Pulse Width And Pulse Position Modulation Patents (Class 370/205)
  • Patent number: 10291359
    Abstract: Certain aspects of the present disclosure relate to techniques and apparatus for design of hybrid automatic repeat request (HARQ) feedback bits. The method generally includes obtaining a payload to be transmitted, partitioning the payload into a plurality of blocks, and partitioning each block of the plurality of blocks into a plurality of sections. The method also includes deriving redundancy check information for each section of the plurality of sections, and generating a plurality of codewords, each comprising a block of the plurality of blocks and the redundancy check information for each section of the block, wherein a location of each of the sections in the codewords is determined based on an error rate corresponding to each of the sections.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: May 14, 2019
    Assignee: Qualcomm Incorporated
    Inventors: Changlong Xu, Jian Li, Chao Wei, Jilei Hou
  • Patent number: 9960853
    Abstract: A system and method using Differential Pulse Position Modulation (DPPM) to encode digital data so that it can be transmitted using an infrared (IR) link. The digital data is then decoded upon receipt. This invention can be implemented in software and run on an FPGA (or the like) for prototyping and integration with existing designs. The encoding, decoding and sensitive timing are handled by dedicated hardware, which greatly increases the speed of these processes because it frees up the processor to accomplish other tasks.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: May 1, 2018
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: Daniel Collins, Glenn Shevach, Mark Blair
  • Patent number: 9948387
    Abstract: The present disclosure provides dynamic performance monitoring systems and methods for optical networks to ascertain optical network health in a flexible and accurate manner. The present invention introduces accurate estimations for optical channel performance characteristics based either on existing channels or with a dynamic optical probe configured to measure characteristics on unequipped wavelengths. Advantageously, the dynamic performance monitoring systems and methods introduce the ability to determine physical layer viability in addition to logical layer viability.
    Type: Grant
    Filed: October 10, 2016
    Date of Patent: April 17, 2018
    Assignee: Ciena Corporation
    Inventors: Michael Y. Frankel, Loudon T. Blair, Christian Bourget, Lyndon Y. Ong, David Weldon Boertjes, Jamie Gaudette
  • Patent number: 9591620
    Abstract: A method permits a UE receiver to detect and report to the network a scrambling code collision (i.e., two neighbor cells transmitting with the same scrambling code while timing is aligned). The UE receiver decodes the PCCPCH's physical channel with all the associated broadcast information while a scrambling code collision at the UE is present. The UE reports SFN-SFN information to the network, to insure the UE mobility and then prepare the handover to a new detected cell. This process and a respective apparatus are usable in the presence of MIMO and further improve the detection of the scrambling code collision in the presence of MIMO.
    Type: Grant
    Filed: June 21, 2013
    Date of Patent: March 7, 2017
    Assignee: OPTIS CIRCUIT TECHNOLOGY, LLC
    Inventors: Fabrizio Tomatis, Andrea Ancora
  • Patent number: 9537533
    Abstract: Embodiments of the invention provide a method for discriminating between two types of encoding schemes for the frame control header (FCH) used in G3-type narrow band OFDM communications. The two modes for encoding are Differential with respect to the previous Symbol (DS) and Differential with respect to the Preamble (DP). This mode is sometimes referred to as “coherent” mode.
    Type: Grant
    Filed: October 17, 2013
    Date of Patent: January 3, 2017
    Assignee: Texas Instruments Incorporated
    Inventors: Anuj Batra, Tarkesh Pande, Il Han Kim
  • Patent number: 9490938
    Abstract: Systems and methods are provided for performing iterative interference cancellation. The systems and methods include receiving a plurality of codewords and processing the plurality of codewords using a channel decoder to obtain a decoder output. The systems and methods further include determining, based on the decoder output, whether a stopping criterion is satisfied, and cancelling interference from the plurality of codewords based on the decoder output in response to determining that the stopping criterion is not satisfied.
    Type: Grant
    Filed: January 6, 2015
    Date of Patent: November 8, 2016
    Assignee: Marvell International Ltd.
    Inventors: Mingguang Xu, Yakun Sun, Hui-Ling Lou
  • Patent number: 9479376
    Abstract: A modulator generates a modulation signal from an input signal by, and a serial-parallel converter generates a subcarrier modulation signal from the modulation signal. A shifter shifts a predetermined data series to generate a shift sequence. Two IFFT units perform an IFFT on data sent thereto to generate first data and second data. An operator generates baseband signals from at least one of the sum of the first data and the second data and the difference therebetween. The foregoing processing is repeated with a predetermined number of times to shift the predetermined data series being changed. A PAPR determiner sends the baseband signal matching with a predetermined reference for determining a transmission signal to a transmitter. The transmitter generates a transmission signal from the baseband signal, and transmits the transmission signal to another communication apparatus via an antenna.
