Multi-receiver Or Interference Cancellation Patents (Class 375/148)
  • Patent number: 10389476
    Abstract: Methods and devices for PIM-aware link adaptation are disclosed. According to some aspects, a network node and a method for link adaptation that accounts for passive intermodulation (PIM) at the network node of a wireless communication system are disclosed. A PIM power spectral density (PSD) versus the set of receive frequencies is determined based on at least one transmission frequency of a set of transmission frequencies at at least one antenna. Link adaptation is performed based on the PIM PSD versus a set of receive frequencies. Performing the link adaptation includes choosing at least one transmission parameter of a transmitter scheduled to transmit on a frequency among the set of receive frequencies.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: August 20, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Alex Stephenne
  • Patent number: 10382102
    Abstract: A 5G-oriented multidimensional adaptive MIMO system including a transmitting antenna array, a first rotary table, a broadband vector signal generator, a receiving antenna array, a second rotary table, a broadband vector signal analyzer and a data acquisition terminal is provided. The broadband vector signal generator and the broadband vector signal analyzer are respectively connected with the transmitting antenna array and the receiving antenna array. The data acquisition terminal is connected with the broadband vector signal generator and the broadband vector signal analyzer. In addition, a method for adjusting radiating modes of antenna ports by using the 5G-oriented multidimensional adaptive MIMO system is also provided.
    Type: Grant
    Filed: July 17, 2018
    Date of Patent: August 13, 2019
    Assignee: WUHAN UNIVERSITY
    Inventors: Yigang He, Guolong Shi, Hui Zhang, Bing Li, Baiqiang Yin, Liulu He
  • Patent number: 10374701
    Abstract: An optical signal-to-noise ratio (OSNR) measuring device includes a processor, wherein the processor executes a process. The process includes: converting an optical signal to an electrical signal; first acquiring a signal intensity from the electrical signal; second acquiring a noise intensity of a predetermined frequency band from the electrical signal; performing a digital conversion on the noise intensity; and computing an OSNR of the optical signal based on the signal intensity and the converted noise intensity. The predetermined frequency band is a frequency band including a folding noise that occurs when the digital conversion is performed.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: August 6, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Shoichiro Oda, Setsuo Yoshida, Keisuke Harada
  • Patent number: 10367544
    Abstract: Methods and apparatuses are provided for searching for a cell by a communication processor (CP) of a wireless terminal having a plurality of antennas. One of the plurality of antennas is selected based on whether a secondary antenna is in a driving state and whether a finger of a rake receiver has been allocated. The plurality of antennas includes a primary antenna and the secondary antenna. A cell search is performed through the selected one of the plurality of antennas.
    Type: Grant
    Filed: May 6, 2016
    Date of Patent: July 30, 2019
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Dae-Cheol Kwon, Jong-Han Kim, Jae-Hyung Lee
  • Patent number: 10367625
    Abstract: Provided is a method by a first transmitting node transmitting, in cooperation with two other transmitting nodes, radio signals using two radio resource units to three receiving nodes which the respective transmitting nodes serve, the method being performed by the first transmitting node and comprising: establishing, for a first receiving node, a CSI-RS resource and a CSI-IM resource; receiving, from the first receiving node, a first recommended PMI for the first transmitting node according to information measured in the CSI-RS resource and the CSI-IM resource, and receiving, from the remaining two transmitting node, a second recommended PMI for the first transmitting node, which has been reported from the remaining two receiving nodes; and muting at a first wireless resource unit among the two wireless resource units, and transmitting, at the second wireless resource unit, a wireless signal based on the first recommended PMI or the second recommended PMI.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: July 30, 2019
    Assignee: LG ELECTRONICS INC.
    Inventors: Hyunho Lee, Hyukjin Chae, Seungmin Lee
  • Patent number: 10362541
    Abstract: In one implementation, a wireless communication terminal includes a primary antenna array and a first controller configured to steer a main beam of the primary antenna array in a desired direction. The wireless communication terminal also includes an auxiliary antenna array and a second controller configured to control complex weights to be applied by at least some antenna elements of the auxiliary antenna array to corresponding variants of a second signal received by the at least some auxiliary antenna elements. Furthermore, the wireless communication terminal includes at least one signal combiner configured to combine variants of the second signal received from auxiliary antenna elements into an interfering signal that models interference from a co-located wireless communication terminal and subtract the interfering signal from variants of the first signal received from antenna elements of the principal antenna array to produce an interference mitigated signal.
