Miscellaneous Patents (Class 375/377)
  • Patent number: 8650448
    Abstract: Retransmission techniques are disclosed. These techniques may be used in networks employing contention-based access schemes, such as CSMA. For instance, a device may receive a corrupted packet from a transmitting device, and determine a cause of the corruption. When the determined cause of the corruption is an in-network packet collision, the device allows the transmitting device to send a retransmission of the packet in accordance with a contention-based access scheme. However, when the determined cause of the corruption is other than an in-network packet collision, the device provides retransmission assistance to the transmitting device. This retransmission assistance may include a channel reservation for a retransmission, and/or one or more link adaptation suggestions for the transmitting device.
    Type: Grant
    Filed: October 13, 2009
    Date of Patent: February 11, 2014
    Assignee: Intel Corporation
    Inventors: Qinghua Li, Ozgur Oyman, Xintian E. Lin
  • Patent number: 8638851
    Abstract: A video coding system and method for increasing a transmitted output bit rate of a video encoding system by altering the content of the bit stream. A video encoder may receive a coding mode signal from a computer application for coding source video data, the coding mode signal indicating a target bit rate having a risk factor related to transmission error associated to the target bit rate. The coded bitstream may be modified based on the risk factor indicated in the coding mode signal. A modified coded bitstream may be outputted at the target bit rate and at a reduced coding efficiency, and the channel may be tested for transmission errors. Based on the test results, a revised coding mode signal indicating the same target bit rate, but a revised risk factor may be provided. The coded bitstream may be revised by removing the modifications previously made to the coded bitstream and a revised coded bitstream having greater coding efficiency may be output at the target bit rate.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: January 28, 2014
    Assignee: Apple Inc.
    Inventors: Hyeonkuk Jeong, Xiaosong Zhou, Joe Abuan, Xiaojin Shi, Hsi-Jung Wu, James Oliver Normile
  • Patent number: 8634508
    Abstract: Data is communicated through two separate circuits or circuit groups, each having clock and mode inputs, by sequentially reversing the role of the clock and mode inputs. The data communication circuits have data inputs, data outputs, a clock input for timing or synchronizing the data input and/or output communication, and a mode input for controlling the data input and/or output communication. A clock/mode signal connects to the clock input of one circuit and to the mode input of the other circuit. A mode/clock signal connects to the mode input of the one circuit and to the clock input of the other circuit. The role of the mode and clock signals on the mode/clock and clock/mode signals, or their reversal, selects one or the other of the data communication circuits.
    Type: Grant
    Filed: October 30, 2012
    Date of Patent: January 21, 2014
    Assignee: Texas Instruments Incorporated
    Inventor: Lee D. Whetsel
  • Patent number: 8634482
    Abstract: Radio devices such as long range radio devices configurable with a limited, configuration only power that is insufficient for normal operation of the radio are disclosed. Portable, limited power supplies allow effective configuration of radio devices at remote locations in the field. Methods of configuring radio devices are likewise disclosed.
    Type: Grant
    Filed: November 17, 2009
    Date of Patent: January 21, 2014
    Assignee: Cooper Technologies Company
    Inventors: Kevin Towers, Peter de Buen, Frank Dietrich
  • Patent number: 8625702
    Abstract: A transmitting apparatus and method transmits different modulated signals from a plurality of antennas, and employs a configuration that includes a modulation section that obtains a modulated signal by performing signal point mapping of transmit bits using a signal point arrangement that is divided into a plurality of signal point sets on the IQ plane, whereby the minimum distance between signal points within a signal point set is smaller than the minimum signal point distance between signal point sets; and an antenna that transmits a modulated signal obtained by the modulation section. A signal point generating apparatus generates a first and second symbols to be transmitted by first and second antennas, respectively.
    Type: Grant
    Filed: August 22, 2012
    Date of Patent: January 7, 2014
    Assignee: Panasonic Corporation
    Inventors: Yutaka Murakami, Kiyotaka Kobayashi, Masayuki Orihashi, Akihiko Matsuoka
  • Patent number: 8619841
    Abstract: A transceiver configured to be implemented in a first device includes transmitter and receiver modules and first and second estimator modules. The receiver module receives a first signal transmitted on a channel from a second device to the first device. The first estimator module estimates a first parameter associated with the first signal or the channel. The second estimator module estimates a carrier frequency offset based on the first parameter. The carrier frequency offset is a difference between a first carrier frequency of the first device, and a second carrier frequency of the second device. The transmitter module adjusts a second parameter based on the carrier frequency offset, and based on the second parameter, transmits a second signal to the second device or the receiver module adjusts a third parameter based on the carrier frequency offset, and based on the third parameter, receives a third signal from the second device.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: December 31, 2013
    Assignee: Marvell International Ltd.
