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11.发明授权公开(公告)号：US11984929B2
公开(公告)日：2024-05-14
申请号：US17550665
申请日：2021-12-14
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Ling Liu
IPC: H04B10/61 , H04B10/2569 , H04J14/06
CPC classification number: H04B10/2569 , H04B10/614 , H04J14/06
Abstract: The present disclosure provides example method for sending a signal in optical communication, an example optical transmitter, and an example optical communication system. One example method for sending a signal in optical communication includes generating, by an optical transmitter, multiple first subcarriers based on a bit stream. State of polarization (SOP) rotation is performed by the optical transmitter on at least one subcarrier in the multiple first subcarriers to generate multiple second subcarriers, wherein the multiple second subcarriers comprise multiple subcarriers each with a relative SOP rotation angle, and the relative SOP rotation angle is not zero and is not an integer multiple of 90 degrees. The multiple second subcarriers are modulated to an optical signal. The modulated optical signal is sent by the optical transmitter.
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公开(公告)号：US11863799B2
公开(公告)日：2024-01-02
申请号：US17674676
申请日：2022-02-17
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: H04B1/00 , H04N19/93 , H04N19/124 , H04N19/91
CPC classification number: H04N19/93 , H04N19/124 , H04N19/91
Abstract: The disclosure provides image encoding methods and apparatuses. One example encoding method includes: obtaining a one-dimensional sequence of quantized coefficients of an image; obtaining a run-length value sequence and a level value sequence based on the one-dimensional sequence of the quantized coefficients; obtaining an updated second distribution probability of each level value in the level value sequence based on the m first distribution probabilities, the n second distribution probabilities, and a preset mapping rule; and performing encoding based on the level value sequence and the updated second distribution probability of each level value in the level value sequence to obtain and output encoded image data.
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13.发明授权公开(公告)号：US11082135B2
公开(公告)日：2021-08-03
申请号：US16230891
申请日：2018-12-21
Applicant: Huawei Technologies Co., Ltd.
Inventor： Michael Zarubinsky , Doron Cohen , Qingsong Xue , Dori Gidron , Ling Liu , Changsong Xie , Liangchuan Li , Ming Chen
IPC: H04B10/69 , H04L25/03 , H04B7/0413 , H04L27/26
Abstract: The present disclosure relates to an apparatus and method of processing a digital signal, wherein an input signal is transformed into the frequency domain by applying a fast Fourier transformation (FFT) processing to obtain a transformed input signal. Positive and negative frequency components of the transformed input signal are separated and respective ones of the separated positive and negative frequency components are separately processed by respective digital filtering to obtain filtered frequency components. The filtered frequency components are combined in the frequency domain using a down-sampling operation for down-sampling the filtered frequency components from an input number of samples per symbol to a different output number of samples per symbol, and the combined output components are converted into the time domain by applying an IFFT processing.
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14.发明授权公开(公告)号：US10554379B2
公开(公告)日：2020-02-04
申请号：US16283619
申请日：2019-02-22
Applicant: Huawei Technologies Co., Ltd.
Inventor： Ling Liu , Wentong Wan
Abstract: Embodiments of this application provide a method for obtaining a phase detection signal in a clock recovery circuit and a phase detector, configured to obtain a correct phase detection signal. A phase detector obtains sampling sequences sent by an analog to digital converter ADC, where the sampling sequences are obtained by the ADC by sampling, an electrical signal received by the ADC, and the electrical signal carries a pre-configured training sequence; the phase detector calculates a correlation between the sampling sequences and a comparison sequence, to determine a first location and a second location, where the first location and the second location are locations of a starting point of the training sequence in the sampling sequences; and the phase detector obtains a phase detection signal based on a difference parameter of the first location and the second location.
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15.发明申请公开(公告)号：US20190123834A1
公开(公告)日：2019-04-25
申请号：US16230891
申请日：2018-12-21
Applicant: Huawei Technologies Co., Ltd.
Inventor： Michael Zarubinsky , Doron Cohen , Qingsong Xue , Dori Gidron , Ling Liu , Changsong Xie , Liangchuan Li , Ming Chen
IPC: H04B10/69 , H04L25/03 , H04B7/0413 , H04L27/26
Abstract: The present disclosure relates to an apparatus and method of processing a digital signal, wherein an input signal is transformed into the frequency domain by applying a fast Fourier transformation (FFT) processing to obtain a transformed input signal. Positive and negative frequency components of the transformed input signal are separated and respective ones of the separated positive and negative frequency components are separately processed by respective digital filtering to obtain filtered frequency components. The filtered frequency components are combined in the frequency domain using a down-sampling operation for down-sampling the filtered frequency components from an input number of samples per symbol to a different output number of samples per symbol, and the combined output components are converted into the time domain by applying an IFFT processing.
