Phase Shift Keying Modulator Or Quadrature Amplitude Modulator Patents (Class 332/103)
  • Patent number: 11043186
    Abstract: A method for transmitting image data to a display device at high speed is provided. Image data to be transmitted is input to a phase modulation portion, and is mixed with a high-frequency carrier wave. The carrier wave is modulated with a technique of phase-shift keying, and output to a transmission line determined in consideration of the transmission characteristics of the high-frequency wave. A phase regulating portion of the phase modulation portion has a function of adjusting the amount of change in phase with the use of an electric signal. A phase demodulation portion beyond the transmission line demodulates the modulated carrier wave and extracts the image data. The multi-bit image data can be transmitted by the technique of the phase-shift keying. The high-speed transmission enables serial conversion of the original image data and decreases the number of transmission lines.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: June 22, 2021
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Hitoshi Kunitake, Yoshiyuki Kurokawa
  • Patent number: 11030350
    Abstract: Described herein are systems, methods, and apparatuses for securely outputting sensitive information. The systems, methods, and apparatuses may include accessing a data item using a computing device, determining that the data item contains sensitive information, and determining that the computing device is located in a public space. The data item, or a portion thereof, may be modified and the modified data item may be output.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: June 8, 2021
    Assignee: Visa International Service Association
    Inventor: Robert Michael Yost
  • Patent number: 11018736
    Abstract: A transmission apparatus that (i) generates a Quadrature Phase Shift Keying (QPSK) modulation signal s1(t) by applying a QPSK modulation scheme to a first data sequence, (ii) generates a 16-Quadrature Amplitude Modulation (QAM) modulation signal s2(t) by applying a 16-QAM modulation scheme to a second data sequence, (iii) generates a transmission signal z1(t) and a second transmission signal z2(t) by applying a phase hopping process, a precoding process, and a power adjust process to the QPSK modulation signal s1(t) and the 16-QAM modulation signal s2(t), wherein an average transmission power of the 16-QAM modulation signal s2(t) being the same as an average transmission power of the QPSK modulation signal s1(t), and (iv) transmits the transmission signal z1(t) from a first antenna at a first time and a first frequency and the second transmission signal z2(t) from a second antenna at the first time and the first frequency.
    Type: Grant
    Filed: June 23, 2020
    Date of Patent: May 25, 2021
    Assignee: SUN PATENT TRUST
    Inventors: Yutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi
  • Patent number: 10985787
    Abstract: Provided are a system and method for generating phase-coherent signaling when ranging between a transmitting node and a receiving node during wireless communication. Phase coherence is established in response to phase adjustment of a signal to be transmitted from the receiving node, in which such adjustment is commensurate with at least an amount of phase attributable to signaling transmitted by the transmitted node and received at the receiving node.
    Type: Grant
    Filed: December 1, 2020
    Date of Patent: April 20, 2021
    Assignee: Link Labs, Inc.
    Inventor: Mark O. Bloechl
  • Patent number: 10887047
    Abstract: The present invention related to a 5G or pre-5G communication system to be provided to support a higher data transmission rate since 4G communication systems like LTE. The present invention relates to a method and an apparatus for encoding a channel in a communication or broadcasting system supporting parity-check matrices having various sizes are provided. The method for encoding a channel includes determining a block size of the parity-check matrix; reading a sequence for generating the parity-check matrix, and transforming the sequence by applying a previously defined operation to the sequence based on the determined block size.
    Type: Grant
    Filed: November 6, 2019
    Date of Patent: January 5, 2021
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seho Myung, Kyungjoong Kim, Min Jang, Hongsil Jeong
  • Patent number: 10863036
    Abstract: Novel tools and techniques are provided for delivering plain old telephone service (“POTS”) telephony over high speed data networks. In particular, various embodiments provide tools and techniques for concurrent transmission of POTS voice signals and data signals over the same wire(s) of high-speed data lines or data cables. Various systems and methods might, in some instances, utilize upbanding or rebanding of the POTS voice band to a higher frequency band above the data stream band spectrum for transport of voice concurrent with data over the same wire(s) in the cable. The system might comprise interface devices at either end of a cable segment, one interface device to reband the voice signal and to combine the voice signal with the data signal for each dual-transport wire in the cable, and another interface device at the other end to separate the voice signal from the data signal.
    Type: Grant
    Filed: October 2, 2019
    Date of Patent: December 8, 2020
    Assignee: CenturyLink Intellectual Property LLC
    Inventors: Thomas Schwengler, Michael L. Elford
  • Patent number: 10862459
    Abstract: The signal strength of a vector modulator based phase shifter can be increased enabling signals to be received or transmitted over larger distances than existing phase shifters by applying multiple weights to components of a signal. An input signal can be divided into orthogonal components that can be weighted and combined to generate an intermediate signal. A second intermediate signal can be generated by applying complementary weights to the orthogonal component signal. The two intermediate signals can be combined to obtain the phase shifted signal. By combining complementary weighted component signals, a phase shifted signal with improved signal to noise ratio and greater signal strength can be generated.
