Single Message Via Plural Carrier Wave Transmission Patents (Class 455/59)
  • Patent number: 10271287
    Abstract: There is provided a method, performed by a network node, for enabling uplink power control in a wireless network. The method comprises assigning (S1) a transmit power for downlink transmission of a reference signal, wherein the reference signal is to be used for power control of at least one uplink transmission. The method further comprises determining (S2) a reference signal transmit power parameter providing a fictitious value for the transmit power of the reference signal that is different from the assigned transmit power. The method also comprises transmitting (S3) the reference signal transmit power parameter to at least one wireless device to enable the wireless device(s) to perform transmit power determination for the uplink transmission(s) at least partly based on the fictitious value for the transmit power of the reference signal.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: April 23, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Ying Sun, Wei Zhao, Yufeng Zhao
  • Patent number: 10178651
    Abstract: A method and apparatus for operating a user equipment (UE) in a wireless communications network, the method separately encoding and rate matching a first set of information bits and a second set of information bits; mapping and concatenating the encoded and rate matched first set of information bits with the encoded and rate matched second set of information bits, thereby creating a bit stream; and modulating and transmitting the bit stream.
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: January 8, 2019
    Assignee: BlackBerry Limited
    Inventors: Joon Beom Kim, Zhijun Cai
  • Patent number: 10112581
    Abstract: A remote control system for a vehicle may include a transponder configured to communicate with a mobile device, and a controller comprising a processing unit. The processing unit may be configured to: receive a control request to perform a vehicle function from the mobile device; receive an authentication signal from the mobile device, the authentication signal being generated by the transponder; and perform the vehicle function based on the authentication signal.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: October 30, 2018
    Assignee: FARADAY&FUTURE INC.
    Inventors: Jana Mahen Fernando, Eric Ryan Evenchick, Anil Paryani
  • Patent number: 9754338
    Abstract: Particular embodiments described herein provide for a communication system that can be configured to receive a request for a service from a user, communicate to the user details about a specific service provider that will fulfill the requested service, determine a location of the user using a location module, and notify the user when the user is proximate to the specific service provider that will fulfill the requested service. Further, the communication system can be configured to notify the user when the user is not proximate to the specific service provider that will fulfill the requested service. In an example, the specific service provider is a transportation provider.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: September 5, 2017
    Assignee: GT Gettaxi Limited
    Inventors: Ziv Haparnas, Talmon Marco, Igor Magazinik, Sunny Marueli
  • Patent number: 9294166
    Abstract: A wireless transmission method capable of transmitting a data stream by a wireless transmitter having a plurality of transmitting antennas, the wireless transmission method includes at the wireless transmitter, changing the number of candidates of selectable transmission beams to be formed for transmitting the data stream according to the number of transmission data streams, said transmission beams are formed by predetermined number of the plurality of transmitting antennas.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: March 22, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Masafumi Tsutsui, Hiroyuki Seki
  • Patent number: 9031154
    Abstract: A transmission device 100 has an inverse fast Fourier transform converter 104 (first circuit) that acquires plural multi-value symbol data each of which is assigned to a dedicated subcarrier, and generates waveform data on the basis of the acquired plural multi-value symbol data, and a digital frequency converter 107 (second circuit) that shifts frequency of the waveform data generated by the inverse fast Fourier transform converter 104.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: May 12, 2015
    Assignee: Lenovo Innovations Limited (Hong Kong)
    Inventor: Toshiyuki Oga
  • Patent number: 8995916
    Abstract: A wireless transmitter controls the number of transmission beams to be formed for transmitting a data stream depending on the number of data streams to be transmitted, and a wireless receiver selectively receives any one or more of the transmission beam from the transmission beams. In this manner, by changing the number of transmission beams (the original number of beams selectable on the receiving side) to be formed depending on the number of transmitting data streams, high throughput characteristics by a low interbeam correlation at the time of the multistream transmission and a large directional gain at the time of a single stream may be achieved.
    Type: Grant
    Filed: July 22, 2008
    Date of Patent: March 31, 2015
    Assignee: Fujitsu, Limited
    Inventors: Masafumi Tsutsui, Hiroyuki Seki
  • Patent number: 8982998
    Abstract: A transmission apparatus includes a plurality of orthogonal frequency division multiplexing (OFDM) modulation signal generators, which generate a first OFDM modulation signal and a second OFDM modulation signal. The transmission apparatus also includes a transmitter that transmits the first OFDM modulation signal from a first antenna and the second OFDM modulation signal from a second antenna, in an identical frequency band.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: March 17, 2015
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Yutaka Murakami, Masayuki Orihashi, Akihiko Matsuoka
  • Patent number: 8948279
    Abstract: A control and processing system for use with an interrogator and an interrogation system employing the same. In one embodiment, the control and processing system includes a correlation subsystem having a correlator that correlates a reference code with a reply code from a radio frequency identification (RFID) tag and provides a correlation signal therefrom. The control and processing system also includes a decision subsystem that verifies a presence of the RFID tag as a function of the correlation signal.