    Inventors: Jungwon Lee, Hui-Ling Lou, Dimitrios-Alexandros Toumpakaris
  • Patent number: 8619846
    Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for varying symbol amplitude. In one aspect, a system includes a symbol generator that includes a waveform generator configured to output waveforms at a plurality of selectable fundamental frequencies and with a selectable duty cycle. The symbol generator can also include a bandpass filter having a pass-band that corresponds to a communications channel of a communications network. The system can also include data processing apparatus operable to interact with the symbol generator and further operable to determine that at least a threshold number of endpoints that receive symbols from the symbol generator are experiencing a same type of transmission error. In response to the determination, the data processing apparatus can cause the waveform generator to adjust at least one of the fundamental frequency or a duty cycle of the waveforms.
    Type: Grant
    Filed: April 21, 2011
    Date of Patent: December 31, 2013
    Assignee: Landis+Gyr
    Inventors: Bryce Johnson, Paul Virden
  • Patent number: 8576958
    Abstract: A method for soft remodulation in a receiver of transmissions over a wireless telecommunication system, the method including obtaining from a FEC decoder a-posteriori LLR values, converting the a-posteriori LLR values into bit probabilities and computing improved soft symbols estimates as expected values using the bit probabilities in a recursive algorithm. Preferably, the step of converting is implemented using a pre-computed Look Up Table (LUT). Preferably, the step of computing is implemented in a Multiplier-Accumulator having a SIMD structure.
    Type: Grant
    Filed: July 19, 2011
    Date of Patent: November 5, 2013
    Assignee: Qualcomm Incorporated
    Inventors: Maxim Gotman, Avner Dor, Eran Richardson, Assaf Touboul
  • Patent number: 8565332
    Abstract: Provided are a fixed station receiver for a Multi-Input Multi-Output (MIMO) communication system and an uplink adaptation method thereof. In the uplink adaptation method, a sounding reference signal (SRS) is received from a terminal including a plurality of transmission antennas. A complex channel matrix (H) corresponding to a channel response and a noise variance (?2) corresponding to a noise power is calculated from the sounding reference signal. A signal-to-interference and noise ratio (SINR) on each transmission symbol is calculated with reference to the complex channel matrix (H) and the noise variance (?2). A pre-coding matrix of the terminal is selected with reference to the signal-to-interference and noise ratio (SINR).
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: October 22, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Ok-Sun Park, Gi Yoon Park, Young Jo Ko, Daeho Kim
  • Patent number: 8559533
    Abstract: A method and system are provided which combine (i) adaptive multi-rate half-rate transmission and (ii) intelligent frequency hopping wherein frequency hopping and intelligent underlay overlay are used simultaneously. In the latter, frequency hopping is controlled on a frequency group by frequency group basis, and one frequency hopping group is made up of one or more regular transmitters of a cell and another frequency hopping group is made up of one or more super reuse (super layer) transmitters of the cell. A wireless terminal (e.g., handset) is used in determining the carrier to interference (C/I) ratio for a received signal. A determination is then made as to whether the C/I ratio is acceptable for super layer transmission, and, if the ratio is acceptable, a super reuse transmitter operating in the superlayer range at the half-rate transmission rate is used to transmit a call to the terminal.
    Type: Grant
    Filed: November 12, 2009
    Date of Patent: October 15, 2013
    Assignee: AT&T Mobility II LLC
    Inventors: Arthur Richard Brisebois, Paritosh Rai
  • Patent number: 8553759
    Abstract: Data compression and decompression methods for compressing and decompressing data based on an actual or expected throughput (bandwidth) of a system. In one embodiment, a controller tracks and monitors the throughput (data storage and retrieval) of a data compression system and generates control signals to enable/disable different compression algorithms when, e.g., a bottleneck occurs so as to increase the throughput and eliminate the bottleneck.
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: October 8, 2013
    Assignee: Realtime Data, LLC
    Inventors: James J. Fallon, Stephen J. McErlain
  • Patent number: 8548069
    Abstract: A data transmission system comprises: a pair of transmission lines connecting a plurality of apparatuses; a bridge termination resistor connected between the transmission lines and having a resistance value matching a differential impedance of the transmission lines; a first switch connecting the bridge termination resistor to the transmission lines when being turned on, and disconnecting the bridge termination resistor from the transmission lines when being turned off; pull-up/down resistors connected between the transmission lines and a fixed voltage node, and having resistance values respectively matching characteristic impedances of the transmission lines, the fixed voltage node being a power supply or a ground; and second switches connecting the pull-up/down resistors between the transmission lines and the fixed voltage node when being turned on, and disconnecting the pull-up/down resistors from the transmission lines when being turned off.