    Type: Grant
    Filed: November 1, 2018
    Date of Patent: December 8, 2020
    Assignee: Analog Devices, Inc.
    Inventor: Prabir Kumar Saha
  • Patent number: 10833687
    Abstract: A method and associated system have been proposed to achieve power savings in PWM DACs by truncating PWM sequences and maximizing the amount of time available to power up a DAC cell without sacrificing sensitivity to element mismatch. The DAC circuit includes a driver to receive a digital input and to provide a plurality of drive sequences, a digital-to-analog converter, and a controller. The digital-to-analog converter includes an array of digital-to-analog elements operable over several time steps. Upon identifying that the digital signal is below a threshold value, the controller is configured to shorten the drive sequences; and for each time step to identify a first set of elements and a second set of elements among the array of digital-to-analog elements; to apply the shortened drive sequences to the first set; to disable the second set; and to shift the first set and the second set by one element.
    Type: Grant
    Filed: June 17, 2019
    Date of Patent: November 10, 2020
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Joseph Hamilton
  • Patent number: 10812300
    Abstract: Embodiments of the present disclosure disclose method and transmitter to generate and transmit a waveform with an optimized peak to average power (PAPR) in a communication network. The method comprises performing a constellation rotation on input data symbols to create a rotated data symbols, wherein the input data symbols is obtained by performing at least one of prefixing a modulation data with first predefined number (N1) of zero's and post-fixing the modulation data with second predefined number (N2) of zero's. Also, the method comprises performing convolution operation on the input data symbols using one or more filter coefficients to produce a symbol level filtered data. Further, the method comprises pulse shaping the symbol level filtered data to generate a pulse shaped data sequence and processing the pulse shaped data sequence to generate a waveform.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: October 20, 2020
    Assignee: INDIAN INSTITUTE OF TECHNOLOGY HYDERABAD
    Inventor: Kiran Kumar Kuchi
  • Patent number: 10771304
    Abstract: According to an exemplary embodiment, a method of making a Hermetic transform to mitigate noise comprises: receiving over a channel signal frames comprising predetermined data and gaps comprising noise; framing the predetermined data; constructing a set of linear equations which relate a transfer function matrix of the channel to the predetermined data; determining the transfer function matrix by inverting the linear equations using a first pseudo inverse matrix; incorporating transfer function matrix into linear equations for a hermetic transform; and determining the hermetic transform using a second pseudo inverse matrix based on the predetermined data and the noise.
    Type: Grant
    Filed: January 24, 2019
    Date of Patent: September 8, 2020
    Assignee: VertoCOMM, Inc.
    Inventor: Harvey C. Woodsum
  • Patent number: 10763970
    Abstract: A first signal is generated from an input signal by a first delay (70), and by low pass filtering (74). A second signal is generated from the input signal and from a second, longer delayed (72), version of the input signal, such that in response to a pulse on the input signal, the second signal has a sequence of two pulses, coinciding respectively with leading and trailing edges of a corresponding pulse on the first signal. If the signals are electrical, they can drive I and Q inputs of an IQ modulator (84, 86). If generated optically, they can be combined directly to produce the encoded optical output signal. By using such delays and filtering to produce these signals, a CAPS-3 encoded optical signal can be simulated, to obtain its chromatic dispersion tolerance advantages with less complex hardware and less power consumption.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: September 1, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Fabio Cavaliere, Enrico Forestieri
  • Patent number: 10764105
    Abstract: Systems and methods for up-sampling a polar amplitude sample stream in a polar modulator are disclosed. In some embodiments, a process includes receiving, at a polar modulator, an in-phase sample stream and a quadrature sample stream which together characterize a data signal in an IQ plane. The process includes generating a polar amplitude sample stream and a polar phase sample stream. The process includes generating an up-sampled polar amplitude sample stream by (i) identifying an origin crossing of the data signal in the IQ plane, (ii) responsively adjusting an inversion trigger, (iii) selectively applying an inversion to the polar amplitude sample stream based on the inversion trigger, (iv) interpolating the selectively inverted polar amplitude sample stream, and (v) removing the inversion from the interpolated selectively inverted polar amplitude sample stream. The process includes modulating a carrier signal using the up-sampled polar amplitude stream and the polar phase sample stream.
    Type: Grant
    Filed: September 30, 2019
    Date of Patent: September 1, 2020
    Assignee: Innophase, Inc.