    Type: Grant
    Filed: July 30, 2012
    Date of Patent: October 25, 2016
    Assignee: ICOM INCORPORATED
    Inventor: Nobuyoshi Nishikawa
  • Patent number: 8891355
    Abstract: A communication device is provided for transmitting information incorporated into at least one message packet. The device includes components for encoding the message packet as a signal, which is afterwards transmitted and analyzed. The encoder assigns the message packet to correspond to a specific pulse width. The transmitter sends the signal across a channel. The processor parses the signal as corresponding to the specific pulse width subsequently decoded to obtain the message packet.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: November 18, 2014
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: William M. Huttle
  • Patent number: 8873686
    Abstract: A system including a first receiver that generates a first set of decoded codewords; and a first canceller that cancels, in response to any decoded codeword of the first set of decoded codewords failing CRC and a first decoded codeword from the first set of decoded codewords passing CRC, interference of a first codeword on a second set of codewords which includes the plurality of codewords and excludes the first codeword. The system further includes a second receiver that generates a third set of decoded codewords by decoding the second set of codewords; and a second canceller that cancels, in response to any decoded codeword of the third set of decoded codewords failing CRC and a second decoded codeword from the third set of decoded codewords passing CRC, interference of a second codeword on a fourth set of codewords.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: October 28, 2014
    Assignee: Marvell International Ltd.
    Inventors: Jungwon Lee, Yakun Sun, Jiwoong Choi, Leilei Song, Adina Matache
  • Patent number: 8873616
    Abstract: A pulse width modulator has a first clock source providing a clock signal to a set input of an output controller configured to set a pulse width output signal and having a reset input to reset the pulse width output signal. A duty cycle control unit is coupled with the reset input of the output controller, wherein the duty cycle control unit has a numerical controlled oscillator (NCO) being coupled with a register and configured to provide for a direct digital synthesis to produce a specified frequency according to a value set in the register. Furthermore, logic is provided for receiving a signal from a second clock source and the pulse width output signal to trigger the numerical controlled oscillator.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: October 28, 2014
    Assignee: Microchip Technology Incorporated
    Inventors: Michael Garbutt, Jacobus Albertus van Eeden, David Martin
  • Patent number: 8861584
    Abstract: A noise discriminator circuit and a noise discrimination method in a burst mode receiver is configured to determine the validity of an incoming burst signal by analyzing the timing of the signal edges of incoming signal to look for a time duration conforming to the preamble data bits of a valid burst signal. In one embodiment, the noise discriminator circuit and method analyze the time duration between signal edges of the same pulse of an incoming signal. In another embodiment, the noise discriminator circuit and method analyze the time duration between a first set of pulses of an incoming signal and the time duration between signal edges of a second set of pulses of the incoming signal. When the time durations are within a given time range relating to a predetermined timing separation of a valid burst signal, the incoming signal is validated as a valid burst signal.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: October 14, 2014
    Assignee: Micrel, Inc.
    Inventors: George W. Brown, Thomas S. Wong, Bernd Neumann
  • Patent number: 8854946
    Abstract: A method and an apparatus for generating a standard cancellation signal includes: setting weight values according to frequency points of a current cell and its neighboring cells; according to the frequency points of the current cell and neighboring cells and the weight values of the frequency points, performing Fourier transform to obtain a corresponding time-domain signal; and performing highest amplitude normalization on the time-domain signal and performing a cyclic shift to obtain a standard cancellation signal. The embodiments generate a standard cancellation signal according to frequency points of the current cell and its neighboring cells, so that the current cell and its neighboring cells share the peak clipping noise, and therefore helping improve the peak clipping performance of the current cell or reduce the EVM distortion.
    Type: Grant
    Filed: October 16, 2012
    Date of Patent: October 7, 2014
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yong Jiang, Yi Wang
  • Patent number: 8817589
    Abstract: Methods and apparatus for line coding in a communications network are described. According to one embodiment of the invention, downstream communications traffic bits are received and mapped into downstream bit positions of a transmission structure. A pre-selected bit in each upstream bit positions of the transmission structure is provided to form a downstream transmission structure. A downstream optical signal carrying the downstream transmission structure is generated for transmission. Upstream communications traffic bits are also received and mapped into the upstream bit positions of the transmission structure to form an upstream transmission structure. An upstream optical signal carrying the upstream transmission structure is generated for transmission.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: August 26, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Fabio Cavaliere, Stefan Dahlfort, Luca Giorgi
  • Patent number: 8811143
    Abstract: A digital processing unit for use in a spread spectrum signal receiver, the digital processing unit being adapted to receive an incoming stream of data samples and in response thereto produce a decoded signal, the digital processing unit comprising a correlation module adapted to correlate data blocks formed from the incoming stream of data samples with a local code replica segment to produce a first number of intermediate accumulation results and an aggregation module adapted to receive the first number of intermediate accumulation results and to combine the first number of consecutive ones of said intermediate accumulation results to form a target number of aggregated accumulation results, said target number being less than or equal to the first number.
