Phase Shift Keying Patents (Class 375/308)
  • Patent number: 10277263
    Abstract: A radio receiver, configured to use an impulse UWB, includes: a reception antenna which receives the impulse UWB, a reception unit which amplifies the received impulse UWB and detects an envelope of the impulse UWB, maximum-peak and minimum-peak detection units which detect a maximum value and minimum value of the envelope, respectively, a comparator which acquires signal data from the envelope with an initial threshold value, a baseband unit which measures an error rate of the signal data, an MPU which calculates a correction value based on the error rate, and an arithmetic unit which calculates a corrected threshold value based on the maximum, minimum and correction values. The arithmetic unit transmits the corrected threshold value to the comparator. The comparator acquires the signal data from the envelope based on the corrected threshold value transmitted from the arithmetic unit.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: April 30, 2019
    Assignees: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY, GIT JAPAN INCORPORATED
    Inventors: Huan-Bang Li, Ryu Miura, Hisashi Nishikawa, Atsushi Osada
  • Patent number: 10277359
    Abstract: A method and apparatus for receiving feedback information of a transmitter in a mobile communication system are provided. The method includes determining a parameter related to a first user signal; transmitting the first user signal based on the parameter related to the first user signal to a receiver; and receiving feedback information associated with the first user signal and an interference signal based on the first user signal.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: April 30, 2019
    Assignees: Samsung Electronics Co., Ltd, Dongguk University Industry-Academic Cooperation Foundation
    Inventors: Jongsoo Choi, Byoung Jo Choi, Seung Hoon Hwang, Eun Sun Hwang
  • Patent number: 10212680
    Abstract: Embodiments provide synchronization signal sending and receiving methods, apparatuses, and devices. The synchronization signal sending apparatus of the embodiments includes a synchronization signal generation module, configured to generate a synchronization signal according to one or more sequences, where a length or lengths of the one or more sequences are determined according to a length of the synchronization signal. The apparatus also includes a baseband signal obtaining module, configured to obtain a baseband signal according to the synchronization signal generated by the synchronization signal generation module. Additionally, the apparatus includes a first sending module, configured to send, after performing radio frequency conversion, out the baseband signal obtained by the baseband signal obtaining module.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: February 19, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Chao Li
  • Patent number: 10205612
    Abstract: The present invention describes a method and system for simultaneous transmission of data to coherent and non-coherent receivers. The method at the transmitter includes retrieving a base ternary sequence having a pre-defined length, obtaining one or more ternary sequences corresponding to data to be transmitted and transmitting the obtained one or more ternary sequences by the transmitter. The method steps at the receiver includes receiving one or more ternary sequences corresponding to the data transmitted, demodulating each of the received ternary sequences by correlating with all cyclic shifts of the base ternary sequence by the receiver if the receiver is a coherent receiver, demodulating each of the received ternary sequences by correlating with all cyclic shifts of the absolute of the base ternary sequence by the receiver if the receiver is a non-coherent receiver and detecting the transmitted data based on the cyclic shifts corresponding to maximum correlation values.
    Type: Grant
    Filed: February 5, 2018
    Date of Patent: February 12, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sujit Jos, Chandrashekhar Thejaswi Ps, Kiran Bynam, Young Jun Hong, Chang Soon Park, Manoj Choudhary
  • Patent number: 10141917
    Abstract: Various techniques are provided to efficiently implement user designs in programmable logic devices (PLDs). In one example, a programmable logic device (PLD) includes a plurality of programmable logic blocks (PLBs) and at least first and second logic cells within at least one of the PLBs, where each logic cell includes a lookup table (LUT) and associated mode logic configured to receive a LUT output signal from the LUT. The associated mode logic is configured to use a single physical signal output to provide a logic cell output signal corresponding to a selected logic function operational mode, ripple arithmetic operational mode, or extended logic function operational mode for each logic cell.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: November 27, 2018
    Assignee: Lattice Semiconductor Corporation
    Inventors: Brad Sharpe-Geisler, Senani Gunaratna, Ting Yew
  • Patent number: 10142067
    Abstract: A physical layer (PHY) data unit is received via an orthogonal frequency division multiplexing (OFDM) communication channel. The PHY data unit includes (i) a first set of one or more short OFDM symbols generated using a normal tone spacing and (ii) a second set of one or more long OFDM symbols generated using a reduced tone spacing, (iii) an OFDM symbol indicator indicative of a number of OFDM symbols in at least one of (a) the first set of OFDM symbols and (b) the second set of OFDM symbols; Based at least in part on the OFDM symbol indicator, (i) a number of short OFDM symbols in the set of one or more short OFDM symbols and (ii) a number of long OFDM symbols in the set of one or more long OFDM symbols are determined.
