Transmitter Patents (Class 375/146)
  • Patent number: 8817590
    Abstract: In general, according to an embodiment, a wireless transmitter includes a plurality of coding and modulation modules to apply corresponding coding and modulation algorithms to input information blocks. A discrete Fourier transform (DFT) precoder applies DFT processing to outputs of the coding and modulation modules, and an inverse fast Fourier transform (IFFT) module receives a DFT output of the DFT precoder, which is mapped to different subcarriers according to the resource allocation indicated by the base station, and applies IFFT processing to the DFT output. An output processing stage produces output signals based on the output of the IFFT module to transmit wirelessly to a wireless receiver. In a different implementation, the outputs of the coding and modulation modules can be provided to an IFFT module to produce IFFT-processed output information.
    Type: Grant
    Filed: November 4, 2009
    Date of Patent: August 26, 2014
    Assignee: Apple Inc.
    Inventors: Lai-King Tee, Yi Song, Neng Wang, Chuandong Li
  • Patent number: 8817935
    Abstract: Embodiment for forming an aggregate signal from a plurality of starting signals, comprising: acquiring said starting signals through respective sensors of a homogeneous sensors group; converting acquired signals in respective digital signals having data represented with a predetermined bits number; processing the digital signals to form aggregate signal. The processing step comprises the operations of: modifying digital signals changing the data format of each such digital signals from a first format to a second format, each data in the second format having been obtained from a respective data in the first format through an operation of permuting the bits position according to a permutation scheme associated with said data and to the specific digital signal comprising that data; forming aggregate signal obtaining said aggregate signal data by means of a bitwise logic operator acting upon said modified digital signal respective data.
    Type: Grant
    Filed: July 27, 2010
    Date of Patent: August 26, 2014
    Assignee: STMicroelectronics S.r.l.
    Inventors: Giuseppe Visalli, Francesco Pappalardo
  • Patent number: 8817841
    Abstract: An apparatus for generating a spread-spectrum signal based on an input signal whose frequency may vary substantially. The apparatus is particularly suited for controlling the frequency of the modulation in response to wide variations of the frequency of the input signal. This prevents the modulation frequency from deviating into an undesired frequency range which could cause adverse operational effects. The apparatus includes a detector adapted to generate a first signal related to the frequency of the input signal, a controller adapted to generate a second signal for controlling a frequency of a modulation signal based on the first signal, a modulation signal generator adapted to generate the modulation signal based on the second signal, and a spread-spectrum signal generator adapted to generate the spread-spectrum signal based on the modulation signal.
    Type: Grant
    Filed: November 3, 2009
    Date of Patent: August 26, 2014
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Arda Kamil Bafra, Levent Yakay, Mustafa Ertugrul Oner
  • Patent number: 8811527
    Abstract: A transmitter with modulation comprising a phase changing stage having a first switch and a second switch coupled t the first switch, a first transistor and a second transistor individually coupled to the each switch. The transmitter is configured to receive a phase changing signal having a first state and a second state. The first switch is configured t operate in an opposing manner to the second switch such that only the first transistor is configured to be turned on i the first state and only the second transistor is configured to be turned on in the second state upon receipt of the phase changing signal by the switches so as to achieve a change in an output phase of the transmitter when the phase changing signal switches from the first state to the second state.
    Type: Grant
    Filed: October 30, 2009
    Date of Patent: August 19, 2014
    Assignee: Agency for Science, Technology and Research
    Inventors: Shengxi Diao, Yuanjin Zheng
  • Patent number: 8804864
    Abstract: Processing data presented in the form of a vector representation involves representing direction of the vector with incremental accuracy by using a set of vector codebooks of decreasing dimensions per accuracy increment.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: August 12, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Filippo Tosato
  • Patent number: 8804790
    Abstract: A method for communicating comprises generating at least one generalized Golay code from a concatenation of constituent Golay codes, and spreading at least a portion of a data stream with the at least one generalized Golay code. Generalized Golay codes comprise pseudo-complementary sequences having code lengths that differ from Golay complementary sequences and are characterized by low autocorrelation sidelobes relative to the autocorrelation peak.
