Phase Shift Keying Or Quadrature Amplitude Demodulator Patents (Class 329/304)
  • Patent number: 10382244
    Abstract: A method and apparatus are provided. The method includes receiving a reference signal from a transceiver, estimating a time offset (TO) of the reference signal in the frequency domain based on an accumulation of subcarriers before cross-correlation, providing a TO compensated signal of the reference signal based on the estimated TO in the frequency domain, transforming the TO compensated signal into the time domain, and estimating a frequency offset (FO) based on the time domain TO compensated signal.
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: August 13, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Amir Dezfooliyan, Vignesh Sethuraman, Hamed Maleki, Linbo Li, Kee-Bong Song
  • Patent number: 10374718
    Abstract: An I component compensation unit calculates an I component in which a distortion has been compensated, by forming a first polynomial expressing the distortion of the I component based on an I component and a Q component of a quadrature modulation signal and multiplying each term of the first polynomial by a first coefficient. A Q component compensation unit calculates a Q component in which a distortion has been compensated, by forming a second polynomial expressing the distortion of the Q component based on the I component and the Q component of the quadrature modulation signal and multiplying each term of the second polynomial by a second coefficient. A coefficient calculation unit calculates the first and second coefficients by comparing outputs of the I component compensation unit and the Q component compensation unit and a known signal.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: August 6, 2019
    Assignees: NTT ELECTRONICS CORPORATION, NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Yasuharu Onuma, Etsushi Yamazaki, Hiroyuki Nouchi, Tomohiro Takamuku, Katsuichi Oyama, Kazuhito Takei, Masanori Nakamura, Mitsuteru Yoshida, Masahito Tomizawa
  • Patent number: 10326632
    Abstract: A synchronizing radio receiver is disclosed, comprising: an analog baseband receive chain and a digital baseband receive chain. The digital baseband receive chain may comprise an analog to digital converter, a frame synchronization module, a frequency synchronization module, and an orthogonal frequency division multiplexing (OFDM) demodulator, wherein the frequency synchronization module is configured to cross-correlate a plurality of in-phase and quadrature samples to generate a synchronization signal and output the synchronization signal to a local oscillator in the analog baseband receive chain. The digital baseband receive chain may also further comprise a carrier frequency offset (CFO)/sampling frequency offset (SFO) correction module coupled to a frequency synchronization module configured to cross-correlate a plurality of in-phase and quadrature samples, with the CFO/SFO correction module configured to apply correction in a digital domain before outputting a corrected signal to the OFDM demodulator.
    Type: Grant
    Filed: January 3, 2017
    Date of Patent: June 18, 2019
    Assignee: PhasorLab, Inc.
    Inventors: Jian Cui, Joshua C. Park
  • Patent number: 10320596
    Abstract: Circuit and method for modulating filter coefficients of a frequency channelizer having a filter bank include: receiving a wide spectrum input signal; modulating the filter coefficients of the filter bank to sweep a center frequency of each channel of the frequency channelizer, using a modulation scheme; and inputting frequency offset compensation caused by the modulation, and output signals of the frequency channelizer to an application processing circuit to convert the output signals to their original center frequencies.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: June 11, 2019
    Assignee: Raytheon Company
    Inventors: Daniel Thompson, Harry B. Marr
  • Patent number: 10285082
    Abstract: A testing device for testing a device under test emitting a number of beams with respect to its beamforming behavior. Said testing device comprises an antenna, an analyzing unit, and a number of reflectors. Furthermore, each of the number of reflectors is configured to reflect at least one of the number of beams of the device under test to the antenna of the testing device.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: May 7, 2019
    Assignee: ROHDE & SCHWARZ GMBH & CO. KG
    Inventor: Johannes Steffens
  • Patent number: 10228994
    Abstract: An information processing system, an information processing method, and a program capable of satisfactory data analysis are provided. The information processing system includes a frequency conversion unit 205 which converts a plurality of pieces of time-series data obtained through detection carried out by a plurality of sensing units 201 into pieces of frequency data 208, respectively, a model construction unit 211 which generates a correlation model 213 using pieces of the frequency data 208 for at least two sensing units 201 from among the plurality of sensing units 201 and calculates a correlation strength 214 of the correlation model 213, and an error detection unit which determines whether an error has occurred based on the correlation strength 214.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: March 12, 2019
    Assignee: NEC Corporation
    Inventors: Shinji Kasahara, Katsuhiro Ochiai
  • Patent number: 10216314
    Abstract: A touch sensing apparatus includes a touch sensing surface having a plurality of TX electrodes and a plurality of RX electrodes. The touch sensing apparatus also includes capacitance sensing circuitry. The circuitry receives a plurality of drive signals. For each of a plurality of scanning stages, the circuitry applies a respective one of the plurality of drive signals to each of the plurality of TX electrodes substantially simultaneously according to a respective TX pattern. The respective TX pattern for each scanning stage is distinct. The circuitry receives sense signals from the plurality of RX electrodes. Each of the plurality of sense signals represents capacitance of a respective intersection of a respective TX electrode and a respective RX electrode. The circuitry then correlates the received sense signals for the plurality of scanning stages with the received drive signals to detect an object proximate to the touch panel.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: February 26, 2019
    Assignee: PARADE TECHNOLOGIES, LTD.
