Signal Noise Patents (Class 375/227)
  • Patent number: 11362866
    Abstract: In a transmitter apparatus, a known reference signal is superimposed on top of a data signal that is typically not known a priori to a receiver and the combined signal is transmitted. At a receiver, an iterative channel estimation and equalization technique is used to recover the reference signal and the unknown data signal. In the initial iteration, the known reference signal is recovered by treating the data signal as noise. Subsequent iterations are used to improve estimation of received reference signal and the unknown data signal.
    Type: Grant
    Filed: March 1, 2021
    Date of Patent: June 14, 2022
    Assignee: Cohere Technologies, Inc.
    Inventors: Shachar Kons, Ronny Hadani, Michail Tsatsanis
  • Patent number: 11284308
    Abstract: A medium reservation framework is disclosed for coexistence of coordinated and uncoordinated wireless networks in licensed spectrum and shared spectrum. The proposed medium reservation framework organically takes into account operating regimes with different numbers of Tx/Rx antennas per node, provides flexibility in trading off medium contention aggressiveness and power saving, leverages the inherent synchronization nature of NR, and covers both coordinated and uncoordinated operation scenarios. Various aspects of the medium reservation framework may be centered on one or more combinations of some basic building blocks, such as an operation grid, synchronization signals, and reservation messages, such as a reservation request signal (RRQ) and one or more a reservation response signals (RRS).
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: March 22, 2022
    Assignee: QUALCOMM Incorporated
    Inventors: Ahmed Kamel Sadek, Yisheng Xue, Siddhartha Mallik, Tamer Kadous, Xiaoxia Zhang, Taesang Yoo, Michael Mingxi Fan, Aleksandar Damnjanovic, Yongbin Wei, Jing Sun
  • Patent number: 11239924
    Abstract: A method, apparatus and system for per-channel MER calibration and determination on a multi-channel receiver.
    Type: Grant
    Filed: June 24, 2020
    Date of Patent: February 1, 2022
    Assignee: VIAVI SOLUTIONS INC.
    Inventors: Loren R. Eggert, Daniel K. Chappell
  • Patent number: 11232173
    Abstract: A linear system solving method, system, and computer program product, include calculating a matrix factorization for a matrix in a pair of matrices, in a form of a lower, a diagonal, an upper (LDU) decomposition, solving a first expression for a first value using a substitution module to create a first result, dividing the first result by values stored in the diagonal of the matrix to obtain a second result, and solving a second expression for a second value where a processing of the diagonal is skipped by using the second result.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: January 25, 2022
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Damir Anthony Jamsek, Maysam Mir Ahmadi
  • Patent number: 11229049
    Abstract: A method and apparatus may include receiving configuration signaling from a network node to use a resource pool. The apparatus transmits using contention-based transmission. The method also includes selecting a preamble zone combination from the resource pool. The method may also include transmitting a preamble to the network node using the selected preamble zone combination. A preamble sequence index is used to identify the user equipment.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: January 18, 2022
    Assignee: NOKIA TECHNOLOGIES OY
    Inventors: Hongchao Li, Klaus Ingemann Pedersen, Yuantao Zhang, Jingyuan Sun, Zhuyan Zhao, Deshan Miao
  • Patent number: 11223418
    Abstract: Systems and methods for operating a multi-band satellite terminal are disclosed. One aspect disclosed features a method, comprising: controlling a multi-band satellite terminal capable of receiving signals on a plurality of frequency bands to receive a signal transmitted by a satellite on a first frequency band of the plurality of frequency bands; determining link conditions of the first frequency band based on the received signal; generating an estimate of link conditions of a second frequency band of the plurality of frequency bands, wherein the estimate is generated based on the link conditions of the first frequency band; selecting the second frequency band based on the estimate of the link conditions of the second frequency band; and controlling the multi-band satellite ground terminal to receive the signal transmitted by the satellite on the second frequency band.
    Type: Grant
    Filed: December 31, 2019
    Date of Patent: January 11, 2022
    Assignee: HUGHES NETWORK SYSTEMS, LLC
    Inventors: Tayyab Khan, Krishna Samavedam, George Choquette
  • Patent number: 11201639
    Abstract: Cable network test instruments are disclosed. The test instruments are configured to collect signal data at a node from a cable network system and analyze the collected data to determine whether intermittent noise is present. Methods of locating intermittent noise are also disclosed.