    Type: Grant
    Filed: April 26, 2009
    Date of Patent: August 12, 2014
    Assignee: Adeptence, LLC
    Inventor: Ismail Lakkis
  • Patent number: 8798125
    Abstract: The present invention includes a method of determining a phase estimate for an input signal having pilot symbols. The method includes receiving a plurality of pilot symbols, and then multiplying two or more pilot symbol slots by corresponding correlator coefficients to correct a phase estimate of the input signal.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: August 5, 2014
    Assignee: Broadcom Corporation
    Inventors: Tommy Yu, Amy Gayle Hundhausen
  • Patent number: 8798115
    Abstract: A code generating apparatus, demodulation reference signal generating apparatus, and methods thereof. The demodulation reference signal generator includes generating a non-correlation sequence for RS of a first resource block; spreading spectrums of elements in the non-correlation sequence for RS to be mapped to a first frequency resource of the first resource block, by using a first group of codes; second spreading spectrums of elements in the non-correlation sequence for RS to be mapped to a second frequency resource of the first resource block, by using a second group of Codes; the first and second frequency resources are adjacent frequency resources in frequency resource elements used for RS transmission in the first resource block, and the first and second groups of Codes are mirrors in column to each other; and mapping the spectrum-spread elements to the first and second frequency resources, respectively.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: August 5, 2014
    Assignee: Fujitsu Limited
    Inventors: Yi Wang, Yuantao Zhang, Hua Zhou, Jianming Wu
  • Patent number: 8792542
    Abstract: Apparatus for processing broadband impulses signals of low repetition rate includes a tuner for receiving broadband impulsive signals of low repetition rate and providing an output signal characteristic of the amplitude and spectral content of the received input signal. Resolution bandwidth filters coupled to the tuner output each have a different bandwidth that determines the measurement resolution and influences the sensitivity and transient response to low repetition rate impulsive signals. At least one radio frequency switch selects a resolution bandwidth filter for coupling to and associated one of at least a peak detector, an average detector and an envelope generator. A gate generator coupled to the peak detector, the average detector and the envelope generator furnishes a gating signal to each to provide a peak signal, an average signal and an envelope signal respectively during a selected gating interval. A microprocessor is coupled to the peak detector and the average detector.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: July 29, 2014
    Assignee: Doble Engineering Company
    Inventors: Scott McMeekin, Brian G. Stewart, Stephen Conner, Carlos Gamio, Alan Nesbitt
  • Patent number: 8792535
    Abstract: A semiconductor device includes: a clock and data recovery unit to which a receive signal is inputted and which extracts, based on an operation clock signal, a clock signal and a data signal from the receive signal; a frequency error adjusting unit which generates a frequency error signal indicating a frequency error between the clock signal extracted from the receive signal and the operation clock signal; a frequency error signal storage unit which stores the frequency error signal; an operation clock generation unit which controls, based on the frequency error signal, a frequency of the operation clock signal; and an SSCG unit which, based on the value of the frequency error signal stored in the frequency error signal storage unit, varies the operation clock signal generated by the operation clock generation unit by spreading the spectrum of the operation clock signal.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: July 29, 2014
    Assignee: Renesas Electronics Corporation
    Inventor: Masao Nakadaira
  • Patent number: 8792928
    Abstract: A radio base station includes: a table storage unit storing a table in which an E-TFCI indicating a transport format combination indicator of the physical data channel to be transmitted by a mobile station is associated with ?ed that is used to determine a SG and is an offset value of transmission power of the physical data channel to be transmitted by the mobile station; a parameter selector selecting the ?ed associated with the E-TFCI from the table; and a communication controller determining a SG based on the ?ed thus selected and an E-TFCI associated with the selected ?ed, and controlling transmission power of the mobile station by using the SG thus determined.
    Type: Grant
    Filed: January 14, 2009
    Date of Patent: July 29, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Tatsuro Yajima, Hidehiko Oyane, Akihito Hanaki, Daisuke Tanigawa
  • Patent number: 8787421
    Abstract: A method for receiving Acknowledgement/Negative acknowledgement (ACK/NACK) information in a mobile communication system includes receiving a first signal including first spread ACK/NACK information and second spread ACK/NACK information from a first antenna set of a transmitting end in an orthogonal frequency division multiplexing (OFDM) symbol; receiving a second signal including third spread ACK/NACK information and fourth spread ACK/NACK information from a second antenna set of the transmitting end in an OFDM symbol; and de-spreading at least the first and third spread ACK/NACK information or the second and fourth spread ACK/NACK information for identifying the ACK/NACK information.
    Type: Grant
    Filed: September 18, 2013
    Date of Patent: July 22, 2014
    Assignee: LG Electronics Inc.