    Inventors: Viktor Kremin, Roman Ogirko
  • Patent number: 10216575
    Abstract: A data storage device includes an encoder and a memory that includes multiple storage elements. The encoder is configured to receive input data and to map at least one input group of bits of the input data to generate output data including at least one output group of bits. Each input group of bits of the at least one input group of bits and each output group of bits of the at least one output group of bits has the same number of bits. Each storage element of the multiple storage elements is configured to be programmed to a voltage state corresponding to an output group of bits of the at least one group of bits associated with the storage element.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: February 26, 2019
    Assignee: SanDisk Technologies LLC
    Inventors: Rishi Gautam Mukhopadhyay, Rajesh Kumar Neermarga, Abhijeet Manohar
  • Patent number: 10177809
    Abstract: In an ultra-wideband (“UWB”) receiver, a received UWB signal is periodically digitized as a series of ternary samples. During a carrier acquisition mode of operation, the samples are continuously correlated with a predetermined preamble sequence to develop a correlation value. When the value exceeds a predetermined threshold, indicating that the preamble sequence is being received, estimates of the channel impulse response (“CIR”) are developed. When a start-of-frame delimiter (“SFD”) is detected, the best CIR estimate is provided to a channel matched filter (“CMF”). During a data recovery mode of operation, the CMF filters channel-injected noise from the sample stream. Both carrier phase errors and data timing errors are continuously detected and corrected during both the carrier acquisition and data recovery modes of operation. In one embodiment, the carrier recovery and timing recovery are performed using just the carrier loop filter.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: January 8, 2019
    Assignee: DecaWave, Ltd
    Inventors: Ciarán McElroy, Michael McLaughlin
  • Patent number: 10177944
    Abstract: An electronic device includes a clock recovery circuit, a converter circuit, and a decoder circuit. The clock recovery circuit generates a reference clock. The converter circuit generates a conversion value that corresponds to a difference between a phase of reception data and a phase of the reference clock. The decoder circuit analyzes a reception characteristic of an antenna based on conversion values that corresponds to a start-of-frame (SOF) marker. The decoder circuit decodes a conversion value that corresponds to encoded data following the SOF marker in the reception data, with reference to the analyzed reception characteristic, into a digital value.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: January 8, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyukjun Sung, Hyunjae Kang, Dohyung Kim, Jaehun Choi
  • Patent number: 10165612
    Abstract: A wireless connecting method is disclosed. The wireless connecting method includes the following operations: connecting a device to a computer by BLUETOOTH; determining the computer is a host or a accessory for the device; operating the computer as the host for the device by a Microsoft BLUETOOTH stack if the computer is the host for the device; and operating the computer as the accessory for the device by an application if the computer is the accessory for the device. The computer is operated as the host and the accessory at the same time.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: December 25, 2018
    Assignee: I/O INTERCONNECTED, LTD.
    Inventor: Ping-Shun Zeung
  • Patent number: 10153790
    Abstract: This disclosure relates to a devices and methods related to satellite information broadcasting. Example embodiments may include frequency shifting an intermediate frequency (IF) signal down-conversion from the microwave-band. As an example, down-conversion involving local oscillators may lead to frequency drift due to varying temperature and/or humidity conditions. Correcting for the frequency drift may provide an opportunity to remove or filter excess bandwidth. Further embodiments may include receiving, in a tuning request, information about a transponder type. A frequency translation module may be adjusted based, at least in part, on the transponder type related to the IF signal being input into the frequency translation module. Such frequency-shifting and transponder-specific filtering may allow Single-Wire Multiswitch (SWM) devices to provide output signals with narrower bandwidth, which may improve signal quality, cable run length, reduce power demands, etc.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: December 11, 2018
    Assignee: The DIRECTV Group, Inc.