    Type: Grant
    Filed: July 2, 2020
    Date of Patent: December 14, 2021
    Assignee: VIAVI SOLUTIONS INC.
    Inventors: Cinna Soltanpur, Brian Swanson
  • Patent number: 11184264
    Abstract: An error rate test method is disclosed. The error rate test method comprises the following steps. At least one test signal with a predetermined frequency is received from at least one device under test. A symbol sequence comprised in the at least one test signal is determined. At least one error quantity being associated with the at least one device under test and the at least one test signal is determined based on the determined symbol sequence, wherein the at least one error quantity determined is indicative of a rate of erroneous symbols comprised in the symbol sequence. Respective error quantities are determined simultaneously for at least one of multiple devices under test and for multiple different predetermined frequencies. Further, a test system for testing a device under test is disclosed.
    Type: Grant
    Filed: February 21, 2020
    Date of Patent: November 23, 2021
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Niels Petrovic, Meik Kottkamp, Bledar Karajani
  • Patent number: 11146309
    Abstract: The power line communication device detects inverter noise from the voltage waveforms of the power line, and executes the output of the transmission signal in a period in which it is determined that the signal amplitude of the transmission signal in the transmission processing unit exceeds a predetermined value from the output amplitude of the inverter noise, and stops the output of the transmission signal in other periods.
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: October 12, 2021
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Kosuke Shibuya, Yoshitaka Shibuya
  • Patent number: 11099256
    Abstract: A device for processing radar signals is suggested, the device comprising: (i) a memory, which is arranged to store radar data and (ii) an accessor comprising a DMA engine, wherein the accessor is arranged to access data of the memory via the DMA engine, to filter the accessed data, and to forward the filtered data.
    Type: Grant
    Filed: June 6, 2018
    Date of Patent: August 24, 2021
    Assignee: Infineon Technologies AG
    Inventors: Andre Roger, Christian Schmid, Romain Ygnace
  • Patent number: 11082987
    Abstract: Disclosed are a wireless communication method and a wireless communication device. Provided is a resource management device, comprising one or a plurality of processors, said processor or processors being configured to: obtain interference information from another resource management device, said interference information comprising mutual interference between a plurality of managed systems managed by the resource management device, and interference of a plurality of managed systems by one or a plurality of non-managed systems not managed by the resource management device; determine a communication resource for each managed system on the basis of the obtained interference information; and notify a corresponding managed system of the determined communication resource.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: August 3, 2021
    Assignee: SONY CORPORATION
    Inventors: Chen Sun, Xin Guo
  • Patent number: 10999805
    Abstract: The present disclosure relates to methods for determining a first-link transmit power. One example method includes receiving, by a first user equipment (UE), first indication information, where the first indication information comprises indication information of a first maximum transmit power of a second UE, and determining, by the first UE, the first-link transmit power based on the first indication information, where the first link is a link between the first UE and the second UE.
    Type: Grant
    Filed: July 29, 2020
    Date of Patent: May 4, 2021
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Chao Li, Xingwei Zhang
  • Patent number: 10977373
    Abstract: An evaluation device for evaluating security of an electronic control system in which a plurality of electronic control units are connected to a bus used for communication includes a recording medium that holds attack procedure information indicative of contents and a transmission order of a plurality of frames, a transmitter that transmits the plurality of frames to the bus in the transmission order indicated by the attack procedure information, a monitor that monitors an actuator unit controlled by any of the plurality of electronic control units, and an evaluator that makes the evaluation on basis of a monitoring result obtained by the monitor when the transmitter transmits the plurality of frames to the bus.
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: April 13, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Toshihisa Nakano, Jun Anzai, Tohru Wakabayashi, Kimio Minami
  • Patent number: 10965359
    Abstract: Provided is a method of operating a wireless communication device including a phased array including a first antenna group and a second antenna group to form a beam for transmitting and receiving signals polarized in different directions, which includes receiving first signals polarized in a first direction; receiving second signals polarized in a second direction; measuring power of the first signals and power of the second signals; analyzing a relationship between a channel corresponding to the first receiving beam and a channel corresponding to the second receiving beam; estimating power of third signals that are expected to be received through the first antenna group and power of fourth signals that are expected to be received through the second antenna group; and selecting a receiving beam pattern for wireless communication.
