Phase Shift Keying Patents (Class 375/279)
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Patent number: 12244404Abstract: A wireless communication system includes a first wireless communication node for transmitting a data signal that is sent to a second wireless communication node by skywave propagation over at least two different data transmission paths. The first data transmission path includes at least one reflection point where the data signal is reflected by the atmosphere and the second data transmission path includes more reflection points than the first data transmission path. The data signal that travelled along the first data transmission path is decoded before the data signal that travelled along the second data transmission path.Type: GrantFiled: June 23, 2023Date of Patent: March 4, 2025Assignee: Skywave Networks LLCInventor: Kevin J. Babich
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Patent number: 12176891Abstract: A sensor device includes an output driver configured to: adjust a first time interval of the output signal between a first signal edge of a first type and a first signal edge of a second type based on a first reference value; adjust a second time interval of the output signal between the first signal edge of the second type and a second signal edge of the first type based on a second reference value; adjust a third time interval of the output signal between the second signal edge of the first type and a second signal edge of the second type based on a first data value; and adjust a fourth time interval of the output signal between the second signal edge of the second type and a third signal edge of the first type based on a second data value.Type: GrantFiled: December 27, 2021Date of Patent: December 24, 2024Assignee: Infineon Technologies AGInventors: Dirk Hammerschmidt, Michael Strasser
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Patent number: 12137012Abstract: A method includes obtaining an in-phase (I) input signal and a quadrature (Q) input signal at a quadrature modulator. The method also includes performing constant envelope bi-phase shift keying (CE-BPSK) modulation using the quadrature modulator to generate a modulated output signal. The modulated output signal includes a CE-BPSK modulated waveform containing phase reversals, and the CE-BPSK modulated waveform has a substantially-constant amplitude during the phase reversals.Type: GrantFiled: July 13, 2022Date of Patent: November 5, 2024Assignee: Raytheon CompanyInventor: Macdonald J. Andrews
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Patent number: 11996882Abstract: An impulse wireless communication system includes an oscillation signal generator that generates a plurality of oscillation signals having a delay interval with each other and having the same phase and amplitude or different phases and amplitudes, an envelope signal generator that extracts a sync signal and a data signal making up communication signal data and generates an envelope signal for the sync signal and an envelope signal for the data signal, a signal synthesizer that synthesizes the plurality of oscillation signals with the envelope signals, an envelope signal extractor that extracts a plurality of modulation envelope signals from the impulse signal, an amplitude phase determiner that determines the phase and the amplitude in the plurality of modulation envelope signals based on the plurality of oscillation signals, and a calculator that extracts the envelope signals from the plurality of modulation envelope signals based on the phase and the amplitude.Type: GrantFiled: November 22, 2022Date of Patent: May 28, 2024Assignee: UIF (University Industry Foundation), Yonsei UniversityInventors: Tae Wook Kim, Junyoung Jang
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Patent number: 11991024Abstract: A method for transmitting and receiving a signal in a wireless communication system and an apparatus therefor are disclosed in the present disclosure. Specifically, a method for transmitting and receiving a signal by a receiving apparatus in a wireless communication system, according to an embodiment of the present disclosure, may comprise the steps of: continuously receiving a plurality of reference signals from a transmitting apparatus; sorting the ranges of channel phases on the basis of the plurality of reference signals; grouping the ranges of the channel phases into two or more groups; and receiving a data signal from the transmitting apparatus.Type: GrantFiled: July 3, 2019Date of Patent: May 21, 2024Assignee: LG ELECTRONICS INC.Inventors: Sangrim Lee, Byounghoon Kim
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Patent number: 11869516Abstract: A voice processing method is provided for a terminal. The method includes: performing voice speed detection on a voice obtained from a voice source, to obtain a voice speed value of the voice; obtaining a forward error correction (FEC) redundancy; adjusting the FEC redundancy according to the voice speed value to obtain a target redundancy; performing voice encoding on the voice to obtain a voice encoded packet; performing FEC encoding on the voice encoded packet according to the target redundancy to obtain a redundancy packet; and transmitting the redundancy packet and the voice encoded packet to a receiving end.Type: GrantFiled: November 8, 2021Date of Patent: January 9, 2024Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITEDInventor: Junbin Liang
