Feedback, Receiver To Transmitter Patents (Class 375/358)
  • Patent number: 10742998
    Abstract: Systems and methods are introduced for rate control of data transmissions in a wireless camera system. In an illustrative embodiment, a computing system selects primary data rates and corresponding fallback data rates to use for transmission of video data. The computing system selects the data rates that provides high-throughput without resulting in wasted energy from retransmissions. The selection may be based upon transmission conditions as well as the record of past data rates, the number of attempts for the data rates, and whether they were successful. These data may be stored as a state machine or for machine learning analysis. Finally, the video data may be aggregated prior to transmission to reduce overhead and improve efficiency.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: August 11, 2020
    Assignee: NETGEAR, INC.
    Inventors: Joseph Amalan Arul Emmanuel, Peiman Amini
  • Patent number: 10715305
    Abstract: An image forming apparatus includes a wireless communication portion, a transmission processing portion, a decoding processing portion, a change processing portion, and a retransmission processing portion. The wireless communication portion has a storage portion that stores member data regarding a replacement member. The transmission processing portion is configured to transmit a transmission request for transmitting the member data to the wireless communication portion. The decoding processing portion is configured to decode a response signal including the member data and transmitted from the wireless communication portion in response to the transmission request. The change processing portion is configured to change a decoding timing of the response signal when it has been determined that reception of the member data has failed. The retransmission processing portion is configured to retransmit the transmission request to the wireless communication portion after the decoding timing has been changed.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: July 14, 2020
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Kaori Kitayama
  • Patent number: 10516464
    Abstract: The present disclosure provides a method and an apparatus for receiving Channel Quality Indication (CQI) information, as well as a method and an apparatus for transmitting CQI information. The method for receiving CQI information includes: transmitting a higher layer configuration signaling message to a terminal; and receiving CQI information from the terminal. The CQI information is determined based on a CQI table obtained based on the higher layer configuration signaling message. With the above solutions, higher data transmission reliability and lower data transmission rate required for MTC terminals with coverage enhancement and 5G terminals can be achieved.
    Type: Grant
    Filed: March 24, 2018
    Date of Patent: December 24, 2019
    Assignee: ZTE Corporation
    Inventors: Jun Xu, Bo Dai, Wen Zhang, Shuqiang Xia, Junfeng Zhang
  • Patent number: 10476573
    Abstract: The present disclosure provides a method and an apparatus for receiving Channel Quality Indication (CQI) information, as well as a method and an apparatus for transmitting CQI information. The method for receiving CQI information includes: transmitting a higher layer configuration signaling message to a terminal; and receiving CQI information from the terminal. The CQI information is determined based on a CQI table obtained based on the higher layer configuration signaling message. With the above solutions, higher data transmission reliability and lower data transmission rate required for MTC terminals with coverage enhancement and 5G terminals can be achieved.
    Type: Grant
    Filed: March 24, 2018
    Date of Patent: November 12, 2019
    Assignee: ZTE Corporation
    Inventors: Jun Xu, Bo Dai, Wen Zhang, Shuqiang Xia, Junfeng Zhang
  • Patent number: 10470063
    Abstract: Embodiments comprise: a plurality of channel filters, each channel filter to remove all but a specified portion of a wireless network spectrum; a plurality of radios each configured to receive one of the specified portions of the wireless network spectrum associated with one of the channels; wireless device identification logic to analyze the digital data stream for each channel to identify wireless devices and to packetize the transmissions using the identity of the sender and/or recipient; a plurality of wireless networking stacks each associated with one of the wireless devices identified by the wireless device identification logic; stack forwarding logic to receive packets from the wireless device identification logic and to forward the packets to wireless networking; and a communication feature extraction module to extract a specified set of features from the digital data stream generated by the radios.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: November 5, 2019
    Assignee: Afero, Inc.
    Inventors: Joe Britt, Omar Zakaria
  • Patent number: 10461918
    Abstract: A data transmission method includes, detecting an incoming link training sequence that is transmitted from an upstream transmitter, generating a marker indicating a timing location of a word included in the incoming link training sequence, generating a self link training sequence based on a local reference clock, adjusting a time difference in the incoming link training sequence and the self link training sequence, and retransmitting an incoming bit stream based on the self link training sequence being matched to the incoming link training sequence.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: October 29, 2019
    Assignee: MEGACHIPS TECHNOLOGY AMERICA CORPORATION
    Inventors: Alan Kobayashi, Rajanatha Shettigara, Ramakrishna Chilukuri, Rahul Kumar Agarwal, Nobuhiro Yanagisawa, Sujan Valiyaka Thomas, Ryuichi Moriizumi, Satoru Kumashiro
  • Patent number: 10277389
    Abstract: Phase detectors for clock and data recovery circuits are provided herein. In certain implementations, a phase detector includes sampling circuitry that generates a plurality of samples of an input data signal based on timing of a plurality of clock signals, a binary response circuit that processes the plurality of samples to generate a plurality of binary output signals providing a binary detector response, and a linear response circuit that processes the plurality of samples to generate a plurality of linear output signals providing a linear detector response. The phase detector generates one or more data output signals based on the plurality of samples to thereby recover data from the input data signal.