    Type: Grant
    Filed: November 3, 2010
    Date of Patent: August 19, 2014
    Assignee: NordNav Technologies AB
    Inventors: Christian Stahlberg, Per-Ludvig Normark
  • Patent number: 8804483
    Abstract: A method of transmitting and receiving data frames using pulses is disclosed. According to the transmitting method, a first signal is transmitted including one or more bursts of pulses during a first portion of a transmission frame, and not transmitting the first signal during a second portion of the transmission frame. The not transmitting the first signal may include maintaining one or more silence periods for the second portion of the transmission frame, or transmitting a second signal distinct from the first signal. According to the receiving method, a signal including one or more bursts of pulses is received during a first portion of a transmission frame, an analysis of the one or more bursts of pulses is performed, and the transmission frame is detected based on the analysis of the one or more bursts of pulses.
    Type: Grant
    Filed: February 8, 2010
    Date of Patent: August 12, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Jun Shi, David Jonathan Julian, Amal Ekbal
  • Patent number: 8774317
    Abstract: A system and method for a radio controlled clock receiver adapted to extract timing and time information from a phase modulated signal. The official time signal is broadcast from a central location using a modified modulation scheme, which adds phase modulation over the legacy amplitude modulation, such as the legacy WWVB pulse width modulated (PWM)/amplitude shift keying (ASK) modulation, thereby allowing for improved performance. The information modulated onto the phase contains a known synchronization sequence having good autocorrelation properties, error-correcting coding for the time information and notifications of daylight-saving-time (DST) transitions that are provided months in advance. The modulation scheme is based on a form of phase modulation, such as binary-phase-shift-keying (BPSK) or phase reversal keying (PRK).
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: July 8, 2014
    Assignee: Everset Technologies, Inc.
    Inventor: Oren E. Eliezer
  • Patent number: 8731120
    Abstract: A method and apparatus is provided for reducing interference in a communication system. A feedback-controlled biased inverting limiter is used to reduce interference power by trapping the interfering signal, while passing the wanted signal through to the output. The amplitude trap triples the frequency of a signal component of a particular amplitude, thus shifting it out of the communication band and into the stopband of the receiver or transponder filter. The feedback-controlled biased inverting limiter uses a hard limiter, window comparator, feedback loop, and an exclusive NOR gate to trap the interfering signal, while allowing the wanted signal to pass through to a receiver.
    Type: Grant
    Filed: April 7, 2012
    Date of Patent: May 20, 2014
    Inventor: Cameron M. Pike
  • Patent number: 8693578
    Abstract: A transmission device includes a pulse modulated signal generator that generates a pulse-modulated signal by changing the width of a pulse or the density of a pulse according to the magnitude of the amplitude component of an input signal while discretely changing the pulse height according to the magnitude of the amplitude, a modulated-signal generator that generates a modulated signal by integrating the pulse-modulated signal and the phase component of the input signal, a power amplifier that includes at least as many amplifiers as the number of the discrete amplitude levels of the modulated signal, changes the number of amplifies that amplify the modulated signal on the basis of the value of the amplitude level of the modulated signal, combines outputs of the amplifiers, and outputs a combined output, and an output filter that eliminates a square-wave component from the output of the power amplifier.
    Type: Grant
    Filed: December 1, 2010
    Date of Patent: April 8, 2014
    Assignee: NEC Corporation
    Inventors: Kazuaki Kunihiro, Shinichi Hori, Kazumi Shiikuma
  • Patent number: 8687751
    Abstract: A system including a first receiver module and a first interference canceller module. The first receiver module generates a first set of decoded codewords by decoding codewords in a received signal and determines if any of the first set of decoded codewords fails cyclic redundancy check (CRC). The first interference canceller module generates a second signal based on a first decoded codeword from the first set of decoded codewords when (i) any of the first set of decoded codewords fails CRC and (ii) the first decoded codeword passes CRC. By subtracting the second signal from the first signal, the first interference canceller module (i) cancels interference of a first codeword, which corresponds to the first decoded codeword, on a second set of codewords, which includes the plurality of codewords and excludes the first codeword and (ii) generates a third signal, which includes the second set of codewords.
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: April 1, 2014
    Assignee: Marvell International Ltd.