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Patent number: 11728887Abstract: A wireless communication system includes a first wireless communication node for transmitting a data signal that is sent to a second wireless communication node by skywave propagation over at least two different data transmission paths. The first data transmission path includes at least one reflection point where the data signal is reflected by the atmosphere and the second data transmission path includes more reflection points than the first data transmission path. The data signal that travelled along the first data transmission path is decoded before the data signal that travelled along the second data transmission path.Type: GrantFiled: September 10, 2021Date of Patent: August 15, 2023Assignee: Skywave Networks LLCInventor: Kevin J. Babich
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Patent number: 11665042Abstract: Included are a demodulation unit 20 that demodulates a received OFDM modulation signal to acquire a demodulated constellation signal, an ideal constellation signal generation unit 312 that generates an ideal constellation signal from the demodulated constellation signal, a data extraction unit 313 that extracts signal data included in some symbol sections including a known reference symbol, among all symbol sections, from the demodulated constellation signal and the ideal constellation signal, a phase error calculation unit 314 that calculates the phase error of the demodulated constellation signal for the ideal constellation signal, with respect to the extracted signal data, a phase error characteristics estimation unit 315 that estimates the frequency characteristics of the phase error, and a phase error correction unit 316 that corrects the phase error of the demodulated constellation signal, based on the frequency characteristics of the phase error.Type: GrantFiled: July 7, 2022Date of Patent: May 30, 2023Assignee: ANRITSU CORPORATIONInventors: Atsuki Morita, Mark Joseph Aquino Isip
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Patent number: 11665034Abstract: A Radio Frequency (RF) receiver may include a lower-order phase shift keying (PSK) demodulation circuit configured to generate at least one locking parameter when performing a lower-order PSK demodulation of an RF receive signal having an interfering PSK signal component. A higher-order PSK demodulation circuit has a higher order than the lower-order PSK demodulation circuit, and locks to the RF receive signal using the at least one locking parameter from the lower-order PSK demodulation circuit. The higher-order PSK demodulation circuit performs the higher-order PSK demodulation of the RF receive signal based upon locking to the RF receive signal to determine the interfering PSK signal component.Type: GrantFiled: November 30, 2021Date of Patent: May 30, 2023Assignee: L3HARRIS TECHNOLOGIES, INC.Inventors: L. Andrew Gibson, Alexander Kimani, Lance R. Lindsay, Christian Schlegel, Christopher L. Brown
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Patent number: 11606234Abstract: Systems, apparatuses and methods described herein provide a method for padding a signal extension of orthogonal frequency-division multiplexing (OFDM) symbols. A transceiver may obtain a plurality of data symbols for transmission, and determine that a number of information bits for a last symbol of the plurality of data symbols is not an integer value. A special padding rule may be applied to add padding bits to the last symbol. A number of coded bits for the last symbol may be determined when the number of information bits for the last symbol has changed, and the plurality of data symbols for data transmission may be encoded based on the determined number of coded bits for the last symbol.Type: GrantFiled: March 8, 2021Date of Patent: March 14, 2023Assignee: NXP USA, INC.Inventors: Yakun Sun, Hongyuan Zhang, Sudhir Srinivasa, Rui Cao
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Patent number: 11546858Abstract: Methods, systems, and devices for wireless communications are described that provide for a transmission of uplink control information (UCI) from a user equipment (UE) to a base station using uplink shared channel resources in the absence of other uplink shared channel data. Based in the UCI and uplink control parameters, the UE may determine an uplink power for transmission of the UCI based at least in part on a spectrum efficiency or a number of bits per resource element (BPRE) for the UCI.Type: GrantFiled: March 21, 2019Date of Patent: January 3, 2023Assignee: QUALCOMM IncorporatedInventors: Yi Huang, Xiao Feng Wang, Peter Gaal
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Patent number: 11469790Abstract: A direct digital synthesis transmitter that uses a programmable digital circuit to generate a digital signal representing at least one radio frequency signal, the generated signal is filtered, amplified by an amplifier, and provided to a transmission antenna without upconversion. The transmitter generating the digital signal at a desired output frequency range such that a frequency upconverter is not needed to produce signals in the desired radio frequency range.Type: GrantFiled: June 30, 2020Date of Patent: October 11, 2022Assignee: KBR Wyle Services, LLCInventors: Gregory William Gerten, Gary Louis Green, Rachel Eunice Reed, Jared T. Emerson, Sean Joseph Stasiak, Steven John Billman
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Patent number: 11372084Abstract: Methods and apparatus for generating a target signal with desired phase shift information. In embodiments, a system receives an input target signal having a first frequency and combines the input target signal with an oscillator signal to generate a first output signal having a second frequency. The oscillator signal is generated using a digital component that imparts phase-shift information into the oscillator signal. The first output signal is combined with a fixed frequency oscillator signal to generate a second output signal corresponding to a signal reflected from a target.Type: GrantFiled: November 13, 2019Date of Patent: June 28, 2022Assignee: Raytheon CompanyInventors: John E. Drapeau, Michael R. Beylor, Ryan D. Dewitt
