Frequency Shift Keying Patents (Class 375/303)
  • Patent number: 10148468
    Abstract: A multi building block architecture may be configured to generate a waveform (a “target wideband signal”) for use in a wireless communication system, where the waveform supports a variety of baseband signals. The task of generating a target wideband signal can be divided into several tasks, each task relating to the generating of one of a plurality of sub-carrier bands. Each of the sub-carrier bands (sub-bands) may be generated by one of the sub-band building units included in the sub-band building blocks of the architecture. Several sub-bands may be formed, by a sub-band group building block, into a sub-band group. Multiple sub-band groups may be formed, by a wideband building block, into the target wideband signal.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: December 4, 2018
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Lan Hu, Ming Jia, Wen Tong
  • Patent number: 10020904
    Abstract: A method and an apparatus for transmitting broadcast signals thereof are disclosed. The apparatus for transmitting broadcast signals comprises an encoder encoding service data, a time interleaver interleaving the encoded service data, a mapper mapping the interleaved service data into a plurality of OFDM (Orthogonal Frequency Division Multiplex) symbols to build at least one signal frame, a frequency interleaver interleaving data in the at least one signal frame by using a different interleaving-seed which is used for every OFDM symbol pair comprised of two sequential OFDM symbols, wherein the frequency interleaver calculates an interleaving address for the different interleaving-seed based on a main-PRBS sequence and a cyclic shifting value, a modulator modulating the frequency interleaved data by an OFDM scheme and a transmitter transmitting the broadcast signals having the modulated data, wherein an interleaving-seed is generated based on a cyclic shift value and an FFT size of the modulating.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: July 10, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Jongseob Baek, Jaehyung Kim, Woosuk Ko, Sungryong Hong
  • Patent number: 9806930
    Abstract: A broadcast signal receiver according to the present invention comprises: a demodulator for performing OFDM demodulation on a received broadcast signal including a frame for the delivery of a broadcast service: a frame demapper for outputting the frame, the frame including a preamble that contains first signaling information, and a plurality of link-layer-pipes (LLPs) that contain PLP data, second signaling information and third signaling information, with the PLP data including a base layer and an enhancement layer of the broadcast service; and a decoder for decoding the first signaling information, for decoding the second and third signaling information, and for selectively decoding the PLP data by using the third signaling information.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: October 31, 2017
    Assignee: LG ELECTRONICS INC.
    Inventors: Hotaek Hong, Sangchul Moon, Joonhui Lee, Woosuk Ko
  • Patent number: 9608781
    Abstract: A method and an apparatus for transmitting broadcast signals thereof are disclosed. The apparatus for receiving broadcast signals, the apparatus comprises a receiver to receive the broadcast signals, a demodulator to demodulate the received broadcast signals by an OFDM (Orthogonal Frequency Division Multiplex) scheme, a frame parser to parse a signal frame from the demodulated broadcast signals, wherein the signal frame includes at least one service data, a time deinterleaver to time deinterleave each the service data, wherein the time deinterleaving is performed depending on a number of physical paths for each the service data, a damapper to demap the time deinterleaved data and a decoder to decode the demapped service data.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: March 28, 2017
    Assignee: LG Electronics Inc.
    Inventors: Jongseob Baek, Woosuk Ko, Sungryong Hong
  • Patent number: 9571323
    Abstract: A broadcast signal receiver is discussed. A broadcast signal receiver according to an embodiment of the present invention comprises a synchronization & demodulation module performing signal detection and OFDM demodulation on a received broadcast signal; a frame parsing & deinterleaving module performing parsing and deinterleaving of a signal frame of the broadcast signal; a demapping & decoding module performing conversion of data of at least one Physical Layer Pipe (PLP) of the broadcast signal into the bit domain and FEC decoding of the converted PLP data; and an output processing module outputting a data stream by receiving the at least one PLP data.
    Type: Grant
    Filed: January 14, 2016
    Date of Patent: February 14, 2017
    Assignee: LG Electronics Inc.
