Multilevel Patents (Class 375/264)
  • Patent number: 10498481
    Abstract: A method of new radio physical broadcast channel (NR-PBCH) bit mapping is proposed to improve for NR-PBCH decoding performance under Polar codes. NR-PBCH carries 32 information bits and 24 CRC bits. Specifically, NR-PBCH uses 512-bit Polar codes to carry total 56 data bits. Different Polar code bit channels have different channel reliability. As a general rule, the most reliable Polar code bit channels are used for the 56 data bits. In accordance with a novel aspect, within the 32 NR-PBCH information bits, some of the information bits that can be known to the decoders under certain conditions and therefore are placed at the least reliable Polar code bit positions. As a result, by mapping the NR-PBCH data bits properly at the input bit positions of Polar codes, the NR-PBCH decoding performance is improved when the known bits a priori can be exploited.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: December 3, 2019
    Assignee: MEDIATEK INC.
    Inventors: Wei-De Wu, Chia-Wei Tai, Tao Chen, Yen-Cheng Liu, Xiu-Sheng Li, Wei-Jen Chen
  • Patent number: 10243735
    Abstract: Communication devices and a method of providing secure electronic content are general described. A plainmodulation containing user content is encrypted using a modulation key to form a ciphermodulation having a different magnitude and/or phase than the plainmodulation. Symbol representations of the plainmodulation and ciphermodulation in a QAM constellation are different. The ciphermodulation symbol representation is in a location non-coincident with an expected QAM constellation symbol. The symbol location of different plainmodulations when encypted using different modulation keys may be the same such that the corresponding ciphermodulation symbol representations are co-located. Different modulation keys are used for different plainmodulations, with a modulation key change occurring after transmission of a predetermined number of ciphermodulations and/or time. The modulation key and/or change is transmitted to enable coherent demodulation of the ciphermodulation to be performed.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: March 26, 2019
    Assignee: Raytheon Company
    Inventors: Andrew Kowalevicz, Gary M. Graceffo
  • Patent number: 10230557
    Abstract: The present invention provides a methods, apparatus and systems for improving a systems-level data rate on a communications link such theorthogonal frequency division multiplexed multiple access (OFDMA) downlink used in used in WiFi and LTE cellular/wireless mobile data applications. The present invention preferably uses a form of multilevel coding and decoding known as tiled-building-block encoding/decoding. With the present invention, different receivers coupled to different parallel downlink channels with different channel qualities decode different received signal constellations at different levels of resolution. This allows the downlink of the OFDMA system to operate with a significantly higher data rate, thus eliminating existing inefficiencies in the downlink and significantly increasing system level bandwidth efficiency.
    Type: Grant
    Filed: May 21, 2018
    Date of Patent: March 12, 2019
    Inventors: Muhammad Ahsan Naim, John P. Fonseka
  • Patent number: 10038533
    Abstract: The present invention discloses a pilot frequency position determining method based on pilot frequency interval optimization and a transceiver device. The method optimizes a pilot frequency position on the basis of better use of pilot frequency in a wireless system for sampling frequency synchronization and residual phase tracking. After an optimal pilot frequency position is obtained according to the method, a transmitting terminal inserts a pilot frequency sequence at a corresponding pilot frequency position, a receiving terminal learns the pilot frequency position and the pilot frequency sequence, and after channel equalization, deviation is tracked by means of coherent detection of a local sequence. For the aforementioned method, the present invention further provides a transceiver device of a related pilot frequency module in the wireless system.
    Type: Grant
    Filed: January 20, 2015
    Date of Patent: July 31, 2018
    Assignee: ZTE Wavetone Science and Technology Ltd.
    Inventors: Haiming Wang, Lin Tian, Shiwen He, Yu Wang, Yongming Huang, Jun Zhang
  • Patent number: 10033480
    Abstract: SISO decoding of a reception signal having a scrambled symbol arrangement is realized using a process having reduced complexity. Coordinates are generated for a reference point obtained by scrambling and mapping a symbol number not a symbol reference point position. This reference point simulates transmission-side scrambling and is generated for each symbol number by a first mapping unit. Because the binary expression of a corresponding original signal number is retained, a bit likelihood calculation unit can easily calculate a bit likelihood based on the distance between the reference point and a reception signal. The calculated bit likelihood is then deinterleaved and subjected to SISO error-correcting decoding. The thus obtained bit likelihood is then reinterleaved and used to calculate a symbol probability. Soft symbols are generated through the multiplication of all the calculated symbol probabilities by corresponding reference points output by a second mapping unit similar to the first mapping unit.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: July 24, 2018
    Assignee: HITACHI KOKUSAI ELECTRIC INC.
