Pulse Position, Frequency, Or Spacing Modulation Patents (Class 375/239)
  • Patent number: 10285129
    Abstract: A computer device may include a memory storing instructions and a processor configured to execute the instructions to select a broadcast method for a wakeup signal for a wireless communication device; instruct a base station to broadcast the wakeup signal using the selected broadcast method; and provide information identifying the selected broadcast method to the wireless communication device. The processor may be further configured to receiving a wakeup request from a machine-type communication interworking function (MTC-IWF) device; map the received wakeup request to a wakeup signature beacon signal associated with the wireless communication device; and instruct the base station to transmit a wakeup signature beacon signal to the wireless communication device based on the received wakeup request.
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: May 7, 2019
    Assignee: Verizon Patent and Licensing Inc.
    Inventors: Lei Song, Ye Huang, Jin Yang, Yee Sin Chan, Jignesh S. Panchal
  • Patent number: 10222759
    Abstract: An integrated circuit device includes: a first oscillation circuit that oscillates a first resonator to generate a first clock signal with a first clock frequency; a second oscillation circuit that oscillates a second oscillation element to generate a second clock signal with a second clock frequency that is different from the first clock frequency; and a time-to-digital conversion circuit that converts a time into a digital value using the first and second clock signals.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: March 5, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Katsuhiko Maki, Hideo Haneda, Takashi Kurashina, Akio Tsutsumi, Yasuhiro Sudo
  • Patent number: 10218379
    Abstract: Some embodiments include apparatus and methods using a first digital-to-time converter (DTC) circuit to receive an input clock signal and generate a first clock signal based on the input clock signal, a second DTC circuit to receive the input clock signal and generate a second clock signal based on the input clock signal, and an output circuit to receive the first and second clock signals to generate an output clock signal based on the first and second clock signals.
    Type: Grant
    Filed: April 3, 2018
    Date of Patent: February 26, 2019
    Assignee: Intel Corporation
    Inventors: Rotem Banin, Elias Nassar, Inbar Falkov, Eyal Fayneh, Ofir Degani, Sebastian Sievert
  • Patent number: 10020930
    Abstract: A compressed sensing method based on non-uniform wavelet bandpass sampling. A K-sparse signal of interest is projected onto a sequence of waveforms succeeding one another at the bandpass sampling rate, the waveforms belonging to an overcomplete dictionary, the parameters of the waveforms depending on the characteristics of the bands of the signal. The correlation values are then non-uniformly sampled to provide a compressed representation of the signal.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: July 10, 2018
    Assignees: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES, Cornell University
    Inventors: Michael Pelissier, Christoph Emanuel Studer
  • Patent number: 9882652
    Abstract: The present application is directed an optical communication method. The method includes a step of receiving a signal at a single-polarization receiver. The method also includes a step of detecting, through the single-polarization receiver, the signal including a symbol with a pulse position modulation pulse and an additional modulation. The method also includes a step of decoding a first portion of bits carried by the symbol based on a position of the PPM pulse. Further, the method includes a step of decoding a second portion of the bits at the position through an additional modulation. The application is also directed to an apparatus for optical communication. In addition, the application is directed to an optical communication method which recovers two polarization components form the signal each carrying independent data. Further, the application is directed to an optical communication method that recovers two frequencies of the detected signal.
    Type: Grant
    Filed: April 28, 2015
    Date of Patent: January 30, 2018
    Assignee: LGS INNOVATIONS LLC
    Inventor: Thomas H. Wood
  • Patent number: 9867130
    Abstract: A time slot assignment arrangement for ultralow power devices in a wireless communication network is disclosed. The time slot assigned to ultralow power device wakeup frame is identified as ultralow power timeslot using various indicators. The ultralow power timeslot is assigned as contention based timeslot allowing ultralow power devices in the wireless network to extend the interval for synchronizing with the network overcoming the short synchronization interval requirements of wireless communication network resulting in significant improvement in battery life by preserving the power needed for frequent synchronization with the wireless communication network.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: January 9, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Ariton E. Xhafa, Baher Haroun
  • Patent number: 9755721
    Abstract: The present invention relates to a method for receiving a reference CSI configuration information and a following CSI configuration information which is configured to report a same RI (Rank Indicator) as the reference CSI configuration information, receiving a first precoding codebook subset information for the reference CSI configuration information and a second precoding codebook subset information for the following CSI configuration information, set of RIs according to the second precoding codebook subset information is same as set of RIs according to the first precoding codebook subset information, and transmitting CSI determined based on at least one of the first precoding codebook subset information and the second precoding codebook subset information.
    Type: Grant
    Filed: October 22, 2013
    Date of Patent: September 5, 2017
    Assignee: LG Electronics Inc.