    Type: Grant
    Filed: March 3, 2005
    Date of Patent: February 3, 2015
    Assignee: Veroscan, Inc.
    Inventors: John P. Volpi, Logan Scott, Eric McMurry
  • Patent number: 8934564
    Abstract: A multi-user multiple input, multiple output (MIMO) downlink beamforming system is provided to enable transmit beamforming vectors to be efficiently provided to a subset of user equipment devices, where spatial separation or zero-forcing transmit beamformers (wi) are computed at the base station and used to generate precoded reference signals. The precoded reference signals are fed forward to the user equipment devices, which apply one or more hypothesis tests to the precoded reference signals to extract the precoding matrix (W), including the specific transmit beamforming vector (WUE) designed for the user equipment, and this extracted information is used to generate receive beamformers (vi).
    Type: Grant
    Filed: July 17, 2013
    Date of Patent: January 13, 2015
    Assignee: Apple Inc.
    Inventors: Jayesh H. Kotecha, Jayakrishnan C. Mundarath
  • Patent number: 8918051
    Abstract: A mobile device includes a first interface module, a second interface module, and a control module. The first interface module is configured to interface the mobile device to a first wireless network and to receive data from a transmitting device via the first wireless network. The second interface module is configured to interface the mobile device to a second wireless network. The control module is configured to determine based on the data received when to switch a link to the transmitting device from the first wireless network to the second wireless network. The control module is further configured to transmit a message that informs the transmitting device not to transmit the data to the mobile device via the first wireless network in response to the link being switched to the second wireless network.
    Type: Grant
    Filed: February 3, 2010
    Date of Patent: December 23, 2014
    Assignee: Marvell International Ltd.
    Inventors: Lu Chang, Paul A. Lambert
  • Patent number: 8909147
    Abstract: In accordance with an example embodiment of the present invention, a method is presented which comprises searching for at least a device that is capable of a point-to-point transmission of media data. If such a device is not selected for the point-to-point transmission, a transmission of the media data is started on a second communication interface using a broadcast transmission.
    Type: Grant
    Filed: June 23, 2008
    Date of Patent: December 9, 2014
    Assignee: Nokia Corporation
    Inventors: Lee Corey Sinton, Neil Briffett
  • Patent number: 8892044
    Abstract: Provided are a reception apparatus and transmission apparatus for supporting a scalable bandwidth in a carrier aggregation environment. The reception apparatus and transmission apparatus can link carrier aggregation technology and scalable bandwidth technology by supporting a scalable bandwidth having different bandwidths in size in a carrier aggregation environment, thereby enhancing compatibility between different wireless communication systems.
    Type: Grant
    Filed: September 17, 2013
    Date of Patent: November 18, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventor: Moon-Sik Lee
  • Patent number: 8891692
    Abstract: A data processing apparatus is arranged to map input data symbols to be communicated onto a predetermined number of sub-carrier signals of Orthogonal Frequency Division Multiplexed OFDM symbols. The predetermined number of sub-carrier signals is determined in accordance with one of a plurality of operating modes and the input data symbols are divided into first sets of input data symbols and second sets of input data symbols.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: November 18, 2014
    Assignee: Sony Corporation
    Inventors: Matthew Paul Athol Taylor, Samuel Asangbeng Atungsiri, John Nicholas Wilson
  • Patent number: 8891678
    Abstract: A receiver receives, using a plurality of antennas, a multiplexed signal that includes (i) a first OFDM modulation signal with a subcarrier carrying a symbol including multiplex information and a subcarrier carrying a pilot symbol and a subcarrier carrying a data symbol and (ii) a second OFDM modulation signal with a subcarrier carrying a symbol including multiplex information and a subcarrier carrying the pilot symbol and a subcarrier carrying the data symbol. A decoder uses the symbol including multiplex information and decodes the data symbol.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: November 18, 2014
    Assignee: Wi-Fi One, LLC
    Inventors: Yutaka Murakami, Masayuki Orihashi, Akihiko Matsuoka
  • Patent number: 8885736
    Abstract: Systems and methods for reducing the peak-to-average ratio (PAR) at the transmitter can reduce the dynamic range required in various analog components. PAR can be reduced by applying a time-domain compensation signal which reduces the magnitude of peaks in the time-domain signal prior to transmission where the time-domain compensation signals use tones that are reserved for the purpose of reducing the PAR. The reservation of these reserved tones for PAR can be implemented by altering the typical startup procedures in a digital subscriber line (xDSL) system. The use of the reserved tones to reduce the PAR can be implemented using a low complexity algorithm or using an adaptive technique.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: November 11, 2014
    Assignee: Ikanos Communications, Inc.