    Type: Grant
    Filed: February 19, 2020
    Date of Patent: March 30, 2021
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joontae Kim, Junho Lee, Sungyoon Cho
  • Patent number: 10924304
    Abstract: A method for decoding a signal. The method comprises decoding a received signal according to a predetermined decoding scheme and obtaining an estimate of a transmission signal based on the decoding result; obtaining an estimate of channel noise by using the correlation of channel noise; generating a modified received signal by subtracting the obtained estimate of channel noise from the received signal; and decoding the modified received signal to obtain a decoded signal according to the predetermined decoding scheme.
    Type: Grant
    Filed: August 28, 2017
    Date of Patent: February 16, 2021
    Assignee: UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
    Inventors: Cong Shen, Fei Liang, Feng Wu
  • Patent number: 10911602
    Abstract: A method for selection of a digital subscriber line (DSL) technology for use by a first DSL transceiver in transferring data over a communications line between the first DSL transceiver and a second DSL transceiver. For the selection, an indication of attenuation in the communications line between the DSL transceivers is obtained and a DSL technology for use by the first DSL transceiver is selected from a plurality of DSL technologies supported by the first DSL transceiver. Selection of the DSL technology is determined on the basis of the indication of attenuation. Optionally, selection of the DSL technology may, in addition, be based on other parameters comprising an indication of the power spectral density mask limiting the power output onto the line by the DSL transceiver; an indication of the noise environment of the communications line; an indication of the highest discrete multitone modulation tone transmitted by the first DSL transceiver over the communications line.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: February 2, 2021
    Assignee: BRITISH TELECOMMUNICATIONS public limited company
    Inventors: Ian E Horsley, Andrew D Wallace, Trevor P Linney
  • Patent number: 10868631
    Abstract: The present invention relates to a construction method of a mode-division multiplexing fiber-optic communication system, which includes following contents: converting multiple-input optical signals into optical propagation modes supported by a graded-index ring-core optical fiber at a transmitting end, after being multiplexed by a mode multiplexer, injecting the optical signals into the graded-index ring-core optical fiber for transmission; using a mode de-multiplexer to separate optical signals of different mode groups at a receiving end firstly; and for the separation of internal modes of the same mode group, adopting a multi-channel reception and a digital signal processing method based on a multiple-input multiple-output equalization for processing: for the separation of modes in a base mode group and a high-order mode group, using a digital signal processing algorithm including a 2×2 multiple-input multiple-output equalization and a digital signal processing algorithm including a 4×4 multiple-input multi
    Type: Grant
    Filed: May 18, 2017
    Date of Patent: December 15, 2020
    Assignee: SUN YAT-SEN UNIVERSITY
    Inventors: Jie Liu, Guoxuan Zhu, Xiong Wu, Yujie Chen, Jiangbo Zhu, Siyuan Yu
  • Patent number: 10819302
    Abstract: A communication system including an analog front end and an automatic gain controller. The analog front end includes at least one amplifier for amplifying a received analog signal and an analog to digital converter that converts the analog signal to digital samples. The automatic gain controller includes comparator circuitry, counter circuitry, and a gain controller. The comparator circuitry compares each of the digital samples with an upper threshold and a lower threshold. The counter circuitry counts a high count number of the digital samples having magnitudes that are greater than the upper threshold during each count window and counts a low count number of the digital samples having magnitudes that are less than the lower threshold during the count window. The gain controller adjusts a gain of the at least one amplifier by an amount based on the high count number and the low count number.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: October 27, 2020
    Assignee: NXP B.V.
    Inventors: Radha Srinivasan, Brima Babatunde Ibrahim, Edward Youssoufian
  • Patent number: 10813029
    Abstract: Methods, computer program products, and systems are presented. The method computer program products, and systems can include, for instance: examining one or more parameter characterizing a prospective connection of the mobile airborne article to first through Nth base stations, the one or more parameter including a Doppler shift; determining based on the examining that a criterion is satisfied, the criterion having one or more factor; and initiating handoff of the mobile airborne article to one of the first through Nth base stations based on the determining.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: October 20, 2020
    Assignee: PERSPECTA LABS INC.