    Inventors: Hyungtae Kim, Byounghoon Kim, Kijun Kim
  • Patent number: 9748968
    Abstract: An extreme index finder and a digital value finding method are provided. The extreme index finder includes a plurality of digital-to-time converters (DTCs) and a first arbiter apparatus. The DTCs respectively receive a plurality of input signals and perform a digital-to-time converting operation on each of the input signals to respectively generate a plurality of time-domain signals. The first arbiter apparatus finds a position of a extreme value in the time-domain signals according to transition speeds of the time-domain signals and compares transition speed of the extreme value with each of the time-domain signals to find an extreme input signal corresponding to the extreme value in the input signals.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: August 29, 2017
    Assignee: National Tsing Hua University
    Inventors: Mao-Ruei Li, Chia-Hsiang Yang, Yeong-Luh Ueng
  • Patent number: 9742524
    Abstract: The method comprising: applying, by a transmitter, a Forward Error Correction to an information block to be sent to a receiver and modulating said information block prior to its transmission, wherein the transmitter has knowledge of a channel frequency response seen by the receiver and the applying and modulating are performed at a variable-rate, at the transmitter side, by: transforming the information block into a number of smaller packets denoted as codeblocks fitting the input sizes accepted by the Forward Error Correction; selecting, a set of modulation and coding schemes to be independently applied to each of the codeblocks; including, information about the selected set of modulation and coding schemes within part of physical resources devoted to user data by reserving specific subcarriers and OFDM symbols; and mapping, said information within physical resources devoted to user data and not reserved for said selected set of modulation and coding schemes, first in order of ascending OFDM symbols and then
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: August 22, 2017
    Assignee: Telefonica, S.A.
    Inventor: Javier Lorca Hernando
  • Patent number: 9564829
    Abstract: It is presented a converter arm for power conversion. The converter arm comprises: a plurality of converter cells, wherein each converter cell comprises a plurality of semiconductor switches, an energy storage element and at least three control signal connections arranged to control the conducting state of the plurality of semiconductor switches. Each converter cell is connected to receive a control signal from at least three entities via said control signal connections, wherein at least two of the three entities are neighboring converter cells, and each converter cell is arranged to forward a control signal to all connected neighboring converter cells via said control signal connections. A corresponding converter device is also presented.
    Type: Grant
    Filed: October 1, 2012
    Date of Patent: February 7, 2017
    Assignee: ABB TECHNOLOGY LTD
    Inventors: Jürgen Häfner, Hans Björklund
  • Patent number: 9531394
    Abstract: A technique for calibrating a digital-to-time converter includes an apparatus including a digital-to-time converter configured to generate an output signal based on a digital code, an input signal, and a gain calibration signal. The output signal has edges linearly delayed from corresponding edges of the input signal based on the digital code. The digital code vacillates between an evaluation code and a calibration code. The apparatus includes a reference signal generator configured to provide a delayed version of the input signal. The delay of the reference signal generator is matched to a delay of the digital-to-time converter. The apparatus includes a calibration circuit configured to generate the gain calibration signal based on the output signal and the delayed version of the input signal. The calibration code may alternate between a first calibration delay code and a second calibration delay code.
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: December 27, 2016
    Assignee: Silicon Laboratories Inc.
    Inventors: Aaron J. Caffee, Brian G. Drost
  • Patent number: 9497006
    Abstract: The present invention relates to a wireless communication system, and more particularly to a method and an apparatus for transmitting uplink signals in a wireless communication system for supporting multiple antenna transmissions. The method for transmitting the uplink signals in the wireless communication system for supporting the multiple antenna transmissions according to an embodiment of the present invention comprises the steps of: receiving a PDCCH (Physical Downlink Control Channel) including uplink grant information for indicating a first rank value; precoding uplink data on the basis of the first rank value; precoding uplink control information on the basis of a second rank value; multiplexing the precoded uplink data and the uplink control information on a PUSCH (Physical Uplink Shared Channel) resource; and transmitting the multiplexed uplink data and the uplink control information.
    Type: Grant
    Filed: August 6, 2010
    Date of Patent: November 15, 2016
    Assignee: LG ELECTRONICS INC.