    Inventors: Rahul Garg, Patrick Duvaut, Amitkumar Mahadevan, Harish Jethanandani
  • Patent number: 8885761
    Abstract: A data processing apparatus maps input symbols to be communicated onto a predetermined number of sub-carrier signals of an Orthogonal Frequency Division Multiplexed (OFDM) symbol. The data processor includes an interleaver memory which reads-in the predetermined number of data symbols for mapping onto the OFDM sub-carrier signals. The interleaver memory reads-out the data symbols on to the OFDM sub-carriers to effect the mapping, the read-out being in a different order than the read-in, the order being determined from a set of addresses, with the effect that the data symbols are interleaved on to the sub-carrier signals. The set of addresses are generated from an address generator which comprises a linear feedback shift register and a permutation circuit.
    Type: Grant
    Filed: April 9, 2012
    Date of Patent: November 11, 2014
    Assignee: Sony Corporation
    Inventors: Jean-Luc Peron, Matthew Paul Athol Taylor, Samuel Asanbeng Atungsiri, John Nicholas Wilson
  • Patent number: 8873649
    Abstract: Disclosed are a method for generating a code sequence that can be used for acquisition of initial synchronization, cell detection, channel estimation, etc. in a mobile communication system, and a transmitter. A method for generating a code sequence in a transmitting side of a mobile communication system includes combining at least two code sequences with each other, and converting a code sequence generated by the combining step into a time domain signal.
    Type: Grant
    Filed: April 30, 2007
    Date of Patent: October 28, 2014
    Assignee: LG Electronics Inc.
    Inventors: Seung Hee Han, Min Seok Noh, Yeong Hyeon Kwon
  • Patent number: 8824580
    Abstract: Methods and systems are disclosed for transmitting data over a desired frequency tone in the presence of an interference that has an unknown magnitude that is substantially constant. In general, data symbols are transmitted in a null space of the desired frequency tone. The null space of the desired frequency tone is orthogonal to the desired frequency tone. As such, the data symbols transmitted in the null space of the desired frequency tone are not interfered with by the interference at the desired frequency tone regardless of the magnitude of the interference. The data symbols transmitted in the null space of the desired frequency tone can then be recovered by a receiver without estimation of or compensation for the interference at the desired frequency tone.
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: September 2, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventor: Dennis Hui
  • Patent number: 8818264
    Abstract: A data transmitting method, a data controlling module and a mobile device using the same are disclosed for transmitting data from the mobile device to a destination on an internet. The mobile device includes a first communication module and a second communication module. First, a first internet connection between the first communication module and the internet is established. Next, a second internet connection between the second communication module and the internet is established. Then, a local area connection between the first and second communication modules is established. The data to be transmitted are divided into several packets. A first part of the packets is transmitted from the first communication module to the destination through the first internet connection, and a second part of the packets is transmitted from the first communication module to the destination through the local area connection and the second internet connection.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: August 26, 2014
    Assignee: Pegatron Corporation
    Inventors: Li-Kang Yen, Chih-Hsien Hou, Ming-Hsin Kuo
  • Patent number: 8811544
    Abstract: Aspects of the invention include methods and devices for inserting data and pilot symbols into Orthogonal Frequency Division Multiplexing (OFDM) frames having a time domain and a frequency domain. A method involves inserting in at least one zone of a first type a two dimensional array of data and pilot symbols in time and frequency and inserting in at least one zone of a second type a two dimensional array of data and pilot symbols in time and frequency. In some implementations the zone of the first type comprises common pilot symbols that can be detected by all receivers receiving the OFDM frame. In some implementations the zone of the second type comprises dedicated pilot symbols that are only detectable by a receiver that is aware of pre-processing used to encode the dedicated pilot symbols.
    Type: Grant
    Filed: July 17, 2013
    Date of Patent: August 19, 2014
    Assignee: Apple Inc.