    Inventors: Kushan Shah, Benjamin Mui
  • Patent number: 10129011
    Abstract: An apparatus comprising: a signal detection circuit determine a count reached by a counter between successive detected edge signals and to provide an indication of whether successive detected edge signals are separated from each other by at least a prescribed time interval; a clock circuit that produces clock signal pulses in response to a provided indication of an occurrence of a succession of detected edge signals each separated from a previous edge signal of the succession by at least the prescribed time interval; phase matching circuitry configured to align the produced clock signal pulses with detected edge signals; and a pattern matching circuit that that samples a sequence of detected edge signals aligned with the produced clock signal pulses to detect a data packet.
    Type: Grant
    Filed: May 25, 2017
    Date of Patent: November 13, 2018
    Assignee: Analog Devices Global
    Inventors: Muhammad Kalimuddin Khan, Kenneth J. Mulvaney, Philip P. E. Quinlan, Shane O'Mahony
  • Patent number: 10116476
    Abstract: A method for demodulating a received signal relating to a sequence of transmitted symbols that have been modulated by continuous phase modulation includes normalizing samples of a sequence of samples generated from the received signal, to obtain a normalized sequence of samples, wherein an amplitude of each sample of the normalized sequence of samples has an absolute value equal to unity; estimating, on the basis of the normalized sequence of samples, a time offset and a frequency offset of the received signal, and using the estimated time offset and the estimated frequency offset for compensating the normalized sequence of samples for the time and frequency offsets, to obtain a compensated sequence of samples; and determining a sequence of symbols corresponding to the transmitted sequence of symbols on the basis of the compensated sequence of samples.
    Type: Grant
    Filed: January 22, 2014
    Date of Patent: October 30, 2018
    Assignee: European Space Agency
    Inventors: Giulio Colavolpe, Alessandro Ugolini, Tommaso Foggi, Juan Lizarraga Cubillos, Alberto Ginesi, Stefano Cioni
  • Patent number: 10069670
    Abstract: A transmission and reception circuit includes a transmission circuit, a reception circuit, and a signal feedback path. The transmission path includes an output section, a signal generating circuit generating an in-phase component signal and an orthogonal component signal, and a transmission analog baseband circuit configured to perform digital to analog conversion of the generated in-phase component signal and orthogonal component signal. The reception circuit includes an input section, a reception analog baseband circuit performing analog to digital conversion of the transmitted in-phase component signal and orthogonal component signal, and a signal detection circuit that detects the analog-to-digital converted in-phase component signal and orthogonal component signal converted by the reception analog baseband circuit.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: September 4, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shigehito Saigusa, Yousuke Hagiwara, Toshiyuki Yamagishi, Hiroshi Yoshida, Ichiro Seto
  • Patent number: 10063368
    Abstract: A phase locked loop circuit that is capable of stabilizing a frequency of an input signal even in the case where the frequency is unstable is provided. The phase locked loop circuit that corrects a frequency error of an output signal from an oscillator to a predetermined target frequency; an ADC that converts the output signal to a digital signal; reference frequency output means that outputs a reference frequency signal; frequency error detection means that detects the frequency error based on the digital signal and the reference frequency signal; correction signal generation means that generates an error correction signal based on the frequency error; a DAC that converts the error correction signal to an analog signal; and a multiplier that multiplies the output signal by the analog signal to correct the frequency error of the output signal.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: August 28, 2018
    Assignee: R.F. ARCHITECTURE CO., LTD.
    Inventor: Shinichi Morisaka
  • Patent number: 10042472
    Abstract: A multi-stimulus controller for a multi-touch sensor is formed on a single integrated circuit (single-chip). The multi-stimulus controller includes a transmit oscillator, a transmit signal section that generates a plurality of drive signals based on a frequency of the transmit oscillator, a plurality of transmit channels that transmit the drive signals simultaneously to drive the multi-touch sensor, a receive channel that receives a sense signal resulting from the driving of the multi-touch sensor, a receive oscillator, and a demodulation section that demodulates the received sense signal based on a frequency of the receive oscillator to obtain sensing results, the demodulation section including a demodulator and a vector operator.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: August 7, 2018
    Assignee: Apple Inc.