    Inventor: Kei Ito
  • Patent number: 9979577
    Abstract: The present invention provides a methods, apparatus and systems for improving a systems-level data rate on a communications link such the orthogonal frequency division multiplexed multiple access (OFDMA) downlink used in used in WiFi and LTE cellular/wireless mobile data applications. The present invention preferably uses a form of multilevel coding and decoding known as tiled-building-block encoding/decoding. With the present invention, different receivers coupled to different parallel downlink channels with different channel qualities decode different received signal constellations at different levels of resolution. This allows the downlink of the OFDMA system to operate with a significantly higher data rate, thus eliminating existing inefficiencies in the downlink and significantly increasing system level bandwidth efficiency.
    Type: Grant
    Filed: May 29, 2017
    Date of Patent: May 22, 2018
    Inventors: Muhammad Ahsan Naim, John P. Fonseka
  • Patent number: 9667459
    Abstract: The present invention provides a methods, apparatus and systems for improving a systems-level data rate on a communications link such the orthogonal frequency division multiplexed multiple access (OFDMA) downlink used in used in WiFi and LTE cellular/wireless mobile data applications. The present invention preferably uses a form of multilevel coding and decoding known as tiled-building-block encoding/decoding. With the present invention, different receivers coupled to different parallel downlink channels with different channel qualities decode different received signal constellations at different levels of resolution. This allows the downlink of the OFDMA system to operate with a significantly higher data rate, thus eliminating existing inefficiencies in the downlink and significantly increasing system level bandwidth efficiency.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: May 30, 2017
    Inventors: Muhammad Ahsan Naim, John P Fonseka
  • Patent number: 9635639
    Abstract: A paging indicator transmission method for a mobile communication system includes the following steps. In step S1, a set of terminals are paged by grouping paging indicators, and paging indicators PCH of the terminals are carried by paging indicator channels PICH. The paging indicator channel PICH of each cell utilizes the same burst structure, and the paging indicators PCH are located at known locations at one side or two sides of a training sequence and are coded by repeated coding. In step S2, the terminal controls its RF component to receive data. The received data includes the training sequence in the timeslot where the paging indicator channel PICH is located, one or two paging indicators corresponding to the terminal, and data between the training sequence and the one or two paging indicators corresponding to the terminal.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: April 25, 2017
    Assignee: MSTAR SEMICONDUCTOR, INC.
    Inventor: Hu-Jian Xu
  • Patent number: 9313076
    Abstract: An antenna modulation method applicable to a transmitter comprising a processing unit which is configured to execute functions including at least but not limited to receiving a symbol represented by a bit stream; converting the bit stream into a coordinate point of a signal constellation comprising a horizontal-axis component and a vertical-axis component; converting, from the horizontal-axis component of the coordinate point, a first vector having at least a first entry and a second entry; converting, from the vertical-axis component of the coordinate point, a second vector having at least a third entry and a fourth entry; generating a third vector having at least a fifth entry and a sixth entry by summing the first vector and the second vector; and activating at least one of the first antenna and the second antennas based on one or more non-zero entries of the third vector.
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: April 12, 2016
    Assignee: Industrial Technology Research Institute
    Inventor: Ping-Heng Kuo
  • Patent number: 9258157
    Abstract: A method of mapping a plurality of different bit sequences to a plurality of different signal points in a constellation, the number of bit sequences being greater than the number of signal points. The method includes, for a device in a telecommunication network, the acts of: determining, for each signal point in the constellation, a number of bit sequences to be mapped to each signal point, the numbers of bit sequences being distributed according to a discrete Gaussian distribution among the constellation, selecting in the plurality of bit sequences, for each signal point in the constellation, a set including the determined number of bit sequences (u) that minimize the maximal Hamming distance among the selected sets.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: February 9, 2016
    Assignee: Orange
    Inventors: Baoming Bai, Lin Zhou, Yajuan Luo
  • Patent number: 9252835
    Abstract: Methods and systems to modulate and demodulate first and second path bits within sequences of pulses, where each pulse represents first and second path bits and is position-modulated and phase-modulated based on binary values of the corresponding bits, with no more than 1 phase change per N pulses. Position-modulation may be based on first-path bits. Phase-modulation may be based on second-path bits. A modulator first path has an input data rate Q times that of a second path. The first may include an N-bit encoder. The second path may include a Q-bit encoder and an N-bit repetition encoder. A demodulator includes a first path to determine first path bit values based on pulse coordinates integrated over N frames, and a second path to determine second path bit values based on further integration over Q frames.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: February 2, 2016
    Assignee: Intel Corporation
    Inventors: Eugine Bakin, Maksim Grankin, Grigory Evseev, Andrey Turlikov
  • Patent number: 9209834
    Abstract: The present disclosure presents symbol mapping for any desired error correction code (ECC) and/or uncoded modulation. A cross-shaped constellation is employed to perform symbol mapping. The cross-shaped constellation is generated from a rectangle-shaped constellation. Considering the rectangle-shaped constellation and its left hand side, a first constellation point subset located along that left hand side are moved to be along a top of the cross-shaped constellation while a second constellation point subset located along that left hand side are moved to be along a bottom of the cross-shaped constellation. For example, considering an embodiment having four constellation point subsets along the left hand side of the rectangle-shaped constellation, two of those subsets are moved to be along the top of the cross-shaped constellation while two other subsets of the constellation points along the left hand side are moved to be along the bottom of the cross-shaped constellation.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: December 8, 2015
    Assignee: Broadcom Corporation
    Inventors: Tak K. Lee, Ba-Zhong Shen, Kelly Brian Cameron, Hau Thien Tran
  • Patent number: 9136960
    Abstract: A digital broadcast transmitting/receiving system and a method for processing data are disclosed. The method for processing data may enhance the receiving performance of the receiving system by performing additional coding and multiplexing processes on the traffic information data and transmitting the processed data. Thus, robustness is provided to the traffic information data, thereby enabling the data to respond strongly against the channel environment which is always under constant and vast change.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: September 15, 2015
    Assignee: LG ELECTRONICS INC.