    Inventors: Jianglei Ma, Ming Jia, Wen Tong, Peiying Zhu, Hang Zhang, Mo-Han Fong
  • Patent number: 8792830
    Abstract: A carrier aggregation method in a wireless communication system and a corresponding apparatus, the method including using one baseband including two information and two radio frequency (RF) chains for aggregation of two component carriers at first and second frequency bands for each antenna port, switching the one baseband to at least one RF chain corresponding to the component carrier characteristic of the two RF chains upon use of the first frequency band, and transmitting a signal through the switched at least one RF chain.
    Type: Grant
    Filed: July 6, 2011
    Date of Patent: July 29, 2014
    Assignee: LG Electronics Inc.
    Inventors: Suhwan Lim, Manyoung Jung, Yoonoh Yang, Sangwook Lee
  • Patent number: 8787470
    Abstract: The receiver portion of a UWB wireless device is altered by replacing analog-to-digital circuitry with a simple energy detection circuit. In embodiments, the coding methodology of a transmitter is altered to support the simplified receiver configuration. For example, instead of coding the data to be sent in the phase of the UWB signal, the data is encoded in a binary fashion in discrete frequency subbands of the UWB signal. Although this may reduce the usable bandwidth of the channel, it also decreases the complexity and power consumption of UWB devices. In one or more embodiments, a UWB device is able to select a transmission mode (BPSK or Energy Coding) based on its environment. Moreover, in one or more embodiments, receiving devices may switch between coding modes based on the capabilities of a remote transmitter and/or a peer receiver.
    Type: Grant
    Filed: July 13, 2011
    Date of Patent: July 22, 2014
    Assignee: Microsoft Corporation
    Inventors: Amer A. Hassan, Jenelle R. Coberly
  • Patent number: 8781012
    Abstract: A method of transmitting a codebook index in a wireless communication system includes receiving a feedback index regarding an entity selected from a plurality of entities belonging to a feedback codebook, selecting a precoder from a precoding codebook using the feedback index, the precoding codebook comprising a plurality of precoders and transmitting a precoder index of the selected precoder. Flexibility can be given to codebook designs, and overhead due to the feedback of codebook indices can be reduced.
    Type: Grant
    Filed: March 21, 2008
    Date of Patent: July 15, 2014
    Assignee: LG Electronics Inc.
    Inventors: Wook Bong Lee, Bin Chul Ihm, Moon Il Lee, Hyun Soo Ko
  • Patent number: 8767852
    Abstract: A modulator modulates an input signal by a predetermined modulation scheme to generate a modulation signal. A serial-parallel converter performs serial-parallel conversion of the modulation signal and assigns the modulation signal to subcarriers with frequency components orthogonal to each other, thereby generating a subcarrier modulation signal. A synthesizer generates a baseband signal from the subcarrier modulation signal based on a predetermined transformation matrix. The predetermined transformation matrix is a matrix which indicates inverse discrete Fourier transformation and is divided into a plurality of square matrices identical in the number of rows and the number of columns, and in which elements other than elements of a plurality of diagonally positioned square matrices are set to 0. A transmitter generates a transmission signal from the baseband signal, and transmits the transmission signal to another apparatus via an antenna.
    Type: Grant
    Filed: June 25, 2012
    Date of Patent: July 1, 2014
    Assignee: Icom Incorporated
    Inventor: Nobuyoshi Nishikawa
  • Patent number: 8744005
    Abstract: A method of generating modulation signals is disclosed including generally three steps. A plurality of modulation signals are generated, each of which is to be transmitted from a different one of a plurality of antennas in an identical frequency band, wherein each modulation signal includes a pilot symbol sequence including a plurality of pilot symbols used for demodulation. Each of the pilot symbol sequences is inserted at the same temporal point in each modulation signal, wherein the pilot symbol sequences are orthogonal to each other with zero mutual correlation among the plurality of modulation signals, each pilot symbol having a non-zero amplitude, the quantity of the plurality of pilot symbols in each sequence being greater than the quantity of the plurality of modulation signals to be transmitted. The plurality of modulation signals each including different transmission data and one of the pilot symbol sequences are output to the antennas.
    Type: Grant
    Filed: September 5, 2013
    Date of Patent: June 3, 2014
    Assignee: Panasonic Corporation
    Inventors: Yutaka Murakami, Masayuki Orihashi, Akihiko Matsuoka
  • Patent number: 8718570
    Abstract: A method for transmitting and updating system information in a system that supports a legacy mobile station is disclosed. A method for transmitting system information according to one embodiment of the present invention comprises transmitting a super-map through a new zone of a super-frame, the super-map including channel description transmission control information indicating a channel descriptor of a legacy zone; and transmitting the channel descriptor and a map message through the legacy zone, the map message indicating the channel descriptor.