    Inventors: Jae Hoon Chung, Hyun Soo Ko, Min Seok Noh, Moon Il Lee
  • Patent number: 9467158
    Abstract: An apparatus for providing oscillator signals includes a first digital-to-time converter module configured to generate a first oscillator signal based on a first adapted input signal, a second digital-to-time converter module configured to generate a second oscillator signal; and a first processing module configured to generate the first adapted input signal of the first digital-to-time converter module by adding noise to a first input signal.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: October 11, 2016
    Assignee: Intel IP Corporation
    Inventors: Bernhard Raaf, Zdravko Boos, Stefan Meier
  • Patent number: 9379923
    Abstract: A method for operating a PLC system including at least one PLC modem device, in which interferences on transmission signals of the PLC system and/or on a transmission spectrum of the PLC system are detected, the interferences are caused by influences of an impedance modulating device connected to a mains used by the PLC system for communication, and, in a case such interferences are detected, frequencies on which the impedance modulating device causes interferences are selected to be notched from power line communication and/or time periods when the impedance modulating device is in a switching mode are selected to be avoided for transmitting PLC signals. A PLC modem device and a PLC system can implement the method.
    Type: Grant
    Filed: May 18, 2011
    Date of Patent: June 28, 2016
    Assignee: Sony Corporation
    Inventors: Andreas Schwager, Altfried Dilly, Ben Eitel
  • Patent number: 9369138
    Abstract: A technique for calibrating a digital-to-time converter includes an apparatus including a digital-to-time converter configured to generate an output signal based on a digital code, an input signal, and a gain calibration signal. The output signal has edges linearly delayed from corresponding edges of the input signal based on the digital code. The digital code vacillates between an evaluation code and a calibration code. The apparatus includes a reference signal generator configured to provide a delayed version of the input signal. The delay of the reference signal generator is matched to a delay of the digital-to-time converter. The apparatus includes a calibration circuit configured to generate the gain calibration signal based on the output signal and the delayed version of the input signal. The calibration code may alternate between a first calibration delay code and a second calibration delay code.
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: June 14, 2016
    Assignee: Silicon Laboratories Inc.
    Inventors: Aaron J. Caffee, Brian G. Drost
  • Patent number: 9362936
    Abstract: A digital-to-time converter includes a first node, a second node configured to receive a reference signal, and a digital-to-analog signal converter configured to couple a passive impedance to the first node. The passive impedance is selected according to the digital code. The digital-to-time converter also includes a first switch configured to selectively couple the first node to a second reference signal in response to the input signal and a comparator configured to generate the output signal based on a first signal on the first node and the reference signal on the second node. The digital-to-time converter may include a second switch configured to selectively couple the first node to a third reference signal in response to a first control signal.
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: June 7, 2016
    Assignee: Silicon Laboratories Inc.
    Inventors: Aaron J. Caffee, Brian G. Drost
  • Patent number: 9319341
    Abstract: A plurality of frames of data are transmitted over a serial interface in a manner that limits interference on the interface. This involves generating a pseudo-random number and asserting a read control signal at a moment in time, wherein a timing of the moment in time is influenced by the pseudo-random number. In response to the asserted read control signal, a frame of data is read from a data buffer. The read frame of data is then transmitted over the serial interface. A number of alternative embodiments are possible, such as embodiments in which buffer read operations are triggered based on the buffer fill level, and other embodiments in which buffer read operations are triggered by a timer. By using the pseudo-random number to influence the buffer read operations, timing coherency between the reading of frames is made low, thereby limiting interference.
    Type: Grant
    Filed: October 21, 2013
    Date of Patent: April 19, 2016
    Assignee: STMICROELECTRONICS INTERNATIONAL N.V.
    Inventors: Pierre Muller, Samuel Dubouloz
  • Patent number: 9203552
    Abstract: Certain aspects of the present disclosure relate to techniques for generating unified feedback framework for Multi User Multiple Input Multiple Output (MU-MIMO) enhancement based on indication of a preferred precoder pairings.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: December 1, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Stefan Geirhofer, Peter Gaal
  • Patent number: 9134815
    Abstract: A portable electronic device having an input device for receiving a gesture based input from a user is used to control a navigation operation of an appliance. The portable electronic device receives via the input device the gesture based input and uses one or more parameters stored in a memory of the portable electronic device and one or more characteristics associated with the gesture based input to cause the portable electronic device to transmit a navigation step command to thereby control the navigation operation of the appliance.
    Type: Grant
    Filed: May 6, 2013
    Date of Patent: September 15, 2015
    Assignee: UNIVERSAL ELECTRONICS INC.
    Inventors: Arsham Hatambeiki, Jeffrey Kohanek, Pamela Eichler Keiles, Patrick H. Hayes
  • Patent number: 9098485
    Abstract: A simulator for testing a wireless device includes at least one module capable of being connected with other modules. Each simulator module includes first and second sets of ports, combiners and a channel emulator. Each combiner provides a low insertion loss pathway between a common port and first and second ports of the combiner, and isolation between the first port and the second port of the combiner. The combiners allow interconnection of multiple modules, thereby scaling the number of devices that can be tested by the simulator at a given time.