    Type: Grant
    Filed: February 16, 2018
    Date of Patent: July 23, 2019
    Assignee: IRIDIUM SATELLITE LLC
    Inventor: Jeffrey Francis Bull
  • Patent number: 10355812
    Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). A transmission method for multiple access is provided. The transmission method including performing, by a transmitter, channel coding on a bit sequence to determine a coded sequence, performing, by the transmitter, symbol modulation on the coded sequence, performing, by the transmitter, grid mapping on the modulated symbol sequence to determine a mapped sequence, and transmitting the mapped sequence.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: July 16, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Qi Xiong, Bin Yu, Chen Qian, Chengjun Sun
  • Patent number: 10348522
    Abstract: The present invention relates to a device and a method for detecting a transmission signal in a wireless communication system, and a reception device in a wireless communication system comprises: a transceiver for receiving a signal from a transmitting end; a first correlator for performing a first correlation and outputting a real part among the results of the first correlation; a second correlator for performing a second correlation and outputting an imaginary part among the results of the second correlation; and a control unit for controlling the first correlator and the second correlator on the basis of a channel change rate so as to detect a transmission signal.
    Type: Grant
    Filed: April 6, 2016
    Date of Patent: July 9, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yeongsam Kim, Youngkwan Choi, Hayoung Yang, Joohyun Lee
  • Patent number: 10341143
    Abstract: Methods and apparatus of channel estimation using time-domain parameter extraction are disclosed. The wireless channel can be modeled by a multipath model with a limited number of parameters in the continuous time domain. Extracting the time-domain parameters and then reconstructing the channel yields channel estimates that have better accuracy. Time-domain parameter extraction also has lower computational complexity than existing methods.
    Type: Grant
    Filed: December 29, 2016
    Date of Patent: July 2, 2019
    Inventor: Xiao-an Wang
  • Patent number: 10333683
    Abstract: Different Out-of-sync thresholds are defined for Radio Link Monitoring by a UE having a selectively enabled advanced receiver feature. When the advanced receiver feature is disabled, the UE monitors received signal quality and compares a signal quality metric to a first threshold developed for a reference receiver. When the advanced receiver feature is enabled, the UE compares the signal quality metric to a second threshold indicating lower signal quality than the first threshold. In either case, if the signal quality meets the respective threshold, the UE goes Out-of-sync. The Out-of-sync UE continues to monitor received signal quality. Regardless of whether the advanced receiver feature is enabled or not, a third threshold, developed for the reference receiver, is applied to determine when to return to In-sync. In one embodiment, the reference receiver enables two antennas, and the advanced receiver feature is enabling four antennas.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: June 25, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Torgny Palenius, Christopher Callender, Maomao Chen, Fredrik Nordström
  • Patent number: 10305710
    Abstract: The present invention relates to a method for operating, by a base station, multiple modulation schemes in a wireless communication system, the method comprising the steps of: calculating the number of terminals, among the terminals in a cell managed by the base station, of which a channel state is included in a state that is lower than a preset state; reporting information related to the calculated number of terminals to an upstream entity of the base station; receiving information about a band, assigned by the upstream entity, for a hybrid frequency shift keying (FSK) and quadrature amplitude modulation (QAM) (FQAM) scheme on the basis of a QAM scheme and a FSK scheme; and transmitting downwardly the information about the band for the FQAM scheme to the terminals of which a channel state is included in a state that is lower than the preset state. Other modified embodiments on the basis of the technical concept of the present invention are also possible.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: May 28, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Min Sagong, Jeong-Ho Park, Jae-Won Kim, Hyun-Kyu Yu, Chi-Woo Lim, Su-Ryong Jeong, Sung-Nam Hong
  • Patent number: 10290920
    Abstract: A wireless receiver includes an antenna panel divided into a plurality of segments, each segment having a group of antennas, each segment having a set of radio frequency (RF) front end chips. Each RF front end chip is coupled to some antennas in the group of antennas. A master chip is configured to drive in parallel a plurality of control buses. Each control bus is coupled to a respective one of the plurality of segments, where each RF front end chip in the set of RF front end chips is serially coupled to another RF front end chip in the set of RF front end chips. Each control bus carries phase shift signals and amplitude control signals from the master chip to a respective set of RF front end chips in each segment. The master chip and the plurality of segments in the antenna panel are integrated on a single printed circuit board.