    Inventors: Jungwon Lee, Yakun Sun, Jiwoong Choi, Leilie Song, Adina Matache
  • Patent number: 8625661
    Abstract: Systems and methods for the pulse edge modulation of digital carrier signals for communications systems. A digital carrier signal is generated and the carrier is pulse edge modulated with digital data. A pulse edge modulated signal is generated by either retarding or advancing each pulse edge of a carrier to be modulated relative to its original position in time, depending on the state of the digital bit to be modulated on that edge.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: January 7, 2014
    Assignee: Alfred E. Mann Foundation for Scientific Research
    Inventors: Edward K. F. Lee, Eusebiu Matei
  • Patent number: 8570983
    Abstract: Systems and methods for full duplex communications on a wireless link between two transceiver devices are disclosed. A first portion of outbound data is transmitted from one transceiver device to the other transceiver device on a first channel, while a first portion of inbound data from the other transceiver device is received on a second channel and the presence of a radiating source other than the inbound data is detected. A second portion of the outbound data is transmitted from the transceiver device to the other transceiver device on the second channel, while a second portion of the inbound data is received from the other of the two transceiver devices on the first channel and the presence of a radiating source other than the inbound data is detected.
    Type: Grant
    Filed: May 2, 2007
    Date of Patent: October 29, 2013
    Assignee: Nextivity, Inc.
    Inventor: Behzad Mohebbi
  • Patent number: 8520495
    Abstract: A broadcasting signal transmitting device transmits a broadcasting signal including a base layer signal and an enhancement layer signal as well as an additional layer signal relating to the broadcasting signal to a broadcasting signal receiving device. The broadcasting signal receiving device selectively provides the enhancement layer signal and the additional layer signal to the user according to the user's service level. Accordingly, various services are differently provided to the user according to the user level.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: August 27, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Byungjun Bae, Yun Jeong Song, Jong Soo Lim, Joungil Yun, Kwang-Yong Kim, Kyu Tae Yang, Soo In Lee
  • Patent number: 8461792
    Abstract: A pulse width modulation (PWM) fan controller includes a sensor, a generator, a selector, and a multiplexer. The sensor is configured for sensing a current temperature of an electronic device. The generator is configured for generating different PWM signals, each of which is suitable for regulating the rotational speed of a fan for dissipating heat for the electronic device of a corresponding temperature. The selector is configured for generating a selection control signal based upon the current temperature of the electronic device. The selection control signal is used for selecting a PWM signal corresponding to the current temperature of the electronic device from the PWM signals from the generator. The multiplexer is configured for performing the selection of the PWM signal.
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: June 11, 2013
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventors: Chien-Jen Huang, Hsien-Chang Chiu
  • Patent number: 8462866
    Abstract: A method of transmitting data symbols via an Orthogonal Frequency Division Multiplexed (OFDM) symbols that includes forming data symbols into pairs and generating a first pair of modulation symbols for each of the pairs of data symbols, where the first pair of modulation symbols form first and second modulation symbols of an Alamouti cell. The method further includes forming a first version of the OFDM symbols by modulating the sub-carriers allocated for carrying the data with the first and second modulation symbols of the Alamouti cells, and modulating the one or more pilot carriers of the first version of the OFDM symbol according to a predetermined pattern.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: June 11, 2013
    Assignee: Sony Corporation
    Inventors: Lothar Stadelmeier, Dietmar Schill, Daniel Schneider
  • Patent number: 8437423
    Abstract: A transmission device including a pulse generating section configured to generate a plurality of pulses using a signal of data and a signal obtained by delaying the signal of data, and to adjust the pulse width such that each of the plurality of pulses has a pulse width conforming to a sequence of the data; a band-pass filter filtering the plurality of pulses; and a transmission amplifier amplifying the filtered plurality of pulses and outputting the filtered plurality of pulses as a transmission signal.