    Inventors: Per Konradsson, Sara Munoz Hermoso
  • Patent number: 10721110
    Abstract: The disclosure relates to an error-compensated direct digital modulation device, including: a direct digital radio frequency modulator (DDRM), configured to generate a radio frequency (RF) signal based on a modulation of a digital baseband signal; an error estimator configured to determine an error signal resulting from a deviation based on the generated RF signal and a representation of the digital baseband signal; and an error compensator configured to subtract the error signal from the RF signal to provide an error compensated RF signal.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: July 21, 2020
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Pieter Palmers, Niels Christoffers, Patrick Vandenameele, Johannes Samsom, Koen Cornelissens, Sofia Vatti
  • Patent number: 10700902
    Abstract: A communication system using an increased sampling rate includes a baseband signal generator and a PLL that generates an LO signal and an inverted LO signal. An interpolator generates an interpolated/delayed data stream from a baseband original data stream, and a cell control circuit generate control signals based on the interpolated data stream and the baseband original data stream. An RFDAC generates an RF output signal from the baseband signal using an increased sampling rate, the LO signal, the inverted LO signal, and the control signals.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: June 30, 2020
    Assignee: Intel Corporation
    Inventors: Damir Hamidovic, Christian Mayer, Jovan Markovic
  • Patent number: 10700735
    Abstract: A transmission device, method, and program for signal transmission with reduced intersymbol interference are disclosed. In one example, a mapping unit maps binary data to symbols and a generating unit generates a signal from the mapped symbols. A transmission band-limiting filter performs band limitation of the signal at a corner frequency higher than half a frequency of a symbol rate. A frequency modulating unit performs frequency modulation on a carrier wave on the basis of the band limitation and the signal.
    Type: Grant
    Filed: May 2, 2016
    Date of Patent: June 30, 2020
    Assignee: Sony Corporation
    Inventor: Sachio Iida
  • Patent number: 10680870
    Abstract: A transmitter, comprising a processor adapted to convert a primary sequence of modulation symbols into a primary signal, using a primary pulse shape, convert an auxiliary sequence of modulation symbols, created from the primary sequence, to an auxiliary signal using an auxiliary pulse shape and create a joint output signal based on the primary signal and on the auxiliary signal.
    Type: Grant
    Filed: May 9, 2019
    Date of Patent: June 9, 2020
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yoav Levinbook, Doron Ezri, Ezer Melzer, Zongjie Wang
  • Patent number: 10680701
    Abstract: A method performed on-board by a satellite for processing a signal received from a terminal during a current time interval, includes receiving, during the current time interval, a main signal containing a message from a terminal, each message having a priority level; sampling the main signal to obtain samples; storing the obtained samples into the satellite memory; first demodulating the messages corresponding to the current time interval contained in the samples stored in memory; when the satellite is in the range of a ground station, transmitting to the ground station the content of the memory. The first demodulating includes, for each message of the messages contained in the samples and by priority order: demodulating and decoding the message; forwarding, using direct link or inter-satellite-link, the demodulated message to a ground station; estimating the number of remaining non-demodulated messages in the samples stored in the memory.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: June 9, 2020
    Assignees: EUTELSAT S A, M.B.I. S.r.l.
    Inventors: Antonio Arcidiacono, Daniele Vito Finocchiaro, Rocco Mauro Bueti, Marco Andrenacci
  • Patent number: 10624158
    Abstract: A radio frequency inductive heating apparatus includes a control device, a plurality of radio frequency devices, a plurality of transformers, a resonant tank circuit, a heating element, a first power supply, and a second power supply. The radio frequency devices are selectively activated by the control device, and each of the plurality of radio frequency devices is coupled to the primary winding of one of the plurality of transformers. The secondary winding of each of the plurality of transformers is coupled to the resonant tank circuit, and the heating element is coupled to the resonant tank circuit. The plurality of radio frequency devices includes a first radio frequency device and a second radio frequency device. The first radio frequency device is coupled to the first power supply, and the second radio frequency device is operatively coupled to the second power supply. A corresponding method is also disclosed.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: April 14, 2020
    Assignee: UltraFlex International Inc.
    Inventors: Philip Charles Schmitt, Mario Metodiev, Stanimir Bonev Bonev
  • Patent number: 10608743
    Abstract: A reception circuit includes a first adaptive compensator compensating distortion of a received signal. An adaptive compensation coefficient calculator includes a known-signal detector detecting first and second known-signals from the received signal, a second adaptive compensator compensating distortion of the received signal, a tap coefficient initial value calculator calculating an initial value of a tap coefficient of the second adaptive compensator by comparing the first known-signal with its true value, a first phase shift compensator compensating phase shift of an output of the second adaptive compensator using the second known-signal, and a tap coefficient calculator calculating tap coefficients of the first and second adaptive compensators by comparing at least one of the first and second known-signals compensated by the second adaptive compensator and the first phase shift compensator with its true value.