    Inventors: Jung Hoon Lee, Ki Jun Kim, Dong Wook Roh, Daewon Lee, Joon Kui Ahn
  • Patent number: 8787424
    Abstract: A spread spectrum transmission circuit includes a phase locked loop composed of a filter. The phase locked loop generates a series of incremental control signals and decreasing control signals based on the frequency difference and phase difference between a reference clock signal and a feedback signal. The circuit further has a frequency locked loop an amplitude locked loop, a digital-analog converter, an injection current source, an extraction current source, a multiplexer is connected to the locked phase loop and a rail-to-rail digital signal generator having an input connected to the multiplexer and an output connected to inputs of the locked frequency loop and the locked amplitude loop.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: July 22, 2014
    Assignee: National Taiwan University
    Inventors: Tai-Cheng Lee, Chien-Heng Wong
  • Patent number: 8774312
    Abstract: The invention relates to a method for the scalable improvement of the quality of an encoding method according to IT-U Recommendation G.722, including the following steps: —a digital error signal (E) derived from an input signal to be encoded and a prognosis signal is compared in sections to a number of M*LN different reference signals in an iterative process having a number of repeated steps depending on the scope of the expansion, and the reference signal having a minimum error signal of a prescribed error criteria is derived therefrom, —the reference signals are each made up of equidistant Dirac impulses ?(n) according to (I), wherein off=[0 . . . M?1], indicates the distance of the first impulse from a zero time point, ??{?, ?, . . . , ?} indicates the amplitude value, M the distance between the individual pulses, N the number of pulses, and L the number of different levels, —the information about the reference signal having the minimum error signal is transmitted.
    Type: Grant
    Filed: December 10, 2009
    Date of Patent: July 8, 2014
    Assignee: Siemens Enterprise Communications GmbH & Co. KG
    Inventors: Stefan Schandl, Panji Setiawan
  • Patent number: 8774251
    Abstract: A method, implemented in a communication device configured to generate PHY data units corresponding to a first modulation mode and PHY data units corresponding to a second modulation mode, includes generating a PHY data unit having a CEF, including generating a sequence u of the CEF and generating a sequence v of the CEF. Sequence u includes complementary Golay sequences a and b, and is spread with a first cover code. Sequence v includes the complementary Golay sequences a and b, and is spread with a second cover code. The PHY data unit is generated such that sequence u precedes sequence v when the PHY data unit corresponds to the first modulation mode, and sequence v precedes sequence u when the PHY data unit corresponds to the second modulation mode. The method also includes causing the PHY data unit to be transmitted via a communication channel.
    Type: Grant
    Filed: April 23, 2012
    Date of Patent: July 8, 2014
    Assignee: Marvell World Trade Ltd.
    Inventors: Hongyuan Zhang, Songping Wu, Hui-Ling Lou, Rohit U. Nabar
  • Publication number: 20140185654
    Abstract: An orthogonal frequency division multiplexing (OFDM)-code division multiple access (CDMA) system is disclosed. The system includes a transmitter and a receiver. At the transmitter, a spreading and subcarrier mapping unit spreads an input data symbol with a complex quadratic sequence code to generate a plurality of chips and maps each chip to one of a plurality of subcarriers. An inverse discrete Fourier transform is performed on the chips mapped to the subcarriers and a cyclic prefix (CP) is inserted to an OFDM frame. A parallel-to-serial converter converts the time-domain data into a serial data stream for transmission. At the receiver, a serial-to-parallel converter converts received data into multiple received data streams and the CP is removed from the received data. A discrete Fourier transform is performed on the received data streams and equalization is performed. A despreader despreads an output of the equalizer to recover the transmitted data.
    Type: Application
    Filed: March 5, 2014
    Publication date: July 3, 2014
    Inventors: Guodong ZHANG, Yingming TSAI
  • Patent number: 8767797
    Abstract: A method and apparatus provide hybrid automatic repeat request (HARQ) feedback corresponding to the status of multiple downlink carriers, with or without MIMO being configured. Here, for at least some configurations, with respect to the selection of HARQ feedback symbols, the downlink carriers are grouped into groups of one or two carriers such that HARQ feedback symbol code books that were previously implemented in conventional HSDPA or DC-HSDPA systems may be utilized. That is, after encoding a data stream, HARQ feedback symbols selected from a plurality of code books configured for groups of one or two of the downlink carriers are utilized to modulate an uplink channel. The modulation or channelization may be accomplished with dual channelization codes or a single channelization code with a reduced spreading factor to insert two symbols into a single time slot.