    Type: Grant
    Filed: October 13, 2010
    Date of Patent: October 1, 2013
    Assignee: Panasonic Corporation
    Inventors: Hiroshi Suenaga, Osamu Shibata, Yoshiyuki Saito, Kohei Masuda, Yoshihide Komatsu, Masashi Suzuki
  • Patent number: 8548096
    Abstract: Embodiments of user equipment and methods for determining IQ imbalance parameters are described.
    Type: Grant
    Filed: December 31, 2010
    Date of Patent: October 1, 2013
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Chester Park, Jim Svensson
  • Patent number: 8548093
    Abstract: Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals is individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.
    Type: Grant
    Filed: April 11, 2012
    Date of Patent: October 1, 2013
    Assignee: ParkerVision, Inc.
    Inventors: David F. Sorrells, Gregory S. Rawlins, Michael W. Rawlins
  • Patent number: 8542715
    Abstract: A ship based cellular and satellite transceiver receives, demodulates and processes data, voice and video signals from a satellite transmitter and provides the processed signals in cascade to a OFDM and to a CDMA modulator and transmitter for transmission to a ship based mobile unit. The OFDM signal is transmitted in a Wi-Fi network and the CDMA signal is transmitted in frequency bands used by cellular phones and cellular connected devices. The ship based transceiver receives from a mobile unit, e.g. from a cellular phone or a computer an OFDM or a CDMA signal generated and transmitted by the mobile unit and receives, demodulates and processes the cellular phone transmitted signal and provides these processed signals for cascade processing, modulation and transmission to a satellite.
    Type: Grant
    Filed: July 18, 2012
    Date of Patent: September 24, 2013
    Inventor: Kamilo Feher
  • Patent number: 8542071
    Abstract: Chaotic oscillator-based random number generation is described. In an example, a circuit includes a negative differential resistance (NDR) device to receive an alternating current (AC) bias. The circuit further includes a capacitance in parallel with the NDR device, the capacitance having a value such that, in response to a direct current (DC) bias applied to the NDR device and the capacitance, a voltage across the capacitance oscillates with a chaotic period. The circuit further includes a random number generator to generate random numbers using samples of the voltage across the capacitance.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: September 24, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Matthew D Pickett, Gilberto Medeiros Ribeiro, R Stanley Williams
  • Patent number: 8537703
    Abstract: Messages transmitted between a receiver and a transmitter are used to maximize a communication data rate. In particular, a multicarrier modulation system uses messages that are sent from the receiver to the transmitter to exchange one or more sets of optimized communication parameters. The transmitter then stores these communication parameters and when transmitting to that particular receiver, the transmitter utilizes the stored parameters in an effort to maximize the data rate to that receiver. Likewise, when the receiver receives packets from that particular transmitter, the receiver can utilize the stored communication parameters for reception.
    Type: Grant
    Filed: August 30, 2010
    Date of Patent: September 17, 2013
    Assignee: Intel Corporation
    Inventors: Marcos C. Tzannes, Dongjun Lee, Todor Cooklev, Colin Lanzl
  • Patent number: 8532210
    Abstract: The present invention is related to a method and apparatus for implementing space frequency block coding (SFBC) in an orthogonal frequency division multiplexing (OFDM) wireless communication system. The present invention is applicable to both a closed loop mode and an open loop mode. In the closed loop mode, power loading and eigen-beamforming are performed based on channel state information (CSI). A channel coded data stream is multiplexed into two or more data streams. Power loading is performed based on the CSI on each of the multiplexed data streams. SFBC encoding is performed on the data streams for each of the paired subcarriers. Then, eigen-beamforming is performed based on the CSI to distribute eigenbeams to multiple transmit antennas. The power loading may be performed on two or more SFBC encoding blocks or on each eigenmodes. Additionally, the power loading may be performed across subcarriers or subcarrier groups for weak eigenmodes.
    Type: Grant
    Filed: January 27, 2009
    Date of Patent: September 10, 2013
    Assignee: InterDigital Technology Corporation
    Inventors: Jaeyoung Kwak, Robert Lind Olesen, Aykut Bultan, Eldad Zeira, Chang-Soo Koo, Fatih Ozluturk, Yuejin Huang, Kalpendu R. Pasad
  • Patent number: 8526545
    Abstract: A baseband processor including an analog to digital converter configured to convert a baseband signal from an analog format into a corresponding digital format, wherein the baseband signal comprises a data packet having i) a preamble portion, ii) a header portion, and iii) a payload portion, wherein the payload portion of the data packet is in accordance with either i) a first format or ii) a second format. The baseband processor further includes a first demodulation pathway configured to recover i) the preamble portion of the data packet, ii) the header portion of the data packet, and iii) the payload portion of the data packet in response to the payload portion of the data packet being of the first format; and a second demodulation pathway configured to recover the payload portion of the data packet in response to the payload portion of the data packet being of the second format.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: September 3, 2013
    Assignee: Marvell International Ltd.