    Type: Grant
    Filed: October 12, 2009
    Date of Patent: May 7, 2013
    Assignee: Fujitsu Limited
    Inventor: Yasuhiro Nakasha
  • Patent number: 8422478
    Abstract: To obtain maximum throughput in accordance with characteristics of a propagation path, a radio transmission device having a plurality of transmitting antennas (18a, 18b) for transmitting a transmission signal in units of sub-carriers by performing spatial multiplexing or without performing spatial multiplexing is provided that includes a sub-carrier modulation part 11 modulating the input transmission signal for each sub-carrier, a transmission signal allocation part 13 allocating the transmission signal modulated for each of the sub-carriers to each of the transmitting antennas, and a transmission control part 12 that determines a multiplexing number for performing spatial multiplexing for each sub-carrier based on information received from another radio communication device as an opposite party, and outputs the determined multiplexing number to the sub-carrier modulation part and the transmission signal allocation part.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: April 16, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Naoki Okamoto
  • Patent number: 8416757
    Abstract: To obtain maximum throughput in accordance with characteristics of a propagation path, a radio transmission device having a plurality of transmitting antennas (18a, 18b) for transmitting a transmission signal in units of sub-carriers by performing spatial multiplexing or without performing spatial multiplexing is provided that includes a sub-carrier modulation part 11 modulating the input transmission signal for each sub-carrier, a transmission signal allocation part 13 allocating the transmission signal modulated for each of the sub-carriers to each of the transmitting antennas, and a transmission control part 12 that determines a multiplexing number for performing spatial multiplexing for each sub-carrier based on information received from another radio communication device as an opposite party, and outputs the determined multiplexing number to the sub-carrier modulation part and the transmission signal allocation part.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: April 9, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Naoki Okamoto
  • Patent number: 8358219
    Abstract: An indicator apparatus, having a pulse width modulation circuit (1), a demultiplexer (2) which has at least one signal input (21) and at least two signal outputs (22), wherein the signal input (21) is connected to the pulse width modulation circuit (1), and at least two light-emitting diodes (3) which are each connected to a signal output (22) of the demultiplexer.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: January 22, 2013
    Assignee: e: cue control GmbH
    Inventor: Dominik Heggen
  • Patent number: 8351483
    Abstract: Provided are transmitter topology, receiver topology and methods for generating and transmitting a radio signal at a transmitter and detecting and processing a radio signal at a receiver. The radio signals are transmitted across a wireless interface using Ultra Wideband (UWB) pulses. A transmitted reference approach is utilized. The radio signal include pairs of UWB pulses with each pair of pulses separated by a fixed time delay. The two pulses are then combined to provide for improved noise immunity.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: January 8, 2013
    Assignee: University of South Florida
    Inventor: James L. Tucker
  • Patent number: 8325589
    Abstract: A method and apparatus are described for performing a handover in a content delivery system, including performing the handover from a first network to a second network at a protocol layer determined based on whether a content stream identification file used by said first network is paired with a content stream identification file used by said second network. Also described are a method and apparatus for performing a handover in a content delivery system, including performing the handover from a first network to a second network at a protocol layer determined based on whether a same content stream identification file used by the first network is used by the second network. Further described are a method and apparatus for performing a handover in a content delivery system, including performing the handover from a first network to a second network at one of an application layer, a network layer and a media access control layer.
    Type: Grant
    Filed: September 16, 2008
    Date of Patent: December 4, 2012
    Assignee: Thomson Licensing
    Inventors: Jun Li, Kai Xie, Yun Tao Shi, Si Nan Shangguan
  • Patent number: 8315302
    Abstract: A modulator using a polynomial interpolator is described herein. In a simple circuit implementation of the modulator, coefficients of a representative polynomial are generated with interpolation filters in the polynomial interpolator. Crossing points may be identified for each sampling period by incorporating a virtual carrier waveform with the representative polynomial to generate a switching output control. Among other applications, the described modulator may be used in a Class-D amplifier. The described implementations may further confer benefits such as micro-power low voltage operation, low sampling rate, and low harmonic distortion.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: November 20, 2012
    Assignee: Infineon Technologies AG
    Inventor: Michael Lewis
  • Patent number: 8306106
    Abstract: An improved method for generating pulse width modulated signals, e.g., for use in audio amplifiers, power amplifiers, etc. An input digital value is received and divided by a number N, producing a quotient and a residue. A plurality N of edge modulation values may then be generated based on the quotient and the residue. Each of the N edge modulation values specifies an edge of the pulse width modulated signal to be generated. Generation of the N edge modulation values may comprise applying the residue to one or more of the N edge modulation values when the residue is greater than zero. The residue may be applied to different ones of the plurality N of edge modulation values during different iterations of the method in a non-stationary fashion. The pulse width modulated signal may then be generated based on the N edge modulation values.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: November 6, 2012
    Assignee: Equiphon, Inc.