    Inventors: Jin Pil Kim, Young In Kim, Ho Taek Hong, In Hwan Choi, Kook Yeon Kwak, Hyoung Gon Lee, Byoung Gill Kim, Jin Woo Kim, Jong Moon Kim, Won Gyu Song
  • Patent number: 9106486
    Abstract: A transmission method includes generating first symbols for transmitting data, a signal point of each of the first symbols on an in-phase and quadrature-phase plane comprising an in-phase component and a quadrature-phase component and generating a second symbol, the second symbol being a pilot symbol. The method further includes selecting an insertion pattern of the second symbol, from a plurality of predetermined insertion patterns, inserting the second symbol in the first symbols based on the selected insertion pattern to generate a transmission signal, and transmitting the transmission signal. The first symbols are generated using a modulation scheme selected from a plurality of modulation schemes.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: August 11, 2015
    Assignee: Wi-Fi One, LLC
    Inventors: Yutaka Murakami, Shinichiro Takabayashi, Masayuki Orihashi, Akihiko Matsuoka
  • Patent number: 9025686
    Abstract: The present invention relates to clipping thresholds adjustment for Crest Factor Reduction CFR in a radio unit, wherein the radio unit comprises one or more clipping stages that apply respective clipping thresholds to clip input signals, comprising: determining a target threshold for the clipping stages based on a target PAR and the amplitudes or powers of the input signals, estimating the direction in which original PAR of the input signals changes by comparing amplitudes of the clipped signals from the clipping stages with the target threshold, and adjusting the clipping thresholds based on the estimated direction. The present invention also relates to dynamic stage control. With the present invention, clipping thresholds and clipping stages are adaptively changes with dynamic original PAR of input signals and the efficiency of power amplifier is increased with a low implementation cost.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: May 5, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventor: Tao Gu
  • Patent number: 9008241
    Abstract: Methods, apparatuses, and systems are provided for generating a candidate search set for ML detection of 2n-QAM signals transmitted on two or more MIMO spatial streams. A method includes estimating an initial solution yq for a received 2n-QAM symbol value b0b1 . . . bn-1, wherein all possible 2n-QAM symbol values are Gray-mapped constellation points; and performing an iteration for each hypothetical value of each bit position i of the initial solution yq, wherein each iteration comprises: determining a search center as: if ith bit of the initial solution equals the hypothetical value assumed for the current iteration, the initial solution yq; or if ith bit of the initial solution does not equal the hypothetical value assumed for the current iteration, a mirror constellation point yqc to the initial solution yq; and searching outward from the determined search center for candidate constellation points.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: April 14, 2015
    Assignee: Samsung Electronics Co., Ltd
    Inventor: Fei Tong
  • Patent number: 9008036
    Abstract: The present invention employs a pilot scheme for frequency division multiple access (FDM) communication systems, such as single carrier FDM communication systems. A given transmit time interval will include numerous traffic symbols and two or more short pilot symbols, which are spaced apart from one another by at least one traffic symbol and will have a Fourier transform length that is less than the Fourier transform length of any given traffic symbol. Multiple transmitters will generate pilot information and modulate the pilot information onto sub-carriers of the short pilot symbols in an orthogonal manner. Each transmitter may use different sub-carriers within the time and frequency domain, which is encompassed by the short pilot symbols within the transmit time interval. Alternatively, each transmitter may uniquely encode the pilot information using a unique code division multiplexed code and modulate the encoded pilot information onto common sub-carriers of the short pilot symbols.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: April 14, 2015
    Assignee: Apple Inc.