    Type: Grant
    Filed: August 2, 2016
    Date of Patent: May 14, 2019
    Assignee: Movandi Corporation
    Inventors: Michael Boers, Farid Shirinfar, Sam Gharavi, Seunghwan Yoon, Alfred Grau Besoli, Maryam Rofougaran, Ahmadreza Rofougaran
  • Patent number: 10237106
    Abstract: Methods and systems are provided that enable an OFDM transmitter to be used for transmitting conventional OFDM or a form of transformed OFDM. A technique is provided for transforming a coded and modulated sequence of samples prior to an IFFT that enables the transformed sequence of samples to be transmitted using conventional OFDM or transformed OFDM. The selection of a transform function for transforming the coded and modulated sequence of samples may be based on optimizing the transform function for particular operating conditions between the transmitter and receiver. In some embodiments of the invention OFDM and time transformed OFDM are multiplexed in time and/or frequency in a transmission frame. In some embodiments of the invention a pilot pattern is provided in which the pilot are sent using OFDM and data is sent using OFDM and/or transformed OFDM.
    Type: Grant
    Filed: October 23, 2017
    Date of Patent: March 19, 2019
    Assignee: Apple Inc.
    Inventors: Jianglei Ma, Wen Tong, Ming Jia, Hua Xu, Peiying Zhu, Hang Zhang
  • Patent number: 10211908
    Abstract: Provided is a multi-antenna relay device. The multi-antenna relay device having first to n-th (n is a natural number of 2 or more) channel formed between receiving antennas and transmitting antennas corresponding to each other, comprising: first to n-th channel interference cancellation units, respectively, included in a corresponding channel among the first to n-th channels and canceling first to n-th channel interference signals corresponding to signals radiated through the first to n-th channels from signal input into the corresponding channel in real time.
    Type: Grant
    Filed: April 9, 2014
    Date of Patent: February 19, 2019
    Assignee: SOLiD, INC.
    Inventor: Hyunchae Kim
  • Patent number: 10193659
    Abstract: The present invention relates to a method and apparatus for channel estimation between a transmitter and a receiver in a wireless communications system.
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: January 29, 2019
    Assignee: Cohda Wireless Pty Ltd.
    Inventor: Paul Dean Alexander
  • Patent number: 10187804
    Abstract: An apparatus and a method for allocating wireless channels are disclosed. For example, the method, by an aggregator, aggregates sensed information received from a plurality of sensing devices, by an analyzer, analyzes the sensed information that is aggregated and determines when an incumbent is not detected based on the analysis, and allocates, by a channel allocator, a wireless channel of the targeted frequency spectrum to a user equipment when the incumbent is not detected.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: January 22, 2019
    Assignee: Intel Corporation
    Inventors: Beeshanga Jayawickrama, Ying He, Markus Dominik Mueck, Biljana Badic, Kilian Roth, Srikathyayani Srikanteswara, Zhibin Yu, Eryk Dutkiewicz
  • Patent number: 10181872
    Abstract: An example method of capacitive sensing includes: receiving at least one code division multiplexed (CDM) signal transmitted from different transmitters using different codes over a plurality of signal bursts, wherein a length of each of the different codes is equal to or greater than a number of the different transmitters; filtering the at least one CDM signal using an impulse response filter, wherein the filtering comprises: accumulating the at least one CDM signal over the plurality of signal bursts to obtain measurements of the at least one CDM signal; and for the measurements of the at least one CDM signal, applying different filter weights to the resulting signals over a number of the plurality of signal bursts that is greater than the length of the different codes.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: January 15, 2019
    Assignee: SYNAPTICS INCORPORATED
    Inventor: Joseph Kurth Reynolds
  • Patent number: 10177830
    Abstract: An array antenna system 3 includes: a transmission unit 14 to which a plurality of pulse signals are given, the pulse signals being obtained by pulse-modulation of digital transmission signals, and including analog transmission signals corresponding to the digital transmission signals, the transmission unit 14 being configured to transmit, as radio signals, the plurality of analog transmission signals included in the plurality of pulse signals; and a plurality of adjustment units 15 configured to perform, for the plurality of pulse signals to be given to the transmission unit 14, an adjustment process for adjusting the relationship of relative phases of the plurality of analog transmission signals included in the plurality of pulse signals.
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: January 8, 2019
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: Takashi Maehata
  • Patent number: 10175945
    Abstract: Systems and methods for improving correlation. In at least one system and method, a signal is received and divided into a plurality of slices. Each of the slices is divided into a plurality of sub-slices. A plurality of chips of a PN code are generated, and sub-slice correlation results are generated in parallel. Summation of the sub-slice correlation results generates a slice correlation results, and the accumulated slice correlation results provide a correlation result.