    Type: Grant
    Filed: October 4, 2010
    Date of Patent: July 1, 2014
    Assignee: QUALCOMM Incorporated
    Inventor: Sharad Deepak Sambhwani
  • Patent number: 8767798
    Abstract: There are provided a phased spreading scheme-based transmission apparatus and a method of operating the same. The phased spreading scheme-based transmission apparatus includes a spreading unit performing a first spreading operation of defining a first spreading code and spreading an input signal by using the defined first spreading code in response to a control signal defining a spreading coefficient, and a second spreading operation of selecting a second spreading code based on the control signal defining the spreading coefficient and spreading an input signal by using the selected second spreading code, the first and second spreading codes having different spreading coefficients.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: July 1, 2014
    Assignee: Industry-Academic Cooperation Foundation, Chosun University
    Inventors: Youn-Tae Kim, Kun-Ho Park, Jang-Myoung Kim, Min-Joo Jeong, Chang-Hee Hyoung, Jung-Hwan Hwang, Sung-Weon Kang
  • Patent number: 8768570
    Abstract: A wheel suspension system for a three-wheeled motorcycle or “trike” includes parallel wheels mounted on vertically pivoting suspension arms governed by hydraulic pistons. The pistons have upper liquid reservoirs that are interconnected through a valve system, which interconnects the upper reservoirs when the trike is in motion, allowing opposing vertical wheel movements when banking through turns, and prevents liquid exchange when the trike is stopped, thereby holding the motorcycle upright, Embodiments include a manual and/or automatic valve control. A threshold switching speed for an automatic controller can be factory set and/or user adjustable. The pistons can include directly interconnected lower fluid reservoirs. A shock-absorbing reservoir can allow transient vertical movement of both wheels to absorb shocks. A cover system can emulate the appearance of saddle bags and can appear to be covering only a single wheel.
    Type: Grant
    Filed: August 7, 2013
    Date of Patent: July 1, 2014
    Inventor: Steven P Young
  • Patent number: 8767886
    Abstract: A channel estimation treatment method and device for obtaining binary data conveyed in a signal. The method includes: obtaining a current vector of channel estimates, each element of the current vector corresponding to an estimate of a subchannel; detecting, inside the current vector, at least one pilot symbol; splitting the current vector in at least two subvectors, at least one first subvector including channel estimates related to data symbols and/or pilots symbols and at least one second subvector including channel estimates related to null symbols; decoding the at least one first subvector, delivering at least one first treated subvector; modifying the at least one second subvector by assuming presence of pilot symbols in the at least one second subvector, delivering at least one second treated subvector; and calculating a new vector of channel estimates with the at least one first treated subvector and the at least one second treated subvector.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: July 1, 2014
    Assignee: Sequans Communications
    Inventors: Serdar Sezginer, Yang Liu
  • Publication number: 20140177681
    Abstract: An all-digital spread spectrum clock generating circuit with EMI reduction effect and a method for controlling the same utilize a digital spread-spectrum clock controlling unit to control a digital controlled oscillator, so that it can directly modulates an output clock frequency. Accordingly, the spectrum of the output clock frequency is spread, and the EMI effect due to the output clock signal is reduced. A spread-spectrum clock controller receives a reference clock counting signal and a dividing clock counting signal generated by a frequency detecting unit. After detecting and judging, the spread-spectrum clock controlling unit modulates and maintains a central frequency of the spread-spectrum clock periodically according to the two counting signals, thereby keeping a stability of the central frequency of the spread-spectrum clock signal and decreasing the complexity of the circuit design.
    Type: Application
    Filed: April 16, 2013
    Publication date: June 26, 2014
    Applicant: NATIONAL CHUNG CHENG UNIVERSITY
    Inventors: CHING-CHE CHUNG, WEI-DA HO
  • Patent number: 8761231
    Abstract: Provided are a frequency modulation/demodulation apparatus using a frequency selective baseband and a transmitting/receiving apparatus using the same. In a frequency selective baseband transmission technique or an FS-CDMA technique, a transmission rate is controlled according to communication channel environment, spread code groups are repeatedly selected in a receiving side so as to obtain a frequency diversity gain. Accordingly, it is possible to reduce interference between users. In addition, even in a case where strong interference induced from electronic exists, it is possible to implement low-power, stable human-body communication and to ensure a communication quality.
    Type: Grant
    Filed: April 29, 2008
    Date of Patent: June 24, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Hyung Il Park, In Gi Lim, Tae Wook Kang, Sung Weon Kang, Kyung Soo Kim, Jung Bum Kim, Chang Hee Hyoung, Jung Hwan Hwang, Jin Kyung Kim, Sung Eun Kim, Duck Gun Park, Ki Hyuk Park, Jae Hoon Shim
  • Patent number: 8761303
    Abstract: Techniques for providing multipath protection of a portion of a frame classified as having a first importance level (e.g., critical) are provided. Different cyclic prefix lengths may be used, depending on whether a frame contains information deemed critical.
    Type: Grant
    Filed: August 18, 2009
    Date of Patent: June 24, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Miguel Griot, Pranav Dayal
  • Patent number: 8761299
    Abstract: A preamble generating apparatus used for synchronization of a reception apparatus in an orthogonal frequency division multiplexing system and generating a preamble to be added to a beginning of data at a time of communication, receives preamble length identifying information and position specifying information, and generates a plurality of elements constituting a preamble according to a predetermined sequence based on those information. The preamble generating apparatus creates a preamble model, and generates a plurality of preambles by setting the generated elements at positions of elements in element deciding information included in the preamble model, the positions indicating elements in the preamble model which are to be used in data communication.