    Inventors: Jianglei Ma, Ming Jia, Hua Xu, Wen Tong, Peiying Zhu, Moussa Abdi
  • Patent number: 9008201
    Abstract: When a UE (12) is configured with MF-HSDPA and HARQ-ACK information associated with cells (14, 16) (characterized by potentially different downlink timing) is jointly encoded, only part of the existing Rel-9 HARQ-ACK codebook is reused. In one embodiment, only the codebook conflict arising from reuse of encodings is resolved. This is achieved by introducing a new codeword for at least one of the HARQ-ACK code words that are used multiple times in the existing Rel-9 codebook. In another embodiment, all codewords in the Rel-9 HARQ-ACK codebook having a Hamming distance smaller than a predetermined value (but not all codewords) are replaced. In yet another embodiment, all codewords in the Rel-9 HARQ-ACK codebook having a Hamming distance smaller than a predetermined value (but not all codewords) that would cause ambiguity at the NodeB receiver (i.e. where the interpretation of the HARQ-ACK information for one cell (14) depends on the number of streams transmitted at the other cell (16)) are replaced.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: April 14, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Johan Hultell, Peter von Wrycza
  • Patent number: 8976890
    Abstract: A multilevel amplitude modulation device for generating, from digital data, a multilevel amplitude modulation signal having four or more signal levels and outputting the generated signal, including: an average level calculator that selects one of a plurality of preliminarily prepared different candidates for a code word building method such that average level of a symbol array, obtained by adding a symbol for a code word of digital data to be transmitted to one or more already outputted symbols included in a multilevel amplitude modulation signal already outputted, is most approximate to voltage center of the four or more signal levels, and outputs a selection signal indicating the selected method; a signal converter that forms a codeword of the digital data in accordance with the method indicated by the selection signal; and a multilevel modulator that generates a multilevel amplitude modulation signal using the codeword and outputs the generated signal.
    Type: Grant
    Filed: May 13, 2013
    Date of Patent: March 10, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Tsuyoshi Ikushima, Osamu Shibata
  • Patent number: 8976847
    Abstract: A communications system provides a first communications device, which is connected via a bidirectional transmission channel to a second communications device, wherein the communications devices each comprise a data reconstruction unit. Each communications device comprises a control unit, which is provided for a configuration of various transmission parameters such as modulation type and/or code rate and/or transmitter power and/or size of data packets dependent upon a reliability value evaluated within the control unit. The reliability value indicates a probability for a reliability or a quality of a data reconstruction, which reconstructs transmitted data from received signals within the data reconstruction unit.
    Type: Grant
    Filed: May 20, 2008
    Date of Patent: March 10, 2015
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Henrik Schober, Torsten Langguth
  • Patent number: 8971448
    Abstract: This invention is a method and an apparatus to up link transmission of data from a user equipment to a base station for single user multiple input, multiple output. This invention includes receiving at least one codeword, permuting the received codewords, precoding the permuted codewords and transmitting the predecoded codewords on plural antennas. The codewords may be permuted by layer permutation or by codeword permutation.
    Type: Grant
    Filed: January 25, 2010
    Date of Patent: March 3, 2015
    Assignee: Texas Instruments Incorporated
    Inventors: Eko N. Onggosanusi, Zukang Shen, Runhua Chen
  • Patent number: 8942327
    Abstract: The present invention employs hierarchical modulation to simultaneously transmit information on different modulation layers using a carrier RF signal. Initially, first data to be transmitted is assigned to a first modulation layer and second data is assigned to a second modulation layer. In one embodiment of the present invention, the first and second data are assigned based on reliability criteria. The first and second modulation layers are hierarchical modulation layers of the carrier RF signal. Once assigned, the first data is transmitted using the first modulation layer of the carrier RF signal and the second data is transmitted using the second modulation layer of the carrier RF signal. In one embodiment of the present invention, information may be transmitted to one end user using one modulation layer, and information may be transmitted to a different end user using a different modulation layer.
    Type: Grant
    Filed: October 11, 2012
    Date of Patent: January 27, 2015
    Assignee: Apple Inc.
    Inventors: Ming Jia, Jianglei Ma, Peiying Zhu, Wen Tong, Curt Dodd
  • Patent number: 8885696
    Abstract: Systems, methods, and devices enable spectrum management by identifying, classifying, and cataloging signals of interest based on radio frequency measurements. In an embodiment, signals and the parameters of the signals may be identified and indications of available frequencies may be presented to a user. In another embodiment, the protocols of signals may also be identified. In a further embodiment, the modulation of signals, data types carried by the signals, and estimated signal origins may be identified.
    Type: Grant
    Filed: July 11, 2014
    Date of Patent: November 11, 2014
    Assignee: DGS Global Systems, Inc.
    Inventors: Gabriel R. Garcia, Daniel Carbajal
  • Patent number: 8885758
    Abstract: The present invention provides a data stream processing method, device, and system. The data stream processing method includes: using a precoding parameter to perform precoding processing on an lth to-be-sent data stream of a current kth transmitting device, where the lth to-be-sent data stream includes a lattice point data stream mapped to a lattice grid; and sending the precoded lth to-be-sent data stream to a kth receiving device, where both l and k are positive integers. The technical solutions in the embodiments of the present invention can be helpful for filtering out interference, exactly complies with an actual processing procedure of an interfering data stream, and have strong practicability.