    Type: Grant
    Filed: May 26, 2017
    Date of Patent: March 31, 2020
    Assignees: NTT ELECTRONICS CORPORATION, NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Tomohiro Takamuku, Etsushi Yamazaki, Katsuichi Oyama, Yasuharu Onuma, Kazuhito Takei, Masanori Nakamura, Mitsuteru Yoshida, Masahito Tomizawa, Yoshiaki Kisaka
  • Patent number: 10587354
    Abstract: Techniques are disclosed to provide a data dependent delay for a multi-phase transmitter architectures. These techniques include identifying a current segment occupied by a symbol associated with in-phase (I) and quadrature phase (Q) data within a data constellation based upon the number of phases used. Once the segment is identified, vector components are calculated as a function of the segment used to re-map the symbol within the constellation defined in accordance with the number of phases. The data delay may be performed in the baseband or at the RF rate to time-align local oscillator clocks with the delayed data, which is represented as the calculated vector components, for transmission. Further modifications to the RF-DAC operation to facilitate operation with the multi-phase system are also disclosed.
    Type: Grant
    Filed: November 26, 2018
    Date of Patent: March 10, 2020
    Assignee: Intel Corporation
    Inventors: Damir Hamidovic, Tobias Buckel, Alexander Klinkan, Franz Kuttner, Jovan Markovic, Peter Preyler
  • Patent number: 10574352
    Abstract: Generation of data streams for two dimensions comprises compensation for a nonideal response of a signal path in an optical communications signal. The data streams are converted to analog electrical signals which drive two dimensions of an electrical-to-optical converter. Output of the electrical-to-optical converter is coupled through an optical link to an optical-to-electrical converter.
    Type: Grant
    Filed: November 23, 2018
    Date of Patent: February 25, 2020
    Assignee: Ciena Corporation
    Inventors: Kim B. Roberts, Maurice O'Sullivan, Leo Strawczynski, Kieran Parsons, John McNicol
  • Patent number: 10568042
    Abstract: A data transmission method includes: allocating, based on a power ratio value of near user equipment to far user equipment in two paired user equipments, a transmit power to each of the near user equipment and the far user equipment, where the power ratio value is a ratio in a first ratio set, at least one ratio in the first ratio set can be selected from a second ratio set. A plurality of power ratio values of near user equipment to far user equipment in two paired user equipments can be provided.
    Type: Grant
    Filed: February 11, 2019
    Date of Patent: February 18, 2020
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Xinqian Xie, Zhiheng Guo, Xingqing Cheng, Leiming Zhang
  • Patent number: 10545390
    Abstract: A device may include a plurality of interferometers. The plurality of interferometers may include a parent interferometer, a first child interferometer coupled to a first branch of the parent interferometer, and a second child interferometer coupled to a second branch of the parent interferometer. At least one of the plurality of interferometers may be calibrated by maintaining collinearity of an output of the first branch and the second branch and using perturbation signals.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: January 28, 2020
    Assignee: Lumentum Operations LLC
    Inventor: Amit Mizrahi
  • Patent number: 10523489
    Abstract: A polar transmitter and method thereof generate a filtered IQ waveform in IQ space representing an input bit stream. The filtered IQ waveform is modified to avoid a zero crossing region by intermittently adding thereto a zero crossing avoidance signal with a frequency spectrum comprising at least first and second tones defining first and second peaks on opposite sides of a center-frequency valley. A polar signal comprising a polar amplitude and phase is generated based on the modified IQ waveform. An RF carrier is modulated using the polar signal.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: December 31, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Jacob Christopher Sharpe
  • Patent number: 10461985
    Abstract: Apparatus and methods for signal generation, reception, and calibration involving quadrature modulation and frequency conversion. Embodiments of the present invention provide extremely wide bandwidth, high spectral purity, versatility and adaptability in configuration, and ease of calibration, and are particularly well-adapted for use in integrated circuitry.
    Type: Grant
    Filed: October 28, 2018
    Date of Patent: October 29, 2019
    Assignee: VAYYAR IMAGING LTD.