    Type: Grant
    Filed: July 27, 2011
    Date of Patent: June 24, 2014
    Assignee: Icom Incorporated
    Inventor: Nobuyoshi Nishikawa
  • Patent number: 8761230
    Abstract: A communication method comprises generating a Golay code having a zero-DC level when differentially encoded and continuously rotated. A preamble of a data stream is spread with the Golay code, and the data stream is modulated with continuous phase modulation (CPM), such as constant envelope 2-CPM, before being transmitted. A method for acquiring a received signal having a spread sync field modulated with 2-CPM comprises performing chip-level differential detection of the received signal, correlating the received signal with a Golay sequence; and accumulating the correlator outputs.
    Type: Grant
    Filed: June 8, 2009
    Date of Patent: June 24, 2014
    Assignee: Adeptence, LLC
    Inventor: Ismail Lakkis
  • Publication number: 20140169408
    Abstract: A method for transmitting data includes mapping a first coded information bit stream intended for a first transmit antenna onto at least one first spreading sequence of a plurality of first spreading sequences to generate a first data stream, mapping a second coded information bit stream intended for a second transmit antenna onto at least one second spreading sequence of a plurality of second spreading sequences to generate a second data stream. The method also includes transmitting the first data stream and the second data stream on respective transmit antennas.
    Type: Application
    Filed: September 25, 2013
    Publication date: June 19, 2014
    Applicant: FUTUREWEI TECHNOLOGIES, INC.
    Inventors: Alireza Bayesteh, Hosein Nikopour, Jianglei Ma
  • Publication number: 20140169407
    Abstract: The present invention teaches method and apparatus to transform a featureless, unpredictable, and non-repeatable chaos waveform into digital chaos waveforms that maintain featureless characteristics to serve as a for wireless communications protocol, whereby unintended observers cannot detect or disrupt yet imprint a small measure of predictability and repeatability to aid intend observers in recovering embedded information. This invention discloses wireless communication systems with multiple signal aggregation at the transmitter and multiple detection at the receiver that uses embedding digital signals and digital information within multiple digital chaos waveforms.
    Type: Application
    Filed: March 26, 2012
    Publication date: June 19, 2014
    Inventor: John David Terry
  • Publication number: 20140169409
    Abstract: System and method embodiments are provided for open-loop spatial multiplexing for radio access virtualization. In an embodiment, a system includes a plurality of antenna ports and a processor coupled to the plurality of antenna ports and configured to spread a spreading sequence over at least a portion of the plurality of antenna ports in a spatial domain, wherein the processor is configured to cause the antenna ports to transmit multiple spreading sequences simultaneously by sequence superposition.
    Type: Application
    Filed: May 22, 2013
    Publication date: June 19, 2014
    Applicant: FutureWei Technologies, Inc.
    Inventors: Jianglei Ma, Hosein Nikopour, Alireza Bayesteh, Ming Jia, Peiying Zhu
  • Patent number: 8755424
    Abstract: A radio transmitter for use with a coherent radio receiver comprising; transmission circuitry configured to transmit radio pulses in accordance with an underlying pulse transmission rate; receive circuitry configured to receive a message comprising an indication of a target transmit power of the radio transmitter; and power control circuitry configured to, in response to receiving said message, inhibit the transmission of selected radio pulses of the underlying pulse transmission rate so as to cause the transmission circuitry to transmit radio pulses at an effective pulse transmission rate having an average power in accordance with the target transmit power indication in the received message.
    Type: Grant
    Filed: July 2, 2010
    Date of Patent: June 17, 2014
    Assignee: Ubisense Limited
    Inventor: Andrew Martin Robert Ward
  • Patent number: 8749351
    Abstract: The present invention introduces a location determining system. The location determining system includes a reader array and a location determining engine server. The reader array includes three readers, where each reader includes a plurality of reader groups that receives a tag information signal transmitted from the tag, generates a PN code generated from inside, correlation and standard deviation of the correlation, and bypasses the tag information signal, in a case a ratio of correlation and standard deviation of the correlation is greater than a predetermined critical value. The location determining engine server determines a final location value relative to the tag, using the tag information signal having a time difference of tag information signals received from the three readers forming each reader group among the tag information signals bypassed by the plurality of reader groups smaller than a predetermined marginal time difference.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: June 10, 2014
    Assignee: LSIS Co., Ltd.