    Type: Grant
    Filed: April 6, 2009
    Date of Patent: May 6, 2014
    Assignee: LG Electronics Inc.
    Inventors: Hee Jeong Cho, Ki Seon Ryu
  • Patent number: 8705656
    Abstract: A transmission apparatus includes a plurality of orthogonal frequency division multiplexing (OFDM) modulation signal generators, which generate a first OFDM modulation signal and a second OFDM modulation signal. The transmission apparatus also includes a transmitter that transmits the first OFDM modulation signal from a first antenna and the second OFDM modulation signal from a second antenna, in an identical frequency band.
    Type: Grant
    Filed: April 18, 2013
    Date of Patent: April 22, 2014
    Assignee: Panasonic Corporation
    Inventors: Yutaka Murakami, Masayuki Orihashi, Akihiko Matsuoka
  • Patent number: 8706037
    Abstract: Generally, aspects of the present disclosure are directed to techniques for determining a transport mechanism to transfer data peer-to-peer between computing devices. One or more alternative transport mechanisms supported by both a first computing device and a second computing device may be determined. The first computing device may determine whether to use one of near-field communication (NFC) and one of the one or more alternative transport mechanisms as a transport mechanism to transfer data between the first computing device and the second computing device based at least in part on at least one attribute of the data to be transferred. Data may be transferred between the first computing device and the second computing device using the transport mechanism.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: April 22, 2014
    Assignee: Google Inc.
    Inventors: Robert William Hamilton, Martijn Franciscus Agnes Coenen, Jeffrey William Hamilton, Nicholas Julian Pelly, Rachel Leah Garb
  • Patent number: 8705643
    Abstract: A method of channel estimation for a control channel in an OFDM system of the present invention includes the steps of: performing weighted averaging over time of input LS estimates of a plurality of channel condition matrices; performing frequency domain averaging on the input LS estimates; performing channel estimates on multiple subcarriers of pilot OFDM symbols from the frequency domain averaged input LS estimates; and performing channel estimates on multiple subcarriers of OFDM symbols in the control channel from the channel estimates on the subcarriers of pilot OFDM symbols.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: April 22, 2014
    Assignee: NEC Corporation
    Inventors: Kanagaratnam Sathananthan, Phong Nguyen, Huei-Ming Lin
  • Patent number: 8699319
    Abstract: A base station device may include, but is not limited to: a mapping unit; and at least one reception antenna. The mapping unit is configured to assign a plurality of first subcarriers to a first communication device, and assign a part of the plurality of first subcarriers to at least one other communication device. The at least one reception antenna is configured to receive from one of the first communication device and the at least one other communication device, a plurality of frequency signals allocated to the plurality of first subcarriers. Each of the plurality of frequency signals is converted from coded transmission data of the one of the first communication device and the at least one other communication device.
    Type: Grant
    Filed: August 13, 2008
    Date of Patent: April 15, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kazunari Yokomakura, Yasuhiro Hamaguchi, Shimpei To, Minoru Kubota, Hideo Namba, Seiichi Sampei, Shinichi Miyamoto, Shinsuke Ibi
  • Patent number: 8682266
    Abstract: A system, apparatus, method and article to manage diversity for a wireless multicarrier communication system are described. An apparatus may include a diversity agent to couple to a transmitter, the diversity agent to convert a determined number of input bits into symbols, interleave the symbols across multiple spatial streams, and map the symbols to tones for each spatial stream. Other embodiments are described and claimed.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: March 25, 2014
    Assignee: Intel Corporation
    Inventors: Nageen Himayat, Sumeet Sandhu
  • Patent number: 8675750
    Abstract: There are provided an apparatus and a method for reducing a peak to average power ratio (PAPR) through the recombination of an orthogonal frequency division multiplexing (OFDM) symbol. The apparatus includes an orthogonal frequency division multiplexing (OFDM) symbol transforming unit, a peak power measuring unit, and an OFDM symbol selecting unit, wherein the OFDM symbol transforming unit generates the plurality of OFDM symbols by (a) performing a process of rotating the OFDM symbol by a predetermined angle in a complex plane and performing cyclical shifting with respect to the rotated OFDM symbol and (b) repetitively performing process (a) with respect to the cyclically shifted OFDM symbol. Therefore, diversity is secured, whereby the PAPR may be reduced.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: March 18, 2014
    Assignees: Samsung Electro-Mechanics Co., Ltd., Korea University Industrial & Academic Collaboration Foundation
    Inventors: Joun Sup Park, Chul Gyun Park, Young Chai Ko, Seung Sik Eum
  • Patent number: 8660197
    Abstract: For compensating carrier frequency generation in communication equipment for radio transmission in an Orthogonal Frequency Division Multiplex, OFDM, based wireless radio communication system, in which reference signals known communication equipment are transmitted in a regular time repetitive manner, carrier frequency generation is compensated (63) by a calculated carrier frequency offset estimate. The carrier frequency offset estimate in the communication equipment is calculated from coarse (61) and fine carrier frequency offset estimates (62). The coarse carrier frequency offset estimate (61) is calculated in the frequency domain from reference symbols of a reference signal received (60) at the communication equipment and the fine carrier frequency offset estimate (62) is calculated in the time domain from reference symbols of reference signals repetitively received (60) at said communication equipment. An algorithm and an estimator module (90) for calculating a coarse carrier frequency offset are provided.