    Inventors: Zivi Nadiri, Jonathan Rosenfeld, Naftali Chayat
  • Patent number: 10440189
    Abstract: Novel tools and techniques are provided for delivering plain old telephone service (“POTS”) telephony over high speed data networks. In particular, various embodiments provide tools and techniques for concurrent transmission of POTS voice signals and data signals over the same wire(s) of high-speed data lines or data cables. Various systems and methods might, in some instances, utilize upbanding or rebanding of the POTS voice band to a higher frequency band above the data stream band spectrum for transport of voice concurrent with data over the same wire(s) in the cable. The system might comprise interface devices at either end of a cable segment, one interface device to reband the voice signal and to combine the voice signal with the data signal for each dual-transport wire in the cable, and another interface device at the other end to separate the voice signal from the data signal.
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: October 8, 2019
    Assignee: CenturyLink Intellectual Property LLC
    Inventors: Thomas Schwengler, Michael L. Elford
  • Patent number: 10439618
    Abstract: The present application relates to a circuit of a frequency divider arranged to divide a frequency of an input clock signal by odd integer N and a method of operating the circuit. A shift register comprises a number of N+1 clock gating cells, which are connected in series to each other, and a shift logic. An input clock signal is fed into clock signal inputs of each one of the number of N+1 clock gating cells. The shift logic is configured to receive enable signals from a set of the number of N+1 clock gating cells and to generate a feedback signal, which is supplied to a gate enable input of the first one of the number of N+1 clock gating cells. A multiplexer is configured to receive at input ports N+1 gated clock signals and to output a rotation clock signal, which has a frequency of 2/N of the frequency of the input clock signal. A frequency generator is configured to receive the rotation clock signal and to generate an output clock signal having a frequency of 1/N.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: October 8, 2019
    Assignee: NXP USA, Inc.
    Inventors: Thierry Robin, Bernard Pierre Francois Pechaud, Domenico Desposito
  • Patent number: 10432222
    Abstract: A transmitting apparatus is disclosed. The transmitting apparatus includes an encoder to perform channel encoding with respect to bits and generate a codeword, an interleaver to interleave the codeword, and a modulator to map the interleaved codeword onto a non-uniform constellation according to a modulation scheme, and the constellation may include constellation points defined based on various tables according to the modulation scheme.
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: October 1, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Belkacem Mouhouche, Daniel Ansorregui Lobete, Hong-sil Jeong
  • Patent number: 10419132
    Abstract: The continuous demand for capacity and the limited available spectrum in wireless and wired communication has led to reliance on advanced modulation techniques to dramatically increase the number of bits per hertz per second. This demand in capacity and using the higher order constellations shorten the link range, and as a result, system gain becomes an important characteristic. The modulation techniques described here improve the system gain by, e.g., as much as 2.5 dB in high order modulations such as 4096-QAM. The modulation techniques include reducing the peak to average ratio and adding shaping gain. These techniques dramatically improve the system capacity, system gain, power consumption and system cost.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: September 17, 2019
    Assignee: Maxlinear Asia Singapore PTE LTD
    Inventors: Nadav Fine, Ran Soffer
  • Patent number: 10374852
    Abstract: The present invention relates to a high data rate Ka-band modulator and transmitter for space applications that functions on the entire NASA Space Network Return Link band of 25.25-27.75 GHz. The modulator is capable of quadrature phase-shift keying (QPSK) modulation and 8-PSK modulation. The transmitter can be designed to provide an adjustable drive to a traveling-wave tube amplifier (TWTA) or transmit power.
    Type: Grant
    Filed: September 10, 2018
    Date of Patent: August 6, 2019
    Assignee: United States of America as represented by the Administrator of NASA
    Inventors: Wei-Chung Huang, Jeffrey M. Jaso
  • Patent number: 10340956
    Abstract: The invention relates to a MAP decoding method of a signal received through a noisy channel, the signal being composed of symbols in an alphabet having a non-uniform probability distribution, the symbols being represented by points in a lattice (?). The probability distribution of symbols is modeled using a Gaussian distribution. An augmented lattice (?exp) is formed from the lattice (?) and the ratio (?) between variance of the noise and variance of the Gaussian distribution of symbols. Therefore, the disclosed MAP decoding method consists essentially of decoding using an ML criterion searching the point in the augmented lattice closest to the point representative of the received signal (yexp).