    Inventors: Jaehyung Kim, Woosuk Ko, Sungryong Hong
  • Patent number: 9553653
    Abstract: A method and an apparatus for transmitting broadcast signals thereof are disclosed. The apparatus for receiving broadcast signals, the apparatus comprises a receiver to receive the broadcast signals, a demodulator to demodulate the received broadcast signals by an OFDM (Orthogonal Frequency Division Multiplex) scheme, a frame parser to parse a signal frame from the demodulated broadcast signals, wherein the signal frame includes at least one service data, a time deinterleaver to time deinterleave each the service data, wherein the time deinterleaving is performed depending on a number of physical paths for each the service data, a damapper to demap the time deinterleaved data and a decoder to decode the demapped service data.
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: January 24, 2017
    Assignee: LG ELECTRONICS INC.
    Inventors: Jongseob Baek, Seoyoung Back, Woosuk Ko, Sungryong Hong
  • Patent number: 9425777
    Abstract: A phase interpolator has: a mixer configured to synthesize phases of a plurality of input cosine-wave or sine-wave signals whose phases are different from each other; and a bias generator configured to output a bias signal in accordance with a phase control signal to the mixer, and the mixer outputs a signal with a phase in accordance with the phase control signal.
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: August 23, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Yasufumi Sakai, Toshihiko Mori
  • Patent number: 9246563
    Abstract: The present invention particularly relates to a method and an apparatus for improving the efficiency of data transmission in a multi-user wireless transmission system.
    Type: Grant
    Filed: October 30, 2010
    Date of Patent: January 26, 2016
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Yu-Ro Lee, Jong-Ee Oh, Sok-Kyu Lee
  • Patent number: 9130679
    Abstract: Methods and systems for transmission and reception of ternary phase-shift keyed data that include mapping triplets of binary bits to pairs of ternary symbols, such that three bits of data are encoded across two symbols having three-point constellations; modulating the pairs of ternary symbols onto a carrier; and transmitting the modulated carrier across a transmission medium.
    Type: Grant
    Filed: April 2, 2012
    Date of Patent: September 8, 2015
    Assignees: NEC Laboratories America, Inc., NEC Corporation
    Inventors: Ezra Ip, Fatih Yaman, Lei Xu, Ting Wang, Yoshihisa Inada, Takaaki Ogata, Yasuhiro Aoki
  • Publication number: 20150139047
    Abstract: An entire radio transceiver can be easily integrated into one IC chip. In order to integrate the IF filters on the chip, a heterodyne architecture with a low IF is used. A single, directly modulated VCO is used for both up-conversion during transmission, and down-conversion during reception. Bond-wires are used as resonators in the oscillator tank for the VCO. A TDD scheme is used in the air interface to eliminate cross-talk or leakage. A Gaussian-shaped binary FSK modulation scheme is used to provide a number of other implementation advantages.
    Type: Application
    Filed: December 22, 2014
    Publication date: May 21, 2015
    Inventors: Karl Håkan Torbjörn GÄRDENFORS, Sven MATTISSON, Jacobus Cornelis HAARTSEN
  • Patent number: 9020072
    Abstract: The present invention provides a method for modulating a navigation signal, comprising: multiplying a data channel difference signal between upper and lower sidebands by a sine binary subcarrier to obtain an odd timeslot baseband signal of a branch Q, and multiplying a data channel sum signal of the upper and lower sidebands by a cosine binary subcarrier to obtain an odd timeslot baseband signal of a branch I of the data channel; multiplying a pilot channel difference signal between the upper and lower sidebands by the sine binary subcarrier to obtain an even timeslot baseband signal of the branch Q, and multiplying a pilot channel sum signal of the upper and lower sidebands by the cosine binary subcarrier to obtain an even timeslot baseband signal of the branch I; and performing QPSK modulation on the baseband signals of the branch I and branch Q to obtain a TD-AltBOC modulation signal.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: April 28, 2015
    Assignee: Huazhong University of Science and Technology
    Inventors: Zuping Tang, Jiaolong Wei, Tao Yan
  • Patent number: 9001933
    Abstract: A receiving apparatus receives an FSK signal, converts the FSK signal into a phasor including amplitude and phase, estimates and compensates for a CFO (carrier frequency offset) from the converted phasor, and recovers a data bit from the converted phasor.