    Inventor: Yungping Hsu
  • Patent number: 8483625
    Abstract: An RF transceiver apparatus comprises transmitter circuitry arranged to convert signals from a baseband frequency to RF transmission frequencies and receiver circuitry arranged to convert signals from RF reception frequencies to the baseband frequency. The transmitter and receiver circuitry each comprise three mixers arranged to convert a signals between the baseband frequency, a first intermediate frequency; a second intermediate frequency that is higher than the transmission frequencies; and a second intermediate frequency to the transmission frequency.
    Type: Grant
    Filed: July 16, 2007
    Date of Patent: July 9, 2013
    Assignee: Lime Microsystems Limited
    Inventors: Srdjan Milenkovic, Danny Webster, Ebrahim Bushehri, Ri{hacek over (s)}ard Kurylo
  • Patent number: 8477050
    Abstract: A system and method for redundant transmission is provided. In one embodiment, an input signal S is encoded as a list of fragments. Each fragment includes an index value and a projection value. The index points to an entry in a dictionary of signal elements. A repetition factor is assigned to each fragment based on its importance. After a fragment is added, a reconstructed signal is generated by decoding the list of fragments. Encoding terminates once the reconstructed signal is sufficiently close to the original signal S.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: July 2, 2013
    Assignee: Google Inc.
    Inventor: Pascal Massimino
  • Patent number: 8477872
    Abstract: Embodiments of the present invention provide a method for transmitting information in a multi-antenna system. The method may include: a transmitting end receives information transmitted by a receiving end, wherein the information includes information of index of a precoder; the transmitting end selects a precoder from a two-layered codebook based on the information of the index of the precoder; the transmitting end precodes to-be-transmitted data by using the precoder; the transmitting end transmits the precoded data to the receiving end. The technical scheme of the present invention obtains codebooks most matching with channel distribution characteristics of dual-polarized antennas and minimizes performance loss brought by codebook quantization to remarkably improve the performances of precoding systems.
    Type: Grant
    Filed: January 11, 2011
    Date of Patent: July 2, 2013
    Assignee: China Academy of Telecommunications Technology
    Inventors: Ranran Zhang, Qiubin Gao, Deshan Miao, Meifang Jing, Gaishi La
  • Patent number: 8477897
    Abstract: Circuitry for use in aligning bytes in a serial data signal (e.g., with deserializer circuitry that operates in part in response to a byte rate clock signal) includes a multistage shift register for shifting the serial data signal through a number of stages at least equal to (and in many cases, preferably more than) the number of bits in a byte. The output signal of any shift register stage can be selected as the output of this “bit slipping” circuitry so that any number of bits over a fairly wide range can be “slipped” to produce or help produce appropriately aligned bytes. The disclosed bit slipping circuitry is alternatively or additionally usable in helping to align (“deskew”) two or more serial data signals that are received via separate communication channels.
    Type: Grant
    Filed: September 12, 2008
    Date of Patent: July 2, 2013
    Assignee: Altera Corporation
    Inventor: Richard Yen-Hsiang Chang
  • Patent number: 8457181
    Abstract: Methods and apparatus for maintaining the maximum achievable data rate on a DSL line, up to and including a rate to which a user subscribes is described. Performance monitoring is conducted on the DSL line on an ongoing basis to determine noise margins in each direction. Each noise margin is compared against pre-determined decreasing/increasing thresholds to determine whether the line characteristics dictate a data rate change without loss of synchronization. The invention supports dynamic provisioning changes including application driven service level change requests, e.g., new bandwidth-on demand services. In some embodiments, a combination of existing and new embedded operations channel (EOC) messages are used to implement the modem data rate changes. New EOC messages may be implemented using some of the reserved and/or vendor proprietary Opcodes currently permitted. Modem assigned data rate changes are implemented without a disruption of service, e.g.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: June 4, 2013
    Assignee: Intellectual Ventures II LLC
    Inventors: Terrence E Remy, James E. Sylvester
  • Patent number: 8456331
    Abstract: The disclosure relates to a system and a method for hardware encoding and decoding according to the Limpel Ziv STAC (LZS) and Deflate protocols based upon a configuration bit.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: June 4, 2013
    Assignee: Cavium, Inc.
