit path can include a power amplifier.
    Type: Grant
    Filed: November 11, 2019
    Date of Patent: September 21, 2021
    Assignee: Ethertronics, Inc.
    Inventors: Vahid Manian, Hamid Eslami, Norik Dzhandzhapanyan
  • Patent number: 11128502
    Abstract: Embodiments of the present application provide a reference signal transmission method, a device, and a system. The method includes: determining, by a first device, at least one reference signal generation sequence corresponding to at least one frequency-domain resource group that is on a symbol carrying a reference signal and that is used to send the reference signal, where one frequency-domain resource group is corresponding to one reference signal generation sequence; and generating, by the first device, the reference signal based on the at least one reference signal generation sequence, and mapping the reference signal to a time-frequency resource whose time domain is the symbol and whose frequency domain is the at least one frequency-domain resource group.
    Type: Grant
    Filed: October 8, 2018
    Date of Patent: September 21, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Yi Zhang, Chi Zhang
  • Patent number: 11115694
    Abstract: An information processing apparatus for reproducing second content in synchronization with reproduction of first content by a second information processing apparatus different from the information processing apparatus, the first content comprising audio content. The information processing apparatus comprising circuitry configured to: extract a first feature from the audio content; obtain a second feature of the audio content, the second feature being together with the second content; compare the first feature with the second feature; and generate, based on results of the comparing, synchronization information used for reproducing the second content in synchronization with the first content.
    Type: Grant
    Filed: October 17, 2019
    Date of Patent: September 7, 2021
    Assignee: Sony Corporation
    Inventors: Akira Inoue, Shusuke Takahashi, Masayuki Nishiguchi
  • Patent number: 11115080
    Abstract: A vectoring controller is configured to determine first coefficient values for a vectoring matrix at a first tone based on a first number of iterations through an iterative update algorithm and a first channel matrix estimate at the first tone, and to determine second coefficient values for the vectoring matrix at a second neighboring tone based on a second number of iterations through the iterative update algorithm and a second channel matrix estimate at the second tone. The vectoring controller is configured to start with the first coefficient values as initial values for the respective second coefficient values in the iterative update algorithm. The second number of iterations is lower than or equal to the first number of iterations.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: September 7, 2021
    Assignee: Alcatel Lucent
    Inventors: Rodrigo Bastos Moraes, Paschalis Tsiaflakis, Mihaela Jivanescu, Jochen Maes, Carl Nuzman
  • Patent number: 11108364
    Abstract: A circuit for signal classification in a digital pre-distortion (DPD) system is provided. The circuit includes a first frequency path with a positive frequency translation to generate a first power level corresponding to a signal output of the first frequency path, a second frequency path with a negative frequency translation to generate a second power level corresponding to a signal output of the second frequency path, and a third frequency path configured to filter the input signal via a high pass filter (HPF) and to generate a third power level corresponding to a signal output of the third frequency path. The circuit further includes a processing unit configured to compute frequency content metrics corresponding to the input signal based on the first power level, the second power level and the third power level for selecting a set of DPD coefficients for the DPD circuit.
    Type: Grant
    Filed: May 21, 2020
    Date of Patent: August 31, 2021
    Assignee: Xilinx, Inc.
    Inventors: Vincent C Barnes, Ponnamanda Venkata Chandra Sekhar, Prateek Jha
  • Patent number: 11082065
    Abstract: The present technology relates to a data processing apparatus and a data processing method that are able to provide an LDPC code with a good error rate. An LDPC encoder performs coding by an LDPC code having a code length of 16200 bits and a code rate of 12/15. The LDPC code includes an information bit and a parity bit, and a parity check matrix H is configured with an information matrix portion corresponding to the information bit of the LDPC code and a parity matrix portion corresponding to the parity bit. An information matrix portion of the parity check matrix H is represented by a parity check matrix initial value table representing a position of an element of 1 in the information matrix portion at an interval of 360 columns. The present technology may be applied to a case of performing an LDPC coding and an LDPC decoding.