    Type: Grant
    Filed: July 18, 2013
    Date of Patent: April 7, 2015
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Mi Kyung Oh, Byoung Hak Kim, Cheol-ho Shin, Jaehwan Kim, Sangsung Choi
  • 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: 20150071384
    Abstract: Transmitting and receiving arrangements and methods in a Digital Subscriber Line (DSL) system having a plurality of modems and vectored transmission capability. A first part of an available frequency band is reserved for vectored DSL transmission and reception using modems operating in the first part of the frequency band. The remaining, second, part of the available frequency band is reserved for both vectored and non-vectored transmission using modems operating in the second part of the frequency band.
    Type: Application
    Filed: November 17, 2014
    Publication date: March 12, 2015
    Inventors: Bo Engström, Frank Sjöberg, Hans Öhman
  • Patent number: 8964897
    Abstract: A transmitting device that transmits a FSK-modulated wireless signal to a receiving device includes a controller that determines a transmitting content transmitted to the receiving device and a value of a maximum frequency shift in the FSK modulation, and outputs output information including the transmitting content, the value of the maximum frequency shift, and a value of a center frequency in the FSK modulation; a generator that generates a FSK modulation signal based on the transmitting content, the value of the maximum frequency shift, and the value of the center frequency, which are output from the controller; and a transmitting antenna that transmits the FSK modulation signal, which is generated by the generator, in a form of a wireless signal.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: February 24, 2015
    Assignee: Omron Automotive Electronics Co., Ltd.
    Inventors: Yosuke Tomita, Hidemitsu Kawashima, Takashi Yamada
  • Patent number: 8942298
    Abstract: Data communication apparatus comprising transmission means adapted to transmit data as the ratio of pairs of frequencies between objects that are moving relative to one another. It is particularly applicable to acoustic data communications at ultrasound frequencies in air.
    Type: Grant
    Filed: December 11, 2006
    Date of Patent: January 27, 2015
    Assignee: Sonitor Technologies AS
    Inventors: Sverre Holm, Rune Holm
  • Patent number: 8942327
    Abstract: The present invention employs hierarchical modulation to simultaneously transmit information on different modulation layers using a carrier RF signal. Initially, first data to be transmitted is assigned to a first modulation layer and second data is assigned to a second modulation layer. In one embodiment of the present invention, the first and second data are assigned based on reliability criteria. The first and second modulation layers are hierarchical modulation layers of the carrier RF signal. Once assigned, the first data is transmitted using the first modulation layer of the carrier RF signal and the second data is transmitted using the second modulation layer of the carrier RF signal. In one embodiment of the present invention, information may be transmitted to one end user using one modulation layer, and information may be transmitted to a different end user using a different modulation layer.
    Type: Grant
    Filed: October 11, 2012
    Date of Patent: January 27, 2015
    Assignee: Apple Inc.
    Inventors: Ming Jia, Jianglei Ma, Peiying Zhu, Wen Tong, Curt Dodd
  • Publication number: 20140362952
    Abstract: According to embodiments of the present invention, a frequency shift keying transmitter is provided.
    Type: Application
    Filed: June 14, 2012
    Publication date: December 11, 2014
    Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
    Inventors: San Jeow Cheng, Yuan Gao, Yuanjin Zheng, Chun Huat Heng
  • Publication number: 20140334268
    Abstract: A method is described for emitting an insect behaviour modification signal to create a protected zone into which insect entry is minimized. The use of complex waveforms is described, emitted at frequencies from 150.000 Hz to 250.000 Hz. First and second waveforms are emitted at resonant frequencies to strengthen the protective effect. Further refinements include modulation of the transmitted signal, and frequency hopping of the transmitted signal.
    Type: Application
    Filed: December 9, 2011
    Publication date: November 13, 2014
    Inventor: Norma O'Hara
  • Publication number: 20140269993
    Abstract: A method and an apparatus provide a plurality of modulated signals by frequency shifting an output signal of a carrier signal generation circuit for obtaining a first carrier signal and a second carrier signal, and by modulating the first and second carrier signals.
    Type: Application
    Filed: March 13, 2013
    Publication date: September 18, 2014
    Inventors: Christian Mayer, Harald Pretl, Patrick Ossmann, Jan Zaleski, Krzysztof Dufrene
  • Patent number: 8831144
    Abstract: In an FSK receiver according to the present invention, a correction operation for a DC offset component is performed based on a maximum value and a minimum value of a demodulation signal. If a difference between the maximum and minimum values is less than a predetermined threshold value TH1, the correction operation is halted. Thus, the FSK receiver can rapidly perform an appropriate offset removal from a multi-level FSK signal.