    Inventors: Steven Porter Hotelling, Christoph Horst Krah, Marduke Yousefpor, Thomas James Wilson
  • Patent number: 10012694
    Abstract: A technique for testing an electronic UUT by a test apparatus includes obtaining multiple DFTs of a test signal received from the UUT with the test apparatus configured differently for obtaining each DFT. The resulting DFTs include both valid content representing the test signal and invalid content introduced by the test apparatus. The improved technique suppresses the invalid content by generating a corrected DFT, which provides minimum magnitude values for corresponding frequencies relative to the test signal across the multiple DFTs.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: July 3, 2018
    Assignee: AAI Corporation
    Inventors: James Joseph Jaklitsch, Jay Michael Markey
  • Patent number: 10002094
    Abstract: A microcontroller for a control unit, in particular for a vehicle control unit, includes a central processing unit (CPU), at least one interface-unspecific input module, at least one interface-unspecific output module, at least one routing unit and at least one arithmetic unit for processing interface-specific information. The microcontroller is configurable in such a way that the at least one interface-unspecific input module, the at least one interface-unspecific output module, the at least one routing unit and the at least one arithmetic unit for processing interface-specific information fulfill functions corresponding to one of multiple serial interfaces, in particular of SPI, UART, LIN, CAN, PSI5, FlexRay, SENT, IC2, MSC or Ethernet. In addition, the input module stores an entire input message frame of the input data and makes this available to the arithmetic unit or the central processing unit (CPU).
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: June 19, 2018
    Assignee: Robert Bosch GmbH
    Inventors: Axel Aue, Eugen Becker
  • Patent number: 9985650
    Abstract: A digital down converter includes a low resolution mixer, a decimation filter, and a high resolution mixer. The low resolution mixer is configured to receive a digitized radio frequency signal, and apply a first down conversion to the radio frequency signal to produce an intermediate frequency signal. The decimation filter is coupled to the low resolution mixer. The decimation filter is configured to receive the intermediate frequency signal, and reduce a sampling rate of the intermediate frequency signal to produce a decimated intermediate frequency signal. The high resolution mixer is coupled to the decimation filter. The high resolution mixer is configured to receive the decimated intermediate frequency signal, and apply a second down conversion to the decimated intermediate frequency signal to produce a down converted signal.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: May 29, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Jawaharlal Tangudu, Suvam Nandi, Jaiganesh Balakrishnan
  • Patent number: 9973367
    Abstract: Apparatuses, systems, ambient RF backscatter transceivers, and methods for communicating using MIMO and spread spectrum coding of backscattered ambient RF signals are described. An example system may include an ambient RF backscatter transceiver that include an antenna configured to receive a backscattered ambient radio frequency (RF) signal, and a receiver coupled to the antenna. The receiver may be configured to demodulate the backscattered ambient RF signal using one of multiple input, multiple output multiplexing demodulation or spread spectrum code demodulation to retrieve the first data. The backscattered ambient RF signal may be generated by backscattering an ambient RF signal at a first frequency. The ambient RF signal may be configured to provide other data at a second frequency.
    Type: Grant
    Filed: February 11, 2015
    Date of Patent: May 15, 2018
    Assignee: University of Washington
    Inventors: Shyamnath Gollakota, Joshua R. Smith, Aaron N. Parks, Angli Liu
  • Patent number: 9913234
    Abstract: Because a phase offset occurs between adjoining input blocks of multiple divided blocks when the amount of frequency deviation compensation is dynamically changed, there is the possibility that a restored bit string contains an error. This frequency deviation compensation scheme is equipped with: a frequency deviation compensation means for compensating for a frequency deviation in a frequency-domain signal; and a phase offset compensation means for compensating for a phase offset caused to the signal due to change in an amount of compensation during the frequency compensation.
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: March 6, 2018
    Assignee: NEC CORPORATION
    Inventor: Daisaku Ogasahara
  • Patent number: 9900187
    Abstract: A wireless communication system is provided.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: February 20, 2018
    Assignee: NEC CORPORATION
    Inventor: Ichiro Tsujimoto
  • Patent number: 9893756
    Abstract: An Ethernet transceiver integrated circuit (IC) chip is disclosed. The IC chip includes multiple physical sub-channels, where each sub-channel transfers data symbols along a wired link. Each data symbol representing a group of multiple data bits. Logic determines a signal quality parameter value for each of the sub-channels. For each sub-channel, in a first mode where a given sub-channel exhibits a signaling quality above a first predetermined threshold, the logic assigns a modulation of a first type associated with a first constellation. In a second mode where a given sub-channel exhibits a signaling quality below the first predetermined threshold, the logic assigns a modulation of a second type associated with a second constellation that is sparser than the first constellation.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: February 13, 2018
    Assignee: Aquantia Corp.