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Patent number: 11088880Abstract: A communication system comprises a transmitter and a receiver that communicate differential phase modulated data over a wireline channel pair. The transmitter encodes data symbols by generating first and second data signals with differentially phase shifted signal transitions with respect to one another. The receiver receives the first data signal and the second data signal and samples the first data signal based on a signal transition timing of the second data signal to generate a first output data symbol. The receiver furthermore samples the second data signal based on signal transition timing of the first data signal to generate a second output data symbol.Type: GrantFiled: April 30, 2020Date of Patent: August 10, 2021Assignee: Rambus Inc.Inventors: Masum Hossain, Richelle L. Smith, Carl W. Werner
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Patent number: 10742456Abstract: The present invention provides a signal modulation method. The method includes: generating a transmit signal pulse waveform, where a width of the pulse waveform is ?, each pulse waveform is associated with n symbols (n>1), a width of each symbol is ??, and ?? = ? n ; performing an operation on every n consecutive symbols in a to-be-sent symbol flow and the pulse waveform according to a preset operation manner, to generate an associated signal of the symbols and the pulse waveform; and sending the associated signal by using a transmission channel. The present invention helps improve spectral efficiency of a system. In addition, symbols are mutually constrained based on a correlation between the symbols, and information symbols are scattered to a plurality of symbols, thereby helping improve a capability of resisting noise and attenuation by a signal.Type: GrantFiled: January 24, 2019Date of Patent: August 11, 2020Assignee: SHEN ZHEN KUANG-CHI HEZHONG TECHNOLOGY LTDInventors: Ruopeng Liu, Chunlin Ji, Changwei Lv, Shasha Zhang
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Patent number: 10516506Abstract: In one aspect, a wireless device receives a first data transmission from a base station in a first subframe interval and transmits HARQ feedback and/or CSI to the base station in a subsequent subframe interval, within a duration that is less than a maximum transmission duration that is possible within the subsequent subframe interval. In another aspect, a base station transmits a first data transmission to a wireless device in a first subframe interval and receives HARQ feedback and/or CSI from the wireless device in a subsequent subframe interval, within a duration that is less than a maximum transmission duration that is possible within the subsequent subframe interval.Type: GrantFiled: July 12, 2018Date of Patent: December 24, 2019Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Helka-Liina Määttanen, Mattias Andersson, Stefan Parkvall, Per Synnergren, Stefan Wager, Hanzhi Zhang
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Patent number: 10284325Abstract: An apparatus for orbital angular momentum (OAM) mode combination and an antenna apparatus for multi-mode generation are provided. The apparatus for OAM mode combination includes three input ports configured to receive independent OAM mode signals, four output ports configured to output OAM mode signals with the same or different phase delays; and a circuit element configured to simultaneously combine or distribute the OAM mode signals by controlling phases of output signals output through the four output ports to be different depending on the OAM mode signals received through the input ports.Type: GrantFiled: August 30, 2016Date of Patent: May 7, 2019Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Min Soo Kang, Kwang Seon Kim, Myung Sun Song, Woo Jin Byun, Bong Su Kim
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Patent number: 10158382Abstract: Apparatuses and methods for power amplification and signal transmission using complex delta-sigma modulation are disclosed. In one embodiment, a complex delta sigma modulator unit comprising a complex polar quantizer within an integrator loop is disclosed. The complex polar quantizer quantizes the envelope of a complex integrated signal and produces a complex quantized output signal of substantially constant envelope. The complex quantized output signal is used in deriving a complex feedback signal within the integrator loop of the complex DSM. The complex quantized output signal may be used in driving a power amplifier substantially at saturation. In some embodiments, an adjacent channel power ratio (ACPR) enhancement technique is used to reduce the quantization noise in the complex quantized output signal.Type: GrantFiled: June 23, 2014Date of Patent: December 18, 2018Assignee: Telefonaktiebolaget LM Ericsson (Publ)Inventors: Mojtaba Ebrahimi, Mohamed Helaoui, Fadhel Ghannouchi, Fahmi Elsayed, Bradley John Morris
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Patent number: 10050747Abstract: In one aspect, a wireless device receives a first data transmission from a base station in a first subframe interval and transmits HARQ feedback and/or CSI to the base station in a subsequent subframe interval, within a duration that is less than a maximum transmission duration that is possible within the subsequent subframe interval. In another aspect, a base station transmits a first data transmission to a wireless device in a first subframe interval and receives HARQ feedback and/or CSI from the wireless device in a subsequent subframe interval, within a duration that is less than a maximum transmission duration that is possible within the subsequent subframe interval.Type: GrantFiled: August 29, 2017Date of Patent: August 14, 2018Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Helka-Liina Määttanen, Mattias Andersson, Stefan Parkvall, Per Synnergren, Stefan Wager, Hanzhi Zhang