    Type: Grant
    Filed: April 13, 2009
    Date of Patent: August 4, 2015
    Assignee: AZIMUTH SYSTEMS, INC.
    Inventor: Peter Joseph Harbour
  • Patent number: 9076366
    Abstract: In a first embodiment of the present invention, a clock recovery system is provided comprising: a phase comparator; an integrator coupled to the phase comparator; a numerically controlled oscillator coupled to the integrator; and a mixer coupled to the numerically controlled oscillator and to the phase comparator.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: July 7, 2015
    Assignee: Aquantia Corp.
    Inventors: Niranjan Talwalkar, Moshe Malkin
  • Publication number: 20150147069
    Abstract: An expurgated pulse position modulation (EPPM) technique can be used to encode information for wireless transmission. Such an EPPM technique can be compatible with a simple receiver architecture, such as including a shift register and pulse position modulation (PPM) decoder. A multi-level EPPM (MEPPM) approach can increase the available symbols in the modulation constellation and can be used to accommodate multiple users or devices concurrently. Interleaving techniques can be used such as to reduce inter-symbol interference. An optical transmitter and an optical receiver can be used, such as including using energy in a visible range of frequencies. In an example, an optical source such as including one or more light emitting diodes can provide visible light for illumination, and the EPPM technique can include using codewords specified to provide a desired dimming level when such codewords are used to intensity modulate the optical source, without perceptible flicker.
    Type: Application
    Filed: November 26, 2014
    Publication date: May 28, 2015
    Inventors: Maite Brandt-Pearce, Mohammad Noshad
  • Patent number: 8995521
    Abstract: A method and system for high density pulse density modulation is disclosed. In accordance with the present disclosure, a modulation function is split in to two band limited streams using a complementary pair of non-linear functions. More specifically, one bitstream definition contains the peaks of the original function while the other bitstream contains a soft clipping version of the original bitstream. The bitstreams are applied to a pair of switching amplifiers, and the bitstreams can be combined again to reconstruct the original function. The method in accordance with the present disclosure limits the amount of input power necessary to achieve higher output power, lowers operating voltage and improves power amplifier efficiency.
    Type: Grant
    Filed: October 30, 2012
    Date of Patent: March 31, 2015
    Assignee: LSI Corporation
    Inventors: Donald R. Laturell, Said E. Abdelli, Peter Kiss, James F. MacDonald, Ross S. Wilson, Kameran Azadet
  • Patent number: 8996124
    Abstract: A system and method involve transceiving successive first and second synchronization signals defining endpoints of a frame. A digital signal is transceived by a modulating time interval between portions of the first and second synchronization signals. A first data pulse is transceived during the frame. A relative position in the frame of the first data pulse represents a first analog signal.
    Type: Grant
    Filed: August 26, 2008
    Date of Patent: March 31, 2015
    Assignee: Data Sciences International, Inc.
    Inventors: Reid Bornhoft, Brian P. Brockway, Matt Kunz, Gregg Lichtscheidl, Brock Lindstedt, Perry A. Mills
  • Patent number: 8977667
    Abstract: A series generator divides a data series having an autocorrelation property equally into a certain number to generate subdata series. A modulator multiplies a predetermined amplitude coefficient and a unique number by each element of the subdata series, respectively, and rearranges the subdata series and synthesizes the rearranged subdata series to generate the modulation data. An IFFT unit performs an IFFT on the modulation data. The calculator divides the calculation result equally into the certain number to generate the sub calculation results, and multiplies an equalization coefficient by each element of the sub calculation results. A synthesizer generates a baseband signal by arranging the sub calculation results, so that an arranged position corresponds to a position at the time of being divided equally, and synthesizing the arranged result. A transmitter generates the transmission signal and transmits it to another apparatus via an antenna.
    Type: Grant
    Filed: January 8, 2013
    Date of Patent: March 10, 2015
    Assignee: ICOM Incorporated
    Inventor: Nobuyoshi Nishikawa
  • Patent number: 8971823
    Abstract: Techniques to enhance the performance in a wireless communication system using segments called subbands and using precoding are shown. According to one aspect, the bandwidth for transmission to an access terminal is constrained to a preferred bandwidth which is less than the bandwidth available for transmission to an access terminal and precoding information related to the subcarriers within the constrained bandwidth is provided to a transmitter. The precoding information related to the subcarriers within a constrained bandwidth provides feedback about the forward link channel properties relative to different subbands and may be fed back on a channel associated with the bandwidth.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: March 3, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Dhananjay Ashok Gore, Hemanth Sampath, Jibing Wang, Tamer Kadous, Gwendolyn D. Barriac
  • Publication number: 20150030064
    Abstract: A signal transmission system has a modulation signal converter 1 that generates a modulation signal using a Manchester code with a duty ratio of 50% in accordance with transmission data; a clock generator 6 that generates a clock with the amount of delay with respect to the rising or falling edge of the modulation signal; and a data detector 5 that generates received data by sampling the modulation signal in synchronization with the clock. Since the modulation signal converter 1 generates the modulation signal by combining the Manchester code with the duty ratio of 50%, its duty ratio is always 50% independently of the transmission data, thereby preventing the DC offset of the modulation signal on the receiving side. Accordingly, it offers an advantage of achieving good communication quality with a simple circuit configuration without producing the DC offset in the modulation signal on the receiving side.