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: September 9, 2014
    Assignee: Icom Incorporated
    Inventor: Kazunori Shibata
  • Patent number: 8831145
    Abstract: One embodiment of the present invention relates to a communications system. The system includes a Highway-Addressable Remote Transducer (HART) transmitter comprising a direct memory access (DMA) module configured to access at least one transmitter lookup table (LUT) using DMA transfers to modulate a HART data packet into a frequency-shift keying (FSK) data signal. The system also includes a HART receiver configured to demodulate a received FSK data signal into a demodulated HART data packet.
    Type: Grant
    Filed: May 18, 2011
    Date of Patent: September 9, 2014
    Assignee: Texas Instruments Incorporated
    Inventor: Thomas Ray Shelburne
  • Publication number: 20140226754
    Abstract: Disclosed is a method of transmitting dual digital signals through a single antenna. The method includes receiving, by a transmitter, a first data stream and a second data stream which use the same carrier frequency, modulating, by the transmitter, each of the first data stream and the second data stream, lowering, by the transmitter, a power level of the modulated second data stream, combining, by the transmitter, the modulated first data stream and the second data stream with the lowered power level, and transmitting, by the transmitter, the added first data stream and second data stream to a single antenna in the same channel.
    Type: Application
    Filed: October 28, 2013
    Publication date: August 14, 2014
    Applicant: GCT Semiconductor, Inc.
    Inventors: Eal Wan LEE, Dae Hong KIM, Jeong Min KIM
  • Patent number: 8804874
    Abstract: A polar transmitter includes a frequency modulating path, a clock divider and a digital processing block. The frequency modulating path is arranged for generating a frequency modulated clock in response to a frequency modulating signal. The clock divider is coupled to the frequency modulated clock, and arranged for generating a down-divided clock. The digital processing block is coupled to the down-divided clock, and arranged for generating the frequency modulating signal, wherein the frequency modulating signal is adjusted for frequency deviation of the frequency modulated clock. A method for polar transmission includes: generating a frequency modulated clock in response to a frequency modulating signal; dividing a frequency of said frequency modulated clock to generate a down-divided clock; and generating said frequency modulating signal according to said down-divided clock, wherein said frequency modulating signal is adjusted for frequency deviation of said frequency modulated clock.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: August 12, 2014
    Assignee: Mediatek Inc.
    Inventors: Chi-Hsueh Wang, Kai-Peng Kao, Robert Bogdan Staszewski
  • Publication number: 20140219393
    Abstract: The present invention provides a method for modulating a navigation signal, comprising: multiplying a data channel difference signal between upper and lower sidebands by a sine binary subcarrier to obtain an odd timeslot baseband signal of a branch Q, and multiplying a data channel sum signal of the upper and lower sidebands by a cosine binary subcarrier to obtain an odd timeslot baseband signal of a branch I of the data channel; multiplying a pilot channel difference signal between the upper and lower sidebands by the sine binary subcarrier to obtain an even timeslot baseband signal of the branch Q, and multiplying a pilot channel sum signal of the upper and lower sidebands by the cosine binary subcarrier to obtain an even timeslot baseband signal of the branch I; and performing QPSK modulation on the baseband signals of the branch I and branch Q to obtain a TD-AltBOC modulation signal.
    Type: Application
    Filed: March 27, 2012
    Publication date: August 7, 2014
    Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Zuping Tang, Jiaolong Wei, Tao Yan
  • Patent number: 8774196
    Abstract: The present disclosure relates to an active antenna array for a mobile communications network. The active antenna comprises a base band unit coupled to a base station, a plurality of transceiver units and at least one link. The plurality of transceiver units is terminated by at least one antenna element. The at least one link couples individual ones of the plurality of transceiver units to the base band unit 10. The at least one link is a digital link and is adapted to relay an individual transmit signal concurrently and in synchronisation with a transmit clock signal. The present disclosure further teaches a method for relaying radio signals in a mobile communications network. The present disclosure further relates to a computer program enabling a computer to manufacture the active antenna array of the present disclosure and to execute the method of relaying radio signal in a mobile communications system.