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: July 2, 2019
    Assignee: INSTITUT MINES-TELECOM
    Inventors: Asma Mejri, Ghaya Rekaya-Ben Othman
  • Patent number: 10326474
    Abstract: A transmitter is provided. The transmitter includes: a Low Density Parity Check (LDPC) encoder configured to encode input bits to generate parity bits; a parity permutator configured to perform parity permutation by interleaving the parity bits and group-wise interleaving a plurality of bit groups including the interleaved parity bits; and a puncturer configured to select some of the parity bits in the group-wise interleaved bit groups, and puncture the selected parity bits, wherein the parity permutator group-wise interleaves the bit groups such that some of the bit groups are positioned at predetermined positions, respectively, and a remainder of the bit groups are positioned without an order within the group-wise interleaved bit groups so that the puncturer selects parity bits included in the some of the bit groups positioned at the predetermined positions sequentially and selects parity bits included in the remainder of the bit groups without an order.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: June 18, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyung-joong Kim, Se-ho Myung, Hong-sil Jeong
  • Patent number: 10312938
    Abstract: A transmitter is provided. The transmitter includes: a Low Density Parity Check (LDPC) encoder configured to encode input bits to generate parity bits; a parity permutator configured to perform parity permutation by interleaving the parity bits and group-wise interleaving a plurality of bit groups including the interleaved parity bits; and a puncturer configured to select some of the parity bits in the group-wise interleaved bit groups, and puncture the selected parity bits, wherein the parity permutator group-wise interleaves the bit groups such that some of the bit groups are positioned at predetermined positions, respectively, and a remainder of the bit groups are positioned without an order within the group-wise interleaved bit groups so that the puncturer selects parity bits included in the some of the bit groups positioned at the predetermined positions sequentially and selects parity bits included in the remainder of the bit groups without an order.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: June 4, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyung-Joong Kim, Se-ho Myung, Hong-sil Jeong
  • Patent number: 10298428
    Abstract: A wireless transmission device includes a reception circuit that receives a ASK or PSK designation signal designating amplitude-shift keying (ASK) or phase-shift keying (PSK), respectively, an amplitude control signal generation circuit that generates an amplitude control signal having an amplitude corresponding to a change in a signal level of the data signal, a polarity reversal circuit that generates a polarity reversal signal by reversing a polarity of a carrier wave signal according to the signal level of the data signal upon receiving a ASK designation signal, an amplifier circuit that generates a PSK signal by amplifying the polarity reversal signal at an amplification rate based on the amplitude control signal upon receiving a PSK designation signal, and generates an ASK signal by modulating an amplitude of the carrier wave signal at an amplification rate based on the amplitude control signal upon receiving the ASK designation signal.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: May 21, 2019
    Assignee: LAPIS Semiconductor Co., Ltd.
    Inventor: Takashi Taya
  • Patent number: 10292101
    Abstract: Methods, systems, and devices for wireless communication are described. A wireless device, such as a device in a wireless local area network, may use a radio frame structure that includes a high efficiency (HE) signal field and an HE data field for communications, for example, over shared radio frequency spectrum. One or more bits or symbols within the HE signal field may be adjusted to avoid a high peak-to-average power ratio (PAPR). In some cases, the adjustment may be to a signal A (SIG-A) or signal B (SIG-B) field. In some examples, a random bit sequence may be used for padding in a signal field. In other examples, bits may be reversed or scrambled. In yet other examples, bits may be modulated and a phase rotation may be applied to the corresponding signal.
    Type: Grant
    Filed: May 5, 2017
    Date of Patent: May 14, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Lin Yang, Bin Tian
  • Patent number: 10284248
    Abstract: An RF front-end circuit of an RF transceiver is described herein. In accordance with one exemplary embodiment, the fronted circuit includes a local oscillator (LO) configured to generate an RF transmit signal, an RF output port coupled to the local oscillator, wherein the RF transmit signal is output at the RF output port, and a monitoring circuit receiving an input signal and configured to determine the phase of the input signal or the power of the input signal or both. A directional coupler is coupled to the RF output port and configured to direct a reflected signal incoming at the RF output port as input signal to the monitoring circuit, and a controller is configured to detect, based on the determined phase or power or both, a defect in a signal path operably connected to the RF output port.
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: May 7, 2019
    Assignee: Infineon Technologies AG
    Inventors: Helmut Kollmann, Jochen O. Schrattenecker, Florian Starzer
  • Patent number: 10284238
    Abstract: A radio frequency transmitter includes a digital-to-analog converter (DAC), a load circuit, and a modulator circuit. The load circuit is coupled to an output of the DAC. The modulator circuit is coupled to the DAC and the load circuit. The modulator circuit includes a driver circuit configured to provide a bias voltage to the load circuit, and an amplifier configured to receive an output of the DAC biased by an output of the load circuit.