    Inventors: Hossein Sedarat, Ramin Farjad
  • Patent number: 9893877
    Abstract: Techniques for synchronization between multiple sampling circuits using a single pin interface to control an output data rate are described. The frequency or rate of a signal on this pin can be automatically determined and used to accomplish the required output data rate. Also described are techniques for using a single pin interface that can allow a sampling device to operate either in a master mode that can generate data strobes, or in a slave mode that can receive a convert start signal. Also described are techniques for controlling bandwidth and throughput for individual channels in a multi-channel device using a single pin interface. For example, using various techniques of this disclosure, integer multiple rate control for other channels can be provided thereby providing varying ODR for different channels, which can also control the bandwidth of interest.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: February 13, 2018
    Assignee: Analog Devices Global
    Inventors: Mayur Gurunath Anvekar, Venkata Aruna Srikanth Nittala, Roberto Sergio Matteo Maurino, Naiqian Ren
  • Patent number: 9876569
    Abstract: A method and system for simultaneous mitigation of optical impairment from both equalizer-phase noise interaction (EPNI) and fiber nonlinear effects (FNE) is disclosed. In one embodiment, the method is directed to simultaneous mitigation of optical impairment from both equalizer-phase noise interaction (EPNI) and fiber nonlinear effects (FNE) using a fast-adaptive multi-tap digital filter.
    Type: Grant
    Filed: October 15, 2015
    Date of Patent: January 23, 2018
    Assignee: AT&T Intellectual Property I, L.P.
    Inventor: Xiang Zhou
  • Patent number: 9857477
    Abstract: A method of generating a correlation function for a CBOC(6,1,1/11) signal according to the present invention includes generating a delayed signal delayed based on a phase delay, with respect to a signal pulse train of a CBOC(6,1,1/11)-modulated received signal, generating first to twelfth partial correlation functions by performing an autocorrelation operation of the received signal and the delayed signal with respect to a total time, generating a basic intermediate correlation function by performing an elimination operation on sixth and seventh partial correlation functions, acquiring first to fifth and eighth to twelfth additional intermediate correlation functions by performing an elimination operation on each of partial correlation functions, excluding the sixth and seventh partial correlation functions from the first to twelfth partial correlation functions, and a basic intermediate correlation function, and acquiring the main correlation function by simply summing the basic intermediate correlation func
    Type: Grant
    Filed: November 6, 2014
    Date of Patent: January 2, 2018
    Assignee: Research & Business Foundation Sungkyunkwan University
    Inventors: Seok Ho Yoon, Keun Hong Chae
  • Patent number: 9860098
    Abstract: An embodiment of the present invention relates to an ultra low power wideband asynchronous binary phase shift keying (BPSK) demodulation method and a circuit configuration thereof. The ultra low power wideband asynchronous BPSK demodulation circuit comprises a sideband division and upper sideband signal delay unit dividing a modulated signal into an upper sideband and a lower sideband by a first order high-pass filter and a first order low-pass filter; a data demodulation unit latching, through a hysteresis circuit, a signal generated by a difference between the analog signals in which a phase difference between the delayed upper sideband analog signal and the lower sideband analog signal is aligned at 0°, so as to demodulate digital data; and a data clock recovery unit for generating a data clock by using a signal digitalized from the lower sideband analog signal through a comparator and a data signal.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: January 2, 2018
    Inventor: Benjamin P. Wilkerson
  • Patent number: 9853844
    Abstract: Disclosed embodiments include a receiver having an input that receives a frequency shift key (FSK) signal having a preamble comprising preamble symbols, a phase compensator that applies a compensation vector to one of first and second samples of a first preamble symbol, wherein applying the compensation vector to the one of the first and second samples produces a compensated sample, a demodulator that determines a phase offset between the compensated sample and the other one of the first and second samples of the first preamble symbol, and a frequency offset mapper that determines a frequency offset based at least upon the phase offset. The receiver applies the frequency offset to the FSK signal.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: December 26, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Wenxun Qiu, Timothy Mark Schmidl
  • Patent number: 9847822
    Abstract: A transmission method of simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals. One of signal generation processing in which phase change is performed and signal generation processing in which phase change is not performed is selectable, thereby improving general versatility in signal generation.
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: December 19, 2017
    Assignee: SUN PATENT TRUST
    Inventors: Yutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi
  • Patent number: 9838154
    Abstract: Systems and methods for decoding block and concatenated codes are provided, including channel state information estimation such as by using optimum filter lengths based on channel selectivity and adaptive decision-directed channel estimation. These improvements enhance the performance of various communication systems and consumer electronics, including HD Radio receivers and systems.