    Inventors: Mark Andrew Alexander, Douglas Edward Heineman
  • Patent number: 8295375
    Abstract: A method of transmitting data symbols via Orthogonal Frequency Division Multiplexed (OFDM) symbols, that includes forming data symbols into pairs, generating a first pair of modulation symbols for each of the pairs of data symbols, forming a first version of the OFDM symbols by modulating the sub-carriers allocated for carrying the data with the first and second modulation symbols, and modulating the one or more pilot carriers of the first version of the OFDM symbol. The method also includes generating a second pair of modulation symbols for each of the pairs of data symbols, forming a second version of the OFDM symbol by modulating the sub-carriers allocated for carrying the data with the third and fourth modulation symbols, modulating the one or more pilot carriers of the second version of the OFDM symbols and transmitting the first version of the OFDM symbol, and the second version of the OFDM symbol.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: October 23, 2012
    Assignee: Sony Corporation
    Inventors: Lothar Stadelmeier, Dietmar Schill, Daniel Schneider
  • Patent number: 8279742
    Abstract: A transmitter transmits data to a communicating opponent with a better channel condition with use of one or more frequency blocks including one or more carrier frequencies. The transmitter includes a communicating opponent selection unit evaluating the channel condition for each frequency block for each of plural communicating opponents and selecting one or more communicating opponents from the plurality of communicating opponents, a modulation scheme determination unit determining at least a modulation scheme depending on the evaluated channel condition, a control channel generation unit generating a control channel indicative of the determined modulation scheme and one or more frequency blocks available for the selected communicating opponents to receive a data channel, and a channel transmission unit providing the selected communicating opponents with the control channel and the data channel modulated in accordance with the modulation scheme.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: October 2, 2012
    Assignee: NTT DoCoMo, Inc.
    Inventors: Yoshihisa Kishiyama, Nobuhiko Miki, Kenichi Higuchi, Motohiro Tanno, Hiroyuki Atarashi, Mamoru Sawahashi
  • Patent number: 8274879
    Abstract: A transmitter transmits data to a communicating opponent with a better channel condition with use of one or more frequency blocks including one or more carrier frequencies. The transmitter includes a communicating opponent selection unit evaluating the channel condition for each frequency block for each of plural communicating opponents and selecting one or more communicating opponents from the plurality of communicating opponents, a modulation scheme determination unit determining at least a modulation scheme depending on the evaluated channel condition, a control channel generation unit generating a control channel indicative of the determined modulation scheme and one or more frequency blocks available for the selected communicating opponents to receive a data channel, and a channel transmission unit providing the selected communicating opponents with the control channel and the data channel modulated in accordance with the modulation scheme.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: September 25, 2012
    Assignee: NTT DoCoMo, Inc.
    Inventors: Yoshihisa Kishiyama, Nobuhiko Miki, Kenichi Higuchi, Motohiro Tanno, Hiroyuki Atarashi, Mamoru Sawahashi
  • Patent number: 8254437
    Abstract: A transmitting apparatus, receiving apparatus and communication system are disclosed, and great improvement in an S/N ratio, preventing an actual throughput from decreasing, and preventing the number of circuits for synchronizing spread spectrum signals from increasing can be expected at the receiving apparatus side. The transmitting apparatus includes a pulse generating circuit, pulse repetition cycle determining circuit, peak power determining circuit, and modulator. The pulse generating circuit generates pulse strings, pulse repetition cycle determining circuit determines, based on a clock signal, a pulse repetition cycle of the pulse string generated by the pulse generating circuit. The peak power determining circuit determines a pulse peak power of the pulse string. The modulator modulates the pulse string with transmission data, and then generates a transmission signal.
    Type: Grant
    Filed: March 9, 2006
    Date of Patent: August 28, 2012
    Assignee: Panasonic Corporation
    Inventors: Suguru Fujita, Masahiro Mimura, Kazuaki Takahashi, Yoshinori Kunieda, Noriyuki Ueki
  • Patent number: 8208363
    Abstract: A transmitter transmits data to a communicating opponent with a better channel condition with use of one or more frequency blocks including one or more carrier frequencies. The transmitter includes a communicating opponent selection unit evaluating the channel condition for each frequency block for each of plural communicating opponents and selecting one or more communicating opponents from the plurality of communicating opponents, a modulation scheme determination unit determining at least a modulation scheme depending on the evaluated channel condition, a control channel generation unit generating a control channel indicative of the determined modulation scheme and one or more frequency blocks available for the selected communicating opponents to receive a data channel, and a channel transmission unit providing the selected communicating opponents with the control channel and the data channel modulated in accordance with the modulation scheme.
    Type: Grant
    Filed: March 20, 2006
    Date of Patent: June 26, 2012
    Assignee: NTT DoCoMo, Inc.
    Inventors: Yoshihisa Kishiyama, Nobuhiko Miki, Kenichi Higuchi, Motohiro Tanno, Hiroyuki Atarashi, Mamoru Sawahashi
  • Patent number: 8190211
    Abstract: The present invention provides a plurality of embodiments for beamforming in an asymmetrical system wireless communication system (400) of NT (102i) transmit antennae and NR (104j) receive antennae where NT>NR that ensure the transmit power on each antenna is the same, without appreciable loss in performance. Additionally, a technique is provided for choosing fewer beamforming vectors than frequency bins in an OFDM system.