    Type: Grant
    Filed: June 11, 2018
    Date of Patent: May 7, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Jagdish Chand, Subhashish Mukherjee
  • Patent number: 10230477
    Abstract: The continuous demand for capacity and the limited available spectrum in wireless and wired communication has led to reliance on advanced modulation techniques to dramatically increase the number of bits per hertz per second. This demand in capacity and using the higher order constellations shorten the link range, and as a result, system gain becomes an important characteristic. The modulation techniques described here improve the system gain by, e.g., as much as 2.5 dB in high order modulations such as 4096-QAM. The modulation techniques include reducing the peak to average ratio and adding shaping gain. These techniques dramatically improve the system capacity, system gain, power consumption and system cost.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: March 12, 2019
    Assignee: MAXLINEAR ASIA SINGAPORE PTE LTD
    Inventors: Nadav Fine, Ran Soffer
  • Patent number: 10225108
    Abstract: A device implementing a channel estimation for multi-channel transmissions system may include at least one processor configured to receive a set of signals over a set of channels, wherein each signal of the set of signals includes one of a set of channel estimation sequences. The set of channel estimation sequences may have been selected based at least in part on a signal quality metric, such as a peak-to-average power ratio, associated with a combination of the set of signals. The at least one processor may be further configured to perform a channel estimation for each channel based at least in part on the channel estimation sequence included in the signal received over each channel. In one or more implementations, the set of channel estimation sequences may be selected to minimize the signal quality metric associated with the combination of the plurality of channels.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: March 5, 2019
    Assignee: Avago Technologies International Sales Pte. Limited
    Inventors: Avraham Kliger, Leo Montreuil
  • Patent number: 10211803
    Abstract: A signal conversion apparatus includes first and second input ports and first and second output ports. A first splitter is coupled to convert a first single-ended signal received on the first input port into a differential signal including first and second opposite-phase components, and to provide the first and second opposite-phase components respectively on the first and second output ports. A second splitter is separate from the first splitter and is coupled to convert a second single-ended signal received on the second input port into a common-mode signal including first and second in-phase components, and to provide the first and second in-phase components respectively on the first and second output ports together with the first and second opposite-phase components.
    Type: Grant
    Filed: September 1, 2009
    Date of Patent: February 19, 2019
    Assignee: Maxlinear Isreal Ltd.
    Inventors: Nir Yahav, Ofer Rahmanony
  • Patent number: 10211930
    Abstract: The continuous demand for capacity and the limited available spectrum in wireless and wired communication has led to reliance on advanced modulation techniques to dramatically increase the number of bits per hertz per second. This demand in capacity and using the higher order constellations shorten the link range, and as a result, system gain becomes an important characteristic. The modulation techniques described here improve the system gain by, e.g., as much as 2.5 dB in high order modulations such as 4096-QAM. The modulation techniques include reducing the peak to average ratio and adding shaping gain. These techniques dramatically improve the system capacity, system gain, power consumption and system cost.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: February 19, 2019
    Assignee: MAXLINEAR ASIA SINGAPORE PTE LTD
    Inventors: Nadav Fine, Ran Soffer
  • Patent number: 10200907
    Abstract: In one example embodiment, a network control node includes a memory having computer-readable instruction stored therein, and a processor. The processor is configured to execute the computer-readable instructions to determine an uplink correction parameter based on at least one of network loading conditions and a modulation coding scheme used for transmission of data packets on an uplink channel from a user equipment to the network control node, determine a target signal to interference plus noise ratio (SINR) for the user equipment based on the uplink correction parameter, and adjust the modulation coding scheme based on the determined target SINR.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: February 5, 2019
    Assignee: Nokia of America Corporation
    Inventor: Asif D. Gandhi
  • Patent number: 10194805
    Abstract: The present invention pertains to a method and an apparatus for Raman spectroscopy of human tissue. Human tissue is illuminated with a laser emitting a first wavelength of light. A Raman signal is measured and optical properties are determined at this wavelength such that the measured Raman signal can be corrected based on determined optical properties. Determined optical properties may be the scattering coefficient and absorption coefficient of the tissue. A system for Raman spectroscopy of human tissue includes a frequency sweeping laser light source for illumination, and a filtered detector for collecting the Raman signal.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: February 5, 2019
    Assignee: Triple Ring Technologies, Inc.
    Inventors: Kate Leeann Bechtel, Brian Patrick Wilfley
  • Patent number: 10177852
    Abstract: The present disclosure discloses a method and an apparatus for automatically controlling a bias voltage of an optical modulator. The method includes: calculating a new Q bias voltage based on an acquired Q reference phase, a Q harmonic phase, a Q harmonic amplitude, a Q bias voltage and a Q error feedback coefficient, calculating a new I bias voltage based on an I reference phase, an I harmonic phase, an I harmonic amplitude, an I bias voltage and an I error feedback coefficient, and calculating a new P bias voltage based on a P reference phase, a P harmonic phase, a P harmonic amplitude, a P bias voltage and a P error feedback coefficient.