    Type: Grant
    Filed: December 12, 2012
    Date of Patent: November 11, 2014
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Huang Huang, Kin Nang Lau, Yinggang Du
  • Patent number: 8873652
    Abstract: In a method for generating a physical layer (PHY) data unit for transmission via a communication channel, a plurality of information bits to be included in the PHY data unit is received. A number of padding bits that need to be added to the information bits such that the information bits, after having been encoded, fill an integer number of orthogonal frequency division multiplexing (OFDM) symbols is determined. The number of padding bits is added to the information bits prior to encoding and the information bits are parsed to a number of encoders. The information bits are encoded to generate coded data bits. A last block of the data unit is encoded differently from the previous blocks. The PHY data unit to include the coded data bits is generated.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: October 28, 2014
    Assignee: Marvell World Trade Ltd
    Inventors: Sudhir Srinivasa, Hongyuan Zhang
  • Patent number: 8867656
    Abstract: When a determination is made that communication by an SM scheme is suitable, a setting unit performs switching from a communication level by an STC scheme to the communication level by the SM scheme, between the communication level at a first level of MCS by the space-time coding scheme and the communication level at a second level of MCS by the SM scheme. When a determination is made that communication by the SM scheme is unsuitable, the setting unit performs switching from the communication level by the STC scheme to the communication level by the spatial multiplexing scheme, between the communication level at a third level of MCS, which is higher than the first level, by the space-time coding scheme and a fourth level of the modulation scheme and the coding rate, which is higher than the second level, by the SM scheme.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: October 21, 2014
    Assignee: KYOCERA Corporation
    Inventor: Takeo Miyata
  • Patent number: 8861662
    Abstract: A method includes receiving reference signals in a mobile communication terminal, which is designed to receive data-carrying signals that are transmitted from a base station using one of multiple predefined Modulation and Coding Schemes (MCSs). One or more pre-calculated mappings between Signal-to-Noise Ratio (SNR) and error rate for one or more of the MCSs are held in the communication terminal. The pre-calculated mappings are adjusted according to one or more transmission parameters of the data-carrying signals. Measures indicative of respective actual spectral efficiencies that are achievable by the MCSs are estimated based on the adjusted mappings using the received reference signals. A preferred MCS is selected based on the estimated measures, and feedback that is indicative of the preferred MCS is sent to the base station.
    Type: Grant
    Filed: February 13, 2014
    Date of Patent: October 14, 2014
    Assignee: Marvell International Ltd.
    Inventors: Yona Perets, Daniel Yellin, Ezer Melzer
  • Publication number: 20140286448
    Abstract: An encoder can convert a stream of data into three or four synchronized 4-PSK signals, for 64-QAM and 256-QAM, respectively. Three or four mixers can combine the three or four synchronized PSK signals with a common local oscillator signal to form three or four respective amplifiable signals, which can all have the same amplitude. One amplifier receives a first of the amplifiable signals and powers one radiator. Two amplifiers both receive a second of amplifiable signals and power two respective radiators. Four amplifiers receive a third of the amplifiable signals and power four respective radiators. The amplifiers can all operate in near or full saturation. Each radiator radiates in one of a plurality of discrete, specified states. The radiated states from the radiators combine through far-field electromagnetic propagation and effectively sum at the receiver to mimic transmission from a single amplifier.
    Type: Application
    Filed: February 25, 2014
    Publication date: September 25, 2014
    Applicant: Raytheon BBN Technologies Corp.
    Inventor: Robert Gyorgy Egri
  • Patent number: 8824536
    Abstract: Systems, methods, and devices enable spectrum management by identifying, classifying, and cataloging signals of interest based on radio frequency measurements. In an embodiment, signals and the parameters of the signals may be identified and indications of available frequencies may be presented to a user. In another embodiment, the protocols of signals may also be identified. In a further embodiment, the modulation of signals, data types carried by the signals, and estimated signal origins may be identified.
    Type: Grant
    Filed: November 18, 2013
    Date of Patent: September 2, 2014
    Assignee: DGS Global Systems, Inc.
    Inventors: Gabriel R. Garcia, Daniel Carbajal
  • Patent number: 8811509
    Abstract: Forward error correction (FEC) m-bit symbol modulation. Any desired FEC, error correction code (ECC), and/or combination thereof generates coded bits for combination with either uncoded bits, separately generated coded bits, and/or combination thereof to generate a number of symbols that undergo mapping to a constellation whose respective constellation points have a mapping characterized by a maximum minimum intra-Euclidean distance between the respective constellation points thereby generating a sequence of discrete-valued modulation symbols. The sequence of discrete-valued modulation symbols may then undergo modulation of any of a number of different operations (e.g., digital to analog conversion [e.g., digital to analog converter (DAC)], scaling, frequency shifting, filtering, etc.) to generate a continuous time signal for transmission via a communication channel. Such a device operative to perform including such functionality, circuitry, capability, etc.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: August 19, 2014
    Assignee: Broadcom Corporation
    Inventors: Ba-Zhong Shen, Avi Kliger
  • Patent number: 8726318
    Abstract: A multimedia information receiving apparatus receives multimedia information which is transmitted by a broadcast system and receives multimedia information which is simultaneously transmitted by another transmission system such as IP communications, and generates one received information by selecting elements having a few errors from elements of demodulated broadcast system information and elements of demodulated other transmission system information and then arranging the selected elements.