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Patent number: 10031547Abstract: Methods, apparatus, and computer program products are described, which provide a mechanism that enables data to be written into registers of a slave device without a free-running clock, while facilitating an efficient sleep and wakeup mechanism for slave devices. A receiver device may receive a plurality of symbols over a shared bus, extract a receive clock signal embedded in symbol-to-symbol transitions of the plurality of symbols, convert the plurality of symbols into a transition number, convert the transition number into data bits, and store at least a portion of the data bits into one or more registers using only the receive clock signal. The receiver device may start a down counter upon detection of a first cycle of the clock signal, trigger a marker when the down counter reaches a pre-defined value, and use the marker to store at least a portion of the data bits into registers.Type: GrantFiled: December 16, 2014Date of Patent: July 24, 2018Assignee: QUALCOMM IncorporatedInventor: Shoichiro Sengoku
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Patent number: 9860785Abstract: Systems, methods, and devices for communicating frames having a plurality of types are described herein. In some aspects, the frames include a compressed frame, such as a compressed management frame or a compressed control frame. In some aspects, a method of communicating in a wireless network includes generating a control frame including an identifier, the identifier comprising a portion of a frame check sequence and a service field of a frame that elicited the control frame. The method further includes transmitting the control frame.Type: GrantFiled: May 3, 2013Date of Patent: January 2, 2018Assignee: QUALCOMM, IncorporatedInventors: Alfred Asterjadhi, Simone Merlin, Maarten Menzo Wentink, Santosh Paul Abraham
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Patent number: 9838069Abstract: A radio frequency front end module is provided for a high power capability and a high signal band selectivity. The front end module includes an external filter and an integrated circuit coupled with the external filter via two external filter leads. The integrated circuit includes a transmit-receive switch, a power amplifier and a low noise amplifier. The transmit-receive switch alternates between coupling an antenna port to a transmit port and coupling the antenna port to a receive port. The power amplifier amplifies a modulated radio frequency signal. The low noise amplifier amplifies a received radio frequency signal when the antenna port is coupled to the receive port. The external filter can be replaced to adapt to various requirements of signal frequency bands, without the need of modifying the layout of the integrated circuit.Type: GrantFiled: May 28, 2014Date of Patent: December 5, 2017Assignee: NETGEAR, INC.Inventor: Joseph Amalan Arul Emmanuel
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Patent number: 9699727Abstract: Methods, apparatuses, and computer readable media are disclosed to signal a packet configuration. A HEW device to signal a packet configuration may include circuitry. The circuitry may be configured to generate a HE packet comprising a legacy signal field (L-SIG) followed by one or more HE signal fields and include in the L-SIG the packet configuration of the HE packet to signal to a second HEW device. The circuitry may configure a length field of the L-SIG to be a one or two modulo of three (MOD 3) to indicate the HE packet. The length field of the L-SIG may indicate that the HE packet includes a portion that has a one-quarter size subcarrier. The circuitry may set the length field of the L-SIG to be 1 mod 3 to indicate a first type of HE packet and to be 2 mod 3 to indicate a second type of HE packet.Type: GrantFiled: December 17, 2014Date of Patent: July 4, 2017Assignee: Intel IP CorporationInventors: Thomas J. Kenney, Robert J. Stacey, Eldad Perahia, Shahrnaz Azizi
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Patent number: 9665421Abstract: A bit storage device, integrated circuit, and method are provided. The bit storage device comprises registers to store an actual value, an inverse value, a differential actual value, and a differential inverse value, a validation circuit including validation inputs coupled to outputs of the registers and including a validity output to provide a validity indication, and a write circuit including write circuit inputs coupled to the registers, the write circuit configured to cause, at a first clock edge, the first register to store the actual value and either the second register to store the inverse value or the fourth register to store the differential inverse value, and, at a second clock edge, the third register to store the differential actual value and the other of the second register and the fourth register to store to store the inverse value or the differential inverse value, respectively.Type: GrantFiled: September 1, 2015Date of Patent: May 30, 2017Assignee: NXP USA, Inc.Inventors: Michael Rohleder, Stefan Doll, Peter Limmer
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Patent number: 9614484Abstract: Embodiments of the present invention include a method and system for control of a multiple-input-single output (MISO) device. For example, the method includes partitioning a waveform constellation space into a plurality of regions, where each region of the plurality of regions is associated with one or more control functions of the MISO device. The method also includes transitioning the MISO device between a plurality of classes of operation based on the one or more control functions.Type: GrantFiled: May 13, 2014Date of Patent: April 4, 2017Assignee: PARKERVISION, INC.Inventors: David F. Sorrells, Gregory S. Rawlins