    Type: Grant
    Filed: July 20, 2017
    Date of Patent: April 30, 2019
    Assignee: ANALOG DEVICES GLOBAL
    Inventors: Bortecene Terlemez, Burak Dundar
  • Patent number: 10270584
    Abstract: A phase lock loop (PLL) includes: a binary phase detector configured to generate a first and second polarity signals that respectively indicating whether an incoming data stream is leading a feedback signal, or whether the feedback signal is leading the incoming data stream, wherein a difference between the first and second polarity signals does not represent an amount of phase difference between the incoming data stream and the feedback signal; a digital filter configured to: generate filtered first polarity signal on a first path and a second path that are different; and generate filtered second polarity signal on a third path and a fourth path that are different; a charge pump coupled to the digital filter and configured to: integrate the filtered first polarity signal and the filtered second polarity signal; and an oscillator configured to generate the synthesized clock signal serving as the feedback signal.
    Type: Grant
    Filed: February 14, 2018
    Date of Patent: April 23, 2019
    Assignee: Analog Bits Inc.
    Inventors: Alan C. Rogers, Kowshik Murali, Raghunand Bhagwan
  • Patent number: 10243876
    Abstract: Disclosed is a chip-based data transmission method for a data sending side. The method includes that protocol layer processing is performed on input data, and the data after the protocol layer processing is mapped to each physical channel for transmission; meta-frame layer processing is performed on the data transmitted by each physical channel, and the data after the meta-frame layer processing is sent. Another chip-based data transmission method for a data receiving side is provided which includes that meta-frame layer processing is performed on data received by each physical channel, the data after the meta-frame layer processing is mapped to a protocol layer for transmission, and the protocol layer processing is performed on the data transmitted by the protocol layer, and the data after the protocol layer processing is sent. A chip-based data transmission device and system, and a computer storage medium are also provided.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: March 26, 2019
    Assignee: Sanechips Technology Co., Ltd.
    Inventors: Lan Liu, Chen Yu
  • Patent number: 10038547
    Abstract: A method and system for synchronizing a server cluster having a plurality of nodes each provided with an internal clock and interconnected with each other by a clock interconnection network comprising a plurality of transmission segments. Time-stamping information is generated by the internal clock of a source chosen from the nodes of the server cluster. The time-stamping information is transmitted to all the nodes in the server cluster from the source; and and the internal clock of each node of the server cluster is adjusted from this time-stamping information The time for transmission of the time-stamping information is adjusted by each transmission segment to a constant value established for each transmission segment. Upon receiving the time-stamping information by any one of the nodes in the server cluster, its internal clock is adjusted from the time-stamping information and information relating to the transmission segments passed through between the source and this node.
    Type: Grant
    Filed: August 28, 2012
    Date of Patent: July 31, 2018
    Assignee: BULL SAS
    Inventor: Georges Lecourtier
  • Patent number: 9894451
    Abstract: A multi-zone media system and method for providing multi-zone media. As a non-limiting example, various aspects of this disclosure provide a system and method that flexibly presents media content (e.g., audio content) to a user as the user moves throughout a premises.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: February 13, 2018
    Assignee: SOUND UNITED, LLC.
    Inventors: Bradley M. Starobin, Matthew Lyons, Stuart W. Lumsden, Michael DiTullo, Paul O'Connor
  • Patent number: 9647784
    Abstract: Configuring a node (410, A-I, L-O) of a synchronization network, involves determining information about synchronization sources of a plurality of synchronization trails for passing synchronization information from the synchronization source (A, L, O, PRC) to the node to provide a synchronization reference. After determining automatically (210, 230, 330, 335, 340) synchronization transmission characteristics of trails (EF, FG, GH, HM, MN, OF, FI, IH) which use packet-based communication, the trails are compared automatically (240, 370), using their source information and their synchronization transmission characteristics, for selecting which of these trails to use for providing the synchronization reference for the node (N).