    Type: Grant
    Filed: October 4, 2006
    Date of Patent: May 13, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yasuaki Takimoto, Masahiro Abukawa, Shinji Akatsu
  • Patent number: 8718212
    Abstract: Embodiments of the present invention provide a rate matching method and apparatus. The method includes: receiving bit data of a first, a second, and a third input subblock, inserting dummy data into bit data in each subblock to respectively form even-numbered rows and odd-numbered rows of a matrix to be buffered for each subblock; inputting bit data of the even-numbered rows in the even-numbered row buffer and bit data of the odd-numbered rows in the odd-numbered row buffer of each subblock to a second buffer, and forming a matrix by using the bit data of the even-numbered rows and the bit data of the odd-numbered rows; controlling the second buffer to send data at the specified address; selecting data sent by the second buffer; and deleting the dummy data from the selected data to obtain valid output data.
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: May 6, 2014
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Xin Ma
  • Patent number: 8693562
    Abstract: A process receives a composite signal transmitted via a nonlinear data transmission channel, with the composite signal having a first signal UL and a second signal LL. The process includes the following: demodulating and decoding the first signal UL by using a first demodulation and decoding chain in order to regenerate first information of the first signal UL; recoding and shaping to produce a continuous time waveform; applying a nonlinearity function based on a set of coefficients updated according to an adaptive correlation calculation process to the continuous time waveform; subtracting the result of the nonlinearity function from the composite signal in order to generate a result E; and demodulating and decoding the result E by using a second demodulation and decoding chain in order to regenerate second information of the second signal LL.
    Type: Grant
    Filed: May 13, 2004
    Date of Patent: April 8, 2014
    Assignee: STMicroelectronics S.A.
    Inventor: Jacques Meyer
  • Patent number: 8675794
    Abstract: A method includes receiving reference signals in a mobile communication terminal, which is designed to receive data-carrying signals that are transmitted from a base station using one of multiple predefined Modulation and Coding Schemes (MCSs). One or more pre-calculated mappings between Signal-to-Noise Ratio (SNR) and error rate for one or more of the MCSs are held in the communication terminal. The pre-calculated mappings are adjusted according to one or more transmission parameters of the data-carrying signals. Measures indicative of respective actual spectral efficiencies that are achievable by the MCSs are estimated based on the adjusted mappings using the received reference signals. A preferred MCS is selected based on the estimated measures, and feedback that is indicative of the preferred MCS is sent to the base station.
    Type: Grant
    Filed: October 12, 2010
    Date of Patent: March 18, 2014
    Assignee: Marvell International Ltd.
    Inventors: Yona Perets, Daniel Yellin, Ezer Melzer
  • Patent number: 8649445
    Abstract: In bus communications methods and apparatus, a first set of physical signals representing the information to be conveyed over the bus is provided, and mapped to a codeword of a sparse signaling code, wherein a codeword is representable as a vector of a plurality of components, some of which are quiescent components and some of which are non-quiescent components, wherein the number of quiescent components and non-quiescent components meet a sparseness requirement.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: February 11, 2014
    Assignee: École Polytechnique Fédérale de Lausanne (EPFL)
    Inventors: Harm Cronie, Amin Shokrollahi, Armin Tajalli
  • 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: 8619899
    Abstract: There is provided an information processing apparatus, including a signal receiver that receives a signal encoded in such a way that a signal containing a first bit value and a second bit value, wherein the first bit value is represented by first amplitude values, the second value is represented by a second amplitude value, and polarity of the encoded signal amplitude value is reversed in each period, a conversion processor performs conversion to add a delayed signal that is delayed by delaying a signal received by the signal receiver by one period of the received signal, an inversion processor that performs inverse processing of the conversion on the signal output from the conversion processor, and an input data decoder that decodes an input data by determining the first and second values based on the amplitude value of the signal output from the inversion processor.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: December 31, 2013
    Assignee: Sony Corporation
    Inventors: Takehiro Sugita, Kunio Fukuda
  • Patent number: 8619895
    Abstract: Disclosed are a method and an apparatus for transmitting and receiving broadcast data in a digital broadcasting system. The method for transmitting and receiving broadcast data in a digital broadcasting system includes receiving the main data encoded with symbols having a plurality of levels; deciding whether levels of main data symbols encoded with symbols having the plurality of levels belong to a first group; and mapping the main data symbols to extended levels by using modulation values of the additional data if it is decided that the levels of the main data symbols belong to the first group.