    Type: Grant
    Filed: April 19, 2017
    Date of Patent: January 8, 2019
    Assignee: NextNav, LLC
    Inventors: Vikram V. Kalkunte, Subramanian S. Meiyappan
  • Patent number: 10177937
    Abstract: The present invention relates to a method and apparatus for adaptive channel estimation for signal-amplitude-based communications systems. In one arrangement, the method comprises: receiving an observation (r) of a transmitted coded symbol (d); generating, with a weight generator, a first coefficient (v) for weighting the received observation based on an estimate of the transmitted coded symbol (d_est), the first coefficient having a magnitude that is invariable with the amplitude of the transmitted coded symbol; and forming a new channel estimate (h_est) based on a weighted observation using the first coefficient (v).
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: January 8, 2019
    Assignee: Cohda Wireless Pty Ltd.
    Inventor: Paul Dean Alexander
  • Patent number: 10158432
    Abstract: A radio frequency (RF) signal separation and suppression system includes an input that couples in a radio frequency signal comprising desired and undesired radio frequency signals. The RF signal separation and suppression system also includes a reproduction generator connected to the input. The reproduction generator produces a reproduction from the radio frequency signal of the undesired signal at an output. The RF signal separation and suppression system also includes an electrical subtractor having a first input that is electrically connected to the output of the reproduction generator and a second input that is electrically connected to the input of the radio frequency signal separation system. An output of the subtractor generates an output radio frequency signal comprising the desired radio frequency signal and a suppressed undesired radio frequency signal.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: December 18, 2018
    Assignee: Photonic Systems, Inc.
    Inventors: Edward I. Ackerman, Charles H. Cox
  • Patent number: 10152457
    Abstract: An apparatus may include a circuit including a filter configured to update one or more adaptive coefficients of the filter based on an error signal. Further, the circuit may update a constrained coefficient of the filter based on the one or more adaptive coefficients, the constrained coefficient and a desired value. Moreover, the circuit may generate a sample of a sample sequence based on the one or more adaptive coefficients and the updated constrained coefficient, the error signal being based on the sample sequence.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: December 11, 2018
    Assignee: Seagate Technology LLC
    Inventors: Jason Vincent Bellorado, Marcus Marrow, Zheng Wu
  • Patent number: 10148315
    Abstract: The present invention relates to a method and a device for adjusting a signal of a receiving device in a mobile communication system and, more specifically, to a method for adjusting a signal of a receiving device in a mobile communication system, the method comprising the steps of: receiving signals from at least two antennas; calculating at least one correlation value by using the received signals; obtaining a delay difference value between the signals based on the at least one calculated correlation value; and outputting adjusted signals generated by adjusting the received signals based on the obtained delay difference value.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: December 4, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jaesang Ham, Hyuncheol Kim, Yusuk Yun
  • Patent number: 10132864
    Abstract: The present disclosure describes a novel method and apparatus for using a device's power and ground terminals as a test and/or debug interface for the device. According to the present disclosure, messages are modulated over DC voltages applied to the power terminals of a device to input test/debug messages to the device and output test/debug messages from the device. The present disclosure advantageously allows a device to be tested and/or debugged without the device having any shared or dedicated test or debug interface terminals.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: November 20, 2018
    Assignee: Texas Instruments Incorporated
    Inventor: Lee D. Whetsel
  • Patent number: 10129071
    Abstract: The present disclosure provides a symbol synchronization method and apparatus. By means of the symbol synchronization method and apparatus, a timing location is adjusted outside an adaptive loop. In addition, the adaptive loop proceeds to according to an original function of the adaptive loop. That is, the timing location is stabilized to an initial symbol-synchronization location, and the timing location is then further corrected and adjusted. Therefore, impact of an error of a timing location on symbol synchronization is eliminated by correcting the timing location, and positioning accuracy of a symbol-synchronization location is improved.
    Type: Grant
    Filed: November 10, 2017
    Date of Patent: November 13, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Xiaodong Li, Qiao Liu
  • Patent number: 10129883
    Abstract: Techniques for spread spectrum wireless over non-contiguous channels are described. In at least some embodiments, a set of channels is selected for wireless communication, with at least some of the channels being non-contiguous (e.g., non-adjacent) from one another. A spreading sequence is selected, such as based on attributes of a selected set of channels. Communication data that is to be transmitted over the set of channels is combined with the spreading sequence to generate a spread spectrum signal. The spread spectrum signal is then divided into multiple sub-signals for transmission over the set of channels.
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: November 13, 2018
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Amer Aref Hassan, Paul William Alexander Mitchell, Paul W. Garnett
  • Patent number: 10117261
    Abstract: A network and method for wireless communications are provided. A first network element in the network may transmit a first reservation signal to reserve a channel. The first reservation signal may at least partially overlap a second reservation signal transmitted by a second network element for channel reservation. The first network element and the second network element share the same channel. The first network element may also perform interference cancellation to cancel the second reservation signal transmitted by the second network element for carrier sensing.