    Type: Application
    Filed: March 19, 2013
    Publication date: January 29, 2015
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kenichi Tajima, Kenji Kawakami, Akihito Hirai, Masanobu Hiramine
  • Patent number: 8934528
    Abstract: A one-wire transmission protocol utilizes transition interval coding in which a value of a transmitted symbol is determined by comparing an interval length between the voltage transition associated with the transmitted symbol and a prior voltage transition on the communication link, to a threshold transition interval provided to the receiving device during the transmission sequence that includes the transmitted symbol. If the interval length of the symbol is below the transition interval threshold, the symbol is determined to be a first value and if the interval length of the symbol is above the transition interval threshold, the symbol is determined to be a second value. The transition interval threshold is provided in a start sequence that includes at least two transitions. The threshold transition interval width is based on one or more transition intervals determined during the start sequence.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: January 13, 2015
    Assignee: Silicon Laboratories Inc.
    Inventor: Jeffrey L. Sonntag
  • Patent number: 8929430
    Abstract: In one embodiment, a method receives a pulse width modulation signal. A value that is a function of the pulse width modulation signal is determined. The value is used to modulate a switching frequency of the pulse width modulation signal to generate a modulated pulse width modulation signal. The applied value reduces electro-magnetic interference from tones in the modulated pulse width modulation signal.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: January 6, 2015
    Assignee: Marvell World Trade Ltd.
    Inventor: Kapil Jain
  • Patent number: 8923444
    Abstract: A receiver for decoding a communication signal is disclosed. The receiver includes an input port and a filter. The input port receives the communication signal from a communication medium. The communication signal comprises a sequence of symbols. Each symbol of the symbol sequence is an analog pulse that has a leading edge of exponential shape. The exponential shape has an exponential growth parameter value that has been selected from values ?0 and ?1, which are distinct positive values. For each symbol of the symbol sequence, the exponential growth parameter value for the leading edge of the symbol has been selected based on a corresponding bit from a stream of information bits. The filter receives the communication signal from the input port and filters the communication signal to obtain an output signal. The transfer function of the filter has one or more zeros at ?0.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: December 30, 2014
    Assignee: Board of Regents, The University of Texas System
    Inventor: Robert H. Flake
  • Patent number: 8923439
    Abstract: A method of performing complementary mixing may include performing an exclusive OR (XOR) function with respect to an I-channel symbol based on an oscillator signal to produce an I-channel output signal with bits that alternate between the I-channel symbol and a complement of the I-channel symbol in response to the oscillator signal rising and falling. The method may also include performing the XOR function with respect to a Q-channel symbol based on the oscillator signal to produce a Q-channel output signal with bits that alternate between the Q-channel symbol and a complement of the Q-channel symbol in response to the oscillator signal. Further, the method may include combining the I-channel output signal and the Q-channel output signal based on adding operations performed with respect to an I-channel extra bit signal, a Q-channel extra bit signal, the I-channel output signal, and the Q-channel output signal to generate a complementary mixed signal.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: December 30, 2014
    Assignee: Intel IP Corporation
    Inventors: Chuanzhao Yu, Mark Kirschenmann
  • Patent number: 8891480
    Abstract: Systems and methods are described to supply positioning reference signal (PRS) in a telecommunication system. A base station supplies a PRS sequence according at least to a time-frequency pattern of modulation symbols, wherein the time-frequency pattern assigns a modulation symbol to each frequency tone in a block of time-frequency resources allocated to transmit PRS. The base station associates a modulation symbol in the time-frequency pattern with a reference symbol in the PRS sequence through a mapping that represents the time-frequency pattern. The PRS sequence is conveyed to user equipment through delivery of a set of modulation symbols established through the mapping. Different time-frequency patterns can be exploited based on time-structure of a radio sub-frame. The user equipment receives the PRS sequence according to at least the time-frequency pattern of modulation symbols and utilizes at least the PRS sequence as part of a process to produce a location estimate.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: November 18, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Raja Sekhar Bachu, Ashwin Sampath, Aamod Dinkar Khandekar
  • Patent number: 8891355
    Abstract: A communication device is provided for transmitting information incorporated into at least one message packet. The device includes components for encoding the message packet as a signal, which is afterwards transmitted and analyzed. The encoder assigns the message packet to correspond to a specific pulse width. The transmitter sends the signal across a channel. The processor parses the signal as corresponding to the specific pulse width subsequently decoded to obtain the message packet.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: November 18, 2014
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: William M. Huttle
  • Publication number: 20140328381
    Abstract: The present invention discloses an electronic device using pulse density modulation for communication, comprising: a pulse density modulation interface; a first circuit to output a clock signal and a data signal through the pulse density modulation interface; and a second circuit to receive the clock and data signals and thereby determine whether the level change times of the data signal reach a predetermined threshold while the clock signal remains unchanged, so as to verify whether the clock and data signals satisfy a start protocol. In an embodiment of the present invention, the above-mentioned predetermined threshold is equal to or more than three.