    Type: Grant
    Filed: June 3, 2010
    Date of Patent: July 8, 2014
    Assignee: Kathrein-Werke KG
    Inventors: Georg Schmidt, Johannes Schlee
  • Patent number: 8731108
    Abstract: Provided is a communication system that includes setting a detection threshold according to a distribution of at least one logic value of a transmission signal corresponding to an on-off keying (OOK) scheme or a frequency shift keying (FSK) scheme, and determining a type of noise source influencing a reception signal using the detection threshold and the distribution of at least one logic value.
    Type: Grant
    Filed: July 6, 2011
    Date of Patent: May 20, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joon Seong Kang, Hyo Sun Hwang, Chan Soo Hwang
  • Patent number: 8718190
    Abstract: A receiver/transmitter and related receiving/method capable of simultaneously receiving/transmitting discontinuous frequency band signal components of an input/output signal are provided. Phase swapping on in-phase/quadrature-phase local oscillation differential signals is applied to frequency down-conversion of the input signal or frequency up-conversion of a baseband signal to be outputted to radio domain, and thereby achieve simultaneously receiving discontinuous frequency bands of the input signal and simultaneously sending different baseband signal components on discontinuous frequency bands of the output signal.
    Type: Grant
    Filed: May 29, 2012
    Date of Patent: May 6, 2014
    Assignee: Realtek Semiconductor Corp.
    Inventors: Ka-Un Chan, Chin-Lung Li
  • Patent number: 8719616
    Abstract: A method for encoder frequency-shift compensation includes determining frequency values of an input encoder signal, determining repeatable frequency-shifts of the frequency values and generating a frequency-shift compensated clock using the repeatable frequency-shifts. A frequency-shift compensated clock includes a synthesizer configured to generate a frequency-shift compensated clock signal using repeatable frequency shifts and encoder clock signals.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: May 6, 2014
    Assignee: Seagate Technology LLC
    Inventors: Koichi Wago, Sundeep Chauhan, David M. Tung
  • Patent number: 8699617
    Abstract: According to an embodiment, a transmitter is described comprising an input configured to receive a plurality of symbols to be transmitted and a timing circuit configured to associate each symbol with a symbol transmission period of a predefined sequence of symbol transmission periods, wherein the symbol transmission periods of the sequence of symbol transmission periods are at least partially different.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: April 15, 2014
    Assignee: Infineon Technologies AG
    Inventor: Ljudmil Anastasov
  • Patent number: 8674812
    Abstract: In a communication system including a RFID tag, which has a function to record information and a function to carry out wireless communication with an external device and is capable of transmission with using both FM modulation and AM modulation, and a reader/writer for writing and reading information onto and from the RFID tag via wireless communication, a transmission to transmit information from the RFID tag to the reader/writer is carried out with using one of the FM modulation and the AM modulation at the RFID tag. If the reader/writer fails to decode a signal transmitted with using the one of the FM modulation and the AM modulation, transmission with respect to the information is carried out with using the other of the FM modulation and the AM modulation at the RFID tag. In this manner, reading error of data sent from the RFID tag is prevented.
    Type: Grant
    Filed: August 29, 2011
    Date of Patent: March 18, 2014
    Assignee: Riso Kagaku Corporation
    Inventor: Takahiro Fushimi
  • Patent number: 8675750
    Abstract: There are provided an apparatus and a method for reducing a peak to average power ratio (PAPR) through the recombination of an orthogonal frequency division multiplexing (OFDM) symbol. The apparatus includes an orthogonal frequency division multiplexing (OFDM) symbol transforming unit, a peak power measuring unit, and an OFDM symbol selecting unit, wherein the OFDM symbol transforming unit generates the plurality of OFDM symbols by (a) performing a process of rotating the OFDM symbol by a predetermined angle in a complex plane and performing cyclical shifting with respect to the rotated OFDM symbol and (b) repetitively performing process (a) with respect to the cyclically shifted OFDM symbol. Therefore, diversity is secured, whereby the PAPR may be reduced.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: March 18, 2014
    Assignees: Samsung Electro-Mechanics Co., Ltd., Korea University Industrial & Academic Collaboration Foundation
    Inventors: Joun Sup Park, Chul Gyun Park, Young Chai Ko, Seung Sik Eum
  • Publication number: 20140072077
    Abstract: According to embodiments of the present invention, a transmitter is provided. The transmitter includes a frequency shift keying (FSK) circuit, and a phase shift keying (PSK) circuit coupled in series to the FSK circuit, wherein the FSK circuit is configured, in a first mode of operation, to provide a FSK modulated signal to the PSK circuit, and, in a second mode of operation, to provide a fixed frequency signal to the PSK circuit, and wherein the PSK circuit is configured, in the first mode of operation, to transmit the FSK modulated signal, and, in the second mode of operation, to provide a PSK modulated signal based on the fixed frequency signal received from the FSK circuit.