    Type: Grant
    Filed: August 26, 2019
    Date of Patent: August 3, 2021
    Assignee: SATURN LICENSING LLC
    Inventors: Yuji Shinohara, Makiko Yamamoto
  • Patent number: 11075659
    Abstract: This application provides a power adjustment method and apparatus. The method includes obtaining a to-be-output signal, performing first automatic gain control (AGC) processing on the to-be-output signal to obtain the to-be-output signal on which the first AGC processing is performed, and to obtain a gain value of the to-be-output signal. The method also includes performing digital pre-distortion (DPD) processing on the to-be-output signal on which the first AGC processing is performed, to obtain the to-be-output signal on which the DPD processing is performed. The method further includes calculating an output power back-off (OBO) value based on the gain value, adjusting, based on the OBO value, output power of the to-be-output signal on which the DPD processing is performed, and sending, to a signal receive end, the to-be-output signal on which the power adjustment is performed.
    Type: Grant
    Filed: August 12, 2020
    Date of Patent: July 27, 2021
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Meng Cai, Kun Li
  • Patent number: 11076312
    Abstract: A user equipment (UE) may determine channel state information (CSI) reports with each CSI report being related to a component carrier. The UE may send a subframe with CSI report(s) on a physical uplink control channel (PUCCH). When a collision occurs in the subframe having the CSI report(s) on the PUCCH a lower priority CSI report may be dropped from the transmission.
    Type: Grant
    Filed: February 3, 2020
    Date of Patent: July 27, 2021
    Assignee: WIRELESS FUTURE TECHNOLOGIES INC.
    Inventors: Timo Erkki Lunttila, Esa Tapani Tiirola, Kari Pekka Pajukoski, Kari Juhani Hooli
  • Patent number: 11070416
    Abstract: An electronic device discussed herein may include an imbalance compensation logic that determines an imbalance parameter based at least in part on received quadrature signals from quadrature generation circuitry. The imbalance parameter may be determined using noise received by a receiver as an input radio frequency signal. By using the systems and methods described herein, an accuracy of detecting the imbalance may improve. Furthermore, by including the imbalance compensation logic internal to the electronic device, the imbalance compensation logic may provide continued imbalance detection over a lifespan of the electronic device.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: July 20, 2021
    Assignee: Apple Inc.
    Inventors: Mohammad Janani, Carlos H. Arrabal Azzalini
  • Patent number: 11070261
    Abstract: The present invention relates to a method and a device for beamforming, and, more particularly, to a method and a device for transmitting a downlink signal by using a two-dimensional active array antenna in a wireless communication system. In order to achieve the objective mentioned above, a beamforming method by a base station in a mobile communication system, according to one embodiment of the present invention, comprises the steps of: receiving an uplink signal from at least one terminal; determining directivity information of a vertical channel of a downlink for the at least one terminal on the basis of the uplink signal; and performing resource scheduling and beamforming for the at least one terminal on the basis of the directivity information of the vertical channel of the downlink and channel status information in a horizontal direction received from the at least one terminal.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: July 20, 2021
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Myoungwon Lee, Myonghee Park, Keonwook Lee
  • Patent number: 11064024
    Abstract: A distributed data system divides an original file into N different block files and distributes the block files to a number of servers of N or more in a distributed manner. The distributed data system includes an encoding unit configured to separate the original file into pieces of data at the same interval, separate the separated pieces of data into N pieces again, respectively multiply the N pieces of data which are separated again by coefficients corresponding to servers to which the pieces of data are to be distributed, and total the values to compress data into one piece of data, and a decoding unit configured to acquire a linear equation for collecting and decoding encoded data from the selected N servers, and obtaining the N block files from the respective servers.
    Type: Grant
    Filed: November 10, 2017
    Date of Patent: July 13, 2021
    Assignee: ASJ INC.
    Inventor: Hiroshi Nishida
  • Patent number: 11057248
    Abstract: A baseband system includes: an estimation and compensation circuit estimating frequency-independent non-ideal effects based on an original IQ signal pair, and compensating the original IQ signal pair based on a result of the estimation to obtain a compensated IQ signal pair; a channel estimation and equalization circuit performing channel estimation and equalization based on the compensated IQ signal pair to obtain an equalized IQ signal pair; and a tracking and compensation circuit obtaining a result of tracking of residual quantities of the aforesaid non-ideal effects based on the equalized IQ signal pair, and compensating the equalized IQ signal pair based on the result of the tracking to obtain an output IQ signal pair.