    Type: Grant
    Filed: January 18, 2010
    Date of Patent: May 9, 2017
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Stefano Ruffini, Giulio Bottari, Manuel Nardelli
  • Patent number: 9584570
    Abstract: An apparatus for distributing video content includes one or more video input modules each adapted to receive a video signal from a video source, and a video combiner for receiving the video signals from the one or more video inputs and generating a video packet data stream. The apparatus also includes at least one video output module adapted to transmit the video packet data stream, and a processor coupled to the video combiner and the at least one video output. The processor cooperates with one or both of the video combiner and the at least one video output to transcode at least a portion of the video packet data stream.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: February 28, 2017
    Assignee: Pelco, Inc.
    Inventor: Bryan K. Neff
  • Patent number: 9571294
    Abstract: A communication device for communicating with a plurality of terminals via a wireless network, the communication device being configured to, when it has a message to transmit to that plurality of terminals: select, from a multiple of available acknowledgement mechanisms, an acknowledgement mechanism for the terminals to use in acknowledging receipt of the message and communicate the selected acknowledgement mechanism to the plurality of terminals.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: February 14, 2017
    Assignee: NEUL LTD.
    Inventors: Alan Coombs, Neil MacMullen, William Webb
  • Patent number: 9544079
    Abstract: A remote device comprising a remote clock oscillator with relatively low precision, a receiver that receives time packets transmitted periodically from the hub device via the satellite, each time packet including a hub real time clock (RTC) value and a hub network clock reference (NCR) value, a remote RTC counter that represents a remote RTC value at the remote, a remote NCR counter that represents a remote NCR value at the remote, and processing circuitry that extracts the hub RTC value and the hub NCR value from a current time packet, compares contents of the current time packet with contents of a previously received time packet, and adjusts the remote RTC counter based on the result of the comparison to synchronize the remote RTC value at the remote with the hub RTC value.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: January 10, 2017
    Assignee: VT IDIRECT, INC.
    Inventors: Aneesh Vasudev Dalvi, Mohsen Amiri Farahani
  • Patent number: 9509444
    Abstract: Methods and devices are provided wherein feedback is included in a checksum. An example method includes communicating between a first device and a second device. The method further includes including feedback information used by the first device as input to a checksum calculation, wherein the feedback information is not communicated concurrently with the checksum from the first device to the second device.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: November 29, 2016
    Assignee: Infineon Technologies AG
    Inventors: Wolfgang Scherr, Christian Reidl, Michael Strasser, Veikko Summa
  • Patent number: 9401856
    Abstract: A network comprising a latency monitoring point adapted to calculate a forward latency of a path between a master node and a slave node on the basis of time stamps which are exchanged periodically between said master node and said slave node by a time alignment protocol used in said network.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: July 26, 2016
    Assignee: ADVA Optical Networking SE
    Inventors: Anthony Magee, Peter Tumbull
  • Patent number: 9331821
    Abstract: The present invention discloses a data retransmission method, apparatus, and system, and relates to the field of communications. In a data retransmission method, a special codeword is determined according to a difference between a number of layers selected by a transmitter and the number of layers that need to be occupied for retransmitting a codeword. The number of layers that need to be occupied by the codeword to be retransmitted is smaller than the number of layers selected by the transmitter and no new data needs to be transmitted and wherein the number of transport blocks comprised in the special codeword is equal to the difference. The codeword that needs to be retransmitted and the special codeword are allocated to each transport layer through a layer mapping.
    Type: Grant
    Filed: February 2, 2015
    Date of Patent: May 3, 2016
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Shuju Fan, Xueli Ma
  • Patent number: 9215108
    Abstract: A decision feedback equalizer that can operate at higher speed is provided. The decision feedback equalizer includes a weighting addition circuit (adder 21, coefficient units Tap1a, Tap2 to Tapn) that sums an input signal to weighted versions of feedback signals FB1 to FBn, n being an integer not less than 2. The decision feedback equalizer also includes a decision circuit 11 that decides whether or not the result of addition by the weighting addition circuit is not less than a defined threshold value and that outputs the result of the decision to outside and to a shift register (latch circuits L2 to Ln). The decision circuit operates in synchronism with a clock signal. The shift register sequentially holds the result of decision of the decision circuit 11 in synchronism with the clock signal, and outputs the contents held by its component registers as feedback signals FB2 to FBn.