    Type: Grant
    Filed: March 6, 2009
    Date of Patent: February 25, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Ulf Lindgren, Henrik Sahlin
  • Patent number: 8649448
    Abstract: Disclosed herein is a demapping device and method for a Modified Dual Carrier Modulation (MDCM) system. The demapping device comprises: the received signal processing unit receives an MDCM signal preprocessed by an operation preparation unit, and calculates differences between squares of distances between the received signal and a plurality of constellation points; the index search unit searches for a constellation point closest to the received signal based on the differences between squares of distances between the received signal and each of a plurality of constellation points; and the demapping operation unit searches for constellation points close to the closest constellation point, and sends demapping result data to a decoding device. The demapping result is obtained by demapping based on differences between squares of distances between the closest constellation point and the close constellation points.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: February 11, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventor: Byoung-Hak Kim
  • Patent number: 8644411
    Abstract: A multi-user MIMO downlink beamforming system (200) is provided to enable transmit beamforming vectors to be efficiently provided to a subset of user equipment devices (201.i), where spatial separation or zero-forcing transmit beamformers (wi) are computed at the base station (210) and used to generate precoded reference signals (216). The precoded reference signals (216) are fed forward to the user equipment devices (201.i) which apply one or more hypothesis tests (207.i, 208.i) to the precoded reference signals to extract the precoding matrix (W), including the specific transmit beamforming vector (wUE) designed for the user equipment, and this extracted information is used to generate receive beamformers (vi).
    Type: Grant
    Filed: June 11, 2012
    Date of Patent: February 4, 2014
    Assignee: Apple Inc.
    Inventors: Jayesh H. Kotecha, Jayakrishnan C. Mundarath
  • Patent number: 8644399
    Abstract: It is desired to suitably carry out transmission processing and reception processing carried out when transmitting a multicarrier signal where specific subcarriers are omitted. Therefore, the present invention carries out transmission avoidance processing operable when transmitting a multicarrier signal to replace signals corresponding to subcarriers, in a plurality of subcarriers, at frequency positions where transmission is avoided with a null signal. Subsequently, an inverse Fourier transform is carried out on the output of the transmission avoidance processing, the transmission power of the multicarrier signal that has been transformed is amplified in accordance with the number of subcarriers replaced with the null signal and the multicarrier signal is transmitted.
    Type: Grant
    Filed: June 13, 2007
    Date of Patent: February 4, 2014
    Assignee: Sony Corporation
    Inventors: Hiroyuki Yamasuge, Takashi Usui
  • Patent number: 8644765
    Abstract: In one or more aspects data packets are iteratively transmitted to a receiver using predefined spatial mapping matrices, channel estimates are received from the receiver responsive to the iteratively transmitted data packets, and one of the predefined spatial mapping matrices is selected for transmitting additional data packets to the receiver based on the received channel estimates.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: February 4, 2014
    Assignee: Marvell World Trade Ltd.
    Inventors: Hongyuan Zhang, Rohit U Nabar
  • Patent number: 8639284
    Abstract: A system and method providing concurrent multimode communication through multimode signal multiplexing. Various aspects of the present invention may comprise, during a first time period, transmitting a first portion of a first communication in a first communication mode in a serial wireless transmission stream. During a second time period after the first time period, a first portion of a second communication may be transmitted in a second communication mode in the serial wireless transmission stream. Also, during a third time period after the second time period, a second portion of the first communication may be transmitted in the first communication mode in the serial wireless transmission stream. In an exemplary scenario, prior to communicating various communications, transmission time may be allocated between the first and second communication modes. In another exemplary scenario, transmission may be switched between a plurality of communication modes in response to detected communication conditions.