    Type: Grant
    Filed: June 8, 2020
    Date of Patent: July 6, 2021
    Assignee: NATIONAL CHIAO TUNG UNIVERSITY
    Inventors: Zheng-Chun Huang, Wei-Che Lee, Hung-Chih Liu, Chih-Wei Jen, Shyh-Jye Jou, Yu-Hwai Tseng
  • Patent number: 11050446
    Abstract: An electronic device according to various embodiments of the present invention comprises: a transceiver; a power amplifier; at least one antenna; a coupler; a memory for storing reference phase information; and a processor.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: June 29, 2021
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Wonsub Lim, Doil Ku, Dongil Yang, Hyoseok Na
  • Patent number: 11050403
    Abstract: A circuit module includes a wiring board on which are provided a ground plane, a signal line, and a conductive pattern for connection to an outer conductor of a coaxial cable including an inner conductor and the outer conductor. A common-mode choke coil is mounted on the wiring board such that one of coils of the common-mode choke coil connects the ground plane and the conductive pattern and that the other coil is inserted in the signal line. A communication element is mounted on the wiring board and includes a first signal terminal and a second signal terminal. The first signal terminal is connected to the common-mode choke coil via the signal line, and the second signal terminal is connected to the ground plane. A first capacitor is inserted in series in the signal line between the common-mode choke coil and the first signal terminal.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: June 29, 2021
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Tarou Higuchi, Yoshihiro Imanishi, Yasushi Saito, Shun Takai, Miyuki Nojiri
  • Patent number: 11044131
    Abstract: A transmission device that improves data reception quality includes: a first pilot inserter that inserts a pilot signal into a first precoded signal; a phase changer that applies a phase change of i×?? to the second precoded signal, where i is a symbol number and an integer that is greater than or equal to 0; an inserter that inserts a pilot signal into the second precoded signal applied with the phase change; and a phase changer that applies a phase change to the second precoded signal applied with the phase change and inserted with the pilot signal. ?? satisfies ?/2 radians<??<? radians or ? radians<??<3?/2 radians. When the communications scheme is an OFDM scheme, the phase changer and the phase changer apply a phase change, and when the communications scheme is a single-carrier scheme, do not apply a phase change.
    Type: Grant
    Filed: June 10, 2019
    Date of Patent: June 22, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Yutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi, Hiroyuki Motozuka
  • Patent number: 11038740
    Abstract: A communication system includes a baseband circuit, a transmitting end circuit, and a receiving end circuit is disclosed. The transmitting end circuit includes a digital analog conversion circuit and a transmitting end filtering circuit. The receiving end circuit includes a receiving end amplifying circuit, a receiving end filtering circuit, and an analog digital conversion circuit. A first data signal is transmitted to the analog digital conversion circuit through the digital analog conversion circuit and the transmitting end filtering circuit, so that the baseband circuit obtains a first compensation parameter. A second data signal is transmitted to the receiving end filtering circuit, the receiving end amplifying circuit and the analog digital conversion circuit through the digital analog conversion circuit and the transmitting end filtering circuit, so that the baseband circuit obtains a second compensation parameter.
    Type: Grant
    Filed: October 15, 2020
    Date of Patent: June 15, 2021
    Assignee: NATIONAL CHIAO TUNG UNIVERSITY
    Inventors: Zheng-Chun Huang, Wei-Che Lee, Hung-Chih Liu, Chih-Wei Jen, Shyh-Jye Jou, Yu-Hwai Tseng
  • Patent number: 11025203
    Abstract: The inventive concept relates to a communication device comprising a DPD processor configured to output a plurality of pre-distorted signals by pre-distorting each of a plurality of input signals using an extracted feedback signal, a first signal combiner configured to combine a plurality of feedback signals corresponding to the plurality of pre-distorted signals and output a combined feedback signal, an analog-to-digital converter configured to convert the combined feedback signal into a digital signal and output a digital-converted combined feedback signal and a signal extractor configured to extract the digital-converted combined feedback signal and output the extracted feedback signal.
    Type: Grant
    Filed: July 31, 2020
    Date of Patent: June 1, 2021
    Assignee: SOLiD, INC.
    Inventors: Kwangnam Seo, Doyoon Kim, Hyoungho Kim, Daesung Baek