    Type: Grant
    Filed: July 9, 2015
    Date of Patent: December 15, 2015
    Assignee: Renesas Electronics Corporation
    Inventor: Yasushi Amamiya
  • Patent number: 9198130
    Abstract: A method for activating a node in a Wireless Sensor Network includes detecting and amplifying pulse signals from a base station; determining whether pulses in the amplified pulse signal are valid; and counting valid pulses in three time periods. A target identifier is calculated using a predetermined formula and numbers of the valid pulses counted. Whether the target identifier matches an identifier of the communication system is determined. The communication system when the target identifier matches the identifier of the communication system is activated. The node is also provided.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: November 24, 2015
    Assignees: HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD., HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: Kai-Sheng Ren
  • Patent number: 9166738
    Abstract: In a semiconductor device, a transmitting circuit generates a delayed data signal and a first delayed retransmission request signal by delaying a data signal and a first retransmission request signal, respectively, and outputs a pulse signal at an edge of the delayed data signal and the first delayed retransmission request signal and prohibits output of the pulse signal at an edge of the first delayed retransmission request signal during a specified period across an edge of the delayed data signal.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: October 20, 2015
    Assignee: Renesas Electronics Corporation
    Inventor: Shunichi Kaeriyama
  • Patent number: 9098227
    Abstract: A method for employing a controlled-modification current time value is presented. In the method, the current time value is maintained. Also, requests for modification of the current time value are received. The requests are processed so that the requested modification associated with one of the requests is immediately incorporated into the current time value, and so that the requested modification associated with another one of the requests is not immediately incorporated into the current time value.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: August 4, 2015
    Assignee: EchoStar Technologies L.L.C.
    Inventor: John A. Card, II
  • Patent number: 9048934
    Abstract: A voltage mode transceiver having an input/output (I/O) node for coupling to a bidirectional signaling link is disclosed. The transceiver includes a transmit circuit having an output coupled to the node and a receive circuit. The transmit circuit includes a transmit digital-to-analog converter (DAC) circuit having a transmit impedance network and a hybrid impedance network. The transmit impedance network generates an analog transmit version of a digital data signal while the hybrid impedance network couples to the transmit impedance network to generate an analog mirror version of the digital data signal. The receive circuit has a first input coupled to the I/O node and a second input coupled to receive the analog mirror version of the digital data signal.
    Type: Grant
    Filed: January 9, 2012
    Date of Patent: June 2, 2015
    Assignee: Aquantia Corp.
    Inventor: Ramin Farjadrad
  • Patent number: 9042842
    Abstract: In a wireless network, plural downlink signals from plural base stations are transmitted to a terminal. The plural downlink signals all carry the same information to the terminal. The terminal provides feedback on the downlink channels. The feedback provides information on the taps of the channels. The amount of information fed back is constrained. Based on the feedback, transmission parameters of the downlink signals are adjusted. The process of transmitting, providing feedback, and adjusting the parameters continue so that the energy of the downlink signal is enhanced at the terminal location and suppressed elsewhere. Beam forming can be used to further suppress the energy signature at locations other than the terminal location.
    Type: Grant
    Filed: August 31, 2013
    Date of Patent: May 26, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Kumar Balachandran, Leonid Krasny
  • Patent number: 9042431
    Abstract: A transceiver with non-deterministic delay characteristics is analyzed and adjusted to provide a transceiver with deterministic delay characteristics. The transceiver may be implemented with a variety of device types to support high bandwidth operation over a wide range of frequencies. Deterministic behavior allows use of the transceiver in source synchronous interfaces. The transceiver may also be dynamically analyzed and adjusted during operation as operation frequency changes.
    Type: Grant
    Filed: February 24, 2009
    Date of Patent: May 26, 2015
    Assignee: Altera Corporation
    Inventors: Venkat Yadavalli, Sridhar Krishnamurthy, Gerardo Orlando, David Richardson King, Ken Clauss, Mark Krumpoch, Peter Markou
  • Patent number: 9031160
    Abstract: A modulator subjects an input signal to primary modulation to generate a primary modulated signal. A transmitter generates and transmits a transmission signal based on a secondary modulated signal generated from the primary modulated signal. A retransmission request receiver receives a retransmission request that contains identification information. An operator uses a data sequence that is a set of elements of a same number as a number of elements in an input signal identified by the identification information and with element values of 1 or 0 to generate operation data whose elements are values of exclusive OR of respective elements of the input signal and respective elements of the data sequence that are at same positions as positions of the respective elements of the input signal. If a retransmission request receiver receives a retransmission request, the modulator and transmitter perform the above processing using the operation data as an input signal.