    Type: Grant
    Filed: April 16, 2015
    Date of Patent: November 27, 2018
    Assignee: Marvell World Trade Ltd.
    Inventors: Rui Cao, Xiayu Zheng, Hongyuan Zhang
  • Patent number: 10056929
    Abstract: An antenna subsystem receives an analog desired signal, noise, and interference via a communication channel. The desired signal includes modulated encoded digital information. A local oscillator (LO) modulation subsystem generates a modulated LO. The LO modulation subsystem generates a modulated LO to maximize the symbol signal-to-noise ratio of the decoded digital information based on a plurality of: the desired signal, the interference and the noise expected in the communication channel, the characteristics of the converter, and the ability of the DSP to remove the Modulated LO from the converted signal. A mixer mixes the received signal and the modulated LO. A converter converts the mixed signal from analog to digital. A digital signal processor (DSP) removes the modulated LO and desired signal modulation, and decodes the desired signal encoded digital information.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: August 21, 2018
    Assignee: GOOGLE LLC
    Inventors: Mark Rich, Paul Kolodzy
  • Patent number: 10051687
    Abstract: The present document relates to a wireless communication system and, more particularly, to a method for transmitting a frame in a high-density wireless LAN system, and a station device for performing the method. To this end, a station for transmitting a frame is comprised of a radio frame for a second type station comprising a frame portion for a first type station and a frame portion for the second type station, wherein the frame portion for the first type station comprises a first OFDM symbol for transmitting a signaling field (L-SIG) for the first type station, and the frame portion for the second type station comprises one or more second OFDM symbols for transmitting a signaling field (HE-SIG) for the second type station. Additionally, the radio frame for the second type station further comprises one or more third OFDM symbols for transmitting the L-SIG and the HE-SIG repeatedly.
    Type: Grant
    Filed: April 8, 2015
    Date of Patent: August 14, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Dongguk Lim, Wookbong Lee, Jinyoung Chun, Jinsoo Choi, Hangyu Cho, Eunsung Park
  • Patent number: 10044476
    Abstract: A first set of orthogonal frequency domain multiplexing (OFDM) symbols for a first portion of a PHY data unit and a second set of OFDM symbols for a second portion of the PHY data unit are generated. OFDM symbols of the first set are generated with a first OFDM tone spacing. At least some OFDM symbols of the second set are generated with a second tone spacing different from the first tone spacing. A value for a length indicator indicative of a duration of the PHY data unit is determined based on the first tone spacing and the second tone spacing. The first portion of the PHY data unit is generated to include (i) the first set of OFDM symbols and (ii) the length indicator set to the determined value. The second portion of the PHY data unit is generated to include the second set of OFDM symbols.
    Type: Grant
    Filed: April 16, 2015
    Date of Patent: August 7, 2018
    Assignee: Marvell World Trade Ltd.
    Inventors: Rui Cao, Xiayu Zheng, Hongyuan Zhang
  • Patent number: 9948436
    Abstract: A receiver comprises a radio frequency demodulation circuit configured to detect and to recover a received signal. The received signal has been formed and transmitted by a transmitter to carry the payload data as Orthogonal Frequency Division Multiplexed (OFDM) symbols in one or more of a plurality of time divided frames, each frame including a preamble including a plurality of bootstrap OFDM symbols, one or more of the bootstrap OFDM symbols of the preamble carrying signalling data represented as a relative cyclic shift of a signature sequence which has been combined with the one or more of the bootstrap OFDM symbols.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: April 17, 2018
    Assignee: SONY CORPORATION
    Inventor: Samuel Asangbeng Atungsiri
  • Patent number: 9949031
    Abstract: A system for processing audio data comprising an amplifier configured to receive an audio signal and to perform nonlinear processing on the audio signal. An encoder coupled to the amplifier, the encoder configured to receive the nonlinearly processed audio signal and to encode the nonlinearly processed audio signal into a data transmission format. A transmitter configured to receive and transmit the encoded nonlinearly processed audio signal. A receiver configured to receive the transmitted encoded nonlinearly processed audio signal and to decode the encoded nonlinearly processed audio signal. A digital voice processor configured to receive the nonlinearly processed audio signal and to use the nonlinearly processed audio signal for echo estimation and to subsequently subtract the estimated echo signal from a microphone signal.