    Inventor: David A. Carlson
  • Patent number: 8457240
    Abstract: Methods are described for near optimal Antenna and/or sensor selection via population-based probabilistic evolutionary algorithms such as estimation of distribution algorithm (EDA) and bio-inspired Optimization (BIO). The aspects of the invention includes a method for joint transmit and receive antenna selection using EDA; and an enhanced EDA, which uses cyclic shift register and biased estimation of distribution; and methods for joint transmit and receive antenna selection using improved population-based optimization. The proposed EDA-based and bio-inspired selection methods results in performances that are close to the ESA (exhaustive search algorithm) and yet impose mush less computational burden than ESA. Another advantage of our methods is that they can be easily implemented on parallel processors.
    Type: Grant
    Filed: August 25, 2009
    Date of Patent: June 4, 2013
    Inventors: Daniel Lee, Muhammad Naeem
  • Patent number: 8457182
    Abstract: Seamless wideband support is afforded by utilizing split-band data streams. For wideband signals, the 8 kHz bandwidth is divided into a low band, with approximately 0-4 kHz bandwidth, and a high band, with approximately 4-8 kHz bandwidth. Narrowband functions and services operate on the low band, while wideband functions and services operate on both low and high bands.
    Type: Grant
    Filed: February 15, 2011
    Date of Patent: June 4, 2013
    Assignee: Broadcom Corporation
    Inventors: Wilf LeBlanc, Phil Houghton, Kenneth Cheung
  • Patent number: 8428200
    Abstract: Provided is an apparatus for estimating a frequency offset by one training symbol including two symbols having the same structure and value in an OFDM system. The apparatus includes a first likelihood function calculator for modeling non-Gaussian impulsive noise included in the training symbol to a Cauchy probability density function in which a characteristic exponent of a BIS?S probability density function is 1, and calculating a likelihood function of a Cauchy distribution using the Cauchy probability density function, and a first frequency offset estimator for estimating an effective frequency offset value in which the likelihood function of the Cauchy distribution of the first likelihood function calculator becomes highest as a frequency offset estimation value. Thereby, it is possible to improve the performance of frequency offset estimation in non-Gaussian impulsive noise environments.
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: April 23, 2013
    Assignee: Sungkyunkwan University Foundation for Corporate Collaboration
    Inventors: Chonghan Song, Junhwan Kim, Youngpo Lee, Seung Goo Kang, Seokho Yoon
  • Patent number: 8422535
    Abstract: A frequency selective digital transmission apparatus includes: a preamble transmission processing unit generating a preamble for frame synchronization and spreading the generated preamble with a predetermined spreading code; a header transmission processing unit configuring a header including data attribute information and spreading the header with a predetermined spreading code; a data transmission processing unit performing serial-to-parallel conversion on transmission data according to a selected transmission mode and a spreading scheme and spreading the same with a frequency selective spreading code; and a multiplexing unit multiplexing the preamble, the header, and the data which have been spread by the preamble transmission processing unit, the header transmission processing unit and the data transmission processing unit, respectively, and transmitting the same as digital signals.
    Type: Grant
    Filed: April 26, 2010
    Date of Patent: April 16, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: In Gi Lim, Hyung Il Park, Tae Wook Kang, Chang Hee Hyoung, Sung Weon Kang, Jung Hwan Hwang, Kyung Soo Kim, Jung Bum Kim, Sung Eun Kim, Jin-Kyung Kim, Hey Jin Myoung, Seok Bong Hyun, Kyung Hwan Park, Byoung Gun Choi, Tae Young Kang
  • Patent number: 8411810
    Abstract: A circuit with adaptive synchronization and a method thereof is provided. The synchronous receiving circuit adaptively adjusts the timing of a clock signal generated therein for receiving data without accompanying a clock signal for synchronization. The synchronous receiving circuit includes a clock generator, an edge detector, a synchronization unit and a latch. The clock generator generates a first clock signal according to an input data signal. The edge detector detects edges to generate an indication signal. The synchronization unit is coupled to the clock generator and the edge detector, and adaptively adjusts the first clock signal according to the indication signal. The latch latches the input data signal according to the adjusted first clock signal.
    Type: Grant
    Filed: April 6, 2009
    Date of Patent: April 2, 2013
    Assignee: MStar Semiconductor, Inc.
    Inventor: Meng Che Tsai
  • Patent number: 8406367
    Abstract: An information apparatus switches a display at a predetermined area which includes at least a part of a portion where an electromagnetic-wave emitting unit used for data communications with a data storage device is disposed, according to data communication processing with the data storage device, and emits sound generated according to the processing at corresponding timing.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: March 26, 2013
    Assignee: Sony Corporation
    Inventors: Hiroyuki Oda, Yojiro Kamise, Hisakazu Yanagiuchi, Yakayuki Ohnishi, Yuji Morimiya, Kazuyoshi Takemura, Kenji Nakada
  • Patent number: 8385394
    Abstract: Disclosed herein are embodiments of an improved built-in self-test (BIST) circuit and an associated method for measuring phase and/or cycle-to-cycle jitter of a clock signal. The embodiments of the BIST circuit implement a Variable Vernier Digital Delay Locked Line method. Specifically, the embodiments of the BIST circuit incorporate both a digital delay locked loop and a Vernier delay line, for respectively coarse tuning and fine tuning portions of the circuit. Additionally, the BIST circuit is variable, as the resolution of the circuit changes from chip to chip, and digital, as it is implemented with standard digital logic elements.