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Patent number: 9565038Abstract: An electronic receiver may generate a differential detection sequence based on a received symbol sequence and based on a m-symbol delayed version of the received symbol sequence, where m is an integer greater than 1. The particular differential detection sequence may be a result of an element-by-element multiplication of the particular received symbol sequence and the conjugate of an m-symbol delayed version of the particular received symbol sequence. The receiver may calculate differential decision metrics based on the differential detection sequence and based on a set of differential symbol sequences generated from the set of possible transmitted symbol sequences. The receiver may generate a decision as to which of a set of possible transmitted symbol sequences resulted in the received symbol sequence, where the decision is based on the differential decision metrics and the set of possible transmitted symbols sequences.Type: GrantFiled: January 26, 2016Date of Patent: February 7, 2017Assignee: MAXLINEAR, INC.Inventors: Ioannis Spyropoulos, Anand Anandakumar
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Patent number: 9334723Abstract: Disclosed is an apparatus, method, and program product for steering a drill bit within a pay zone in a lateral well. The method includes receiving acoustic signature data from an acoustic signal analyzing apparatus. The acoustic signature data includes an amplitude spectrum and one or more acoustic characteristics evaluated from an acoustic signal provided by a sensor attached to at least one of a drive shaft and a packing box of a drill rig, and generated in real-time as a result of rotational contact of the drill bit with encountered rock in the lateral well during drilling. The method further includes comparing the received real-time acoustic signature data to predetermined acoustic signatures determined for a plurality of rock samples, and identifying a lithology type of the rock being encountered by the drill bit based on the comparison.Type: GrantFiled: November 15, 2012Date of Patent: May 10, 2016Assignee: SAUDI ARABIAN OIL COMPANYInventor: Yunlai Yang
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Patent number: 9325175Abstract: A phase angle drift method for loss of mains/grid protection is disclosed. According to one aspect, an accumulated electrical phase angle drift derived from the difference between the current measured local frequency and the estimated frequency using historical data is compared to an angle threshold. An estimated grid frequency may be calculated based on the historical delay, and the window, over which the estimated frequency is calculated. An addition/subtraction of a phase angle offset value is calculated for a half cycle is performed when the frequency difference between the estimated frequency fnest and the measured frequency fn is greater or equal to a first determined value.Type: GrantFiled: September 30, 2009Date of Patent: April 26, 2016Assignees: Alstom Technology Ltd., Schneider Electric Energy UK Ltd.Inventors: Ryan M. Tumilty, Adam Dysko, Graeme Burt
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Patent number: 9122293Abstract: A transient response accelerated (TRA) low dropout (LDO) regulator has an error amplifier having a feedback input, and a reference input configured to receive a reference voltage, and an output that controls a pass gate. The pass gate output voltage is applied to the feedback input. A transient response accelerator (TRA) circuit detects a rapid voltage drop on the pass gate output and, in response, applies a pulse control that rapidly lowers the resistance of the pass gate.Type: GrantFiled: March 7, 2013Date of Patent: September 1, 2015Assignee: QUALCOMM IncorporatedInventors: Burt L. Price, Dhaval R. Shah, Yeshwant Nagaraj Kolla
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Patent number: 9059790Abstract: The present invention provides an ultra-wide band (UWB) system and method. In one embodiment, a transmitter of a low duty cycled ultra wide band (UWB) system includes a differential spreading encoder for encoding a phase of a bit sequence based on a reference bit sequence. The transmitter also includes a pulse generator for generating a number of pulses associated the bit sequence using the encoded phase of the bit sequence, where the number of pulses is equal to a length of the bit sequence. Moreover, the transmitter includes a DMPSK modulator for generating a modulated signal through modulating the number of pulses using a phase of a differential data symbol.Type: GrantFiled: January 11, 2011Date of Patent: June 16, 2015Assignee: Samsung Electronics Co., Ltd.Inventors: Kiran Bynam, Giriraj Goyal, Thenmozhi Arunan
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Publication number: 20150146815Abstract: A device for generating Orbital Angular Momentum (OAM) modes for radio communications. The device is designed to receive one or more input digital signals, each of which has a respective sampling period which is a respective multiple of a given sampling period, and occupies a frequency bandwidth which is a respective fraction of a given available frequency bandwidth. The device is operable to apply, to each input digital signal, a respective space modulation associated with a respective OAM mode having a respective topological charge to generate a corresponding digital signal carrying the respective OAM mode. The device is configured to apply, to each input digital signal, the respective space modulation by interpolating said input digital signal and phase-modulating the interpolated input digital signal so as to generate a corresponding phase-modulated digital signal carrying the respective OAM mode, having the given sampling period, and occupying the given available frequency bandwidth.Type: ApplicationFiled: November 28, 2012Publication date: May 28, 2015Applicant: EUTELSAT SAInventors: Giuliano Berretta, Jacques Dutronc