    Inventor: Jae Wook Kim
  • Patent number: 8743982
    Abstract: A system includes at least a transmitter having a serial-to-parallel converter, an iFFT block and a frequency de-spreader device that applies each signal that results from multiplying a data sample by one of the predetermined frequency coefficients of the prototype filter of a synthesis filter bank to one of the inputs of the iFFT block presenting a size that is strictly greater than the number of subchannels. Also described is a system including at least one receiver including a serial-to-parallel converter, a FFT block presenting a size that is strictly greater than the number of subchannels of the system, and a frequency de-spreader device that multiplies the signal from each output of the FFT block by one of predetermined frequency coefficients of the prototype filter of an analysis filter bank and sums the results of these multiplications to deliver at least a portion of the output signal from the receiver.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: June 3, 2014
    Assignee: Commissariat a l'Energie Atomique et aux Energies Alternatives
    Inventor: Maurice Bellanger
  • Patent number: 8743862
    Abstract: In a wireless 802.15.4 communication system (300), a high-speed data frame structure (340) is provided which uses the 802.15.4 SHR structure that is spread modulated to obtain the synchronization benefits of the 802.15.4 protocol, but which uses a modified data frame structure for the payload portion without using spreading to thereby improve its transmission efficiency. The transmission efficiency can be further increased by increasing the size of the data payload (and correspondingly, the frame length size).
    Type: Grant
    Filed: July 1, 2011
    Date of Patent: June 3, 2014
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Clinton C Powell, Kuor-Hsin Chang, Bing Xu
  • Patent number: 8743927
    Abstract: A data communication method is provided, comprising: processing high-speed digital data for communication to produce processed data; generating short impulse wavelets; constructing a digitally modulated ultra wideband signal from the short impulse wavelets in response to bits of the processed data, wherein the digitally modulated ultra wideband signal comprises a series of the short impulse wavelets, and the value of each bit of the processed data is digitally modulated onto the shape of at least one of the short impulse wavelets of the series, to produce a series of digitally shape modulated impulse wavelets; and transmitting the digitally modulated ultra wideband signal, including the series of digitally shape modulated impulse wavelets, via an antenna.
    Type: Grant
    Filed: August 28, 2012
    Date of Patent: June 3, 2014
    Assignee: Freescale Semiconductor, Inc.
    Inventor: John W. McCorkle
  • 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: 8737450
    Abstract: High speed serial link techniques are provided. A system applying the high speed serial link technique comprises a relay unit and an amplifier. The relay unit receives a first pair of differential signals provided by a high speed transmitter of a first device, and provides the amplifier with at least one signal that is generated based on the first pair of differential signals. The amplifier amplifies and converts the signal provided by the relay unit to a second pair of differential signals to be received by a high speed receiver of a second device.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: May 27, 2014
    Assignee: Via Technologies, Inc.
    Inventor: Shun-Cheng Yang
  • Patent number: 8737515
    Abstract: A roulette table, including an electronic system having at least one electronic circuit, a number of M antennas, a Code Division Multiple Access (CDMA) transmitter for sending a number of M orthogonal code sequences via the antennas, and a contactless communication interface for receiving the position from an electronic memory of the electronic circuit, in which the antennas are arranged below stake fields of the roulette table, and having chips, in which each chip is equipped with an electronic circuit.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: May 27, 2014
    Inventor: Christoph Ruland
  • Publication number: 20140140375
    Abstract: The method for compressive sensing (CS) and reconstruction of ultra-wideband (UWB) channels includes building four practically-based dictionaries related to the antenna angles of transmission and angles of arrival that enhance the sparsity of UWB signals. The dictionaries account for the practical effects of the channel, such as pulse dispersion and the unavoidable effects of the antenna. Utilizing the practically-based dictionaries CS is able to reconstruct the UWB signals more efficiently with reasonable complexity. In addition to waveform reconstruction, the dictionaries are used for channel estimation. The CS method can be used with either a single-shot full profile correlator or a Rake receiver. The Rake receiver employs CS in adjusting its parameters to take advantage of the energy available in the strongest propagation paths.