    Type: Grant
    Filed: April 10, 2013
    Date of Patent: April 17, 2018
    Assignee: SYNAPTICS INCORPORATED
    Inventors: Mouna Elkhatib, Trausti Thormundsson, Jonathan Chien, Yair Kerner
  • Patent number: 9935738
    Abstract: Disclosed is a broadcast signal transmitter. The broadcast signal transmitter includes a first bit interleaved coded modulation (BICM) unit configured to forward error correction (FEC)-encode data of a first layer, a second BICM unit configured to FEC-encode data of a second layer, a layered division multiplexing (LDM) injection unit configured to combine the data of the first layer and the data of the second layer and to output LDM data, a framing and interleaving unit configured to interleave the LDM data and to generate a signal frame, and a waveform generation unit configured to perform OFDM modulation on the LDM data and to generate a broadcast signal.
    Type: Grant
    Filed: February 24, 2016
    Date of Patent: April 3, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Jongseob Baek, Jongwoong Shin, Woosuk Ko, Sungryong Hong
  • Patent number: 9917613
    Abstract: A digitally controlled phase shifter and (optional) attenuator circuit that has both a broad range as well as a fine-tuning resolution. Embodiments maintain a full 360° phase range while providing nth-bit least-significant bit (LSB) resolution across the entire range of possible phase shift and attenuation states, and compensate for the effect of frequency and/or PVT variations. In embodiments, two or more range partitionings can be defined that can be monotonic over respective sub-ranges while providing full coverage when combined. One such partitioning is a “coarse+fine” architecture. Embodiments of the coarse+fine architecture provide for greater than 360° of range for phase shifting and more than the total nominal design level for attenuation, and provide for fine ranges for both phase shifting and attenuation that are greater than the LSB of the corresponding coarse ranges for phase shifting and attenuation.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: March 13, 2018
    Assignee: pSemi Corporation
    Inventors: Peter Bacon, Matt Allison, Ravindranath Shrivastava
  • Patent number: 9794958
    Abstract: An example method of mapping a plurality of modulation symbols of a plurality of physical layer pipes present in a frame to a resource grid of data cells for the frame is described. The modulation symbols of the plurality of physical layer pipes are represented by a two-dimensional array comprising the modulation symbol values for the plurality of physical layer pipes and the resource grid of data cells is represented by a one-dimensional sequentially indexed array.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: October 17, 2017
    Assignee: One Media, LLC
    Inventors: Mark Earnshaw, Michael J. Simon, Kevin A. Shelby
  • Patent number: 9716607
    Abstract: A plurality of training fields of a preamble of a multi-user physical layer data unit are generated, and training fields of the plurality of training fields are mapped to respective signal streams of a plurality of streams using a mapping matrix, where different portions of each column of the mapping matrix correspond to different client devices. A first signal field of the preamble of the data unit corresponding to a first client device is generated, and the first signal field is mapped to a first set of signal streams using a first portion of a column of the mapping matrix. A second signal field of the preamble of the data unit corresponding to the second client device is generated, and the second signal field is mapped to a second set of signal streams using a second portion of the column of the mapping matrix.
    Type: Grant
    Filed: May 4, 2015
    Date of Patent: July 25, 2017
    Assignee: Marvell World Trade Ltd.
    Inventors: Hongyuan Zhang, Sudhir Srinivasa
  • Patent number: 9628159
    Abstract: A transmission device comprising: a weighting circuity which, in operation, generates transmission signals of n streams (n is an integer of 3 or more) by weighting modulated signals of the n streams using a predetermined fixed precoding matrix; a phase changing circuity which, in operation, regularly changes each phase of a symbol series included in each of the transmission signals of the n streams; and a transmitter which, in operation, transmits the transmission signals of the n streams from different antennas, the phases of each of the transmission signals of the n streams being changed in each symbol, wherein the transmission signal of an i-th stream has an mi kind of phase change value yi(t) (i is an integer between 1 and n (inclusive), 0?yi<2?, and mi is set in each stream, t is an integer of 0 or more, and indicates a symbol slot), and the phase changing circuity changes the phase in one or more u (u=m1×m2× . . .
    Type: Grant
    Filed: February 1, 2016
    Date of Patent: April 18, 2017
    Assignee: SUN PATENT TRUST
    Inventors: Yutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi
  • Patent number: 9571325
    Abstract: In a transmission circuit that transmits transmission data using an amplitude shift modulation method (ASK modulation method) for changing an amplitude of carrier waves based on the transmission data or a transmission system that uses the transmission circuit, a phase of the carrier waves is changed based on the transmission data to suppress an irradiation of carrier wave components.
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: February 14, 2017
    Assignee: SONY CORPORATION
    Inventor: Norihito Mihota
  • Patent number: 9529775
    Abstract: A hierarchical ring network comprising a plurality of nodes coupled in a base ring configuration such that each node is coupled to two adjacent nodes via base links, wherein the nodes are further coupled via a first level binary shortcut ring such that alternating nodes along the base ring act as first level nodes, and wherein each first level node is coupled to two nearest adjacent first level nodes via the first level binary shortcut ring.