    Type: Application
    Filed: March 12, 2014
    Publication date: November 6, 2014
    Applicant: REALTEK SEMICONDUCTOR CORPORATION
    Inventor: SHENG-NAN CHIU
  • Patent number: 8873616
    Abstract: A pulse width modulator has a first clock source providing a clock signal to a set input of an output controller configured to set a pulse width output signal and having a reset input to reset the pulse width output signal. A duty cycle control unit is coupled with the reset input of the output controller, wherein the duty cycle control unit has a numerical controlled oscillator (NCO) being coupled with a register and configured to provide for a direct digital synthesis to produce a specified frequency according to a value set in the register. Furthermore, logic is provided for receiving a signal from a second clock source and the pulse width output signal to trigger the numerical controlled oscillator.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: October 28, 2014
    Assignee: Microchip Technology Incorporated
    Inventors: Michael Garbutt, Jacobus Albertus van Eeden, David Martin
  • Patent number: 8867591
    Abstract: A discrete digital transceiver includes a receiver sample and hold module, a discrete digital receiver conversion module, a transmitter sample and hold module, a discrete digital transmitter conversion module, clock generation module, and a processing module. The receiver sample and hold module samples and holds an inbound wireless signal in accordance with a receiver S&H clock signal. The discrete digital receiver conversion module converts the receiver frequency domain sample pulse train into an inbound baseband signal. The transmitter sample and hold module samples and holds an outbound signal to produce a transmitter frequency domain sample pulse train. The discrete digital transmitter conversion module converts a transmitter frequency domain sample pulse train into the outbound wireless signal. The clock generation module generates S&H clock signals in accordance with a control signal. The processing module generates the control signal such that the S&H clock signals are shifted.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: October 21, 2014
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza (Reza) Rofougaran, Hooman Darabi
  • Patent number: 8867657
    Abstract: A first transmitter transmits symbols. The leading edge of each symbol has the form Djexp{?jt}, where Dj is real, where ?j is selected from N possible values based on a current group of bits. The receiver has N filters whose transfer functions correspond respectively to the N possible values. The filter outputs are used to recover the group of bits. A second transmitter transmits an exponential symbol or a zero symbol depending on a current bit to be transmitted. The zero symbol has zero amplitude over the symbol period. The corresponding receiver applies threshold detection to estimate the transmitted bits. A third transmitter transmits a sequence of analog pulses with known interpulse time separation(s). The pulse sequence reflects from a moving object. A receiver captures the reflected pulse sequence. The interpulse separation(s) of the reflect pulse sequence is used to determine the radial velocity of the object.
    Type: Grant
    Filed: February 17, 2014
    Date of Patent: October 21, 2014
    Assignee: Board of Regents, The University of Texas System
    Inventor: Robert H. Flake
  • Patent number: 8861584
    Abstract: A noise discriminator circuit and a noise discrimination method in a burst mode receiver is configured to determine the validity of an incoming burst signal by analyzing the timing of the signal edges of incoming signal to look for a time duration conforming to the preamble data bits of a valid burst signal. In one embodiment, the noise discriminator circuit and method analyze the time duration between signal edges of the same pulse of an incoming signal. In another embodiment, the noise discriminator circuit and method analyze the time duration between a first set of pulses of an incoming signal and the time duration between signal edges of a second set of pulses of the incoming signal. When the time durations are within a given time range relating to a predetermined timing separation of a valid burst signal, the incoming signal is validated as a valid burst signal.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: October 14, 2014
    Assignee: Micrel, Inc.