    Type: Application
    Filed: September 9, 2013
    Publication date: March 13, 2014
    Inventors: San Jeow CHENG, Yuan GAO, Chun Huat HENG
  • Patent number: 8669826
    Abstract: A radio transmitter includes a signal processing circuit splitting a basic modulating signal into first and second modulating signals and outputting the first and second modulating signals. A PLL decides a fundamental wave. A VCO forms a portion of the PLL and modulates the fundamental wave decided by the PLL in accordance with a voltage of the first modulating signal outputted from the signal processing circuit. A PLL circuit forms a portion of the PLL and varies a frequency division ratio to modulate the fundamental wave decided by the PLL in accordance with the second modulating signal outputted from the signal processing circuit.
    Type: Grant
    Filed: September 12, 2011
    Date of Patent: March 11, 2014
    Assignee: Kabushiki Kaisha Kenwood
    Inventor: Hiroyuki Ishibashi
  • Patent number: 8660205
    Abstract: A method and apparatus employing statistical physics energy minimization methods to signal constellation design. By using statistical physics concepts, an energy-efficient signal constellation design algorithm (EE-SCDA) is described. In the presence of amplified spontaneous emission (ASE) noise and channel impairments, we use EE-SCDA to determine a source distribution, and represent the signal constellation design as a center of mass problem. Furthermore a discrete-time implementation of D-dimensional transceiver as well as corresponding EE polarization-division multiplexed (PDM) system is described.
    Type: Grant
    Filed: June 3, 2012
    Date of Patent: February 25, 2014
    Assignee: NEC Laboratories America, Inc.
    Inventors: Ivan B. Djordjevic, Lei Xu, Ting Wang
  • Patent number: 8649465
    Abstract: The invention relates to methods for adaptive clock reconstruction and decoding in audio frequency. The method includes the steps of: receiving a modulated signal, wherein the modulated signal is modulated by RC-FSK (Return to Carrier Frequency Shifting Keying); performing a spectrum analysis to the modulated signal to obtain a plurality of frequency envelopes; storing the frequency envelopes; searching the peak values of the frequency envelopes and the time points corresponding to the peak values to modify an estimated period; and generating a clock period for the RC-FSK demodulation and a clock phase for the RC-FSK demodulation according to the estimated period.
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: February 11, 2014
    Assignee: Generalplus Technology Inc.
    Inventor: Chia-Sheng Hsu
  • Publication number: 20130336425
    Abstract: To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a method for performing properizing frequency shift (p-FRESH) vectorizing, the method comprising: converting a scalar-valued input signal of length L into a 2L-by-1 vector-valued output signal including complex conjugate signal of the input signal; modulating the input signal and the complex conjugate signal each with L different carriers; and bandpass filtering the modulated signal to form the output signal, wherein the output signal is band-limited to a half-Nyquist zone (F+).
    Type: Application
    Filed: October 13, 2011
    Publication date: December 19, 2013
    Applicants: POSTECH ACADEMY-INDUSTRY FOUNDATION, LG ELECTRONICS INC.
    Inventors: Daewon Lee, Jeongho Yeo, Byungwook Han, Byounghoon Kim, Joonho Cho
  • Patent number: 8605773
    Abstract: A data communication apparatus using a radio frequency and a data processing method thereof are provided. A first communication apparatus frequency shift keying and phase shift keying modulates and transmits data from a service server to a radio frequency band. A second communication apparatus modulates, demodulates, and outputs the data. The data communication apparatus using a radio frequency, includes: a data modulation module frequency shift keying and phase shift keying modulates data to a radio frequency band to generate a modulated data signal; and a data transmission module transmitting the modulated data to another communication apparatus.