    Type: Grant
    Filed: October 13, 2015
    Date of Patent: October 30, 2018
    Assignee: Futurewei Technologies, Inc.
    Inventors: Jialing Liu, Fei Teng, Zhiyi Zhou, Weimin Xiao
  • Patent number: 10117257
    Abstract: Estimating uplink interference includes determining any wireless devices having available uplink resources, and instructing the wireless devices to estimate and report uplink interference. A method for estimating uplink interference in a wireless network includes determining that a wireless device attached to an access node has available resources within an uplink schedule of the wireless device, and instructing the wireless device to enter a listening mode during the available resources of the uplink schedule. In the listening mode, the wireless device determines a measurement of an uplink interference caused at the wireless device. The method further includes receiving the measurement of the uplink interference from the wireless device via an uplink channel.
    Type: Grant
    Filed: November 18, 2016
    Date of Patent: October 30, 2018
    Assignee: Sprint Spectrum L.P.
    Inventors: Muhammad Ahsan Naim, Luca Zappaterra, Yu Zhou
  • Patent number: 10110294
    Abstract: A method for adaptively disabling receiver diversity is provided. The method can include a wireless communication device determining an active data traffic pattern; defining a threshold channel quality metric based at least in part on a threshold channel quality needed to support a threshold quality of service for the active data traffic pattern; comparing a measured channel quality to the threshold channel quality metric; and disabling receiver diversity in an instance in which the measured channel quality metric satisfies the threshold channel quality metric.
    Type: Grant
    Filed: November 25, 2015
    Date of Patent: October 23, 2018
    Assignee: Apple Inc.
    Inventors: Srinivasan Nimmala, Navid Damji, Tarik Tabet, Li Su, Longda Xing, Zhu Ji
  • Patent number: 10104631
    Abstract: A communications terminal comprises an encoder configured to encode a digital data signal to generate an encoded signal, a scrambler configured to scramble the encoded signal based on a scrambling signature, and a modulator configured to modulate resulting data frames for transmission via a random access communications channel. Each frame comprises a data payload, including a block of the scrambled signal, and a header, including a start of frame (SOF) sequence associated with the scrambling signature. Use of the SOF sequence for each frame provides a synchronization reference and serves to designate the associated scrambling signature for decoding the respective data payload. Use of the SOF sequence for each frame further serves to distinguish between the data frame and data frame(s) originating from further communications terminal(s), transmitted via a common time slot of the channel, for which different scrambling signature(s) were used to scramble respective encoded signal(s) thereof.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: October 16, 2018
    Assignee: Hughes Network Systems, LLC
    Inventors: Lin-Nan Lee, Liping Chen, Victor Liau
  • Patent number: 10090892
    Abstract: An apparatus and a method for detecting data transmitted over a wireless channel are disclosed. For example, for each receive antenna of a plurality of receive antennas, the method converts, by an ADC, an analog signal received by the receive antenna to a respective digital signal, and for each receive antenna of the plurality of receive antennas, the method channel transforms, by a channel transformer, the digital signal to determine a respective equivalent integer representation of the digital signal, and the method detects data by receive combining, by a receive combiner, the respective equivalent integer representations of the digital signals determined for the plurality of receive antennas.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: October 2, 2018
    Assignee: Intel Corporation
    Inventors: Namyoon Lee, Yo-Seb Jeon, Oner Orhan, Shilpa Talwar
  • Patent number: 10075306
    Abstract: An echo detection circuit for a multi-carrier system includes a memory, a threshold generating circuit and an echo determining circuit. The memory stores a plurality of channel impulse response values of the multi-channel system. The channel impulse response values include a target channel impulse response value, a plurality of preceding channel impulse response values and a plurality of subsequent channel impulse response values; a threshold generating circuit, coupled to the memory, generating a threshold corresponding to the target channel impulse response according to the preceding channel impulse response values and the subsequent channel impulse response values; and an echo determining circuit, coupled to the threshold generating circuit and the memory, comparing the target channel impulse response value with the threshold to determine whether the target channel impulse response value corresponds to an echo path of the multi-carrier system.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: September 11, 2018
    Assignee: MSTAR SEMICONDUCTOR, INC.