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: December 27, 2016
    Assignee: Futurewei Technologies, Inc.
    Inventors: Iulin Lih, William Lynch
  • Patent number: 9444654
    Abstract: Multi-drop communications channels can have significantly deep notches in their frequency response causing a corresponding limitation of the effective data transmission rate. A special time-ordered coding method is described which results in the emitted spectrum of the data stream transmitted into the channel having a notch at the same frequency as the notch in the channel frequency response, permitting channel receivers to successfully decode the transmitted data stream. The described coding method may be applied at various multiples of the channel notch frequency to support different throughput rates, and may be combined with other coding techniques such as group or vector signaling codes.
    Type: Grant
    Filed: July 20, 2015
    Date of Patent: September 13, 2016
    Assignee: KANDOU LABS, S.A.
    Inventors: Ali Hormati, Amin Shokrollahi
  • Patent number: 9385902
    Abstract: Disclosed are an apparatus and a method for transmitting a tag. The apparatus for transmitting a tag converts 2 bits of a plurality of bit data into one symbol using phase information and orthogonal information.
    Type: Grant
    Filed: April 28, 2015
    Date of Patent: July 5, 2016
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Sang Hyun Mo, Kyu Won Han, Chan-Won Park, Hyochan Bang, Dong-Beom Shin
  • Patent number: 9379930
    Abstract: A transmitter device with I/Q mismatch compensation and a method thereof are provided. The transmitter device includes a transmitter circuit, a loop-back circuit and a baseband circuit. The transmitter circuit is configured to convert a baseband signal into an RF signal based on a specific gain configuration of a plurality of gain configurations. The loop-back circuit is configured to retrieve the RF signal from the transmitter circuit. The baseband circuit is configured to compensate the baseband signal by specific transmitter I/Q mismatch corresponding to the specific gain configuration, wherein a plurality of transmitter IQ mismatches are determined for the plurality of gain configurations by the retrieved RF signal, and the specific transmitter I/Q mismatch among the plurality of transmitter IQ mismatches is determined by the retrieved RF signal, which is converted in response to the specific gain configuration, from the loop-back circuit.
    Type: Grant
    Filed: April 2, 2015
    Date of Patent: June 28, 2016
    Assignee: MEDIATEK INC.
    Inventors: Hsin-Hung Chen, Hsiang-Hui Chang
  • Patent number: 9342716
    Abstract: Devices and methods for reading multiple types of RFID tags having different frequencies and/or encoding schemes are disclosed. One or more search signals covering a plurality of RFID bands are transmitted. A presence indication of an RFID tag in one of the plurality of RFID bands is detected. An interrogating signal having a carrier frequency tuned to a frequency at which the presence indication is detected is transmitted. A tag response signal comprising tag information associated with the RFID tag is received. A digital response signal based on the tag response signal is digital signal processed to obtain the tag information.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: May 17, 2016
    Assignee: CareFusion 303, Inc.
    Inventors: Mark Raptis, Graham Ross
  • Patent number: 9325551
    Abstract: This application discusses, among other things, apparatus and methods for suppressing irrelevant edges of a phase modulated signal. In an example, a method can include receiving phase modulation information at a suppression circuit of a communication device, computing distances between transitions of a phase modulation signal, the phase modulation signal associated with the phase modulation information, comparing the distances to a threshold distance at a comparator of the suppression circuit, and suppressing a first transition of the phase modulation signal associated with the phase modulation information if a first distance is less than the threshold distance.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: April 26, 2016
    Assignee: Intel Corporation
    Inventors: Stefan Meier, Matthias Schoebinger, Lajos Gazsi
  • Patent number: 9294321
    Abstract: In one embodiment, a communication device comprises a differential encoder to receive data for transmission and encode the data for transmission using a set of codes that, when processed by the differential encoder, place the differential encoder in a known state and generate uncorrelated output sequences.
    Type: Grant
    Filed: May 14, 2010
    Date of Patent: March 22, 2016
    Assignee: The Boeing Company
    Inventor: Gregory M. Gutt
  • Patent number: 9276632
    Abstract: A multichannel communications medium may have two or more channels available for transmitting information. A first transmission signal and a second transmission signal may be prepared from a same analog signal to be transmitted on a first channel and a second channel. For example, a phase shift or amplitude shift may be performed on the first transmission signal or the second transmission signal. The first transmission signal may be transmitted via the first channel, and the second transmission signal may be transmitted via the second channel. The phase shift or amplitude shift may be performed by analog components that are less complex than digital signal processors used for digital signal diversity. The analog components may be digitally controlled. The analog signal diversity may utilize cost effective analog components to improve the performance of the communications system over single channel communications without requiring complex digital signal processing of multiple signal paths.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: March 1, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Richard Joseph McConnell, Faisal Mahmood Shad
  • Patent number: 9264540
    Abstract: A method and apparatus are provided for presenting multimedia content to a caller and/or a called party in association with a telephone call. Content may be presented pre-ring (before the called party's telephone rings), in-call, and/or post-call. Content presented to a party may be related to another party participating in the call or may be related to a third party (e.g., an advertiser that paid for the ability to have its content presented). Presented content may be actuable, to allow a caller to change the destination of a call, take advantage of an offer presented to him or her, redeem a coupon, schedule or queue a subsequent call, etc. To find a desired destination party, a caller may initiate a manual or automatic search of his or her local contacts (on his telephone) and/or a central or global directory or contact list.