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: May 29, 2012
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Monisha Ghosh
  • Patent number: 8150325
    Abstract: An exemplary signal interference control system is disclosed that utilizes a computer system, such as programmable logic circuits or computer controlled logic gates, to generate blanking or control signals for various types of radio frequency receiver and transmitter combinations. Control signals are generated based on signal characteristic information stored in a memory including a delay following receipt of a pre-trigger signal from a radio frequency transmitter and a pulse width of control signal(s) generated for specified receivers, frequencies or systems. In one embodiment, information can be retrieved from a memory and used to generate an interference control signal. One or more control signals can be routed to a related or associated receiver to reduce or eliminate interference effects.
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: April 3, 2012
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Brad A. Prichard
  • Patent number: 8135554
    Abstract: Transmission of probe configuration data is initiated upon recognition by the probe of a prescribed condition. Probe configuration data protocol includes a data frame, subdivided into a desired number of time slots. Unlike measurement data protocol, where inter-pulse pair timing within a slot varies based on a magnet position or temperature sensor resistance, configuration data protocol in accordance with the invention uses fixed inter-pulse timing to represent the various states of digital data. In such manner, at least a portion of the time slots making up the particular data frame can be used for containing data sent from the probe, and which can then be interpreted by the receiving processing device as at least one bit of binary code allocated to each individual slot of the portion of time slots.
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: March 13, 2012
    Inventor: Jonathan A. Levy
  • Patent number: 8130948
    Abstract: A method and system enables the selective addressing of groups of broadcast receivers within part of a satellite footprint. It uses two satellites having a common transmission band to transmit respective signals, and at receivers in the footprint the phases of the signals received from the two satellites are compared. This phase difference is dependent upon receiver location, but by measuring phase difference no absolute timing or phase measurement is required. A common key is generated at the receivers in a certain area. The output of selected receivers is fed back to the broadcast control centre and is used to encode the location-based services for that area. Preferably the operation is conducted on multiple frequencies and in multiple rounds of such frequencies. A multibit keyword can be directly generated at the receivers by use of a discrete Fourier transform (DFT) and combining its outputs for different rounds.
    Type: Grant
    Filed: August 3, 2006
    Date of Patent: March 6, 2012
    Assignee: British Broadcasting Corporation
    Inventor: Nigel Christopher Earnshaw
  • Patent number: 8121018
    Abstract: A signal transmitting method, a signal receiving method, and a signal receiving device are adapted to an OFDM system. In the signal transmitting method and signal receiving method, double asymmetric training symbols are used for performing time-varying channel response estimation. In the transmitting method, asymmetric pilot sub-carriers are added in data sub-carriers to form a plurality of first and second training symbols. The pilot symbols in the first and second training symbols are asymmetrically configured. In the receiving method, a channel response corresponding to each pilot sub-carrier is estimated by using two adjacent asymmetric pilot symbols. The received data sub-carrier is then restored through the channel response. Through the signal transmitting method and signal receiving method, even in a transmitter or a receiver moving at a high speed, more bandwidths can be used to transfer data, and contents of the transferred data can be correctly estimated.
    Type: Grant
    Filed: September 4, 2009
    Date of Patent: February 21, 2012
    Assignees: Industrial Technology Research Institute, National Chi Nan University
    Inventors: Chao-Wei Chen, Shyue-Win Wei, Hsin-An Hou, Harmoko Habibi Roni
  • Patent number: 8116389
    Abstract: A control unit generates packet signals to be transmitted. The control unit uses either a first packet format, where a second known signal defined by a second radio communication system different from a first radio communication system is assigned anterior to a first known signal defined by the first radio communication system, or a second packet format, where the first known signal is assigned in an anterior part. Subcarriers to be used in the first known signal contain subcarriers to be used in the second known signal, and the first known signal and the second known signal are defined by different values.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: February 14, 2012
    Assignee: Sanyo Electric Co., Ltd.
    Inventor: Seigo Nakao
  • Patent number: 8081707
    Abstract: A system and method of carrier less modulation is described in this disclosure that uses SAW filters as a modulator in addition to their conventional use as filters for band limiting an UWB system. This system and method is primarily designed to be used with any integer cycle, ultra-wide band or impulse type modulation and more particularly is designed to work with a method of modulation named xMax. This technique exploits the impulse response of the SAW filter producing a carrier less impulse radio system with limited bandwidth, low average power, but high peak power.
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: December 20, 2011
    Assignee: XG Technology, Inc.