    Inventors: Kun-Yu Wang, Ko-Yin Lai, Tai-Lai Tung
  • Patent number: 10063295
    Abstract: A method for signal transmission using precoded symbol information involves estimating a two-dimensional model of a communication channel in a delay-Doppler domain. A perturbation vector is determined in a delay-time domain wherein the delay-time domain is related to the delay-Doppler domain by an FFT operation. User symbols are modified based upon the perturbation vector so as to produce perturbed user symbols. A set of Tomlinson-Harashima precoders corresponding to a set of fixed times in the delay-time domain may then be determined using a delay-time model of the communication channel. Precoded user symbols are generated by applying the Tomlinson-Harashima precoders to the perturbed user symbols. A modulated signal is then generated based upon the precoded user symbols and provided for transmission over the communication channel.
    Type: Grant
    Filed: April 3, 2017
    Date of Patent: August 28, 2018
    Inventors: Jim Delfeld, Shlomo Selim Rakib
  • Patent number: 10050663
    Abstract: A method of a UE for canceling a self-interference (SI) signal in a wireless communication system is disclosed. The method comprises the steps of generating a signal related to transmission data by means of a UE operating in a full duplex radio (FDR) mode; transmitting the signal related to transmission data; receiving a signal related to reception data by means of the UE; and canceling the SI signal on the basis of the signal related to transmission data and the signal related to reception data. In this case, a cancellation signal is further generated from the signal related to transmission data on the basis of a previously set value of a power amplifier (PA), and the SI signal is canceled by further reflecting the generated cancellation signal.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: August 14, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Gwanmo Ku, Sangrim Lee, Dongkyu Kim, Sangwook Han
  • Patent number: 10044421
    Abstract: Embodiments herein relate to wireless communication using combined channel training and physical layer header (SIG) signaling. Devices that comply with the 802.11ax or High Efficiency WLAN (HEW) standard may generate and transmit packets that include such combined information. The combined information may be beamformed to a receiver device via an OFDM signal, which may be decoded by the receiver device to obtain subsequent data included in the signal. For example, initial training symbols associated with channel training subcarriers in the signal may be detected and used to perform a rough estimate of the channel. The rough estimate may thereafter be refined using data symbols detected from adjacent data subcarriers using the channel training symbols. In this way, data subcarriers may also be used to determine a channel response along with channel training subcarriers. Channel training information may be transmitted with data, such as user-specific information, in a single symbol.
    Type: Grant
    Filed: December 26, 2014
    Date of Patent: August 7, 2018
    Assignee: Intel IP Corporation
    Inventors: Qinghua Li, Xiaogang Chen, Huaning Niu, Yuan Zhu
  • Patent number: 10044403
    Abstract: An apparatus, a method, a method of manufacturing and apparatus, and a method of constructing an integrated circuit are provided. The apparatus includes a correlator; a buffer connected to the correlator, including a plurality of buffer components; a combiner array, including a plurality of combiners, wherein each of the plurality of combiners includes a plurality of buses, wherein each bus is connected to one buffer component corresponding to a synchronization signal block for each synchronization signal block; and a selector connected to each of the plurality of combiners, where the selector is configured to apply a pre-determined function to the plurality of combiners corresponding to the synchronization signal blocks, determine a maximum of applying the pre-determined function, and determine that a primary spreading sequence (PSS) is detected at a time corresponding to a time associated with the maximum of applying the pre-determined function.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: August 7, 2018
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Bemini Hennadige Janath Peiris, Hongbing Cheng, Jungwon Lee
  • Patent number: 10027367
    Abstract: Various signal processing techniques may benefit from appropriate handling. For example, certain signal processors may benefit from quarter wavelength unit delay and complex weight coefficient continuous-time filters. A method can include splitting an input signal into a plurality of signal paths. The method can also include complex weighting, for each signal path, a respective signal. The method can further include summing outputs of the signal paths. The method can additionally include providing an output comprising the sum of the signal paths. The complex weighting can be configured to independently control gain, phase and delay of the output signal over broadband.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: July 17, 2018
    Assignee: NOKIA SOLUTIONS AND NETWORKS OY
    Inventors: Antti Heiskanen, Eero Koukkari
  • Patent number: 10014892
    Abstract: A communication system (200) is formed of a base station comprising a main base station receiver with a main base station antenna (202) and a secondary receiver with a secondary antenna (212). The secondary receiver detects interference to the main base station antenna (202) causing reduced communications range for communicating with subscriber units (204). The secondary receiver rotates a receiver null (228) of the secondary antenna (212) to reduce the interference in response thereto. The communication system (200) performs a voting decision that selects between the secondary receiver with rotated receiver null and the main base station receiver (104) with reduced communications range, to mitigate the interference to main base station antenna (102).
    Type: Grant
    Filed: July 10, 2017
    Date of Patent: July 3, 2018
    Assignee: MOTOROLA SOLUTIONS, INC.
