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公开(公告)号：US20190199495A1
公开(公告)日：2019-06-27
申请号：US16287696
申请日：2019-02-27
IPC分类号： H04L5/00 , H04B7/06 , H04L27/26 , H04L27/04 , H04L27/06 , H04L27/12 , H04L27/14 , H04L25/02 , H04W52/52 , H04L27/18 , H04L29/06 , H04L1/06
CPC分类号： H04L5/0048 , H04B7/0413 , H04B7/06 , H04B7/0626 , H04B7/0632 , H04B7/0671 , H04B7/0689 , H04B7/0697 , H04B7/082 , H04L1/0618 , H04L5/0023 , H04L5/003 , H04L25/0204 , H04L25/0206 , H04L27/04 , H04L27/06 , H04L27/12 , H04L27/14 , H04L27/18 , H04L27/2601 , H04L27/2602 , H04L27/2627 , H04L27/2649 , H04L27/2657 , H04L27/2659 , H04L27/2691 , H04L27/2695 , H04L69/22 , H04W52/52 , H04W72/0453
摘要： A transmission apparatus includes a plurality of orthogonal frequency division multiplexing (OFDM) modulation signal generators, which generate a first OFDM modulation signal and a second OFDM modulation signal. The transmission apparatus also includes a transmitter that transmits the first OFDM modulation signal from a first antenna and the second OFDM modulation signal from a second antenna, in an identical frequency band. A reception apparatus is provided, which includes a plurality of antennas that receive a plurality of OFDM modulation signals; a plurality of OFDM demodulators that transform the plurality of OFDM modulation signals to a plurality of reception signals using Fourier transform; an estimator that outputs a distortion estimation signal using one or more symbols for demodulation included in the plurality of reception signals; and a demodulator that compensates for distortion of the reception signals using the distortion estimation signal and demodulates a data symbol included in the reception signals.
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公开(公告)号：US20190199371A1
公开(公告)日：2019-06-27
申请号：US15854222
申请日：2017-12-26
CPC分类号： H03M7/3055 , G06F13/426 , H03K19/017509 , H03K19/018521 , H03M5/16 , H04L25/0276 , H04L25/49 , H04L27/06
摘要： A method includes, for an N-bit system on chip (SoC), calculating a minimum number of bits NP that can simultaneously switch without producing an error across a complete warranty time period of the N-bit SoC. The method also includes carrying out power estimation calculations for the N-bit SoC using the calculated minimum number of bits NP.
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公开(公告)号：US10333760B2
公开(公告)日：2019-06-25
申请号：US15971100
申请日：2018-05-04
发明人： Tao Wu
摘要： Embodiments of the present disclosure relate to an OFDM-based data transmission method and an apparatus. In one example method, a transmitting device generates a data packet. The data packet comprises at least one orthogonal frequency division multiplexing (OFDM) symbol. The OFDM symbol comprises N sequentially numbered subcarriers. The N subcarriers are divided into L subblocks. Each subblock of the L subblocks comprises └N/L┘ subcarriers including M pilot subcarriers. Start subcarriers of adjacent subblocks are adjacently numbered subcarriers. A numbering interval is the same for adjacent subcarriers in each subblock of the L subblocks. Each subblock of the L subblocks corresponds to one phase rotation signal. Signals carried on the subcarriers in each subblock of the L subblocks are signals obtained by multiplying original signals by a corresponding phase rotation signal. The transmitting device sends the data packet.
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公开(公告)号：US10312896B2
公开(公告)日：2019-06-04
申请号：US15924561
申请日：2018-03-19
发明人： Sung-Ha Kim , Jung Hoon Chun , Hwaseok Oh
摘要： A transmitter includes: a pulse amplitude modulation encoder that encodes serial data to multi-bit transmission data of a first data group and a second data group; a first driver that converts first multi-bit transmission data of the first data group to a first differential signal having a first voltage swing width; a second driver that converts second multi-bit transmission data of the second data group to a second differential signal having a second voltage swing width narrower than the first voltage swing width; a first voltage regulator that provides to the second driver a first low swing voltage for generating the second differential signal; a second voltage regulator that provides to the second driver a second low swing voltage less than the first low swing voltage; and a constant current load switch that provides a current path between the first and second voltage regulators depending on deactivation of the second driver.