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: January 28, 2014
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Arya Behzad
  • Patent number: 8630363
    Abstract: The system (900), transmitter (700), receiver (800.a 800.b), and method of the present invention provide a technique to code data bits into symbols using TCM, MLCM or BIMLCM before the symbols are placed in an SCBT block. Generally, TCM, MLCM, and BIMLCM do not have good performance over the frequency selective channels. However, since the frequency domain equalization of SCBT will flatten the channel, the use of TCM, MLCM and BIMLCM can provide significant gain. Furthermore, since some of the bits are left uncoded, the speed requirements on the encoder and decoder can be relaxed. This feature is especially important for the very high data rate systems.
    Type: Grant
    Filed: October 25, 2007
    Date of Patent: January 14, 2014
    Assignee: Koninklike Philips N.V.
    Inventors: Seyed-Alireza Seyedi-Esfahani, Dagnachew Birru
  • Patent number: 8625684
    Abstract: A method for estimating a symbol timing offset in an Orthogonal Frequency Division Multiplexing (OFDM) communication system is disclosed. The method includes detecting a channel impulse response within one Fast Fourier Transform (FFT) duration; and estimating a symbol timing offset taking the detected channel impulse response into account. The symbol timing offset estimation includes calculating a channel delay duration depending on the detected channel impulse response; and estimating the symbol timing offset such that the channel impulse response is detected within a guard interval, taking into account the calculated channel delay duration and the guard interval existing in the one FFT duration.
    Type: Grant
    Filed: March 6, 2007
    Date of Patent: January 7, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Kwang-Chul Kim
  • Patent number: 8619890
    Abstract: A data processing apparatus maps input symbols to be communicated onto a predetermined number of sub-carrier signals of an Orthogonal Frequency Division Multiplexed (OFDM) symbol. The data processor includes an interleaver memory which reads-in the predetermined number of data symbols for mapping onto the OFDM sub-carrier signals. The interleaver memory reads-out the data symbols on to the OFDM sub-carriers to effect the mapping, the read-out being in a different order than the read-in, the order being determined from a set of addresses, with the effect that the data symbols are interleaved on to the sub-carrier signals. The set of addresses are generated from an address generator which comprises a linear feedback shift register and a permutation circuit.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: December 31, 2013
    Assignee: Sony Corporation
    Inventors: Samuel Asanbeng Atungsiri, Matthew Paul Athol Taylor, John Nicholas Wilson
  • Patent number: 8599941
    Abstract: Continuous-phase high compaction multicarrier-modulation (CPPC/HC-MCM) according to the present application uses a continuous phase modulation (CPM) technique to prevent an amplitude gap between two continuous signals, thereby improving characteristics of the conventional PC/HC-MCM in terms of effective use of a frequency bandwidth. The CPPC/HC-MCM can achieve a lower bit error rate (BER) for a wide signal-to-noise ratio at a common spectral efficiency of about 0.33 or less, as compared to the conventional unmodulated PC/HC-MCM.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: December 3, 2013
    Assignee: Kochi University of Technology
    Inventor: Masanori Hamamura
  • Patent number: 8594242
    Abstract: A method for receiving modulation signals includes receiving a plurality of multiplexed modulation signals each transmitted from multiple antennas of a communication partner, wherein each modulation signal includes a pilot symbol sequence consisting of plural pilot symbols used for demodulation. Each of the pilot symbol sequences is inserted at the same temporal points in the each modulation signal. The pilot symbol sequences are orthogonal to each other with zero cross correlation among the plurality of modulation signals, each pilot symbol having a non-zero amplitude, the quantity of the plural pilot symbols in each sequence being greater than the quantity of the plurality of transmitted modulation signals.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: November 26, 2013
    Assignee: Panasonic Corporation
    Inventors: Yutaka Murakami, Masayuki Orihashi, Akihiko Matsuoka
  • Patent number: 8582694
    Abstract: The present invention provides a high-performance adaptive digital receiver with adaptive background control that optimizes the performance in rapidly changing signal environments and provides 3.6 GH; instantaneous bandwidth, SFDR>90 dB, SNR=66 dB, with dynamic digital channelization. The receiver takes advantage of several levels of adaptivity that conventional approaches do not offer. In addition to a dynamic digital channelizer that is adaptively tuned based on detected signals, the present invention employs a powerful software reconfigurable digitizer that is adaptively optimized for the current signal environment to control important receiver parameters such as bandwidth, dynamic range, resolution, and sensitivity.