    Type: Application
    Filed: November 19, 2012
    Publication date: May 22, 2014
    Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
    Inventors: ALI HUSSEIN MUQAIBEL, MOHAMMAD TAMIM ALKHODARY
  • Patent number: 8731575
    Abstract: A system and method are disclosed that allow changes of a modulation and coding scheme (MCS) without overhead signaling. A priori, a network device and a user device know the manner in which the MCS will be changed. In one embodiment, the network device indicates the MCS to be used to decode a second portion of a message in a first portion of the message. In another embodiment, the user device blind detects the MCS used over a sub-set of MCSs.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: May 20, 2014
    Assignee: BlackBerry Limited
    Inventors: Zhijun Cai, Sean Bartholomew Simmons, James Earl Womack, Takashi Suzuki, Yi Yu
  • Patent number: 8731021
    Abstract: A digital circuit configured to spread a clock train spectrum includes a clock configured to generate the clock train, and a variable divider configured to divide the frequency of the clock train by a temporally-varying-divider value to modulate the clock train and generate a dithered clock train. The circuit further includes a first accumulator configured to accumulate the dithered clock train to generate a frequency modulation waveform, and a second accumulator configured accumulate the frequency modulated waveform to generate a phase modulation signal. The circuit further includes a phase-value calculator configured to calculate the temporally-varying divider value based on the phase modulation signal; and a closed-loop control circuit configured to track and filter the modulation of the dithered clock train to generate a second clock train that is the spread spectrum of the first mentioned clock train.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: May 20, 2014
    Assignee: Marvell World Trade Ltd.
    Inventor: Jody Greenberg
  • Patent number: 8723700
    Abstract: The present invention discloses a method and a device for pulse encoding, and a method and a device for pulse decoding. The method for pulse encoding includes: calculating an index value of an input pulse; selecting an adjustment threshold value according to the number of pulses, and comparing the index value of the pulse with the adjustment threshold value; if the index value is smaller than the adjustment threshold value, adopting the first number of encoding bits to encode the index value, if the index value is not smaller than the adjustment threshold value, adopting the second number of encoding bits to encode the index value plus an offset value, where the first number is smaller than the second number, the first number and the second number are both positive integers, and the offset value is greater than or equal to the adjustment threshold value.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: May 13, 2014
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Fuwei Ma, Dejun Zhang, Minjie Xie, Qing Zhang
  • Patent number: 8723721
    Abstract: A multistatic radar surveillance system includes transmitter elements and receiver elements arranged according to a zone to be monitored, and a command and control unit that configures the elements and collects information relating to objects detected by the receiver elements. Each transmitter element transmits a signal, the bandwidth of which is substantially equal to the totality of a frequency band B allocated to the system. Each transmitter element transmits a common waveform to all of the transmitter elements, and the waveform is modulated by a binary signal specific to the element in question, this signal allowing each of the receiver elements receiving a signal to identify the transmitter element at the source of this signal. The coding applied to the waveform is defined so that the spread spectrum caused to the signal transmitted by the latter does not exceed the frequency band B allocated to the system.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: May 13, 2014
    Assignee: Thales
    Inventors: Michel Moruzzis, Daniel Muller, Jean-Marie Ferrier
  • Patent number: 8724676
    Abstract: A wireless device comprises a code-assignment module configured for assigning Golay codes to be used for spreading, a spreading module configured for spreading data with the Golay codes to produce a signal, wherein the Golay codes are randomly used to spread the data, and a transmitter configured for transmitting the signal. The wireless device may transmit a first beacon signal via a set of quasi-omni beam patterns, and a second beacon signal via a set directional beam patterns. The first beacon signal has a first transmission rate that is higher than the second beacon signal's the transmission rate. Extended Golay codes having zero periodic cross-correlation may be generated from a Golay code and a set of short sequences. A data block transmitted by the wireless device may comprise Golay codes and data portions, wherein every data portion is between two Golay codes and every Golay code is between two data portions.
    Type: Grant
    Filed: October 9, 2008
    Date of Patent: May 13, 2014
    Assignee: QUALCOMM Incorporated
    Inventor: Ismail Lakkis
  • Patent number: 8724674
    Abstract: A device may generate a clock signal using spread-spectrum clocking. The spread-spectrum clocking may modulate a frequency of the clock signal to produce a plurality of frequencies for the clock signal during a modulation cycle. The device may receive an instruction to disable the spread-spectrum clocking, and may disable the spread spectrum clocking at the end of the modulation cycle.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: May 13, 2014
    Assignees: ATI Technologies ULC, Advanced Micro Devices, Inc.
    Inventors: Michael R. Foxcroft, Shirley Pui Shan Lam, George A. W. Guthrie, Alexander Shternshain, Mihir Doctor, Krishna Sitaraman, Jeff Herman
  • Publication number: 20140119410
    Abstract: Systems and methods for communication using hybrid signals are disclosed. In one aspect an apparatus for communication includes a processing system configured to encode a first set of information in a plurality of symbols and to encode a second set of information according to a spacing among the symbols. The apparatus may further comprise a transmitter configured to transmit to a device the symbols with the spacing among the symbols. In another aspect, an apparatus for communication includes a processing system configured to decode a first set of information from a plurality of symbols encoded with the first set of information or a second set of information from a spacing among the symbols by determining the spacing among the symbols. The apparatus may further comprise a receiver configured to receive the symbols via a wireless communication.