    Inventors: George W. Brown, Thomas S. Wong, Bernd Neumann
  • Publication number: 20140301435
    Abstract: A communications system comprising a signal transmission arrangement for outputting a first signal for transmission, a first controller operable to control transmission of the first signal such that the transmitted signal takes a pulsed form including a plurality of first periods in which the first signal is transmitted separated by second periods in which the first signal is not transmitted, a radio signal receiver arrangement including or forming a bandpass filter and arranged to receive a second signal, and a second controller operable such that during a plurality of third periods the second signal is processed by at least part of the radio receiver arrangement, the third periods being separated by fourth periods in which the radio receiver arrangement does not process the second signal, wherein the first and second controllers are synchronised such that the second periods are synchronised with the third periods, at the radio signal receiver arrangement, such that the pulsed signal received by the receiver
    Type: Application
    Filed: April 4, 2014
    Publication date: October 9, 2014
    Applicant: Kirintec Limited
    Inventor: Roy Peter Peers-Smith
  • Patent number: 8855187
    Abstract: A signal processing method for enhancing the dynamic range of a signal is disclosed. The method comprises: a) forming an attenuated signal from an input signal; b) filtering each of the input and the attenuated signals such that the sum of their bandwidths is less than or equal to the bandwidth of a transmission channel; c) modulating a first one of the filtered input signal and the filtered attenuated signal, whereby the filtered input signal and the filtered attenuated signal occupy respective non-overlapping frequency ranges within the bandwidth of the transmission channel; and d) combining the modulated signal with the second one of the filtered input signal and the filtered attenuated signal to form a composite output signal.
    Type: Grant
    Filed: January 9, 2012
    Date of Patent: October 7, 2014
    Assignee: NXP B.V.
    Inventor: Friedrich Reining
  • Patent number: 8837574
    Abstract: An identification method for a data Sk is disclosed which includes; a) construction of a chronological sequence {T1; . . . ; Ti; . . . ; TN} of times of arrival Ti of pulses or a block of successive pulses, b) calculation of a value of similarity between this sequence {T1; . . . ; Ti; . . . ; TN} and a predetermined chronological sequence {TREFk1; . . . ; TREFkj; . . . ; TREFkM} of times of arrival coding the data Sk for several time offsets Ol between the sequence {T1; . . . ; Ti; . . . ; TN} and the sequence {TREFk1; . . . ; TREFkj; . . . ; TREFkM}, c) identification of the data Sk in the series {T1; . . . ; Ti; . . . ; TN} if the calculated value of similarity for one of the time offsets Ol exceeds a predetermined threshold.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: September 16, 2014
    Assignee: Ecole Polytechnique Federale De Lausanne (EPFL)
    Inventors: Pierre-André Farine, Cyril Botteron, Roman Merz
  • Patent number: 8830919
    Abstract: A time tracking method is provided for channel estimation of a mobile communication receiver and a related channel estimation apparatus is provided. The channel estimation apparatus includes a channel estimation control unit for analyzing and outputting a delay profile of a multipath channel by using a channel estimation value of each multi-tap, a tracking mode control unit for calculating a distance between an earliest tap and a preset margin tap by using the delay profile analysis results, and for generating and outputting a hopping tracking control signal for tracking a position of the earliest tap to a position of the margin tap at a time when the determined distance is greater than a preset hopping threshold value, and a hopping tracking mode execution unit for receiving the hopping tracking control signal and for shifting the position of the earliest tap to the position of the margin tap at a time.
    Type: Grant
    Filed: June 3, 2010
    Date of Patent: September 9, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jae Hong Lee, Young Min Ki
  • Patent number: 8831132
    Abstract: A receiver device for receiving a signal that comprises one or more periodic features, the receiver device comprising: a detector configured to listen to the signal during at least a first reception phase, and to be triggered when a feature of the signal is received so as to determine the time of reception of that feature; and a receiver configured to process time-limited segments of the signal so as to derive information from features of the signal received during those segments, the receiver being configured to be dependent on the detector such that after the first reception phase the timings of the time-limited segments processed by the receiver are dependent on the time of reception determined by the detector.
    Type: Grant
    Filed: July 2, 2010
    Date of Patent: September 9, 2014
    Assignee: Ubisense Limited
    Inventor: Andrew Martin Robert Ward
  • Patent number: 8811467
    Abstract: A finite sequence of code values is formed, and can be used for example in communications or remote sensing. A code value in said finite sequence of code values has a validity period specific to that code value. There are code values of different validity periods in said finite sequence of code values. Each of said validity periods is longer than or equal to a predetermined minimum baud length.
    Type: Grant
    Filed: June 28, 2010
    Date of Patent: August 19, 2014
    Assignee: Fracticode Ltd.