    Type: Grant
    Filed: August 17, 2011
    Date of Patent: December 31, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jae-Hyun Seo, Sung-Ik Park, Ho-Min Eum, Hyoung-Soo Lim, Heung-Mook Kim, Soo-In Lee
  • Patent number: 8615033
    Abstract: A method for controlling a transmission rate of at least one transceiver, the transceiver including a transmitter and a receiver, includes: determining a signal quality characteristic corresponding to a signal received at the receiver by measuring a difference between one or more reference constellation points and one or more received constellation points, and modifying a transmission rate of the transmitter over a wireless communication channel as a function of the signal quality characteristic.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: December 24, 2013
    Assignee: Agere Systems LLC
    Inventors: Jan Boer, Bas Driesen, Ra'anan Gil, Kai Roland Kriedte
  • Patent number: 8594219
    Abstract: Systems and methodologies are described that facilitate applying cyclic delay diversity (CDD) and precoding to wireless transmissions. In particular, data vectors to be transmitted to a number of receive antennas of a receiver can be transformed to a virtual antenna domain. CDD can be applied to this domain followed by precoding to allow the benefits of precoding to remain though CDD is applied. In this regard, the resulting signals can be transmitted without pouring transmission energy into null spaces unreachable by receiving devices.
    Type: Grant
    Filed: April 24, 2008
    Date of Patent: November 26, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Byoung-Hoon Kim, Taesang Yoo, Xiaoxia Zhang
  • Patent number: 8559552
    Abstract: A method (300) for performing dual carrier modulation (DCM) precoding. The method comprises generating data sub-blocks (S320), independently interleaving the sub-blocks (S330), generating bit vectors by grouping bits of the interleaved sub-blocks (S350), mapping the bit vectors into data symbols (S360), and precoding the data symbols using a precoding matrix to generate precoded symbols (S370).
    Type: Grant
    Filed: April 14, 2009
    Date of Patent: October 15, 2013
    Assignee: Koninklijke Philips N.V.
    Inventors: Dong Wang, Dagnachew Birru
  • Patent number: 8553653
    Abstract: An arrangement and method for channel mapping in a UTRA TDD HSDPA wireless communication system by applying interleaving functions in first (530) and second (540) interleaving means to a bit sequence to produce symbols for mapping to physical channels, the first and second interleaving means being arranged to map symbols from respectively systematic and parity bits in a predetermined scheme, e.g., mapping symbols in a forward direction when a channel has an even index number, and in a reverse direction when a channel has an odd index number. The symbols may comprise bit-pairs, each of a systematic bit and parity bit. Systematic bits are preferably mapped to high reliability bit positions in TDD HSDPA, achieving a performance gain of between 0.2 dB and 0.5 dB. The forwards/reverse mapping allows a degree of interleaving that improves system performance in fading channels or channels disturbed by short time period noise or interference.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: October 8, 2013
    Assignee: Sony Corporation
    Inventor: Martin Beale
  • Patent number: 8552900
    Abstract: A successive approximation register switched capacitor analog to digital converter utilizes a high frequency clock for controlling comparator reset switches and a clock distribution block to operate at lower sample rates. The successive approximation cycles are clocked with the high frequency clock so that the reset switches stay within the leakage limit irrespective of the sample rate but the end of conversion signal is delayed to mimic the slower sample rate.
    Type: Grant
    Filed: April 20, 2012
    Date of Patent: October 8, 2013
    Assignee: Texas Instruments Incorporated
    Inventors: Haydar Bilhan, Maher Mahmoud Sarraj
  • Patent number: 8548105
    Abstract: Techniques for performing joint time-frequency automatic gain control (AGC) by a receiver are described. In an aspect, the receiver may transform time-domain samples with a fast Fourier transform (FFT) to obtain frequency-domain symbols and may detect for saturation of the frequency-domain symbols. The receiver may adjust a gain based on whether saturation is detected and may apply the gain prior to the FFT. In one design, the receiver may use a nominal value for a setpoint if saturation is not detected and may reduce the setpoint if saturation is detected. The receiver may adjust the gain based on the setpoint, which may determine the average power of the time-domain samples. In another design, the receiver may determine the gain based on a gain offset and may vary the gain offset based on whether saturation is detected. For both designs, the receiver may apply the gain on digital samples and/or an analog signal prior to the FFT.
    Type: Grant
    Filed: July 27, 2009
    Date of Patent: October 1, 2013
    Assignee: QUALCOMM Incorported
    Inventor: Roberto Rimini
  • Patent number: 8520748
    Abstract: In a cellular system using an OFDM scheme, a transmitter multiplies subcarriers for channel estimation by codes and transmits them, the codes being such that a phase difference ? of the code multiplied with consecutive subcarriers for channel estimation is constant, and a code of every M consecutive subcarriers (M being 2 or an integer greater than 2) is mutually orthogonal with a code multiplied with same subcarriers of another transmitter.