    Type: Grant
    Filed: November 24, 2010
    Date of Patent: December 10, 2013
    Assignee: Hyundai Motor Company
    Inventors: Yu Tae Choi, Young Seak Kim
  • Patent number: 8599861
    Abstract: The present disclosure teaches an active antenna array for a mobile communications network. The active antenna array comprises a base band unit, a plurality of transceiver units terminated by at least one antenna element; and at least one link. The link couples the individual ones of the plurality of transceiver units to the base band unit. The link is a digital link and is adapted to relay a payload signal at a selectable payload rate. The digital link is further adapted to relay a timing signal at a fixed timing rate, when the timing signal is embedded in the payload at a selectable payload rate. The present disclosure further teaches a method for relaying radio signals and a computer program for manufacturing the active antenna array and for executing the method.
    Type: Grant
    Filed: June 3, 2010
    Date of Patent: December 3, 2013
    Assignee: KATHREIN-Werke KG
    Inventors: Georg Schmidt, Johannes Schlee
  • Patent number: 8594237
    Abstract: A GFSK modulator comprises: a first compensation module, configured to receive a GFSK pulse signal, apply a first amplitude compensation and a first delay compensation to the GFSK pulse signal, so as to generate a first compensated control signal; a second compensation module, configured to receive the GFSK pulse signal, apply a second amplitude compensation and a second delay compensation to the GFSK pulse signal, so as to generate a second compensated control signal; a closed-loop PLL module including a closed-loop PLL, configured to receive and use the first and the second compensated control signals to generate a modulated signal.
    Type: Grant
    Filed: December 30, 2010
    Date of Patent: November 26, 2013
    Assignee: Beken Corporation
    Inventors: Yiming Huang, Ronghui Kong, Caogang Yu
  • Patent number: 8594138
    Abstract: Improvements are disclosed for in-band signaling, i.e., transmission of data in a voice channel of a digital wireless network during a voice call session. A family of narrow-band signaling methods, some employing tapered waveforms, is disclosed to successfully pass data-carrying signals through the low-bit rate modes of the EVRC-B vocoder commonly used in CDMA wireless channels. These features can be used in cell phones or other wireless communication devices, including automotive applications.
    Type: Grant
    Filed: July 18, 2011
    Date of Patent: November 26, 2013
    Assignee: Airbiquity Inc.
    Inventor: Michael Hirano
  • Publication number: 20130287125
    Abstract: A transmitter and receiver for performing a signal select algorithm are provided. A transmitter for providing a signal on a line to be located includes at least one direct digital synthesizer, the direct digital synthesizer producing two component frequencies in response to an input square wave signal; and a feedback loop providing the input square wave.
    Type: Application
    Filed: April 30, 2013
    Publication date: October 31, 2013
    Applicant: Vivax-Metrotech
    Inventors: Stephen John Petherick, George Mainescu, Ion Dracea, Razvan Gabriel Stefanoiu, John Mark Royle
  • Patent number: 8565348
    Abstract: The radio transmitting apparatus includes a first initial phase value setting circuit that sets, in the first modulator, an initial value of the phase of the first modulated signal, which is a value at the start of the modulation according to the first modulation scheme. The radio transmitting apparatus includes a second initial phase value setting circuit that sets, in the second modulator, the phase stored in the phase storing circuit as an initial value of the phase of the second modulated signal, which is a value at the start of the modulation according to the second modulation scheme. The radio transmitting apparatus includes a signal gathering circuit that selects and outputs the first modulated signal output from the first modulator and then selects and outputs the second modulated signal output from the second modulator.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: October 22, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Keiji Tsunoda, Hideaki Majima, Hiroyuki Fujiki
  • Patent number: 8532228
    Abstract: Carrier frequency offset (CFO) between a transmitter and receiver signaling at 2 Mbps data rate with a 11110000 pattern as the preamble period is corrected within one preamble time period using free-running coarse and fine carrier frequency offset estimations. Two estimates for the CFO are computed, coarse and fine. The fine one is computationally accurate but may not be correct because of a potential wrap at ±180° in the computation. The coarse one is not accurate but delivers the approximate CFO value without wrap over. The comparison between the coarse and fine estimates thus may be used to detect a wrap over in the fine estimate and modify the fine estimate accordingly. Thereafter the compensated fine CFO estimation is used for carrier frequency offset (CFO) compensation.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: September 10, 2013
    Assignee: Microchip Technology Incorporated
    Inventors: József G. Németh, Péter Szilveszter Kovács
  • Patent number: 8526539
    Abstract: A signal shaper generates an output signal representing a binary sequence, the output signal being the time-dependence of a signal value F. The signal shaper is input a first signal value F0 and a different second signal value F1, and receives a sequence of data bits. If the state of a first data bit and the state of a second data bit differ, the signal shaper controls the signal value F to change monotonically from the first signal value F0 or the second signal value F1 at a first point in time via one or more intermediate values at intermediate points in time to the second signal value F1 or the first signal value F0 at a later second point in time. On the time interval from the first point in time to the second point in time, the output signal may be a monotonic step function.