    Inventors: Anthony A. Triolo, Achilles Kogiantis, Kiran M. Rege
  • Patent number: 10735857
    Abstract: A method includes receiving sound by a first audio unit installed in an electrical outlet, routing audio data corresponding to the received sound from the first audio unit to a second audio unit installed in a second electrical outlet, and sending the audio data to a mobile device using a wireless link between the mobile device and the second audio unit. Routing the audio data may include receiving the audio data from the first audio unit by a third audio unit and routing the audio data to the second audio unit by the third audio unit serving as a router. The data may be routed using table driven routing, on-demand routing or some other appropriate routing protocol. The method may also include performing voice recognition on the audio data and detecting a command word and routing command word data to the second audio unit.
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: August 4, 2020
    Assignee: GOOGLE TECHNOLOGY HOLDINGS LLC
    Inventors: Michael J. Lombardi, Mitul R. Patel, Amber M. Pierce
  • Patent number: 10715212
    Abstract: Cable network test instruments are disclosed. The test instruments are configured to collect signal data at a node from a cable network system and analyze the collected data to determine whether intermittent noise is present. Methods of locating intermittent noise are also disclosed.
    Type: Grant
    Filed: May 9, 2019
    Date of Patent: July 14, 2020
    Assignee: VIAVI SOLUTIONS INC.
    Inventors: Cinna Soltanpur, Brian Swanson
  • Patent number: 10680723
    Abstract: A measuring device comprising a channel simulator is provided. The channel simulator is adapted to simulate multipath propagation by modifying a first measuring signal, using a plurality of taps defined by tap parameters, resulting in a second measuring signal. The measuring device moreover comprises a parameter modifier, adapted to modify input tap parameters, resulting in the tap parameters.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: June 9, 2020
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventor: Stefan Schmidt
  • Patent number: 10601612
    Abstract: The present disclosure relates to methods, a device and a system for evaluation of channel estimate. One method is performed in a first access point arranged to communicate with one or more wireless devices through information streams that are created using multiple co-located antennas. The method comprises transmitting or receiving a packet A, to/from, the first wireless device, wherein the packet A is transmitted using a precoder determined using the channel estimate, retrieving information about possibly interfering transmissions C between further access points in the vicinity of the first access point, and respective second wireless devices; wherein the information comprises location information and timing information related to the possibly interfering transmissions, determining spatial separations between the transmissions A and C and evaluating the channel estimate, based on the determined spatial separations.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: March 24, 2020
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Dzevdan Kapetanovic, Rocco Di Taranto
  • Patent number: 10601463
    Abstract: Methods and systems are provided for telephone line access with crosstalk stability. A transceiver device coupled to a telephone line, bundled with other telephone lines in a telephone cable, may determine when another transceiver device connected to the telephone cable is estimating signal to noise ratio on another telephone line in the telephone cable, and may control communications over on the telephone line, the controlling including forcing a transmission on the telephone line based on the estimation of signal to noise ratio by the other transceiver device. The transmission may be forced on the telephone line when there is no data to send on the telephone line at a time when the other transceiver device estimates the signal to noise ratio. The forced transmission may be generated by modulating sub-carriers using a pseudo-random sequence generated with an initial seed different from initial seeds used by other transceiver devices.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: March 24, 2020
    Assignee: MAXLINEAR ASIA SINGAPORE PRIVATE LIMITED
    Inventors: Antonio Salas Moreno, Ignacio Cardama Sierra, Agustin Badenes Corella, Antonio Jimenez de Parga Bernal
  • Patent number: 10591319
    Abstract: The invention relates to a method for counting revolutions of a wheel (6) to which a target (7) is attached, the counting method comprising the step of: generating an oscillating signal representing the presence or the absence of the target (7); comparing an amplitude of the signal with a voltage threshold in order to obtain pulses (19); and detecting the presence of the target (7) or the absence of the target on the basis of the number of pulses obtained. The method also comprises a step of detecting a disruption which is implemented as feedback and which consists in acquiring differential pulse values each equal to a difference between two numbers of pulses obtained during two consecutive detection intervals, and in detecting a disruption upon identifying an erroneous sequence of consecutive differential pulses. A consumption meter and a computer program corresponding to the method and means for storing such a program are also claimed.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: March 17, 2020
    Assignee: SAGEMCOM ENERGY & TELECOM SAS
    Inventor: Henri Teboulle
  • Patent number: 10587435
    Abstract: A technique for determining channel coefficients for a first array of antennas coupled through respective first phase shifters to a first radio chain and a second array of antennas coupled through respective second phase shifters to a second radio chain is described. As to a method aspect of the technique, pairs of first and second phase vectors are applied to the first and second phase shifters, respectively. Each of the pairs defines complementary directional gains at the first and second arrays for receiving reference signals. A channel estimation is performed in each of the first and second radio chains for each of the pairs based on the received reference signals. Based on the channel estimations for each of the pairs, at least one channel coefficient for the antennas in each of the first and second arrays is determined.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: March 10, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Wanlu Sun, Stefano Sorrentino
  • Patent number: 10523478
    Abstract: A radio frequency (RF) transmitter includes a set of input ports to receive baseband samples of a signal to be transmitted on a set of disjoint frequency bands, a set of filter banks, there is one filter bank for each input port, each filter bank includes a plurality of digital polyphase interpolation filters to sample a shifted phase of the corresponding sequence of baseband samples and to interpolate the sampled phases to produce a plurality of sequences of interpolated baseband phased samples with the shifted phase, and a set of oscillators banks, each oscillator bank includes a plurality of polyphase Digital Direct Synthesizer (DDS) corresponding to the plurality of digital polyphase interpolation filters to generate a plurality of sequences of samples of digital waveform.