    Type: Grant
    Filed: October 3, 2006
    Date of Patent: August 27, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yasuhiro Hamaguchi, Kimihiko Imamura, Shimpei To, Hideo Namba
  • Patent number: 8520768
    Abstract: A method of communicating signals between a transmitter and a receiver in a mobile communication system, and the transmitter and the receiver for the same are disclosed. According to one embodiment, a method of transmitting signals by a transmitter in a mobile communication system includes: mapping, by the transmitter, a sequence generated by using a Zadoff-Chu sequence having a root index to frequency domain indexes; and transmitting, by the transmitter, the mapped sequence. The root index is selected from a predetermined index set consisting of three indexes. The three indexes include a first index and a second index. A sum of the first index and the second index corresponds to a length of the Zadoff-Chu sequence.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: August 27, 2013
    Assignee: LG Electronics Inc.
    Inventors: Seung Hee Han, Min Seok Noh, Yeong Hyeon Kwon, Hyun Woo Lee, Dong Cheol Kim, Jin Sam Kwak
  • Patent number: 8498355
    Abstract: There are provided a transmission and reception device having a function for correcting a data error in a communication path. In the transmission device, a redundant bit addition unit adds a redundant bit to each data bit which has been divided by one bit by a division unit; and an interleaver performs interleave. The transmission device transmits a signal which has been subjected to FM modulation by an FM modulation unit. In the reception device, a symbol decision unit performs a symbol decision at a Nyquist point for a signal which has been FM-demodulated by an FM demodulation unit; a bit conversion unit performs bit conversion according to the result of symbol decision; and a frame recovery unit deletes the redundant bit added by the redundant bit addition unit of the transmission device, from the bit string de-interleaved by a de-interleaver. Thus, it is possible to surely perform an error correction with a simple configuration even when the communication state is not in a preferable environment.
    Type: Grant
    Filed: December 7, 2004
    Date of Patent: July 30, 2013
    Assignee: Kabushiki Kaisha Kenwood
    Inventor: Taichi Majima
  • Patent number: 8494071
    Abstract: There are provided a transmission and reception device having a function for correcting a data error in a communication path. In the transmission device, a redundant bit addition unit adds a redundant bit to each data bit which has been divided by one bit by a division unit; and an interleaver performs interleave. The transmission device transmits a signal which has been subjected to FM modulation by an FM modulation unit. In the reception device, a symbol decision unit performs a symbol decision at a Nyquist point for a signal which has been FM-demodulated by an FM demodulation unit; a bit conversion unit performs bit conversion according to the result of symbol decision; and a frame recovery unit deletes the redundant bit added by the redundant bit addition unit of the transmission device, from the bit string de-interleaved by a de-interleaver. Thus, it is possible to surely perform an error correction with a simple configuration even when the communication state is not in a preferable environment.
    Type: Grant
    Filed: April 7, 2009
    Date of Patent: July 23, 2013
    Assignee: Kabushiki Kaisha Kenwood
    Inventor: Taichi Majima
  • Patent number: 8488693
    Abstract: A method used in a wireless communication apparatus based on reference signals is provided. The method may include obtaining a plurality of pilot rules and obtaining radio channel information of a radio channel between the wireless communication apparatus and another wireless communication apparatus. The wireless communication apparatus may be in an area including at least one cell and using one or more data streams. Further, the method may include selecting applicable pilot rules from the plurality of pilot rules based on the radio channel information, creating at least one pilot structure to be used in the radio channel; and using the created at least one pilot structure to transmit data over the radio channel.
    Type: Grant
    Filed: March 18, 2009
    Date of Patent: July 16, 2013
    Assignee: Industrial Technology Research Institute
    Inventors: Chung-Lien Ho, Ren-Jr Chen, Yan-Xiu Zheng
  • Patent number: 8472535
    Abstract: Methods and apparatus taught herein estimate the amount by which to reduce a multi-carrier signal's maximum transmit power based on metrics specific to each carrier of the multi-carrier signal. These carrier-specific metrics may include a maximum-power reduction or cubic metric determined for that carrier as if it would be transmitted alone. In one embodiment, estimation of the required back-off is based on a weighted sum of the carrier-specific metrics, where the weights applied depend on a power ratio. Only a few relatively small look-up tables or simple computations are required in this case: one for obtaining the carrier-specific metrics based on configuration parameters of each carrier, and another for obtaining the weights based on the power ratio. Accordingly, methods and apparatus herein advantageously require less computational complexity and/or memory usage than that needed if estimating the required back-off based on similar metrics obtained for the multi-carrier signal as a whole.
    Type: Grant
    Filed: June 22, 2009
    Date of Patent: June 25, 2013
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Anders Wallen