    Type: Grant
    Filed: February 2, 2012
    Date of Patent: February 26, 2013
    Assignee: International Business Machines Corporation
    Inventors: Brandon R. Kam, Stephen D. Wyatt
  • Patent number: 8340625
    Abstract: A method, system, and computer-readable media are provided for transmitting wireless data across a coaxial cable. In one aspect, a set of computer-readable media provides a method that includes receiving a request from a mobile device for data and transmitting the data across a coaxial cable to a cable modem. The method further includes sending the data to the mobile device through a base station, wherein the base station communicates with the cable modem in order to receive the data.
    Type: Grant
    Filed: June 6, 2007
    Date of Patent: December 25, 2012
    Assignee: Sprint Communications Company L.P.
    Inventors: Harold Johnson, Timothy Euler
  • Patent number: 8340152
    Abstract: An electronic system having a spread spectrum clock is disclosed. A spread spectrum clock source creates and transmits both a spread spectrum clock signal and a modulation signal. A spread spectrum clock generator uses a modulation waveform on the modulation signal to frequency modulate a reference oscillator frequency. A logic unit comprises a Phase Locked Loop that receives the spread spectrum clock signal and the modulation signal and generates a logic unit clock signal.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: December 25, 2012
    Assignee: International Business Machines Corporation
    Inventors: Mark James Jeanson, Jordan Ross Keuseman, George Russell Zettles, IV
  • Patent number: 8331482
    Abstract: A subcarrier allocation method for use by a transmitter, the transmitter being configured to, when transmitting first and second data streams, allocate pilot symbols for the first and second data streams to subcarriers, such that a first plurality of subcarriers carry the pilot symbols for the first data stream and a second plurality of subcarriers carry the pilot symbols for the second data stream. The method includes allocating, when the transmitter transmits the first data stream but does not transmit the second data stream, the second plurality of subcarriers to carry no formation or information relating to the first data stream.
    Type: Grant
    Filed: June 10, 2009
    Date of Patent: December 11, 2012
    Assignee: Industrial Technology Research Institute
    Inventors: Lai-Huei Wang, Chia-Lung Tsai, Yu-Tao Hsieh, Pang-An Ting, Jen-Yuan Hsu
  • Patent number: 8315336
    Abstract: Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.
    Type: Grant
    Filed: May 19, 2008
    Date of Patent: November 20, 2012
    Assignee: ParkerVision, Inc.
    Inventors: David F. Sorrells, Gregory S. Rawlins, Michael W. Rawlins
  • Patent number: 8311131
    Abstract: The present invention relates to a method for interpolating, for the purpose of measurement of lengths and/or angles, at least two position-dependent, periodic analog signals that are phase-shifted with respect to each other and that are generated by scanning a measuring scale. According to the inventive method, the analog signals are converted to a digital data stream using a sigma-delta modulator, the data streams are combined with correctional factors and then with each other to generate a string of results, and said string of results is used to generate new correctional values by the use of a quality criterion to be satisfied for interpolation and also to generate the output signals of interpolation. The values (d) of the string of results are accumulated over a specified time interval in order to generate the correctional values (k1, k2) and the output signals (w).
    Type: Grant
    Filed: December 4, 2002
    Date of Patent: November 13, 2012
    Assignee: Dr. Johannes Heidenhain GmbH
    Inventor: Roman Woyzichovski
  • Patent number: 8311152
    Abstract: An adaptive receiver comprises a receiver module that receives an orthogonal frequency division multiplexing (OFDM) signal. An operating parameters module monitors at least one operating parameter of the receiver module and generates a select signal based the at least one operating parameter. An estimator module selects between first and second algorithms based on the select signal and selectively estimates a carrier frequency offset (CFO) of the OFDM signal using the one of the first and second algorithms. Alternately, an estimator module adjusts algorithm operating parameters of a first algorithm based on the select signal and selectively estimates a carrier frequency offset (CFO) of the OFDM signal using the selected algorithm operating parameters of the first algorithm.
    Type: Grant
    Filed: November 10, 2004
    Date of Patent: November 13, 2012
    Assignee: Marvell International Ltd.