    Type: Grant
    Filed: April 24, 2012
    Date of Patent: November 12, 2013
    Inventors: Scott R. Velazquez, Rich J. Velazquez
  • Patent number: 8559877
    Abstract: A radio base station (100) is provided with a stream determination unit (141) for determining whether communication quality of a radio communication channel between the radio base station (100) and a receiving device is lower than a predetermined threshold, and an antenna selector (142) for selecting, from among transmitting antennas (131-134), transmitting antennas such that the distance between the transmitting antennas (131-134) becomes shorter than that before the communication quality is determined to be lower than the predetermined threshold when the communication quality is determined to be lower than the predetermined threshold.
    Type: Grant
    Filed: June 25, 2009
    Date of Patent: October 15, 2013
    Assignee: Kyocera Corporation
    Inventors: Yoshimasa Kusano, Taku Nakayama
  • Patent number: 8559547
    Abstract: An access node is configured to control crosstalk between an activating channel associated with a first terminal and active channels associated with respective other terminals. The access node detects a control signal sent by the first terminal over the activating channel in a designated phase of an initialization process of the first terminal, determines an error signal from the detected control signal, correlates the error signal with one or more corresponding signals sent by respective ones of the other terminals over the active channels, estimates crosstalk from the active channels into the activating channel based on the correlation, and configures a vectoring signal processing module to control the estimated crosstalk. The control signal sent by the first terminal comprises a value selected by the first terminal from a set of two or more values and prior to its detection the particular selected value is unknown to the access node.
    Type: Grant
    Filed: October 1, 2010
    Date of Patent: October 15, 2013
    Assignee: Alcatel Lucent
    Inventors: Carl J. Nuzman, Adriaan J. de Lind van Wijngaarden
  • Patent number: 8548074
    Abstract: A Synchronization Channel (SCH) transmission method includes generating a Primary SCH (P-SCH) sequence according to supplementary information. The supplementary information includes at least one of Base Station (BS) type information, Fast Fourier Transform (FFT) size information, BandWidth (BW) information, group information, sector information, and carrier type information. The method also includes modulating the P-SCH sequence and mapping the modulated P-SCH sequence to subcarriers within a predefined subcarrier set. The subcarriers are included in the subcarrier set being spaced one subcarrier interval apart. The method further includes generating a P-SCH symbol by Orthogonal Frequency Division Multiplexing (OFDM)-modulating the P-SCH sequence mapped to the subcarriers, and transmitting the P-SCH symbol.
    Type: Grant
    Filed: January 6, 2010
    Date of Patent: October 1, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-Eun Park, Jae-Weon Cho, Seung-Hoon Choi, Chi-Woo Lim, Song-Nam Hong
  • Patent number: 8542771
    Abstract: Aspects of the invention include methods and devices for inserting data and pilot symbols into Orthogonal Frequency Division Multiplexing (OFDM) frames having a time domain and a frequency domain. A method involves inserting in at least one zone of a first type a two dimensional array of data and pilot symbols in time and frequency and inserting in at least one zone of a second type a two dimensional array of data and pilot symbols in time and frequency. In some implementations the zone of the first type comprises common pilot symbols that can be detected by all receivers receiving the OFDM frame. In some implementations the zone of the second type comprises dedicated pilot symbols that are only detectable by a receiver that is aware of pre-processing used to encode the dedicated pilot symbols.
    Type: Grant
    Filed: November 9, 2011
    Date of Patent: September 24, 2013
    Assignee: Apple Inc.
    Inventors: Jianglei Ma, Ming Jia, Wen Tong, Peiying Zhu, Hang Zhang, Mo-Han Fong
  • Patent number: 8526878
    Abstract: A channel response matrix is obtained by performing a training process between a transmitter 401 and a receiver 402 to obtain optimal signal phases of the antenna array. Next, a singular-value decomposition (SVD) process is performed to decompose the channel response matrix into a correlation matrix and eigenvalues. Next, a diagonal matrix having square roots of the eigenvalues as its components is obtained. Next, all but one of diagonal components included in the diagonal matrix are replaced with zeros, and optimal setting of the amplitudes and phases of signals to be applied to the antenna array (antenna weight vector) for use in wireless communication between the transmitter and the receiver is obtained based on a channel response matrix that is reconstructed by using the component-replaced diagonal matrix. In this way, when wireless communication is implemented by performing beam forming, the time necessary to find and set a beam direction can be reduced.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: September 3, 2013
    Assignee: NEC Corporation
    Inventors: Kenichi Maruhashi, Naoyuki Orihashi, Kenichi Hosoya