    Type: Grant
    Filed: January 27, 2014
    Date of Patent: May 12, 2015
    Assignee: Icom Incorporated
    Inventor: Nobuyoshi Nishikawa
  • Patent number: 9032274
    Abstract: A multi-link input/output (I/O) interface uses both feed-forward and feedback signaling to reduce the impact of noise on data capture at a memory controller. To transfer data from a source module to a destination module, a defined pattern is communicated from the memory module along a master channel concurrent with the memory module providing data via one or more slave channels. Based on the phase of the defined pattern as it is received, the multi-link I/O interface feeds forward to the slave channels control signaling whose phase reflects a predicted noise pattern for the system. Each slave channel performs CDR by adjusting timing of its corresponding capture clock signal based on the fed forward control signaling and based on feedback signaling for the corresponding slave channel, whereby the feedback signaling reflects an error measurement between a phase of a capture clock signal and transitions in received data.
    Type: Grant
    Filed: May 21, 2013
    Date of Patent: May 12, 2015
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Shadi M. Barakat, Bhuvanachandran K. Nair, Paul-Hugo Lamarche
  • Patent number: 9025485
    Abstract: The present invention relates to a method and an apparatus for transmitting and receiving a reference signal in a wireless communication system. In the method, in order to dynamically switch an uplink (UL) Demodulation-Reference Signal (DM-RS) according to the communication environment, such as CoMP and MU-MIMO, a parameter set for generation of a reference signal sequence is configured to include a Virtual Cell Identifier (VCID) parameter configured by information of a total of 9 bits and a cyclic shift hopping initial value parameter cinitCSH, which is 9-bit information representing one integer value among 510 integer values. Therefore, it may be possible to achieve dynamic transmission or reception of a reference signal and channel estimation through the dynamic transmission or reception of the reference signal even when the communication environment dynamically changes as in a Cooperative Multiple Point transmission and reception (CoMP) scenario.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: May 5, 2015
    Assignee: Pantech Co., Ltd.
    Inventor: Sung Jun Yoon
  • Patent number: 9025715
    Abstract: A storage device configured to communicate with a host according to a serial communication standard. The storage device includes a receiver configured to receive host data from the host; a clock data recovery circuit configured to determine a first frequency of host data transmitted by a host; a phase locked loop configured to generate a local phase corresponding to a local clock signal; a frequency offset calculator configured to generate a frequency offset corresponding to the first frequency and a second frequency of the local clock signal; an accumulator configured to generate a phase offset corresponding to a difference between the local phase and a phase of the host data; an interpolator configured to generate a compensated local clock signal using the phase offset and the local phase; and a transmitter configured to transmit device data to the host using the compensated local clock signal.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: May 5, 2015
    Assignee: Marvell World Trade Ltd.
    Inventors: Henri Sutioso, Lei Wu
  • Patent number: 9019259
    Abstract: The present invention provides a transmission apparatus and a reception apparatus easy to sample data correctly by a clock in the reception apparatus. In a detection section 25 of a reception apparatus 20n, based on data output from a sampler section 23, both or either of detection of a phase difference between data received by a data reception section 21 and a clock received by a clock reception section 22, and/or waveform distortion of this data is performed. A detection signal indicating a result of detection by the detection section 25 is transmitted to a transmission apparatus 10 by a detection signal transmission section 26. In the transmission apparatus 10, by a control section 15, based on the detection signal received by a detection signal reception section 14, both or either of control of adjustment of a phase between data transmitted by a data transmission section 11 and a clock transmitted by a clock transmission section 12, and/or adjustment of an amplitude of the data is performed.
    Type: Grant
    Filed: April 22, 2010
    Date of Patent: April 28, 2015
    Assignee: Thine Electronics, Inc.
    Inventors: Seiichi Ozawa, Hironobu Akita
  • Patent number: 9021095
    Abstract: Disclosed is an improved approach for implementing an on-demand scheduler in a mobile device and the structures to support realtime on-demand schedulers. A lightweight word-based structure is disclosed for storing scheduling-related data on the mobile device. Using this lightweight word-based structure enables on-demand and real-time scheduling. This type of lightweight structure also permits scheduling activities to be performed in a disconnected mode, which can then be later synchronized with the server to confirm the booking In addition to appointment scheduling, this technique can also be implemented for scheduling of any type of resource.