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Patent number: 9019030Abstract: A memristor-based emulator including a memristor circuit for use in digital modulation that includes a first current feedback operational amplifier (CFOA) having multiple terminals in communication with a capacitor Cd and in further communication with a resistor Ri. A second CFOA having multiple terminals is in communication with the first CFOA and is adapted to be in further communication with a voltage vM to provide an input current iM for integration by a capacitor Ci. A nonlinear resistor is in communication with the second CFOA. A third CFOA having multiple terminals is in communication with the nonlinear resistor and is in further communication with the first CFOA and a resistor Rd. The third CFOA and the resistor Rd act as an inverting amplifier associated with the nonlinear resistor to increase a current gain to increase a difference between ON and OFF values of a resistance of a realized memristor.Type: GrantFiled: September 18, 2014Date of Patent: April 28, 2015Assignee: King Fahd University of Petroleum and MineralsInventors: Muhammad Taher Abuelma'atti, Zainualbideen Jamal Khalifa
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Patent number: 9008212Abstract: A high data rate millimeter wave radio adapted to receive an binary input data at an input data rate in excess of 3.5 Gbps and to transmit at a transmit data rate in excess of 3.5 Gbps utilizing encoded three-bit data symbols on a millimeter carrier wave at a millimeter wave nominal carrier frequency, defining a carrier wavelength and period, in excess of 70 GHz with differential phase-shift keying utilizing eight separate phase shifts. Preferred embodiments of the invention can support many of the high data rate standards including the following group of protocols or standards: SONET OC-96 (4.976 Gbps); 4xGig-E (5.00 Gbps); 5xGig-E (6.25 Gbps); OBSAI RP3-01 (6.144 Gbps); 6xGig-E (7.50 Gbps); Fibre Channel 8GFC (8.5 Gbps); SONET OC-192 (9.952 Gbps); Fibre Channel 10GFC Serial (10.52 Gbps) and 10 GigaBit Ethernet.Type: GrantFiled: November 30, 2010Date of Patent: April 14, 2015Assignee: Trex Enterprises Corp.Inventors: John Lovberg, Richard Chedester
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Patent number: 9008245Abstract: Techniques are provided for detecting a coded signal in the presence of non-Gaussian interference. In an embodiment, a primary transmitter corresponds to a desired transmitter, and one or more secondary transmitters correspond to interfering transmitters. In an embodiment, received symbols, which include non-Gaussian interference and additive noise, are decoded to determine a set of message bits. In an embodiment, an estimate of the set of message bits may be determined using a minimum-distance detector or an optimal-ML detector, for example, depending on the signal-to-noise and/or signal-to-interference ratios at a receiver.Type: GrantFiled: December 12, 2012Date of Patent: April 14, 2015Assignee: Marvell International Ltd.Inventor: Jungwon Lee
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Patent number: 9001929Abstract: A method and an apparatus for a transmitter to transmit data in a wireless communication system are provided. This method includes: generating a first signal field including at least one symbol; generating a second signal field configured by repeating at least one symbol of the first signal field; and transmitting a frame including the first signal field, the second signal field, and a data field and a first symbol of the second signal field is modulated through binary phase shift keying (BPSK) and symbols from a second symbol of the second signal field are modulated through Q-BPSK. According to the present invention, a service filed can be extended while maintaining compatibility with a wireless communication system in the related art by transmitting a frame using symbol repetition.Type: GrantFiled: January 10, 2012Date of Patent: April 7, 2015Assignee: Electronics and Telecommunications Research InstituteInventors: Il Gu Lee, Heejung Yu, Hun Sik Kang, Sok Kyu Lee
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Patent number: 8964902Abstract: The present invention provides a method and an apparatus for eliminating direct current offset.Type: GrantFiled: November 14, 2011Date of Patent: February 24, 2015Assignee: ST-Ericsson Semiconductor (Beijing) Co., LtdInventors: Jiangshan Chen, Zhenguo Ma, Liyong Yin
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Patent number: 8948292Abstract: In determining an angle for a phase modulation scheme, a key is generated from a prescribed set of bits contained in a symbol. The symbols have an in-phase (I) data word and a quadrature phase (Q) data word that identify coordinates of the symbols in a complex number plane. An angle is retrieved from a memory table from a storage location identified by the key. Each angle in the memory table is established in accordance with constraints under which the memory table was populated so as to be mapped to a phase angle identifying other coordinates in the complex number plane that are within a specified neighborhood about the coordinates of each of the symbols. A signal is generated to convey the symbols as phase differentials at each sample time between a reference phase and the phase angle.Type: GrantFiled: March 13, 2013Date of Patent: February 3, 2015Assignee: Exelis Inc.Inventor: William J. Taft