    Type: Grant
    Filed: December 12, 2018
    Date of Patent: December 31, 2019
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Rui Ma, Daniel Antonio Da Costa Dinis, Yukimasa Nagai
  • Patent number: 10462675
    Abstract: An eNodeB uses a first portion of a frequency spectrum as a primary cell and uses a second portion of the frequency spectrum as a secondary cell that is dynamically shared with a 5G base station. The eNodeB and the 5G base station communicate to dynamically share the second portion of the frequency spectrum.
    Type: Grant
    Filed: March 6, 2016
    Date of Patent: October 29, 2019
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Arunabha Gosh, David R. Wolter
  • Patent number: 10454571
    Abstract: Dynamic determination of threshold power level for use in distinguishing between downlink and uplink periods in time-division duplexed (TDD) communications. For example, downlink and uplink periods may be distinguished in TDD communications in a distributed communications system (DCS), such as a distributed antenna system (DAS). Detecting a power level in a TDD communications signal less than the threshold power level is used to identify uplink periods in the TDD communications signal. In this manner, TDD communications circuits involved with transmitting TDD communications signals can synchronize their transmission circuitry to only transmit downlink TDD communications signals in downlink periods and receive uplink TDD communications signals in uplink periods.
    Type: Grant
    Filed: July 20, 2017
    Date of Patent: October 22, 2019
    Assignee: Corning Optical Communications LLC
    Inventors: Amit Gutman, Guy Lupescu
  • Patent number: 10368365
    Abstract: Methods, systems, and devices for wireless communication are described that support time mask techniques for shortened transmission time intervals (sTTIs) that may enhance low latency communications. Time masks may be identified and applied for transmissions that use sTTIs, in a manner that provides increased portions of sTTI durations having higher transmission power, and thus increase the likelihood of successful reception of such transmissions at a receiver. In some cases, a transmitter, such as a user equipment (UE), may identify one or more sTTIs for transmissions of a first wireless service (e.g., an ultra-reliable low-latency communication (URLLC) service). An sTTI may be identified based on a duration of a TTI associated with the first wireless service being below a threshold duration (e.g., a TTI duration of less than 1 ms may be identified as an sTTI).