    Type: Grant
    Filed: July 9, 2014
    Date of Patent: February 16, 2016
    Inventor: Wendell D. Brown
  • Patent number: 9172472
    Abstract: Method for modulating a carrier light wave to achieve, a modulated light wave which carries information by symbols selected from a set of at least two different symbols. The light led through each path is phase-shifted by a respective total variable part phase shift, which for each path is the sum of at least three respective variable part phase shifts. Each variable part phase shift for each modulation state assumes one of two respective predetermined values, and each symbol is modulated using a respective combination of two such total variable part phase shifts. The modulation performed by the two paths is a PSK (Phase Shift Keying) modulation scheme, the group of symbols includes 2N unique symbols, the light led through each respective path is phase shifted using 2N?1 variable part phase shifts, and the respective difference between the respective predetermined values is the same for all variable part phase shifts.
    Type: Grant
    Filed: September 4, 2013
    Date of Patent: October 27, 2015
    Assignee: FINISAR SWEDEN AB
    Inventors: Christopher Daunt, Peter Szabo, Jan-Olof Wesstrom, Urban Eriksson
  • Patent number: 9160587
    Abstract: A receiver determines phase and frequency information from data signals that carry information from a transmitter to a receiver, instead of or in addition to, information from control signals. In a specific embodiment, the information is obtained from data signals modulated as a binary phase-shift keying (“BPSK”) waveform by demodulation. Other phase-shift keyings might be used instead. Encoded information might be recovered in received OFDM packets by receiving OFDM subcarriers modulated with the two low data rates supported by IEEE 802.11 standard(s) wherein the subcarriers encoding the packet are modulated using binary phase shift keying and the encoding information is at a zero phase or a ? (pi) phase offset on each of the subcarriers. Determining the carrier frequency might be done by calculating the square of each of subcarrier signal and/or determining the phase offset of the subcarriers even with information modulated onto the subcarriers.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: October 13, 2015
    Assignee: Atmel Corporation
    Inventors: Athos Kasapi, Sriram Sundararajan
  • Patent number: 9130806
    Abstract: A wideband phase modulator comprises a multiphase generator, a phase selector, and a phase adjuster. The wideband phase modulator is configured to receive an N-bit digital phase-modulating signal comprising a timed sequence of N-bit phase-modulating words, where N is a positive integer representing the bit resolution of the N-bit digital phase-modulating signal. The multiphase generator generates a plurality of coarse carrier phases, all having the same carrier frequency but each offset in phase relative to the other. The M most significant bits of the N-bit phase-modulating words are used to form M-bit phase select words that control the output phase of the phase selector. The phase adjuster performs a precision rotation operation, whereby a selected coarse carrier phase is adjusted so that the phase of the resulting final precision phase-modulated signal more closely aligns with a desired precision phase.
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: September 8, 2015
    Inventor: Earl W. McCune, Jr.
  • Patent number: 9077406
    Abstract: A precoding processing method and user equipment are disclosed. The precoding processing method includes: selecting a codebook vector for performing precoding processing for data among a codebook set of Nt antennas, where the codebook set includes a first codebook vector ? [ A B ] of a uniform linear array and a second codebook vector ? [ A - B ] generated according to the first codebook vector, where A is a (Nt/2)×1 vector composed of a first half of elements of the first codebook vector, B is a (Nt/2)×1 vector composed of a last half of elements of the first codebook vector, and Nt is a positive even number; and sending an index number of the codebook vector to a base station, whereupon the base station uses the codebook vector corresponding to the index number to perform precoding processing for the data to be transmitted by the antennas. Embodiments of the present invention make the codebook set compatible with two types of antenna configuration modes.
    Type: Grant
    Filed: October 29, 2014
    Date of Patent: July 7, 2015
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yongxing Zhou, Qiang Wu, Chi Gao
  • Patent number: 9071362
    Abstract: A method of transmitting data. The method comprises preliminarily providing a modulation scheme comprising an N-symbol constellation defined in an M-dimensional space, wherein N<2M, and a composite distance between a given pair of symbols within the constellation increases with increasing Hamming distance between data words encoded in each of those symbols. During run-time, a data signal to be transmitted is encoded as symbols of the constellation, and modulated onto at least M dimensions of a carrier light in accordance with the symbols.