    Type: Grant
    Filed: May 27, 2011
    Date of Patent: April 28, 2015
    Assignee: Oracle International Corporation
    Inventors: Hari Krishna Gutlapalli, Suhas R. Mehta
  • Patent number: 9008594
    Abstract: A method for adaptive communication in an HF frequency band includes at least one of the following steps: the determination of a payload subband S that is available for a transmission in the HF band, the selection in the payload subband S of a set of n frequency channels of identical width according to a frequency allocation plan and the quality of the link of each of said channels, or the simultaneous transmission on the n frequency channels of a signal complying with an HF waveform.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: April 14, 2015
    Assignee: Thales
    Inventors: Catherine Lamy-Bergot, Crambert Philippe, Multedo Gilbert, Merel Dominique, Gaschi Jean-Fran├žois
  • Patent number: 8989299
    Abstract: The present invention discloses a method and a device of sending and receiving precoding information. A terminal terminal obtains a wideband precoding matrix indicator PMI. The terminal encodes an MSB of the wideband PMI to obtain encoded information. The MSB of the wideband PMI is encoded separately or jointly with other information and the MSB is a part of the wideband PMI. The terminal sends encoded information to a data sending end.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: March 24, 2015
    Assignee: Huawei Technologies Co., Ltd
    Inventors: Yongxing Zhou, Jianguo Wang
  • Patent number: 8982714
    Abstract: A communication system is provided. A first communications device transmits at least one first message including predetermined bit sequences. A second communications device determines one or more antenna weighting vectors (AWVs) and one or more bitloading vectors (BLVs) by using the first message in accordance with a predetermined rule and transmits a second message including information pertinent to the AWVs and the BLVs to the first communications device. The first communications device further communicates with the second communications device about an AWV selected from the AWVs and the first and second communications devices apply the selected AWV to the corresponding antennas before exchanging data. The data includes a header carrying information pertinent to a BLV selected from the BLVs used to encode the data and a payload is transmitted to the second communications device. The second communications device decodes the data in accordance with the selected BLV.
    Type: Grant
    Filed: November 3, 2009
    Date of Patent: March 17, 2015
    Assignee: Mediatek Inc.
    Inventors: Yung Ping Hsu, Yuh-Ren Jauh, Chao-Chun Wang
  • Patent number: 8976874
    Abstract: In a modular signal mirroring system each point-to-point RF transceiver end has a controller module coupled to one or more I/O modules. The I/O modules have various input and output circuits. A signal received at the near end is reconstructed at the far end after being transmitted in an RF packet. The reconstructed signal may be the same as the input signal, inverted from the input signal or level-shifted from the input signal. It is representative of the input signal following the input signal's state after a time-quantization latency. Transmission between the two ends is via a periodic transmission controlled in a master slave protocol. If a transmission is not received in a timely manner or, in some systems, if intentional interference with transmissions is detected, the reconstructed signal is forced to a safe state determined by local switch settings. The settings include the last known good state.
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: March 10, 2015
    Assignee: OleumTech Corporation
    Inventor: Matthew A. Tanner
  • Patent number: 8976850
    Abstract: Provided is a channel state information (CSI) sharing method and apparatus in a Multiple User Multiple Input Multiple Output (MU-MIMO) environment. Each node may use network-coding to reduce overhead necessary for sharing CSI between all nodes in the MU-MIMO environment. A transmitter may dynamically select, based on the CSI between receivers, a path used for transmitting data to each receiver and a receiver to be used as a relay based on the global CSI. A decoding performance may be improved based on the CSI between the transmitter and the receivers.
    Type: Grant
    Filed: December 30, 2010
    Date of Patent: March 10, 2015
    Assignees: Samsung Electronics Co., Ltd., Purdue Research Foundation
    Inventors: Bruno Clerckx, Jun Il Choi, Taejoon Kim, Obadamilola Aluko, David J. Love
  • Patent number: 8971436
    Abstract: The present invention provides a user equipment and channel state information feedback method. The channel state information feedback method used in a coordinated multi-point system includes acquiring small-scale channel state information H?=[H?1, H?2, . . . , H?K] between a user equipment and all base stations joining coordination, acquiring large-scale channel state information li(i=1, . . . , K) between the user equipment and each of the base stations joining coordination, acquiring a CQI (CQIi=li?|H?|, i=1, . . .
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: March 3, 2015
    Assignee: NTT DOCOMO, INC.
    Inventors: Satoshi Nagata, Yoshihisa Kishiyama, Xiang Yun, Jianchi Zhu, Xiaoming She, Lan Chen
  • Patent number: 8948273
    Abstract: A method and apparatus for high quality signal transmission, which utilizes normal-mode current flow and produces an audio output signal with suppression of normal-mode voltage amplitude, comprising transmitting an audio input signal source though (1) a buffer amplifier; (2) a modulated current source; (3) a pair of wires; (4) a current transformer; and (5) a receiver amplifier for said current transformer.