    Type: Grant
    Filed: May 4, 2015
    Date of Patent: January 8, 2019
    Assignee: PLUGTECH PRECISION SYSTEMS LIMITED (SHENZHEN)
    Inventors: Yuqi Chen, Bing Fang, Yongzhan Zhao
  • Patent number: 10103761
    Abstract: Control circuitry for use in generating a local oscillator (LO) signal is provided. Synthesizer control circuitry is configured to control synthesizer circuity to generate an analog oscillator signal having a first frequency at which phase noise is minimized. DS control circuitry is configured to generate a control word or message to cause DS circuitry to generate a digital DS signal having a desired frequency when the DS circuitry is clocked by the oscillator signal having the first frequency. The desired frequency is proportional to the LO signal frequency. The digital DS signal generated by the DS circuitry is used to generate the LO signal. Thus the first frequency used to clock the DS circuitry is selected to optimize the oscillator rather than having some relationship to the LO frequency. In addition, a single synthesizer may be used in order to simultaneously generate many LO signals.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: October 16, 2018
    Assignee: Intel Corporation
    Inventors: Igal Kushnir, Gil Horovitz, Sarit Zur
  • Patent number: 10103758
    Abstract: This application discussed trajectory modification techniques for polar transmission architectures. In an example, a method can include receiving a first sample, determining an absolute phase angle change between the first sample and a third sample, and if the first angle change is greater than a threshold phase angle, adjusting phase information of a second sample to provide a modified second sample such that a trajectory associated with the first sample, the modified second sample and the third sample passes through an origin. In an example, the second sample can be received prior to receiving the first sample, and the third sample can be received prior to receiving the second sample.
    Type: Grant
    Filed: August 22, 2016
    Date of Patent: October 16, 2018
    Assignee: Intel IP Corporation
    Inventor: Staffan Sahlin
  • Patent number: 10103753
    Abstract: A pipeline ADC comprising an ADC segment and a digital backend coupled to the ADC segment. In some examples the ADC is configured to receive an analog signal, generate a first partial digital code representing a first sample of the analog signal, and generate a second partial digital code representing a second sample of the analog signal. In some examples the digital backend is configured to receive the first and second partial digital codes from the ADC segment, generate a combined digital code based at least partially on the first and second partial digital codes, determine a gain error of the ADC segment based at least partially on a first correlation of a PRBS with a difference between the first and second partial digital codes, and apply a first correction to the combined digital code based at least partially on the gain error of the ADC segment.
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: October 16, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Viswanathan Nagarajan, Srinivas Kumar Reddy Naru, Narasimhan Rajagopal
  • Patent number: 10103927
    Abstract: A distribution system that may include multiple radio frequency outputs, a group of channel processing and digital up conversion units, and a set of digital to analog converters. The set of digital to analog converters is coupled between the group of channel processing and digital up conversion units and the multiple radio frequency outputs. The group of channel processing units may be arranged to generate multiple digital multiplexes and to provide the multiple digital multiplexes to the set of digital to analog converters. Each digital multiplex comprises digital broadcast channels provided from at least two channel processing and digital up conversion units. The set of the digital to analog converters may be arranged to convert the multiple digital multiplexes to provide multiple analog multiplexes and to provide the multiple analog multiplexes to the multiple radio frequency outputs.
    Type: Grant
    Filed: November 6, 2014
    Date of Patent: October 16, 2018
    Assignee: Harmonic, Inc.
    Inventors: Ariel Zaltsman, Boris Brun, Guy Levy
  • Patent number: 10084631
    Abstract: A technique of mapping data, suitable for Peak to Average Power Ratio (PAPR) reduction while transmitting data portions via a communication channel limited by a peak power ppeak. The mapping is performed by utilizing a Markovian symbol transition probability distribution with quantized probabilities and by selecting, for a specific data portion at a current channel state, such a binary symbol (called thinned label) which allows puncturing one or more bits in the thinned label's bit sequence before transmission.
    Type: Grant
    Filed: June 6, 2017
    Date of Patent: September 25, 2018
    Assignee: RAMOT AT TEL-AVIV UNIVERSITY LTD.
    Inventors: Dan Raphaeli, Yonathan Tate, Or Levi
  • Patent number: RE47846
    Abstract: A wireless communication system is provided for reducing the probability that latency before data transmission increases when a mobile station that is actually in sync is judged to be out of sync. A base station causes the timing calculation part to calculate the timing advance (TA) of a transmit timing from the mth mobile station; causes the timer adaptive control part to obtain the traveling speed or the time variation in TA of the mth mobile station and, adaptively determines and outputs as the timer update information the length of the mth first timer within an M number in total of synchronization timers and the length of the second timer of the mth mobile station and update the length of the mth first timer; and transmits from the downlink transmission part a downlink signal which contains timer update information.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: February 4, 2020
    Assignee: NEC CORPORATION
    Inventors: Hisashi Futaki, Jinsock Lee