    Type: Application
    Filed: September 30, 2013
    Publication date: May 1, 2014
    Applicant: QUALCOMM Incorporated
    Inventors: Bin Tian, Gwendolyn Denise Barriac, Sameer Vermani, Hemanth Sampath
  • Patent number: 8711771
    Abstract: Systems and methods for extending header fields are disclosed. The header field may be extended without changing the current size of the header. Reserve bits may be used to indicate the use of an extended header and the extended header may be store in a variety of locations within the frame, including the frame payload or pad bits.
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: April 29, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Soumya Das, Kaushik Chakroborty, Krishnan Rajamani, Ozgur Dural, Samir Salib Soliman
  • Patent number: 8705590
    Abstract: A demodulation reference signal generator includes a non-correlation sequence generator to generate a non-correlation sequence for RS of a first resource block; a first spectrum spreading unit to spread spectrums of elements in the non-correlation sequence for RS to be mapped to a first frequency resource of the first resource block, by using a first group of codes; a second spectrum spreading unit to spread spectrums of elements in the non-correlation sequence for RS to be mapped to a second frequency resource of the first resource block, using a second group of Codes; the first and second frequency resources are adjacent frequency resources used for RS transmission in the first resource block, and the first and second groups of Codes are mirrors in column to each other; and a mapping unit to map the spectrum-spread elements to the first and second frequency resources.
    Type: Grant
    Filed: July 9, 2012
    Date of Patent: April 22, 2014
    Assignee: Fujitsu Limited
    Inventors: Yi Wang, Yuantao Zhang, Hua Zhou, Jianming Wu
  • Patent number: 8705591
    Abstract: A signal processing system and method for a GNSS digital signal wherein a carrier-stripped GNSS signal, is sampled according to a variable rate, determined by the code NCO, and including a timing circuit arranged to generate a timestamp code determining the sampling time of at least one of the samples in the buffer memory. By taking code samples in this way it is possible to transfer the samples asynchronously to a separate processor for the search task to be performed, for example an asynchronous parallel correlator implemented in the same silicon in hardware, or a media processor such as a graphics accelerator implemented in the same device or a separate physical device.
    Type: Grant
    Filed: December 5, 2008
    Date of Patent: April 22, 2014
    Assignee: QUALCOMM Incorporated
    Inventor: Philip John Young
  • Patent number: 8699612
    Abstract: Techniques are described herein that receive communications transmitted according to different operation modes at a multi-mode, programmable receiver system. The multi-mode, programmable receiver system may receive communication signals from transmit antennas in “cells” (e.g., base station transceivers and/or the like) according to one or more operation modes, using receive antennas. The received signals may be converted and processed by various modules of the multi-mode, programmable receiver system to produce an output signal. The multi-mode, programmable receiver system includes modules that are programmable to be selectively enabled or disabled according to an operation mode in accordance with which the multi-mode, programmable receiver system operates.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: April 15, 2014
    Assignee: Broadcom Corporation
    Inventor: Fu-Hsuan Chiu
  • Patent number: 8699545
    Abstract: A method of embedding and transmitting a meta-data message in an original burst carrier signal for message reassembly comprising spreading a meta-carrier signal using a Direct Sequence Spread Spectrum (DSSS) spreading code having a Pseudo-Random Noise (PRN) spreading code sequence, the meta-carrier signal comprising one or more bits of meta-data information about the original burst carrier signal, lowering a power spectral density of the meta-carrier signal using the PRN spreading code such that interference with the original signal is reduced, combining the original burst carrier and the meta-carrier signals using a modulator such that a composite burst carrier signal results wherein the meta-carrier signal occupies at least a portion of a bandwidth of the original carrier, and transmitting the composite burst carrier using a transmitter over a telecommunications channel in which only one burst carrier signal is expected to be present within a predetermined frequency bandwidth at a point in time.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: April 15, 2014
    Assignee: Comtech EF Data Corp.
    Inventors: Michael Beeler, Frederick Morris, Cris Mamaril, Jeffery Harig, Richard Hollingsworth Cannon, Brian Banister
  • Patent number: 8693526
    Abstract: This invention teaches a way to multiplex and de-multiplex unipolar signals using spread spectrum methods. While bipolar spread spectrum signal multiplexing may be used in may applications, for example for systems using radio signals, when using unipolar signals there is a loss of orthogonally which makes the standard algorithms unworkable. This invention teaches a method to recover orthogonally and make spread spectrum multiplexing useful for unipolar signals. One example is in the measurement of optical absorbance along multiple paths simultaneously using light signals, as for functional near infrared spectroscopy (fNIRS).
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: April 8, 2014
    Inventor: Chester Roy Wildey