    Type: Grant
    Filed: September 17, 2007
    Date of Patent: February 3, 2015
    Inventors: J. Craig Oxford, D. Michael Shields
  • Patent number: 8917759
    Abstract: A transceiver is described. The transceiver includes a first injection-locked oscillator and a second injection-locked oscillator. The transceiver also includes a first phase-locked loop coupled with the first injection-locked oscillator. The first phase-locked loop is configured to generate a first frequency reference. Further, the transceiver includes a second phase-locked loop coupled the second injection-locked oscillator. The second phase-locked loop is configured to generate a second frequency reference. The transceiver includes a mixer configured to receive the first phase-locked loop output and configured to receive said second injection-locked oscillator output. The mixer is also configured to generate a carrier frequency signal based on the first injection-locked oscillator output and the second injection-locked oscillator output. And, the transceiver includes a modulator configured to receive said carrier frequency signal.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: December 23, 2014
    Assignee: Innophase Inc.
    Inventor: Yang Xu
  • Publication number: 20140362960
    Abstract: There is provided a receiver including a first delay time calculating unit configured to calculate a first delay time indicating a time lag between transmission of a transmission signal by a transmitter and reception of the transmission signal by the receiver, a second delay time calculating unit configured to calculate a second delay time indicating a time lag between transmission of a response signal by the receiver and reception of the response signal by the transmitter, and a time difference calculating unit configured to calculate a time difference between a time of a clock in the transmitter and a time of a clock in the receiver.
    Type: Application
    Filed: May 23, 2014
    Publication date: December 11, 2014
    Applicant: Sony Corporation
    Inventor: Osamu MATSUNAGA
  • Patent number: 8908788
    Abstract: A method for selecting antenna elements at a base station can include selecting multiple transmit antenna elements from several antenna elements according to a work mode of the base station. The work mode can be an open-loop or a closed-loop working mode. In open-loop mode the base station does not receive feedback information regarding channel quality from a mobile station. In closed-loop mode feedback information is received. For example, for control signaling, or when the speed of a mobile station is very high, the base station may determine that the working mode is open-loop. When the information being transmitted is data for a specific mobile station and the mobile station is moving at a speed under a threshold, the base station may select or determine the working mode to be the closed-loop working mode. Antenna elements are selected, for example, according to a spatial correlation appropriate to the work mode.
    Type: Grant
    Filed: December 31, 2010
    Date of Patent: December 9, 2014
    Assignee: Alcatel Lucent
    Inventors: Keying Wu, Dong Li
  • Patent number: 8891652
    Abstract: Provided is a method of wireless communication which includes selecting a codebook from a plurality of codebooks in accordance with an antenna characteristic, and transmitting an indication of the selected codebook. Each of the plurality of codebooks is associated with one of a plurality of antenna characteristics. In some designs, channel state information is received from a user equipment. The channel state information may be used to determine downlink scheduling and/or precoding. In some designs, the channel state information may include feedback elements associated with different subband granularity. The feedback elements may also indicate a selection of a subset of precoder column vectors and/or a phase offset between two groups of transmit antennas.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: November 18, 2014
    Assignee: Qualcomm Incorporated
    Inventors: Peter Gaal, Stefan Geirhofer, Juan Montojo
  • Patent number: 8891715
    Abstract: A pre-distortion circuit that may introduce a pre-distortion signal in a communication channel by determining a harmonic signal of the signal to be output. One or more image correction signals of the signal to be output may be determined. The one or more image correction signals may be complex conjugate signal variations of the signal to be output. The harmonic signal, the one or more image correction signals and the signal to be output may be combined into a combined output signal. The combined output signal may be transmitted to a digital-to-analog converter. The predistortion circuit may be implemented in a FPGA, an ASIC, a digital-to-analog converter, and/or a separate IC package.
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: November 18, 2014
    Assignee: Analog Devices, Inc.
    Inventors: Ganesh Ananthaswamy, Sudheesh A. Somanathan
  • Patent number: 8885583
    Abstract: A mobile station device transmits a random access preamble, whose preamble ID is randomly selected by the mobile station device, to a base station device and performs uplink timing alignment based on the synchronization timing deviation information included in a random access response which the base station device transmits in response to the transmitted random access preamble. In an uplink synchronous status, upon receiving the random access response including timing deviation information, the mobile station device ignores the timing deviation information. Otherwise, the mobile station device performs the uplink timing alignment based on the timing deviation information.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: November 11, 2014
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Shohei Yamada, Yasuyuki Kato
  • Patent number: 8879681
    Abstract: A system and method are provided for determining a time for safely sampling a signal of a dock domain. In one embodiment, a frequency estimate of a first clock domain is calculated utilizing a frequency estimator. Additionally, a time during which a signal from the first clock domain is unchanging is determined such that the signal is capable of being safely sampled by a second clock domain, using the frequency estimate. In another embodiment, a frequency estimate of a first dock domain is calculated utilizing a frequency estimator. Further, a phase estimate of the first clock domain is calculated based on the frequency estimate, utilizing a phase estimator. Moreover, a time during which a signal from the first clock domain is unchanging is determined such that the signal is capable of being safely sampled by a second clock domain, using the phase estimate.