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公开(公告)号：US10291438B2
公开(公告)日：2019-05-14
申请号：US15476009
申请日：2017-03-31
IPC分类号： H04L25/02 , H04L25/03 , H04L27/06 , H04L1/06 , H04B7/0413
摘要： An exemplary decoder is provided for decoding a signal received through a transmission channel in a communication system. The exemplary decoder comprises a transformation unit configured to determine a set of auxiliary channel matrices, each auxiliary channel matrix being determined by performing a linear combination of at least one of the column vectors of the channel matrix; a decomposition unit configured to determine a decomposition of each auxiliary channel matrix into an upper triangular matrix and an orthogonal matrix; a matrix selection unit configured to select at least one auxiliary channel matrix among the set of auxiliary channel matrices depending on a selection criterion related to the components of the upper triangular matrices. The decoder determines at least one estimate of vector of information symbols from an auxiliary signal and from the upper triangular matrix corresponding to a selected auxiliary channel matrix by applying a decoding algorithm.
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公开(公告)号：US20190140875A1
公开(公告)日：2019-05-09
申请号：US16242514
申请日：2019-01-08
申请人： BlackBerry Limited
发明人： Shouxing Qu
摘要： In some examples, a binary bit stream of input bits is encoded into a three-amplitude bipolar symbol stream of symbols, the encoding using a coding rule that specifies setting a value of a respective symbol of the symbol stream based on a respective input bit of the binary bit stream and a prior input bit of the binary bit stream that is prior to the respective input bit, the coding rule further specifying that adjacent non-zero pulses keep the same polarity. A radio frequency (RF) carrier signal is modulated using the symbol stream to produce a modulated RF signal.
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公开(公告)号：US10277263B2
公开(公告)日：2019-04-30
申请号：US16061963
申请日：2016-12-12
发明人： Huan-Bang Li , Ryu Miura , Hisashi Nishikawa , Atsushi Osada
摘要： A radio receiver, configured to use an impulse UWB, includes: a reception antenna which receives the impulse UWB, a reception unit which amplifies the received impulse UWB and detects an envelope of the impulse UWB, maximum-peak and minimum-peak detection units which detect a maximum value and minimum value of the envelope, respectively, a comparator which acquires signal data from the envelope with an initial threshold value, a baseband unit which measures an error rate of the signal data, an MPU which calculates a correction value based on the error rate, and an arithmetic unit which calculates a corrected threshold value based on the maximum, minimum and correction values. The arithmetic unit transmits the corrected threshold value to the comparator. The comparator acquires the signal data from the envelope based on the corrected threshold value transmitted from the arithmetic unit.
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公开(公告)号：US20190103838A1
公开(公告)日：2019-04-04
申请号：US16085881
申请日：2017-03-13
申请人： SONY CORPORATION
发明人： YOSHINOBU KAWASAKI , YUJI KIYOTA
摘要： The present technology relates to a modulator and a modulation method for enabling provision of a highly convenient modulator. The modulator is configured to be input a first signal corresponding to one of a positive signal and a negative signal constituting a baseband signal of a differential signal, and a second signal having the same level as the first signal in one of an H level section in which the one signal is at an H level and an L level section in which the one signal is at an L level, and configured to generate a modulation signal obtained by modulating a carrier with the first and second signals to generate a modulation signal that is the amplitude shift keying (ASK)-modulated carrier with the baseband signal. The present technology can be applied to a case of modulating a carrier according to a baseband signal, for example.
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公开(公告)号：US10244274B2
公开(公告)日：2019-03-26
申请号：US16107780
申请日：2018-08-21
申请人： LG ELECTRONICS INC.
发明人： Jong Moon Kim , In Hwan Choi , Kook Yeon Kwak , Byoung Gill Kim , Won Gyu Song , Jin Woo Kim , Hyoung Gon Lee
IPC分类号： H04N21/235 , H04L27/06 , H04L7/04 , H04N21/2383 , H04L1/00 , H04L27/227 , H04N21/438 , H04L7/027 , H04N5/455 , H04N5/44
摘要： A digital television (DTV) receiving system includes an information detector, a resampler, a timing recovery unit, and a carrier recovery unit. The information detector detects a known data sequence which is periodically inserted in a digital television (DTV) signal received from a DTV transmitting system. The resampler resamples the DTV signal at a predetermined resampling rate. The timing recovery unit performs timing recovery on the DTV signal by detecting a timing error from the resampled DTV signal using the detected known data sequence. The carrier recovery unit performs carrier recovery on the resampled DTV signal by estimating a frequency offset value of the resampled DTV signal using the detected known data sequence.
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公开(公告)号：US10243768B2
公开(公告)日：2019-03-26
申请号：US14951283
申请日：2015-11-24
发明人： Guy Restiau , Youssef Ahssini
摘要： A first near-field communication device is configured according to a modulation type transmitted by a second device. A decoder of the first device decodes a received signal using type-A modulation during a first time slot corresponding to the duration of a first type-A symbol. The first device determines the modulation type transmitted by the second device according to the value of the decoded symbol.
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