    Inventors: Arthur Christopher Leyh, Sanjaykumar S. Karpoor, David P. Gurney, Gregory J. Buchwald
  • Patent number: 9989646
    Abstract: Described herein is a receiver for a navigation system, which receives a navigation signal modulated with a pseudorandom sequence along a line-of-sight path and reflected paths. The receiver includes a delay-locked loop, which generates a local sequence, and a first correlator and a second correlator, which operate in open-loop mode and generate a first correlation signal.
    Type: Grant
    Filed: July 29, 2014
    Date of Patent: June 5, 2018
    Assignee: FINMECCANICA—SOCIETÀ PER AZIONI
    Inventors: Davide Margaria, Emanuela Falletti, Francesco Parizzi, Alberto Bagnasco, Augusto Torchi
  • Patent number: 9986541
    Abstract: A method and apparatus for transmitting uplink control information (UCI) for Long Term Evolution-Advanced (LTE-A) using carrier aggregation is disclosed. Methods for UCI transmission in the uplink control channel, uplink shared channel or uplink data channel are disclosed. The methods include transmitting channel quality indicators (CQI), precoding matrix indicators (PMI), rank indicators (RI), hybrid automatic repeat request (HARQ) acknowledgement/non-acknowledgement (ACK/NACK), channel status reports (CQI/PMI/RI), source routing (SR) and sounding reference signals (SRS). In addition, methods for providing flexible configuration in signaling UCI, efficient resource utilization, and support for high volume UCI overhead in LTE-A are disclosed.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: May 29, 2018
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Erdem Bala, Philip J. Pietraski, Sung-Hyuk Shin, Guodong Zhang, Allan Y. Tsai, Joseph S. Levy, Pascal M. Adjakple, John W. Haim, Robert L. Olesen, Kyle Jung-Lin Pan
  • Patent number: 9929887
    Abstract: A system and method for augmenting the data capacity of pre-existing communications channels is provided. In one example, a subcarrier waveform of the system can be dithered based on data generated by an additional source and then transmitted. The dithered subcarrier can be passed through a plurality of matched filters so as to ascertain which dither pattern was used, thus ultimately allowing for the demodulation of the additional data source. The system and methods provided herein can be implemented with minimal impact to legacy users of the system as implementation of the dithering scheme can have minimal impact to the performance of receivers that are not equipped to demodulate the dithered waveforms.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: March 27, 2018
    Assignee: The MITRE Corporation
    Inventor: Brady O'Hanlon
  • Patent number: 9923596
    Abstract: A demodulation apparatus demodulates spectrum-spread received data, and includes a band variable filter removing noise components from despread received data, a power conversion unit converting each sample value of received data after removing noise components to a power value, a cyclic addition unit cyclically adding the power value in bit periods of received data, a maximum-value detection/average-level measurement unit detecting a maximum value from a cyclic-addition result of the cyclic addition unit, an estimation unit estimating a spreading-code timing and a carrier frequency based on maximum-value information detected by the maximum-value detection/average-level measurement unit, a spreading-code generation unit generating a spreading code with a timing according to an estimation result of a spreading-code timing obtained by the estimation unit, and a local-signal generation unit setting a local-signal frequency according to an estimation result of a carrier frequency obtained by the estimation unit.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: March 20, 2018
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Akinori Fujimura
  • Patent number: 9900848
    Abstract: In one implementation, a wireless communication terminal includes a primary antenna array and a first controller configured to steer a main beam of the primary antenna array in a desired direction. The wireless communication terminal also includes an auxiliary antenna array and a second controller configured to control complex weights to be applied by at least some antenna elements of the auxiliary antenna array to corresponding variants of a second signal received by the at least some auxiliary antenna elements. Furthermore, the wireless communication terminal includes at least one signal combiner configured to combine variants of the second signal received from auxiliary antenna elements into an interfering signal that models interference from a co-located wireless communication terminal and subtract the interfering signal from variants of the first signal received from antenna elements of the principal antenna array to produce an interference mitigated signal.