    Type: Grant
    Filed: March 22, 2013
    Date of Patent: November 4, 2014
    Assignee: NVIDIA Corporation
    Inventors: William J. Dally, Stephen G. Tell
  • Patent number: 8879609
    Abstract: A communication system includes a first communication device and a second communication device that performs power line communication with the first communication device via an electric power line, wherein the first communication device transmits a plurality of times an initial packet signal added with an error detection code in each of reference timing at regular intervals in the vicinity of zero crossing timing. The second communication device determines whether a reception state is good or poor based on a result of the error detection on each of the received initial packet signals, and when the reception state is poor, the second communication device transmits an ACK signal in timing shifted by micro time from the reference timing after receiving the initial packet signal. Then, the first communication device transmits a data packet signal in timing at the regular interval after the timing of receiving the ACK signal.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: November 4, 2014
    Assignee: MegaChips Corporation
    Inventor: Handa Chen
  • Patent number: 8861665
    Abstract: A communication system includes a first communication device and a second communication device that performs power line communication with the first communication device via an electric power line, wherein the first communication device transmits an initial packet signal added with an error detection code in each zero crossing period including zero crossing timing while changing transmission timing within the zero crossing period. The second communication device specifies optimum communication timing out of a plurality of pieces of transmission timing within the zero crossing periods based on a result of error detection on each initial packet signal, and transmits an ACK signal including timing information on the optimum communication timing. Then, the first communication device transmits a data packet signal in the optimum communication timing within the zero crossing period, which is specified based on the timing information.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: October 14, 2014
    Assignee: MegaChips Corporation
    Inventor: Eiji Baba
  • Patent number: 8854550
    Abstract: A data processing device includes a clock converter, a data converter, and an error detector. The clock converter is configured to receive a first clock signal, convert the first clock signal into a second clock signal, and output the second clock signal. The data converter is configured to receive first data, convert the first data into second data using the second clock signal, and output the second data. The error detector is configured to check whether the first clock signal is in a first clock state or a second clock state upon the first data transitioning to a first data state, and output an enable signal to the clock converter upon determining that the first clock signal has transitioned to the first clock state from the second clock state.
    Type: Grant
    Filed: November 4, 2013
    Date of Patent: October 7, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Tae-Pyeong Kim, Han-Kyul Lim, Cheon-Oh Lee
  • Patent number: 8831073
    Abstract: A wireless transmission system includes: a communication unit for transmission; and a communication unit for reception. The communication units for transmission and reception are housed in a housing of the same electronic apparatus, or the communication unit for transmission is housed in a housing of first electronic apparatus and the communication unit for reception is housed in a housing of second electronic apparatus and a wireless signal transmission path enabling wireless information transmission between the communication units is formed between the communication units when the first and the second electronic apparatus are disposed at given positions to be integrated with each other. The communication unit for transmission includes a first carrier signal generating unit and a first frequency converter, and the communication unit for reception includes a second carrier signal generating unit, and a second frequency converter.
    Type: Grant
    Filed: August 5, 2010
    Date of Patent: September 9, 2014
    Assignee: Sony Corporation
    Inventor: Kenichi Kawasaki
  • Patent number: RE45528
    Abstract: In order to transmit a large amount of data in series at a time with a MIMO communication scheme while avoiding deterioration of decoding characteristics due to change over time by a channel matrix, a wireless communication system uses an open-loop type and a closed-loop type of MIMO communication modes in combination and switches to the open-loop MIMO communication mode in response to the information that the amount of data to be transmitted at a time has exceeded a predetermined amount of bits or a predetermined transmission time during data transmission under the closed-loop MIMO communication mode. By discontinuing useless closed-loop MIMO communication and switching to the open-loop MIMO communication mode that is better than Zero-forcing, the decoding characteristics are prevented from simply becoming deteriorated.
    Type: Grant
    Filed: May 23, 2013
    Date of Patent: May 26, 2015
    Assignee: SONY CORPORATION
    Inventor: Ryo Sawai