    Type: Grant
    Filed: July 29, 2014
    Date of Patent: December 5, 2017
    Assignee: LN2 DB, LLC
    Inventors: Branimir R Vojcic, Hakan Dogan
  • Patent number: 9823768
    Abstract: Each one or each set of driving electrodes of a touch screen corresponds to a delay phase difference. Whenever a driving signal is provided to one or a set of the driving electrodes, a signal on at least one of sensing electrodes of the touch screen is measured after being delayed by the delay phase difference corresponding to the one or the set of the driving electrodes being provided with the driving signal.
    Type: Grant
    Filed: May 17, 2013
    Date of Patent: November 21, 2017
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventor: Chin-Fu Chang
  • Patent number: 9760745
    Abstract: A signal processing device includes: an extraction section configured to extract a signal having a predetermined component from an obtained signal; and a detection section configured to determine a timing of decoding when a modulation part lasting for a first time period and a non-modulation part lasting for a second time period are detected from the signal extracted by the extraction section.
    Type: Grant
    Filed: January 16, 2014
    Date of Patent: September 12, 2017
    Assignee: Sony Corporation
    Inventors: Yasuhiro Iida, Kazuhiro Oguchi
  • Patent number: 9729119
    Abstract: In some implementations, an automatic gain control (AGC) circuit comprises: a pre-divider circuit operable to pre-divide an input signal according to a pre-divider circuit setting and output a pre-divided signal; a pre-amplifier operable to pre-amplify the pre-divided signal and output a pre-amplified signal; a post-divider circuit operable to post-divide the pre-amplified signal according to a post-divider circuit setting; an analog-to-digital converter (ADC) operable to generate a digital data stream from the post-divided signal; logic operable to sample the digital data stream; determine a pre-divider circuit setting and a post-divider circuit setting based on the sampled data stream; set the pre-divider circuit and the post-divider circuit based on the determined settings; and generate a received signal strength value based on the pre-divider circuit setting and the post-divider circuit setting.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: August 8, 2017
    Assignee: Atmel Corporation
    Inventors: Werner Blatz, Michael Sagebiel, Thomas Janz, Martin Fischer, Daniel Moser, Jan Knopf
  • Patent number: 9722833
    Abstract: A frequency shift key (FSK) receiver includes a phase compensator for compensating for frequency differences in a transmitter that transmits a FSK signal to the receiver. The phase compensating is performed before the FSK signal is demodulated by the receiver.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: August 1, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Wenxun Qiu, Timothy Mark Schmidl
  • Patent number: 9720875
    Abstract: A receiver includes a phase click detector, a controller, and a comparator. The phase click detector detects phase clicks in an input signal, where a phase click corresponds to a change in phase of at least a first threshold. The controller is coupled to the phase click detector for calculating a number of phase clicks within one or more time periods. The comparator compares the number of phase clicks within the one or more time periods, and provides an arrival signal if the number of phase clicks is less than a second threshold.
    Type: Grant
    Filed: July 24, 2013
    Date of Patent: August 1, 2017
    Inventors: Hendricus de Ruijter, Wentao Li
  • Patent number: 9722645
    Abstract: An apparatus for generating a transmit signal includes an up-conversion module and a delay module. The up-conversion module up-converts a first component signal of a multi-phase baseband transmit signal using a first oscillator signal and up-converts a delayed second component signal of the multi-phase baseband transmit signal using a second oscillator signal to generate a radio frequency transmit signal. The first oscillator signal and the second oscillator signal comprise an oscillator signal phase offset so that an edge of the second oscillator signal occurs earlier than a corresponding edge of the first oscillator signal. The delay module delays a second component signal of the multi-phase baseband transmit signal relative to the first component signal of the multi-phase baseband transmit signal by a predefined component signal delay to generate the delayed second component signal of the multi-phase baseband transmit signal.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: August 1, 2017
    Assignee: Intel IP Corporation
    Inventors: Jovan Markovic, Jan Zaleski, Christian Mayer
  • Patent number: 9705571
    Abstract: Aspects of the subject disclosure may include, for example, receiving, by a network element of a distributed antenna system, a reference signal and a first modulated signal at a first carrier frequency, the first modulated signal including first communications data provided by a base station and directed to a mobile communication device. The element converts the first modulated signal at the first carrier frequency to the first modulated signal in a first spectral segment based on an analog signal processing of the first modulated signal and utilizing the reference signal to reduce distortion during the converting. The network element wirelessly transmits the first modulated signal at the first spectral segment to the mobile communication device. Other embodiments are disclosed.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: July 11, 2017