    Type: Grant
    Filed: May 15, 2017
    Date of Patent: February 20, 2018
    Assignee: IRIDIUM SATELLITE LLC
    Inventor: Jeffrey Francis Bull
  • Patent number: 9892740
    Abstract: A speech/audio coding apparatus is provided that includes a receiver that receives a time-domain speech input signal and a processor. The processor transforms a time-domain speech input signal into a frequency-domain spectrum, and divides a frequency region of the spectrum in an extended band into a plurality of bands. The processor also sets a limited band for each divided band in the current frame, when a difference between a first frequency with a first maximum amplitude in a spectrum of the divided band in a preceding frame and a second frequency with a second maximum amplitude in a spectrum of the divided band in a current frame is below a threshold. The processor further encodes the spectrum in the limited band within each divided band in the current frame, and does not encode a spectrum outside the limited band within each divided band in the current frame.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: February 13, 2018
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Takuya Kawashima, Masahiro Oshikiri
  • Patent number: 9883414
    Abstract: There is provided improved backhaul communication in a wireless network. The wireless network comprises at least one coordinating network node. The wireless network further comprises at least one cooperative network node. A method performed by the cooperating network node comprises receiving an uplink signal from a wireless device, the uplink signal comprising data. The method further comprises compressively sampling the data so as to obtain compressive measurements of the data. The method further comprises transmitting the compressively sampled data to the coordinating network node. There is also provided a method performed in the coordinating network node. There is further provided a cooperating network node and a coordinating network node arranged to perform the methods and computer programs and computer program products comprising computer program code for implementing the method.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: January 30, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Jocelyn Aulin, Gary Boudreau
  • Patent number: 9859968
    Abstract: The present invention relates to the signaling of channel quality information in a multi-beam transmission system, wherein a plurality of beams are simultaneously transmitted and a plurality of sets of channel quality information are transmitted for controlling independently the transmission rate on the different beams. Determined are beams with a different quality resulting in different effects of errors in the transmissions of the channel quality information for the beams. Said different effects are exploited for reducing a signaling overhead of the channel quality information for the beams.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: January 2, 2018
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Matthew Peter John Baker, Timothy James Moulsley
  • Patent number: 9847830
    Abstract: The present disclosure describes a method and an apparatus for pruning false peaks during slot synchronization at a user equipment (UE). For example, a method is provided to identify a plurality of first peaks associated with a primary-synchronization channel (P-SCH) received at the UE and a plurality of second peaks from the plurality of first peaks. Further, one or more pruning locations along with associated energy thresholds for each of the plurality of the second peaks may be determined and whether a peak of the plurality of the first peaks is a false peak is identified based on whether the peak is located at one of the one or more pruning locations of the peak and an associated energy value of the peak does not satisfy the associated energy threshold of the pruning location. Furthermore, the peak identified as the false peak is discarded.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: December 19, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Shashank Maiya, Yi Su, Harish Venkatachari, Nate Chizgi
  • Patent number: 9847890
    Abstract: A data processing device includes a control channel model simple estimation apparatus performs control channel simple estimation, which does not include filter processing, a linear prediction apparatus performs linear prediction on a result obtained by the simple estimation, a pilot reconstruction apparatus reconstructs a first estimation result obtained by the linear prediction, a control channel data regeneration apparatus regenerates a pilot part in antenna data of a control channel of the user, and a control channel interference canceller removes the regenerated pilot part from antenna data of multiple users in order to obtain a control parameter part of the antenna data of the control channels of the multiple users.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: December 19, 2017
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Wei Liang
  • Patent number: 9843386
    Abstract: A coded visible light receiver comprises: a sensor, a transform module, and an interference cancelling module. The sensor receives light comprising data modulated into the light according to a coding scheme. The transform module is configured to transform the data into a frequency domain representation, representing a band of a spectrum resulting from the data being modulated into the light according to the coding scheme. The interference cancelling module is configured to cancel interference occurring in the band of the data, by determining one or more components in the band that exceed a threshold signal strength and cancelling those components.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: December 12, 2017
    Assignee: PHILIPS LIGHTING HOLDING B.V.
    Inventors: Constant Paul Marie Jozef Baggen, Paul Henricus Johannes Maria Van Voorthuisenh, Erik Witberg, Hongming Yang
  • Patent number: 9831934
    Abstract: A wireless communication system non-collaborative, multiple input, multiple output (MIMO) space division multiple access (SDMA) system determines subscriber station combining and weighting vectors that yield a high average signal-to-interference plus noise ratio (SINR). Each subscriber station independently transmits information to a base station that allows the base station to determine a weight vector wi for each subscriber station using the determined combining vector of the subscriber station. The ith combining vector corresponds to a right singular vector corresponding to a maximum singular value of a channel matrix between a base station and the ith subscriber station. Each subscriber station transmits signals using a weight vector vi, which corresponds to a left singular vector corresponding to a maximum singular value of a channel matrix between the ith subscriber station and the base station. The base station uses the weight vector wi to determine the signal transmitted by the ith subscriber station.
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: November 28, 2017
    Assignee: Apple Inc.
    Inventors: Jayesh H. Kotecha, Jayakrishnan C. Mundarath