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Patent number: 8942327Abstract: The present invention employs hierarchical modulation to simultaneously transmit information on different modulation layers using a carrier RF signal. Initially, first data to be transmitted is assigned to a first modulation layer and second data is assigned to a second modulation layer. In one embodiment of the present invention, the first and second data are assigned based on reliability criteria. The first and second modulation layers are hierarchical modulation layers of the carrier RF signal. Once assigned, the first data is transmitted using the first modulation layer of the carrier RF signal and the second data is transmitted using the second modulation layer of the carrier RF signal. In one embodiment of the present invention, information may be transmitted to one end user using one modulation layer, and information may be transmitted to a different end user using a different modulation layer.Type: GrantFiled: October 11, 2012Date of Patent: January 27, 2015Assignee: Apple Inc.Inventors: Ming Jia, Jianglei Ma, Peiying Zhu, Wen Tong, Curt Dodd
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Patent number: 8929431Abstract: Serial data are transmitted between transceivers via a communication path, each bit expressed by a dominant code or a recessive code which vary between dominant and recessive levels, the dominant code having a greater proportion of duration at the dominant level. A device (clock master) can continuously output successive recessive codes to the communication path, in which condition a transceiver can transmit a dominant code by producing an output drive signal which overwrites a part of a recessive code, currently being received from the communication path, to the dominant level. The output drive signal is shaped with a steeper edge slope at a transition from an inactive to an active level than from the active to the inactive level, enabling an increased data transmission rate without increased noise.Type: GrantFiled: July 30, 2013Date of Patent: January 6, 2015Assignee: Denso CorporationInventors: Hideki Kashima, Tomohisa Kishigami, Naoji Kaneko
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Patent number: 8923439Abstract: 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: GrantFiled: June 7, 2013Date of Patent: December 30, 2014Assignee: Intel IP CorporationInventors: Chuanzhao Yu, Mark Kirschenmann
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Patent number: 8923417Abstract: Embodiments disclosed herein relate to apparatus and methods of transceiver power noise reduction. One embodiment relates to a method of serial data communication. At a transmitter, data may be encoded by a communication protocol encoder, and the protocol-encoded data may be serialized. The serialized data may be encoded for power-delivery-network noise reduction (PNR) so as to generate PNR-encoded serial data, and the PNR-encoded serial data may be driven onto a communication channel. Other embodiments, aspects, and features are also disclosed.Type: GrantFiled: January 12, 2012Date of Patent: December 30, 2014Assignee: Altera CorporationInventors: Zhe Li, Hong Shi
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Patent number: 8879661Abstract: A signal processing apparatus configured to correct a distortion introduced by a signal processing path into a processed signal comprising a transformer that transforms the processed signal into a transformed signal in frequency domain, a processor that determines a first correction function and a second correction function upon the basis of a transfer function of the signal processing path, a first multiplier that multiplies values of the transformed signal with coefficients of the first correction function to obtain a first corrected signal, a signal reverser that reverses an order of values in a copy of the transformed signal to obtain a reversed transformed signal, a second multiplier that multiplies values of the reversed transformed signal with coefficients of the second correction function to obtain a second corrected signal, and an adder that adds the first corrected signal and the second corrected signal to obtain a corrected output signal.Type: GrantFiled: February 24, 2012Date of Patent: November 4, 2014Assignee: Huawei Technologies Co., Ltd.Inventor: Nebojsa Stojanovic
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Patent number: 8873658Abstract: An apparatus for receiving signals includes a receiver for receiving a time domain signal from a transmitter, wherein at least one first information bit is mapped, resulting in at least one first mapped symbol; at least one second information bit is mapped, resulting in at least one second mapped symbol; the at least one second mapped symbol is multiplied by at least one third information bit; and the time domain signal is generated from the at least one first mapped symbol and the at least one second mapped symbol.Type: GrantFiled: December 21, 2012Date of Patent: October 28, 2014Assignee: LG Electronics Inc.Inventors: Yeong Hyeon Kwon, Seung Hee Han, Min Seok Noh, Young Woo Yun
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Patent number: 8873609Abstract: A communication apparatus including: a receiver to receive signals including reference signals at each of a plurality of different reception intervals; and a processor to estimate phase differences between the signals based on the reference signals, to determine a plurality of phase difference candidates for each of the reception intervals based on the phase differences, to select, from among a plurality of combinations of the phase difference candidates for the reception intervals, a combination of the phase difference candidates between the signals, and to estimate a frequency deviation of the signals based on the phase difference candidates included in the combination.Type: GrantFiled: September 13, 2012Date of Patent: October 28, 2014Assignee: Fujitsu LimitedInventors: Takato Ezaki, Dai Kimura