    Type: Grant
    Filed: August 26, 2008
    Date of Patent: September 3, 2013
    Assignee: Freescale Semiconductor, Inc.
    Inventor: Laurent Gauthier
  • Patent number: 8509320
    Abstract: A communication circuit is provided which transmits an information bit string from a transmission unit to a reception unit. The transmission unit includes a first modulation circuit that modulates a first carrier wave by a start bit to generate a first frequency signal, a second modulation circuit that modulates a second carrier wave by the information bit string to generate a second frequency signal, and a transmission circuit that transmits the first and second frequency signals from a transmitting antenna. The reception unit includes a reception circuit that receives a signal from the transmission unit, a first detector circuit that detects a signal of the first carrier wave to demodulate the start bit, a second detector circuit that detects a signal of the second carrier wave to demodulate the information bit string, and a detection circuit that is synchronized by the start bit and reads the information bit string.
    Type: Grant
    Filed: June 2, 2011
    Date of Patent: August 13, 2013
    Assignee: Toyota Boshoku Kabushiki Kaisha
    Inventors: Hideki Uno, Koji Yamada, Yuya Makino
  • Patent number: 8483311
    Abstract: An apparatus for providing a data encoding scheme may include an encoder. The encoder may be configured to determine, for a digital input value comprising a particular number of bits, whether more than half of the bits of the digital input value have a high value. The encoder may be further configured to encode the digital input value by inverting each of the bits of the digital input value in response to a determination that more than half of the bits of the digital input value have the high value. Corresponding method and computer program product, and a decoder and decoding method are also provided.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: July 9, 2013
    Assignee: Nokia Corporation
    Inventor: Jaakko Valtteri Varteva
  • Patent number: 8442136
    Abstract: A method of transmitting a control channel format indicator (CCFI), also known as PCFICH (Physical Control Format Indicator Channel), in case where the length of a coded CCFI is not an integer multiple of three, including mapping a plurality of two-bit CCFI into a codebook with each component codeword having three bits; generating a sequence of codewords selected from the codebook by repeating the selected component codeword for predetermined times; generating a codeword by concatenating the sequence of the selected component codewords with the original CCFI bits; and transmitting the codeword carrying information of CCFI. The method further includes a step of generating a permutation of each of the four codewords by assigning K repetitions of the three-bit component codeword to the number of K resource units respectively and mapping remaining K bits of each of the four codewords separately to the number of K resource units.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: May 14, 2013
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Jianzhong Zhang, Joonyoung Cho, Zhouyue Pi, Farooq Khan
  • Patent number: 8402303
    Abstract: The embodiments disclose a method for encoder frequency-shift compensation, including, determining frequency values of an input encoder signal, analyzing an encoder index clock signal and the input encoder signal to determine values of frequency-shifts and compensating for the values of the frequency-shifts to generate a frequency-shift compensated clock.
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: March 19, 2013
    Assignee: Seagate Technology LLC
    Inventors: Koichi Wago, Sundeep Chauhan, David M. Tung
  • Patent number: 8402332
    Abstract: Disclosed herein is a reception apparatus, including an acquisition section adapted to receive a signal which includes at least one of a first signal and a second signal which have different structures from each other except that the first and second signals have a preamble signal and acquire the preamble signal from the received signal; a detection section adapted to detect a value for correcting the signal using the signal; and a correction section adapted to correct, if it is decided based on the preamble signal acquired by the acquisition section that the signal is the first signal, the signal using the value detected by the detection section.
    Type: Grant
    Filed: October 7, 2010
    Date of Patent: March 19, 2013
    Assignee: Sony Corporation
    Inventors: Yuken Goto, Kenichi Kobayashi, Kentaro Nakahara