    Type: Grant
    Filed: October 19, 2012
    Date of Patent: June 30, 2015
    Assignee: CIENA CORPORATION
    Inventors: Mahmoud Taherzadehboroujeni, Shahab Oveis Gharan, Kim B. Roberts
  • Patent number: 9042486
    Abstract: In an angle modulated radio transmitter, the total power is the same when modulated or unmodulated. Angle modulation produces multiple sideband pairs. The power in the sidebands is derived from the carrier. When a complex modulating waveform is used, the power (and therefore the amplitude) of the carrier varies. A system and method is provided for dramatically minimizing, to nearly zero, the bandwidth needed to transmit digital information using sideband suppression of angle modulated signals. The systems described use various techniques to suppress sideband pairs, leaving the carrier signal. The amplitude variations of the carrier are used to convey information. In some examples, techniques are used to filter and/or phase out one or more sideband pairs, leaving the carrier signal.
    Type: Grant
    Filed: October 10, 2014
    Date of Patent: May 26, 2015
    Assignee: ZBW LLC
    Inventor: Sam Cowan
  • Patent number: 9031165
    Abstract: In a phased-array communications system with a distributed processing architecture, channelized beamforming is used to minimize sampling and computational requirements, as well as reduce the data rates required for the communication of data and control information between system components. A central processor within the phased array system performs parallelized synthesis of channelized beams to form beams composite beams in sub-bands that overlap multiple channels. The phased array system incorporates a flexible scheme for channelization, channelized beamforming, and synthesis so that any number of composite beams may be synthesized in parallel at any one time. The system is capable of simultaneously processing beams that occupy overlapping subbands, and does not require restriction on the bandwidths or center frequencies of the subbands which the beams occupy.
    Type: Grant
    Filed: March 18, 2014
    Date of Patent: May 12, 2015
    Assignee: Cubic Corporation
    Inventor: Wayne Edward Richards
  • Publication number: 20150117570
    Abstract: In an angle modulated radio transmitter, the total power is the same when modulated or unmodulated. Angle modulation produces multiple sideband pairs. The power in the sidebands is derived from the carrier. When a complex modulating waveform is used, the power (and therefore the amplitude) of the carrier varies. A system and method is provided for dramatically minimizing, to nearly zero, the bandwidth needed to transmit digital information using sideband suppression of angle modulated signals. The systems described use various techniques to suppress sideband pairs, leaving the carrier signal. The amplitude variations of the carrier are used to convey information. In some examples, techniques are used to filter and/or phase out one or more sideband pairs, leaving the carrier signal.
    Type: Application
    Filed: October 10, 2014
    Publication date: April 30, 2015
    Inventor: Sam Cowan
  • Patent number: 9020066
    Abstract: Single-bit transmitter modulator having a digital pulse shaping filter configured to shape data pulses of an inphase signal and quadrature signal; an upsampling filter configured to increase the sample rate of the inphase signal and quadrature signal; a sigma-delta modulator providing a one-bit inphase output signal and a one-bit quadrature output signal; an inphase low-order analog low pass filter coupling the one-bit inphase output signal to an inphase channel input of a quadrature modulator, and a quadrature low-order analog low pass filter coupling the one-bit quadrature output signal to a quadrature channel input of a quadrature modulator; and, wherein the quadrature modulator is connected to a carrier signal generator and is configured to generate an inphase and quadrature modulated carrier.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: April 28, 2015
    Assignee: Innophase Inc.
    Inventors: Yang Xu, Xuejun Zhang
  • Patent number: 9019031
    Abstract: A method for phase modulation of a carrier signal from a transmitter to a contactless transponder in which data is coded as consecutive symbols, each corresponding to a predefined number of carrier cycles, and in which a symbol time is at least two cycles of the carrier signal includes, at the transmitter, spreading a phase jump of a symbol in relation to a preceding symbol over a first part of the symbol time. The establishment of the phase jump is completed in the first part of the symbol time. The periods of the cycles are constant during a second part of the symbol time.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: April 28, 2015
    Assignee: Commissariat à l'énergie atomique et aux énergies alternatives
    Inventors: Jacques Reverdy, Elisabeth Crochon, Francois Dehmas, Florian Pebay-Peyroula
  • Patent number: 9001939
    Abstract: Provided is a transmitter for transmitting signals by means of the STBC method or the DSTBC method, wherein communication is carried out effectively. The transmitter for transmitting signals by means of the STBC method or the DSTBC method has the following configuration. A frame in which synchronization words are arranged at specified positions is used. An encoding means in the transmitter encodes the entire frame to be transmitted including the synchronization words, by means of the STBC method or the DSTBC method. It is also possible to implement a communication system and a communication method for communicating signals by means of the STBC method or the DSTBC method.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: April 7, 2015
    Assignee: Hitachi Kokusai Electric Inc.