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: Irwin Gerszberg, Paul Shala Henry, Robert Bennett, Farhad Barzegar, Donald J Barnickel, Thomas M. Willis, III
  • Patent number: 9692461
    Abstract: An amplifier module includes a magnitude detector configured to detect a magnitude of a reflection coefficient, and a phase detector configured to detect a phase of the reflection coefficient The magnitude detector includes an incident signal amplifier configured to amplify an incident signal, an output level controller configured control a level of an output of the incident signal amplifier, a reflected signal amplifier configured to amplify a reflected signal, and a comparator configured to compare an output of the incident signal amplifier with an output of the reflected signal amplifier to output a comparison result indicating whether the magnitude of the reflection coefficient is equal to or greater than a threshold determined based on the control signal.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: June 27, 2017
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Joo Young Jeon, Donghyeon Ji, Jung Hyun Kim
  • Patent number: 9685925
    Abstract: In some implementations, an automatic gain control (AGC) circuit comprises: a pre-divider circuit operable to pre-divide an input signal according to a pre-divider circuit setting and output a pre-divided signal; a pre-amplifier operable to pre-amplify the pre-divided signal and output a pre-amplified signal; a post-divider circuit operable to post-divide the pre-amplified signal according to a post-divider circuit setting; an analog-to-digital converter (ADC) operable to generate a digital data stream from the post-divided signal; logic operable to sample the digital data stream; determine a pre-divider circuit setting and a post-divider circuit setting based on the sampled data stream; set the pre-divider circuit and the post-divider circuit based on the determined settings; and generate a received signal strength value based on the pre-divider circuit setting and the post-divider circuit setting.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: June 20, 2017
    Assignee: Atmel Corporation
    Inventors: Werner Blatz, Michael Sagebiel, Thomas Janz, Martin Fischer, Daniel Moser, Jan Knopf
  • Patent number: 9647609
    Abstract: A transceiver may include a reception (Rx) radio frequency (RF) part configured to process a received signal, a transmission (Tx) RF part configured to process a transmitted signal, and a phase lock loop (PLL) configured to provide a reception frequency to the reception RF part and provide a transmission frequency to the transmission RF part. The PLL may be controlled according to whether the reception RF part or the transmission RF part is on. In addition, a transceiver may include quenching waveform generator (QWGs) to control quenching waveforms of the RF parts corresponding to a plurality of antennas. The quenching waveforms may be generated respectively by VCOs operating at a same frequency. The QWGs may control the VCOs such that the quenching waveforms do not overlap.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: May 9, 2017
    Assignees: Samsung Electronics Co., Ltd., SUNGKYUNKWAN UNIVERSITY FOUNDATION FOR CORPORATE COLLABORATION
    Inventors: Jaesup Lee, Hong Jin Kim, Hyung Gu Park, Kang Yoon Lee
  • Patent number: 9648025
    Abstract: A file is received. Contents of the file are transformed using a space-filling curve. One example of a space-filling curve that can be used for the transformation is a Hilbert curve. The result of the transformation is down-sampled. One example way of down-sampling is using a blur operation with anti-aliasing. A hashing operation is performed on the down-sampled result. One example of a hashing operation is locality sensitive hashing.
    Type: Grant
    Filed: February 3, 2015
    Date of Patent: May 9, 2017
    Assignee: Support Intelligence, Inc.
    Inventor: Rick Holloman Wesson
  • Patent number: 9628125
    Abstract: A device is provided for correlating at least one noisy analog signal which is one of a plurality of signals obtained by a plurality of receivers. The device comprises a 1-bit quantization element to which the noisy signal is supplied; a comparator configured to compare the quantized signal with a reference signal which is a consensus signal obtained by averaging data from the plurality of receivers; and an up/down counter that is configured to be incremented by a subset of the comparison signal.
    Type: Grant
    Filed: August 23, 2013
    Date of Patent: April 18, 2017
    Assignee: Phasor Solutions Limited
    Inventor: Richard Hammond Mayo
  • Patent number: 9628193
    Abstract: A method for estimating the phase of a modulated complex optical signal, according to which, the phase of the signal is isolated and the complex amplitude of the signal is digitized by a block of P samples. An adaptive filter minimizes phase-error between the phase of the received symbol and the phase of a sample, rotated by a phase correction factor, by iteratively performing a Block-Wise Phase LMS estimation on the samples using a step size parameter. During each iteration, the resulting correction factor consists of the sum of the estimated errors multiplied by this parameter, and the correction factor of previous iteration, which is updated, until obtaining the final correction factor from the last iteration. The samples constituting the received signal are recovered by adding the most updated correction factor to the phase of each sample and performing a decision regarding the phase of each sample.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: April 18, 2017
    Assignee: Multiphy Ltd.