    Inventors: Jungwon Lee, Hui-Ling Lou, Dimitrios-Alexandros Toumpakaris
  • Patent number: 8306097
    Abstract: A method includes maintaining temporally parallel DSL data communication sessions with DSL modems of a group via a set of lines. The method includes, in response to substantially stopping to receive DSL communications from one of the DSL modems via one of the lines, transmitting a substantially reduced average power to the one of the lines and monitoring the one of the lines to determine whether DSL communications have restarted being received from the one of the DSL modems. The method also includes resuming the maintaining of the temporally parallel DSL communication sessions in response to the monitoring determining that DSL communications have restarted being received from the one of the DSL modems.
    Type: Grant
    Filed: June 10, 2008
    Date of Patent: November 6, 2012
    Assignee: Alcatel Lucent
    Inventors: Adriaan J. De Lind Van Wijngaarden, Jochen Maes, Carl Jeremy Nuzman, Danny Van Bruyssel
  • Patent number: 8299949
    Abstract: A received plurality of signals may be filtered to select an in-band signal and/or an out-of-band. A signal strength of the selected signal(s) may be measured. A resolution of an analog-to-digital converter may be controlled based on the measured signal strength(s). The selected in-band signal may be converted to a digital representation via the analog-to-digital converter. The resolution may be decreased when the strength of the in-band signal is higher, and increased when the strength of the in-band signal is lower. The resolution may be increased when the strength of the out-of-band signal is higher, and decreased when the strength of the out-of-band signal is lower. A signal-to-noise ratio and/or dynamic range of the selected signal(s) may be determined based on the measured signal strength(s), and may be utilized to adjust the resolution of the analog-to-digital converter.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: October 30, 2012
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza Rofougaran
  • Patent number: 8295424
    Abstract: A data receiving apparatus and method includes a current-voltage conversion block, which receives a current-type transmit signal including data and a clock signal inserted into the data at a different level from the data, and then converts the received signal into at least one first voltage and at least one second voltage having a different level from the first voltage, and a comparison block, which makes a comparison between the first and second voltages, and then outputs the received signal as one of the data and the clock signal based on a result of the comparison. The data receiving apparatus can easily recover a clock signal while exhibiting better characteristics during the recovery of the clock signal because it is insensitive to a variation in reference voltage and a variation in current at the transmitting state of the timing controller, which are caused by a process variation.
    Type: Grant
    Filed: December 29, 2009
    Date of Patent: October 23, 2012
    Assignee: Dongbu HiTek Co., Ltd.
    Inventors: Woo Jae Choi, Sang Ho Woo, Mi Youn Kim
  • Patent number: 8295396
    Abstract: A system and method for power control in a wireless transmitter. A power control loop includes a feed forward unit coupled to a data source, the feed forward unit processes a signal for transmission, a feedback unit coupled to the feed forward unit, the feedback unit generates a feedback signal representative of an output power level of the signal transmitted by the feed forward unit, a closed loop power control unit coupled to the feedback unit and to the feed forward unit, the closed loop power control unit generates an additive correction signal based on an error signal computed from the feedback signal and data provided by the data source or software instructions, and a ramp path power control unit coupled to the data source, the ramp path power control unit generates a multiplicative correction signal based on an additive correction signal and data provided by the data source.
    Type: Grant
    Filed: September 22, 2008
    Date of Patent: October 23, 2012
    Assignee: Texas Instruments Incorporated
    Inventors: Khurram Waheed, Tim Foo
  • Patent number: 8289876
    Abstract: According to the invention, an information output, e.g. a voice output, video information output, or a simultaneous output of video and audio information, which is to be transmitted via a packet-oriented network, is generation by means of pre-coded information output components. Said pre-coded information output components are present in a memory system and are retrieved as part of the processing of a request for the output of information by an information output system. Similarly, generation rules for the information output can be stored in the memory system and accessed by the information output system in order to generate the information output. According to one embodiment, information output components or generation rules are created in an information output configuration system and are subsequently made available in the memory system. The invention optimizes the use of resources for information-output services.
    Type: Grant
    Filed: December 9, 2009
    Date of Patent: October 16, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Mathias Franz, Detlev Freund, Norbert Löbig, Johannes Schöpf
  • Patent number: 8289195
    Abstract: A programmable logic device can be configured as a fractional rate resampling filter capable of performing downsampling prior to upsampling without modifying the overall filter response. Input data may be received at a first sample rate and may be downsampled to generate downsampled data. Portions of the downsampled data may be respectively output to different filtering paths. Each filtering path may include a cluster of filter components that corresponds to different subfilters of the overall filter response and may be operable to receive and process the different portions of the downsampled data. Outputs of each cluster may be combined to generate output data at a second sample rate. The resampling filter structure can reduce the number of multiplier circuits used by allowing time-division multiplexing among different filter components.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: October 16, 2012
    Assignee: Altera Corporation
    Inventors: Xiaofei Dong, Hong Shan Neoh
  • Patent number: 8275069
    Abstract: A transmitting apparatus and method transmits different modulated signals from a plurality of antennas, and employs a configuration that includes a modulation section that obtains a modulated signal by performing signal point mapping of transmit bits using a signal point arrangement that is divided into a plurality of signal point sets on the IQ plane, whereby the minimum distance between signal points within a signal point set is smaller than the minimum signal point distance between signal point sets; and an antenna that transmits a modulated signal obtained by the modulation section. A signal point generating apparatus generates a first and second symbols to be transmitted by first and second antennas, respectively.