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: July 30, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Prashanth Akula, Seyedkianoush Hosseini, Wanshi Chen, Amir Farajidana
  • Patent number: 10367665
    Abstract: A radio analyzer includes a memory configured to store a first reference signal, and a processor coupled to the memory and configured to calculate a first correlation value between a received wave and a non-modulated wave, calculate a second correlation value between the received wave and the first reference signal in a target section of the received wave, the first correlation value being smaller than a first threshold value in the target section, and detect a modulated wave from the received wave based on the second correlation value.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: July 30, 2019
    Assignee: FUJITSU LIMTED
    Inventors: Tatsuya Kikuzuki, Teruhisa Ninomiya
  • Patent number: 10361797
    Abstract: A wireless radio tester for testing a device under test is provided. The wireless radio tester comprises a generation unit for transmitting a transmit waveform to the device under test, a measurement unit for receiving and analyzing a receive signal received from the device under test, a processing unit for triggering the measurement unit by interframe space marker information, and a IQ data memory configured to provide IQ data for the generation unit in order to form the transmit waveform. In this context, said IQ data comprises an interframe space marker according to the interframe space marker information.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: July 23, 2019
    Assignee: ROHDE & SCHWARZ GMBH & CO. KG
    Inventor: Ralph Spitschka
  • Patent number: 10356736
    Abstract: A circuit arrangement may include an analog-to-digital-converter (ADC) configured to convert an analog signal into a digitized signal having an ADC frequency, a decimation circuit configured to provide a first signal having a sampling frequency based on the digitized radio signal having the ADC frequency. The sampling frequency is smaller than the ADC frequency. The circuit arrangement may further include a timer circuit providing a second signal having a timer frequency and a timing control signal to control the timing of the decimation circuit, and a difference determination circuit configured to determine a phase difference between the second signal and the first signal.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: July 16, 2019
    Assignee: Intel IP Corporation
    Inventors: Steffen Reinhardt, Peter Bode
  • Patent number: 10355762
    Abstract: A wireless communication system includes a controller to control a plurality of antenna subarrays of a first wireless communication device to form a plurality of directional beams to communicate a beamformed diversity wireless transmission between the first wireless communication device and a set of second wireless communication devices over a plurality of communication channels. The controller assigns at least some antenna subarrays to at least some second wireless communication devices using a greedy optimization with a relaxation parameter and controls the plurality of antenna subarrays according to the assignment.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: July 16, 2019
    Assignee: Mitsubishi Electric Research Laboratories, Inc
    Inventors: Kyeong Jin Kim, Philip Orlik
  • Patent number: 10333687
    Abstract: Disclosed are a method and apparatus for interference alignment based on codebook design and selection. The method includes: a codebook set including codebooks of different sizes of a precoding matrix is pre-designed or pre-stored; a receiver or a transmitter selects a codebook satisfying a specified condition from the codebook set to explicitly or implicitly notify the opposite end; the receiver designs, based on obtained ideal CSI and an interference alignment condition, a precoding matrix V and a receiving matrix U for interference alignment; the receiver selects a matrix V? having the highest similarity to V from the current codebook to serve as a finally quantized precoding matrix V?; the receiver calculates, based on V?, U again to obtain a receiving matrix U? according to the interference alignment condition; and the transmitter transmits a signal according to feedback information and V?, and the receiver filters the signal according to U?.
    Type: Grant
    Filed: October 20, 2014
    Date of Patent: June 25, 2019
    Assignee: ZTE Corporation
    Inventors: Chaowei Wang, Chen Huang, Cheng Wang, Nan Li, Mingxia Cao, Tian Cai, Yihuai Zhang
  • Patent number: 10334466
    Abstract: A network device includes: a transceiving module, configured to: send control information to a target terminal to instruct the target terminal to measure a first spectrum, where the first spectrum is an unlicensed spectrum for the network device; and receive feedback information that is reported by the target terminal and obtained by measuring the first spectrum; and a processing module, configured to determine, according to the feedback information received by the transceiving module, whether the first spectrum is free.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: June 25, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Lili Zhang
  • Patent number: 10333660
    Abstract: A method is implemented by a first radio node (30) for determining a rate at which units of data are received erroneously from one or more second radio nodes. The method comprises inspecting (110) data units received from the one or more second radio nodes for errors. The method also includes making (120) successive determinations of the rate at which data units are received erroneously from the one or more second radio nodes. Each determination must be made based on inspecting at least a minimum number of received data units for errors. The method further entails adapting (130) the minimum number of data units that must be inspected across determinations of different rates, such that determinations of different rates must be respectively made based on inspecting different minimum numbers of received data units for errors.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: June 25, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Muhammad Kazmi, Iana Siomina
  • Patent number: 10263682
    Abstract: The present disclosure generally discloses a channel state prediction capability. In a communication system including a transmitter and a receiver communicating via a communication channel, the channel state prediction capability may enable the transmitter to transmit to the receiver via the communication channel based on a predicted channel state of the communication channel. The predicted channel state may be a prediction of the channel state at a future time at which data transmitted by the transmitter is expected to be received by the receiver, which may be based on a total round trip latency of the communication channel. The predicted channel state may include one or more parameters (e.g., a predicted channel quality indicator, a predicted rank indicator, or the like). The predicted channel state may be predicted based on predictions of channel state factors which may impact the channel state of the communication channel (e.g., path loss, shadow fading, fast fading, or the like).