    Inventors: Nir Sheffi, Gilad Katz, Albert Gorshtein, Ehud Barzilai, Dan Sadot
  • Patent number: 9601123
    Abstract: The approach shown provides for an efficient implementation of time response, level response and frequency response alignment between two audio sources such as DAB and FM that may be time offset from each other by as much as 2 seconds, and produces an aurally undetectable transition between the sources. Computational load is significantly reduced over the approaches known in the prior art.
    Type: Grant
    Filed: May 4, 2015
    Date of Patent: March 21, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: John Elliott Whitecar, Trudy D Stetzler
  • Patent number: 9602151
    Abstract: Provided is an apparatus and method for transmitting and receiving wireless signals. A transmitting apparatus has a signal processor and a transmitter. The signal processor is configured to generate a signal having a middle channel and at least one side channel. The transmitter is configured to wirelessly transmit the signal subject to a spectral mask that has shoulder regions. According to an embodiment of the invention, the signal processor generates the signal such that each side channel is positioned in one of the shoulder regions of the spectral mask. In this manner, bandwidth from the shoulder regions can be utilized by one or more side channels. Also provided is a receiving apparatus having a receiver configured to wirelessly receive the signal, and a signal processor configured to process the signal.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: March 21, 2017
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Mahdi Zamani, Ahikam Aharony, Zhuhong Zhang, Chuandong Li, Weikun Hou
  • Patent number: 9582123
    Abstract: A touch panel sensor system configured to measure mutual-capacitance and self-capacitance is disclosed. The touch panel sensor system includes a sensor configured to detect a change in capacitance associated with a touch event upon a touch panel and a measuring component. The measuring component is configured to detect mutual-capacitance during the first mode of operation and to detect self-capacitance during the second mode of operation. The system also includes a selection component that is configured to receive a selection signal to cause selection of the mode of operation. The system also includes a driver component coupled to the selection component and configured to generate a drive signal, which is furnished to the sensor during the first mode of operation and furnished to the measuring module during the second mode of operation. The amplitude characteristic of the drive signal may have differing values for the first and second modes of operation.
    Type: Grant
    Filed: November 26, 2012
    Date of Patent: February 28, 2017
    Assignee: QUALCOMM Incorporated
    Inventor: Rajesh Tiruvuru
  • Patent number: 9553754
    Abstract: A method and apparatus for reducing distortion of satellite signals modulated using amplitude phase shift keying (APSK) are disclosed. A receiver such as a user terminal receives, from a satellite, a signal including APSK-modulated symbols mapped to a constellation including a plurality of points arranged in an inner circle and in an outer circle; determines, based on the received APSK-modulated symbols, a ratio between a radius of the inner circle of the constellation and a radius of the outer circle of the constellation; generates a correction signal based, at least in part, on a comparison between the determined ratio and a reference ratio; compensates for distortion of the received signal based, at least in part, on the correction signal; mixes the correction signal with the received signal to generate a distortion-compensated signal; and de-modulates the distortion-compensated signal to recover data transmitted from the satellite.
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: January 24, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Alexander Dorosenco, Roy Franklin Quick, Jr.
  • Patent number: 9543631
    Abstract: A tapered airline directional coupler includes a housing having a length with an input end and an output end, the housing having a slot formed therein extending between the input end and the output end. The coupler also includes a main conductor in electrical communication with an input port connector mounted on the housing at the input end thereof and with an output port connector mounted on the housing at the output end thereof, and a coupled conductor in electrical communication with and extending between a forward coupling port connector mounted on the housing adjacent to the input end thereof and a reverse coupling port connector mounted on the housing adjacent to the output end thereof. Each of the slot, the main conductor and the coupled conductor has a cross-sectional area that varies depending upon where the cross-section is taken along the length of the housing.
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: January 10, 2017
    Assignee: R & D Microwaves, LLC
    Inventor: Marek E. Antkowiak
  • Patent number: 9510218
    Abstract: Access terminals are adapted to facilitate closed-loop transmit diversity in wireless communications systems. According to one example, an access terminal can calculate an uplink error rate for even slot indexes and a separate uplink error rate for odd slot indexes in an uplink frame to be transmitted. A respective downlink error rate can be estimated for an in-phase (I) component and a quadrature-phase (Q) component of a downlink transmission. The access terminal may further estimate a phase-related weight that was applied to the downlink transmission based on the downlink error rates and the uplink error rates. Other aspects, embodiments, and features are also included.
    Type: Grant
    Filed: May 1, 2014
    Date of Patent: November 29, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Nate Chizgi, Wei Zhang