    Inventors: Joseph A. Bobier, Nadeem A. Khan
  • Patent number: 8072873
    Abstract: A process is described to build physical layer frames with a modcode adapted to the signal quality of a destination terminal. Data packets assigned to the same modcode may be sent in the same frame, although packets associated with higher modcodes may be used to complete a frame before switching to the applicable higher modcode for construction of subsequent frames. After an interval, the order of progression is restarted with an out of order packet above a threshold age. Flow control filtering mechanisms and a variable reliability margin may be used to adapt dynamically to the current data traffic conditions.
    Type: Grant
    Filed: January 20, 2010
    Date of Patent: December 6, 2011
    Assignee: ViaSat, Inc.
    Inventor: William H. Thesling
  • Patent number: 8014436
    Abstract: A transmitter and a method are described herein that can generate a radio signal with a reduced ratio of peak amplitude to root-mean-square amplitude which helps to improve the transmit efficiency of the transmitter's power amplifier. In addition, a receiver is also described herein that can decode the radio signal.
    Type: Grant
    Filed: July 2, 2008
    Date of Patent: September 6, 2011
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventor: Paul Dent
  • Patent number: 8000401
    Abstract: A phase-shift based pre-coding scheme used in a transmitting side and a receiving side that has less complexity than those of a space-time coding scheme, that can support various spatial multiplexing rates while maintaining the advantages of the phase-shift diversity scheme, that has less channel sensitivity than that of the pre-coding scheme, and that only requires a low capacity codebook is provided.
    Type: Grant
    Filed: September 4, 2009
    Date of Patent: August 16, 2011
    Assignee: LG Electronics Inc.
    Inventors: Moon-Il Lee, Bin-Chul Ihm, Jin-Young Chun, Jae-Won Chang, Jin-Hyuk Jung
  • Patent number: 7978592
    Abstract: Disclosed are multiple embodiments of method and apparatus to facilitate Multiple Users Reusing One Timeslot (MUROS) operation in wireless communications. A pair of wireless transmit/receive units (WTRUs) may be multiplexed onto a timeslot using a same pulse format. A WTRU may communicate on a network using MUROS technology both on the downlink (DL) and the uplink (UL), and may use a first pulse format on the DL and a second different pulse format on the UL. Pulse format support information to facilitate MUROS operation may be communicated between a network and a WTRU. The support information may be communicated in Radio Resource Control (RRC) messages. A network may allow for concurrent operation of WTRUs using different types of MUROS technology. For example, a network may include WTRUs using MUROS based on orthogonal sub-channels (OSC) while other WTRUs use MUROS based on an interference-canceling technology such as Downlink Advanced Receiver Performance (DARP) Phase I or Phase II.
    Type: Grant
    Filed: December 5, 2008
    Date of Patent: July 12, 2011
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Behrouz Aghili, Marian Rudolf
  • Publication number: 20110149716
    Abstract: Methods of transmitting an receiving symbols by a Mobile Subscriber Station (MSS) and a Base Station (BS) are provided. The method for receiving symbols by the MSS includes receiving symbols from the BS, wherein the symbols are mapped onto data sub-carriers using a sequence, wherein the sequence includes result values, the result values being generated by applying, to a basic sequence, an offset and a number of cyclic shifting, the basic sequence having a length identical to the number of data sub-carriers. The method for transmitting symbols by the MSS includes transmitting symbols to the BS, wherein the symbols are mapped onto data sub-carriers using a sequence, wherein the sequence includes result values, the result values being generated by applying, to a basic sequence, an offset and a number of cyclic shifting, the basic sequence having a length identical to the number of data sub-carriers.
    Type: Application
    Filed: February 25, 2011
    Publication date: June 23, 2011
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Jae-Hee CHO, Jae-Ho Jeon, Soon-Young Yoon, Sang-Hoon Sung, Ji-Ho Jang, In-Seok Hwang, Hoon Huh, Jeong-Heon Kim, Soung-Joo Maeng
  • Patent number: 7948960
    Abstract: To obtain maximum throughput in accordance with characteristics of a propagation path, a radio transmission device having a plurality of transmitting antennas (18a, 18b) for transmitting a transmission signal in units of sub-carriers by performing spatial multiplexing or without performing spatial multiplexing is provided that includes a sub-carrier modulation part 11 modulating the input transmission signal for each sub-carrier, a transmission signal allocation part 13 allocating the transmission signal modulated for each of the sub-carriers to each of the transmitting antennas, and a transmission control part 12 that determines a multiplexing number for performing spatial multiplexing for each sub-carrier based on information received from another radio communication device as an opposite party, and outputs the determined multiplexing number to the sub-carrier modulation part and the transmission signal allocation part.
    Type: Grant
    Filed: September 20, 2005
    Date of Patent: May 24, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Naoki Okamoto