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: April 16, 2019
    Assignee: Nokia of America Corporation
    Inventor: Ashok Rudrapatna
  • Patent number: 10236944
    Abstract: One or more communication channels may be setup for communicating between a first transceiver from a plurality of transceivers in a transportation object and a network transceiver of a communication network that is in proximity to the transportation object. Channel related data may be determined for the first transceiver; and the determined channel related data may be determined to a second transceiver that is determined to come within communication range of the network transceiver due to movement of the transportation object. The channel related data may then be used for communicating via the one or more communication channels with the second transceiver. Cooperative communication schemes may be used when communication via the one or more communication channels. The cooperative communication schemes may comprise use of one or both of spatial diversity and spatial multiplexing.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: March 19, 2019
    Assignee: SWISSCOM AG
    Inventor: Thomas Zasowski
  • Patent number: 10237838
    Abstract: A method for improving the accuracy of synchronization between base stations even when the propagation path condition between the base stations is poor or when noises are large is provided. A base station (100) according to the present invention includes a communication unit (10) configured to receive a first reference signal transmitted from a first base station (101) and a second reference signal transmitted from a communication device (102) different from the first base station (101), and an execution unit (20) configured to obtain synchronization between the base station (100) and the first base station (101) based on the first and second reference signals.
    Type: Grant
    Filed: July 14, 2015
    Date of Patent: March 19, 2019
    Assignee: NEC CORPORATION
    Inventor: Tomozou Tanaka
  • Patent number: 10187232
    Abstract: A radio frequency (RF) transmitter includes a set of input ports to receive baseband samples of a signal to be transmitted on a set of disjoint frequency bands, a set of filter banks, there is one filter bank for each input port, each filter bank includes a plurality of digital polyphase interpolation filters to sample a shifted phase of the corresponding sequence of baseband samples and to interpolate the sampled phases to produce a plurality of sequences of interpolated baseband phased samples with the shifted phase, and a set of oscillators banks, each oscillator bank includes a plurality of polyphase Digital Direct Synthesizer (DDS) corresponding to the plurality of digital polyphase interpolation filters to generate a plurality of sequences of samples of digital waveform.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: January 22, 2019
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Rui Ma, Daniel Antonio Da Costa Dinis, Koon Hoo Teo, Philip Orlik
  • Patent number: 10177939
    Abstract: A base station includes a channel estimator, a scheduler, and a controller. The channel estimator estimates a channel matrix with respect to each of a plurality of terminals. The scheduler determines a transmission weight corresponding to each of the plurality of terminals on the basis of the channel matrix that is estimated by the channel estimator such that the transmission weight is orthogonal to a current channel matrix and a past channel matrix of a terminal that is a subject of interference. The controller controls, when the transmission weight is determined by the scheduler, the number of samples of the current channel matrix and the past channel matrix to which the transmission weight is to be orthogonal with respect to each of the terminals.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: January 8, 2019
    Assignee: FUJITSU LIMITED
    Inventor: Takashi Seyama
  • Patent number: 10164727
    Abstract: A method for allocating time slots of a shared schedule for a plurality of communication lines having a crosstalk relationship is described. A first number of allocated time slots is allocated, according to respective priorities, corresponding to a first time interval for first data to be transmitted. The first data is transmitted. A second number of allocated time slots is allocated, corresponding to a second time interval for second data to be transmitted. The second number is larger than the first number if an allocation increase threshold has been met, based on utilization of a first time slot having a lowest priority of the first number of allocated time slots. The second number is smaller than the first number if an allocation decrease threshold has been met, based on utilization of a second time slot having a higher priority than the first time slot.
    Type: Grant
    Filed: February 11, 2016
    Date of Patent: December 25, 2018
    Assignee: Marvell International Ltd.
    Inventors: Agustin Badenes Corella, Feliciano Gomez Martinez
  • Patent number: 10153544
    Abstract: An electronic device and a protective housing are described. The electronic device has a housing body that includes a plurality of first component units and a plurality of second component units. The first component units include a first metal material, and the second component units are composed of a second isolation material and a second metal material. The plurality of first component units are arranged in a predetermined shape; the plurality of second component units are arranged at an outer edge of the predetermined shape, and the second metal material of the plurality of second component units is not connected with the first metal material of the first component units. The plurality of first component units constitute a radiating body of an antenna of the electronic device which may have an arbitrary shape, so freedom to set the antenna is raised.
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: December 11, 2018
    Assignees: BEIJING LENOVO SOFTWARE LTD, LENOVO (BEIJING) CO., LTD.