    Type: Grant
    Filed: March 8, 2011
    Date of Patent: September 25, 2012
    Assignee: Panasonic Corporation
    Inventors: Yutaka Murakami, Kiyotaka Kobayashi, Masayuki Orihashi, Akihiko Matsuoka
  • Patent number: 8265220
    Abstract: The present invention includes a time-division-multiple-access (TDMA) communication system having a base station and at least one mobile station, each transmitting and receiving an analog radio-frequency signal carrying digitally coded speech. The speech is encoded using a vocoder which samples a voice signal at variable encoding rates. During periods when the radio-frequency channel is experiencing high levels of channel interference, the encoded voice channel having a lower encoding rate is chosen. This low-rate encoded voice is combined with the high degree of channel coding necessary to ensure reliable transmission. When the radio-frequency channel is experiencing low levels of channel interference, less channel coding is necessary and the vocoder having a higher encoding rate is used. The high-rate encoded voice is combined with the lower degree of channel coding necessary to ensure reliable transmission.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: September 11, 2012
    Assignee: LG Electronics Inc.
    Inventors: Jaleh Komaili, Yongbing Wan
  • Patent number: 8259820
    Abstract: A low power communication encoding method is provided. A first piece of encoded information and a second piece of encoded information are generated based on a comparison of a current transmission record and a previous transmission record. Then transmission data is selected based on which of the first and second pieces of encoded information will result in transmitting a fewer number of logical lows. Ultimately, the transmission data is transmitted on an open drain data line.
    Type: Grant
    Filed: June 16, 2008
    Date of Patent: September 4, 2012
    Assignee: Texas Instruments Incorporated
    Inventor: Brian Allen
  • Patent number: 8259822
    Abstract: Polar and quadrature modulator for receiving a baseband processed voice signal and for processing, modulating and transmitting voice signal. Voice signal processor and modulator for processing voice signal into Orthogonal Frequency Division Multiplexed (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA) signal. A location finding signal receiver, demodulator and processor for receiving, demodulating and processing a location finder signal into demodulated processed location finder signal. Location finder signal receiver receiving signal from two or more satellite and two or more ground based transmitters. Diversity receivers for signal reception from cellular and from Wireless Local Area Network (WLAN). Filtered polar modulated signal used in a Time Division Multiple Access (TDMA) system including Global Mobile System (GSM). Receiver for receiving transmitted signal has a radio frequency (RF) unit which is located at a remote location from demodulator.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: September 4, 2012
    Inventor: Kamilo Feher
  • Patent number: 8254515
    Abstract: A method for measuring a phase locked loop bandwidth parameter for a high-speed serial link includes the steps of initiating a jitter frequency of a clock input of a phase locked loop equal to a reference frequency with a frequency generator; determining a reference jitter amplitude value of a clock output of the phase locked loop with a waveform analyzer at the reference frequency, the reference jitter amplitude value being a function of a time interval error jitter trend of the clock output at the reference frequency; and adjusting the jitter frequency of the clock input with the frequency generator until an adjusted jitter amplitude value of the clock output reaches a goal value as determined by the waveform analyzer, the adjusted jitter amplitude being a function of a time interval error trend of the clock output at the adjusted frequency.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: August 28, 2012
    Assignee: Integrated Device Technology, Inc.
    Inventors: Dongming Lou, Pengfei Hu, Junqiang Shang, Xin Liu
  • Patent number: 8249209
    Abstract: Systems and methods provide for data transfer and transmission according to a synchronous one-bit interface protocol. A bit stream is generated including first data to be transferred or transmitted and second data from which a clock period used to encode the first data may be extracted. The bit stream is provided to a processor for decoding. In one embodiment, the bit stream includes a start segment or sequence, a data segment and a stop segment or sequence. A clock period is encoded into and is extracted from the start and/or stop sequences. The data segment is decoded on the basis of the clock period.
    Type: Grant
    Filed: June 20, 2005
    Date of Patent: August 21, 2012
    Assignee: Bloomberg Finance L.P.
    Inventors: Christopher William Zimman, James William Hook