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Patent number: 8867656Abstract: When a determination is made that communication by an SM scheme is suitable, a setting unit performs switching from a communication level by an STC scheme to the communication level by the SM scheme, between the communication level at a first level of MCS by the space-time coding scheme and the communication level at a second level of MCS by the SM scheme. When a determination is made that communication by the SM scheme is unsuitable, the setting unit performs switching from the communication level by the STC scheme to the communication level by the spatial multiplexing scheme, between the communication level at a third level of MCS, which is higher than the first level, by the space-time coding scheme and a fourth level of the modulation scheme and the coding rate, which is higher than the second level, by the SM scheme.Type: GrantFiled: December 14, 2011Date of Patent: October 21, 2014Assignee: KYOCERA CorporationInventor: Takeo Miyata
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Patent number: 8861636Abstract: A system is configured to receive a block of symbols, associated with a phase-modulated signal that includes data symbols that correspond to a payload associated with the signal, and control symbols; process the control symbols to identify an amount of phase noise associated with the control symbols; reset a phase, associated with each of the data symbols, based on the amount of phase noise and a reference phase; interleave the respective data samples, of each of the data symbols with other data samples, where the interleaved respective data samples cause errors, associated with the respective data samples, to be spread out among the other data samples and reduces an error rate relative to a prior data rate that existed before the interleaving; and perform forward error correction on the interleaved respective data samples.Type: GrantFiled: September 30, 2011Date of Patent: October 14, 2014Assignee: Infinera CorporationInventors: Han Henry Sun, Kuang-Tsan Wu, Yuejian Wu, Sandy Thomson
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Patent number: 8861644Abstract: The device with IQ mismatch compensation includes a transmitter oscillator, a transmitter module, and a loop-back module. The transmitter module is arranged to up-convert a transmitter signal with the oscillator signal to generate an RF signal. The loop-back module is arranged to down-convert the RF signal with the oscillator signal to determine a transmitter IQ mismatch parameter, and effects of IQ mismatch of the loop-back module are calibrated by inputting a test signal and the oscillator signal before the down-converting of the RF signal. The transmitter module is arranged to reduce effects of IQ mismatch of a transmitter path in the transmitter module according to the transmitter IQ mismatch parameter.Type: GrantFiled: June 24, 2011Date of Patent: October 14, 2014Assignee: Mediatek Inc.Inventors: Hsin-Hung Chen, Hsiang-Hui Chang
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Patent number: 8824589Abstract: A method, an apparatus, and a system are provided in various embodiments of the present invention. According to embodiments of the present invention, the receiver samples the frequency signal from the transmitter to obtain sampling data and obtain the feedback IQ signal from the sampling data, and performs signal correction by using the feedback IQ signal. Sampling the received radio frequency signal does not need an additional component. The receiving channel installed in the receiver can be used to receive the radio frequency signal, which reduces the cost and power consumption.Type: GrantFiled: January 5, 2011Date of Patent: September 2, 2014Assignee: Huawei Technologies Co., Ltd.Inventor: Guixue Zhao
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Patent number: 8804868Abstract: A constant-amplitude and continuous-phase modulation method for modulating digital data and for demodulating said modulated signal, said data taking the form of symbols a(n) that can take a number M of states at least equal to 2, the method including, in transmission, use of a voltage-controlled oscillator (VCO) for which the control is the sum of pulses he(a(n), t?n T), the form and the amplitude of which depends on the value of a(n); and, in reception, use of a single impulse response filter C0(t) regardless of the value of M in transmission, said functions he and C0 having a number of parameters that are optimized in the design of the system in order to obtain at the output of the filter C0 a constellation that is as close as possible to the theoretical constellation.Type: GrantFiled: November 18, 2010Date of Patent: August 12, 2014Assignee: ThalesInventor: Pierre-André Laurent
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Patent number: 8792542Abstract: Apparatus for processing broadband impulses signals of low repetition rate includes a tuner for receiving broadband impulsive signals of low repetition rate and providing an output signal characteristic of the amplitude and spectral content of the received input signal. Resolution bandwidth filters coupled to the tuner output each have a different bandwidth that determines the measurement resolution and influences the sensitivity and transient response to low repetition rate impulsive signals. At least one radio frequency switch selects a resolution bandwidth filter for coupling to and associated one of at least a peak detector, an average detector and an envelope generator. A gate generator coupled to the peak detector, the average detector and the envelope generator furnishes a gating signal to each to provide a peak signal, an average signal and an envelope signal respectively during a selected gating interval. A microprocessor is coupled to the peak detector and the average detector.Type: GrantFiled: March 24, 2010Date of Patent: July 29, 2014Assignee: Doble Engineering CompanyInventors: Scott McMeekin, Brian G. Stewart, Stephen Conner, Carlos Gamio, Alan Nesbitt