    Inventors: Hua Zhang, Aiguo Zhang, Zhishan Ye
  • Patent number: 10142040
    Abstract: An apparatus for reducing an amplitude imbalance and a phase imbalance between an in-phase signal and a quadrature signal is provided. The in-phase signal and the quadrature signal are based on a radio frequency receive signal. The apparatus includes an imbalance estimation module configured to generate a first correction signal related to a first phase shift, and to generate a second correction signal related to a second phase shift. Further, the apparatus includes a first digital-to-time converter configured to receive the first correction signal and a local oscillator signal. The first digital-to-time converter is further configured to supply a first replica of the local oscillator signal for a first mixer generating the in-phase signal, wherein the first replica of the local oscillator signal has the first phase shift with respect to the local oscillator signal.
    Type: Grant
    Filed: November 11, 2016
    Date of Patent: November 27, 2018
    Assignee: Intel IP Corporation
    Inventors: Victor Da Fonte Dias, Giuseppe Li Puma
  • Patent number: 10141977
    Abstract: Methods and devices are provided wherein a signal sent on a special operation channel is modified by an identification of a line.
    Type: Grant
    Filed: May 13, 2014
    Date of Patent: November 27, 2018
    Assignee: Lantiq Deutschland GmbH
    Inventors: Vladimir Oksman, Rainer Strobel
  • Patent number: 10129059
    Abstract: A multi-amplitude modulation receiver includes a signal coupler block coupled to a mixer array block receiving a first input signal from the signal coupler block and a second input from a LO circuit that provides N overlapping phase signals. Outputs of the N mixer elements are coupled to a baseband filter (BBF) block then to a decision threshold block including decision threshold elements including a signal input and at least one comparator receiving at least one VTH value. A phase ordering and mapper block selects M out of the N phases. A digital logic and control block is coupled to control a filter gain and corner frequency of the BBF block and control the VTH value for the decision threshold block which compares a signal received to the VTH value. Outputs from the decision threshold block are coupled inputs of an M-input decision combiner which provides a single data output.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: November 13, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Sudipto Chakraborty, Vinod Mukundagiri
  • Patent number: 10129027
    Abstract: A Security Alerting System is provided with dynamic buffer size adaptation. An alert message from a Security Alerting System is transmitted by obtaining the alert message from the Security Alerting System; authenticating the alert message using a secret key known by a server; storing the authenticated alert message in a buffer; transmitting the buffer to the server; and detecting a truncation attack based on generating different cryptographic keys for protection of inserted messages and transmitted buffers, wherein the cryptographic keys for protection of inserted messages are generated in a forward-secure manner in a same order that the messages are inserted in the buffer and wherein the cryptographic keys for protection of transmitted buffers are generated in a forward-secure manner in a same order that the buffers are transmitted over a network.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: November 13, 2018
    Assignee: EMC IP Holding Company LLC
    Inventors: Ari Juels, Nikolaos Triandopoulos, Kevin D. Bowers
  • Patent number: 10103903
    Abstract: A method and system for maximizing throughput and minimizing latency in a communication system that supports heterogeneous links is presented. The communication system supports a primary link and an alternate link, and the method and system leverage the alternate link to reduce the overhead transmitted over the primary link, thereby increasing throughput and reducing end-to-end latency. The higher latency alternate link provides a delayed version of an information signal that corresponds to a portion of the information signal that is transmitted on the primary link. The received samples from the primary and alternate links may be used to equalize subsequent portions of the information signal received over the primary link, and may also be used for synchronization, timing recovery, DC offset removal, I/Q imbalance compensation, and frequency-offset estimation.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: October 16, 2018
    Assignee: TRELLISWARE TECHNOLOGIES, INC.
    Inventors: Marcus T. Urie, Ryan P. McCourt, Cenk Köse, Keith M. Chugg
  • Patent number: 10098003
    Abstract: An access node, a communication device, methods performed thereby and a computer readable storage medium for carrier hopping are provided. A method of carrier hopping for an access node of a wireless communication network is provided. The access node operates on a first carrier in an unlicensed band. The method comprises: determining whether a hopping triggering condition is satisfied; and in response to determining that the hopping triggering condition is satisfied, activating a carrier hopping procedure to a second different carrier in the unlicensed band.
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: October 9, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Gen Li, Jinhua Liu, Zhan Zhang