    Inventors: Hiroyuki Akutagawa, Takehiko Kobayashi
  • Patent number: 9002301
    Abstract: Embodiments of the present disclosure provide system and method for generating a transmission signal. A transmitter generates and transmits a transmission signal based on signal components. Circuitry that is coupled to the transmitter receives complex plane components of a signal to be transmitted and alters the signal such that a complex plane trajectory of the signal passes nearer to an origin of a complex plane of the complex plane trajectory than does an original complex plane trajectory of the signal. The circuitry determines the signal components to be transmitted by the transmitter based on the altered signal.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: April 7, 2015
    Assignee: Marvell International Ltd.
    Inventors: Luca Vercesi, Fernando De Bernardinis
  • Patent number: 9001931
    Abstract: The present invention relates to a digital modulation method and a corresponding modulator. The modulator comprises a transcoder (110) followed by a FIFO register (120) and a 2-PSK modulator (130). The transcoder codes a binary word of fixed size into a code word of variable size using a transcoding table. The transcoding table codes at least one first binary word, leading to a first number of phase transitions at the output of the modulator, into a second word of size greater than that of the first word, leading to, at the output of the modulator, a second number of phase transitions less than the first number of phase transitions.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: April 7, 2015
    Assignee: Commissariat a l'énergies Atomique et aux énergies alternatives
    Inventors: Florian Pebay-Peyroula, Jean-Baptiste Dore
  • Patent number: 9001930
    Abstract: Signal (SIF) field capacity can be significantly increased by encoding SIG field data using two streams in accordance with a space-time block code (STBC) encoding scheme. Dual-stream SIG field encoding allows for the utilization of higher order modulation schemes, such as quadrature phase-shift keying (QPSK), which increases SIG field capacity. Dual-stream encoded SIG fields are transmitted using an omnidirectional beam to allow mobile stations to accurately decode the SIG field irrespective of their spatial location.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: April 7, 2015
    Assignee: FutureWei Technologies, Inc.
    Inventors: Junghoon Suh, Osama Aboul-Magd, Kwok Shum Au
  • Patent number: 9001929
    Abstract: A method and an apparatus for a transmitter to transmit data in a wireless communication system are provided. This method includes: generating a first signal field including at least one symbol; generating a second signal field configured by repeating at least one symbol of the first signal field; and transmitting a frame including the first signal field, the second signal field, and a data field and a first symbol of the second signal field is modulated through binary phase shift keying (BPSK) and symbols from a second symbol of the second signal field are modulated through Q-BPSK. According to the present invention, a service filed can be extended while maintaining compatibility with a wireless communication system in the related art by transmitting a frame using symbol repetition.
    Type: Grant
    Filed: January 10, 2012
    Date of Patent: April 7, 2015
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Il Gu Lee, Heejung Yu, Hun Sik Kang, Sok Kyu Lee
  • Publication number: 20150092888
    Abstract: An transmitting apparatus is provided. The transmitting apparatus includes a modulator which performs a QPSK-modulation for original data by using a different constellation combination pattern by predetermined unit, and a transmitter which transmits the QPSK-modulated data. Accordingly, BEP performance may be improved by transmitting additional data according to a constellation combination patter in hidden form.
    Type: Application
    Filed: October 1, 2014
    Publication date: April 2, 2015
    Inventors: Dong Seog Han, Eun Su Kang
  • Patent number: 8995537
    Abstract: The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting uplink control information in a wireless communication system. A method for transmitting uplink control information in a wireless communication system according to one embodiment of the present invention comprises a step of repetition coding information bit of N-bit to generate an encoded bit; and a step of transmitting the encoded bit via a physical uplink shared channel, wherein bit inversion can be applied to the bit obtained by repeating the information bit of N-bit, on the basis of the number 1 contained in the information bit of N-bit.
    Type: Grant
    Filed: April 27, 2011
    Date of Patent: March 31, 2015
    Assignee: LG Electronics Inc.
    Inventors: Hyun Soo Ko, Moon Il Lee, Ji Woong Jang, Jae Hoon Chung, Seung Hee Han
  • Publication number: 20150078487
    Abstract: Certain aspects of the present disclosure relate to a method for modulating single carrier signals using constant envelope 2-CPM modulation and quasi-constant envelope filtered continuously rotated pseudo-PSK modulation in a wireless communication system.