    Inventor: Juha Vierinen
  • Patent number: 8804811
    Abstract: The method for compressive sensing (CS) and reconstruction of ultra-wideband (UWB) channels includes building four practically-based dictionaries related to the antenna angles of transmission and angles of arrival that enhance the sparsity of UWB signals. The dictionaries account for the practical effects of the channel, such as pulse dispersion and the unavoidable effects of the antenna. Utilizing the practically-based dictionaries CS is able to reconstruct the UWB signals more efficiently with reasonable complexity. In addition to waveform reconstruction, the dictionaries are used for channel estimation. The CS method can be used with either a single-shot full profile correlator or a Rake receiver. The Rake receiver employs CS in adjusting its parameters to take advantage of the energy available in the strongest propagation paths.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: August 12, 2014
    Assignee: King Fahd University of Petroleum and Minerals
    Inventors: Ali Hussein Muqaibel, Mohammad Tamim Alkhodary
  • Patent number: 8804810
    Abstract: A method for synthesizing a wideband signal includes: generating a plurality of narrowband radio frequency signals; and constructively superimposing the narrowband radio frequency signals. In one aspect, this includes determining the delays for a plurality of constituent narrowband signals for use in synthesizing a wideband signal. The delay determination is software implemented, and thus may be embodied in software encoded on a program storage medium and a computing apparatus programmed to perform that method. An apparatus for synthesizing a wideband signal includes: a pulsed power source; a plurality of narrow band radio frequency source modules capable of receiving a signal form the pulse power source and outputting constituent narrowband radio frequency signal; a combiner for combining the constituent narrowband radio frequency signals after they have been uniquely delayed into a synthetic wideband radio frequency signal.
    Type: Grant
    Filed: October 9, 2007
    Date of Patent: August 12, 2014
    Assignee: Lockheed Martin Corporation
    Inventors: Steve E. Calico, David S. Hidinger
  • Patent number: 8787440
    Abstract: Adverse effects associated with collisions in a wireless communication system are mitigated by defining one or more values for receive data. Here, data that is expected to be received during a data transmission may be set to a defined value. In some cases the defined value is a predefined value (e.g., zero or some other value). In some cases the defined value is based on noise and/or signals levels in the system. In some implementations a device may define receive data values for a period of time during which data is expected to be received and during which a transmission occurs. In some aspects a hybrid on-off keying scheme is employed to determine received data values.
    Type: Grant
    Filed: January 27, 2009
    Date of Patent: July 22, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Jun Shi, David Jonathan Julian, Amal Ekbal
  • Patent number: 8787499
    Abstract: A method for a wireless communication system is provided. The method includes isolating a set of pilot signals, where the pilot signals are associated with multiple base stations or multiple sectors of a single base station. This includes nulling a subset of the pilot signals to mitigate co-channel interference and to perform channel estimation in accordance with at least one of the pilot signals.
    Type: Grant
    Filed: March 26, 2008
    Date of Patent: July 22, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Peter Gaal, Tao Luo, Yongbin Wei
  • Patent number: 8774263
    Abstract: A transmitter (TX) for transmitting a pulse density modulated signal comprises means (SDM) for generating a pulse density modulated input signal (SI) and an encoder (ENC). The encoder (ENC) comprises a first input for receiving the pulse density modulated input signal (SI) and a second input for receiving additional information (AI) comprising at least one data bit. The encoder (ENC) is configured to generate a multi-bit telegram (TG) on the basis of the additional information (AI), the telegram (TG) comprising a predefined bit-sequence, and to replace an appropriate number of consecutive bits of the input signal (SI) with the telegram (TG) in order to generate an output signal (SO).
    Type: Grant
    Filed: February 13, 2013
    Date of Patent: July 8, 2014
    Assignee: ams AGe
    Inventors: Richard Forsyth, Thomas Fröhlich, Matthias Steiner
  • Patent number: 8767815
    Abstract: One embodiment is directed towards an RF receiver for receiving a pulse-position modulated signal transmitted with a 1090 MHz ADS-B transmitter, wherein the pulse-position modulated signal is preceded by a preamble of 4 pulses that conform to an ADS-B protocol. The receiver can filter a digital sample stream with a filter matched to pulses in an earlier half of an expected preamble sequence to produce a first matched filter output sample stream. The receiver can also filter the digital sample stream with a filter matched to a pulses in a latter half of the expected preamble sequence to produce a second matched filter output sample stream. The receiver can determine that a sequence of pulses match the expected preamble sequence based on when the first matched filter output sample stream and the second matched filter output sample stream are above a minimum trigger level at the same time.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: July 1, 2014
    Assignee: Honeywell International Inc.
    Inventors: Alfonso Malaga, Jamal Haque, Andrew White