    Type: Application
    Filed: June 25, 2014
    Publication date: March 19, 2015
    Inventor: Ismail Lakkis
  • Patent number: 8982990
    Abstract: Wireless communication wherein channel estimation accuracy is improved while keeping the position of each bit in a frame, even when a modulation system having a large modulation multiple value is used for a data symbol. An encoding operation encodes and outputs transmitting data (bit string) and a bit converting operation converts at least one bit of a plurality of bits constituting a data symbol to be used for channel estimation, among the encoded bit strings, into or ‘0’ or ‘0’. A modulating operation modulates the bit string inputted from the bit converting operation by using a single modulation mapper and a plurality of data symbols are generated.
    Type: Grant
    Filed: July 8, 2014
    Date of Patent: March 17, 2015
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Kenichi Miyoshi, Hidetoshi Suzuki, Katsuhiko Hiramatsu, Christian Wengerter, Alexander Golitschek Edler Von Elbwart
  • Publication number: 20150071385
    Abstract: A system and method that scrambles the phase characteristic of a carrier signal are described. The scrambling of the phase characteristic of each carrier signal includes associating a value with each carrier signal and computing a phase shift for each carrier signal based on the value associated with that carrier signal. The value is determined independently of any input bit value carried by that carrier signal. The phase shift computed for each carrier signal is combined with the phase characteristic of that carrier signal so as to substantially scramble the phase characteristic of the carrier signals. Bits of an input signal are modulated onto the carrier signals having the substantially scrambled phase characteristic to produce a transmission signal with a reduced PAR.
    Type: Application
    Filed: November 13, 2014
    Publication date: March 12, 2015
    Inventor: Marcos C. Tzannes
  • Patent number: 8976901
    Abstract: A phase shift keying transmitter circuit that includes: a variable frequency conversion stage adapted to receive a first data signal, wherein the variable frequency conversion stage comprises a plurality of frequency modulating elements, wherein the first data signal controls the number of the plurality of frequency modulating elements that are operated so as to control an operating frequency of the variable frequency conversion stage; and an output stage configured to switch between one of two possible outputs, the signals provided by one of the two possible outputs having an opposite polarity to the other, wherein the output stage is configured to receive a second data signal to control the switching between the two possible outputs, wherein the output stage is coupled to the variable frequency conversion stage and wherein the switching between the two possible outputs changes the phase of a signal from the variable frequency conversion stage by 180°.
    Type: Grant
    Filed: May 25, 2011
    Date of Patent: March 10, 2015
    Assignee: Agency for Science, Technology and Research
    Inventors: Shengxi Diao, Yuan Gao, Yuanjin Zheng
  • Patent number: 8971450
    Abstract: A transmission device for transmitting a signal in a wireless communication system is provided. The transmission device includes: a serial-to-parallel converter configured to convert an input serial bit stream into a parallel bit stream having three bits; and a phase rotation symbol mapper configured to map the parallel bit stream to a symbol having phase rotation characteristics, wherein when the parallel bit stream includes first to third bits, the phase rotation symbol mapper maps the second and third bits to a complex variable and sequentially maps a real number part and an imaginary number part of the complex variable to the front part and the rear part of a symbol in this order or to the rear part and the front part of the symbol in this order.
    Type: Grant
    Filed: November 16, 2011
    Date of Patent: March 3, 2015
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jung Yeol Oh, Hyungsoo Lee, Sang Sung Choi
  • Publication number: 20150043680
    Abstract: This invention proposes an alternative modulation format for channels that present improved performance when such channels co-propagate with existing intensity modulated channels. This modulation format is named Rhombic-QPSK (R-QPSK) and it is designed in such a way that it presents more tolerance to phase noise created by the nonlinear interaction with the legacy channels.
    Type: Application
    Filed: August 11, 2014
    Publication date: February 12, 2015
    Applicant: NEC LABORATORIES AMERICA, INC.
    Inventors: Eduardo Mateo Rodriquez, Fatih Yaman, Shaoliang Zhang, Ting Wang
  • Patent number: 8948292
    Abstract: In determining an angle for a phase modulation scheme, a key is generated from a prescribed set of bits contained in a symbol. The symbols have an in-phase (I) data word and a quadrature phase (Q) data word that identify coordinates of the symbols in a complex number plane. An angle is retrieved from a memory table from a storage location identified by the key. Each angle in the memory table is established in accordance with constraints under which the memory table was populated so as to be mapped to a phase angle identifying other coordinates in the complex number plane that are within a specified neighborhood about the coordinates of each of the symbols. A signal is generated to convey the symbols as phase differentials at each sample time between a reference phase and the phase angle.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: February 3, 2015
    Assignee: Exelis Inc.
    Inventor: William J. Taft