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Patent Agency Ranking
公开(公告)号：US20180248565A1
公开(公告)日：2018-08-30
申请号：US15965250
申请日：2018-04-27
Applicant: Huawei Technologies Co., Ltd.
Inventor： Zhiyu Xiao , Ling Liu , Liangchuan Li
CPC classification number: H03M13/17 , H03M13/27 , H03M13/2778 , H04L1/005 , H04L1/0071
Abstract: An embodiment method includes: performing balancing processing on a data stream that includes a plurality of sub-data stream segments, and performing segment de-interleaving on a data stream obtained after the balancing processing. The method further includes separately performing forward error correction (FEC) decoding on each sub-data stream segment in a data stream obtained after the segment de-interleaving. The method further includes performing, according to a balancing termination state of each sub-data stream segment obtained after previous balancing processing, balancing processing on each sub-data stream segment obtained after the FEC decoding, and performing FEC decoding on the data stream obtained after balancing processing is performed on each sub-data stream segment. When it is determined that a preset iteration termination condition is met, the method includes outputting the data stream obtained after the FEC decoding.
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公开(公告)号：US20130209098A1
公开(公告)日：2013-08-15
申请号：US13838288
申请日：2013-03-15
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yuanda Huang , Liangchuan Li , Ling Liu , Lei Liu
IPC: H04B10/60
CPC classification number: H04B10/60 , H04B10/6161 , H04B10/6164 , H04L27/2657 , H04L27/2697
Abstract: The present invention relates to a method and a device. The method includes: mixing a multi-carrier optical signal with a local optical signal having the same center frequency as that of the multi-carrier optical signal; performing photoelectric conversion and analog-to-digital conversion on an optical signal obtained through the mixing to obtain a digital signal; performing FFT on the digital signal to obtain a frequency domain signal; grouping the frequency domain signal according to each frequency band corresponding to its respective carrier in the multi-carrier optical signal, and performing IFFT on each frequency domain signal group to obtain a corresponding time domain signal for each carrier; and performing data restoration on each time domain signal corresponding to its respective carrier to obtain data carried on each carrier. The solutions of the present invention only require one set of coherent reception device, and have low cost and low power consumption.
Abstract translation: 本发明涉及一种方法和装置。 该方法包括：将多载波光信号与具有与多载波光信号相同中心频率的本地光信号混合; 对通过混合获得的光信号执行光电转换和模数转换，以获得数字信号; 对数字信号执行FFT以获得频域信号; 根据多载波光信号中与其相应载波相对应的每个频带对频域信号进行分组，并对每个频域信号组执行IFFT，以获得每个载波的相应时域信号; 并对与其各自的载波相对应的每个时域信号执行数据恢复，以获得每个载波上承载的数据。 本发明的解决方案仅需要一组相干接收装置，并且具有低成本和低功耗。
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公开(公告)号：US12010352B2
公开(公告)日：2024-06-11
申请号：US17584726
申请日：2022-01-26
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: H04N19/93 , H04N19/184 , H04N19/91
CPC classification number: H04N19/93 , H04N19/184 , H04N19/91
Abstract: The present disclosure provides example coding method, apparatus, and computer-readable storage medium. One example method includes sorting a plurality of pieces of run-length encoding (RLE) data based on their distribution probabilities. The plurality of pieces of sorted RLE data are mapped onto a plurality of pieces of reassembled data. The plurality of pieces of reassembled data are expanded into a plurality of pieces of binary data. A first matrix is generated based on the plurality of pieces of binary data. A code sequence is determined by processing a source signal, where the code sequence comprises a first set and a second set. A first vector is decoded to output a third set, where the third set includes one or more bits reserved after processing the source signal and one or more locations at which a decoding error occurs in one or more bits discarded after processing the source signal.
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公开(公告)号：US09521022B2
公开(公告)日：2016-12-13
申请号：US14995855
申请日：2016-01-14
Applicant: Huawei Technologies Co., Ltd.
Inventor： Ling Liu , Liangchuan Li
CPC classification number: H04L27/0014 , H04B10/6165 , H04L27/3827 , H04L2027/0046 , H04L2027/0067 , H04L2027/0095
Abstract: The present invention provides a cycle-slip detection method and apparatus, and a receiver. If an absolute value of a first difference obtained by subtracting a phase of a first symbol in a kth training sequence cycle from a phase of a last symbol in a (k−1)th training sequence cycle in a received signal is greater than a cycle-slip determining threshold, it is determined that a cycle-slip occurs in the kth or (k−1)th training sequence cycle. Further, if a second difference obtained by subtracting a phase of the first symbol in the (k+1)th training sequence cycle from a phase of the last symbol in the kth training sequence cycle is greater than the cycle-slip determining threshold, and signs of the first difference and the second difference are opposite, it is determined that a cycle-slip occurs in all symbols in the kth training cycle.
Abstract translation: 本发明提供一种循环滑移检测方法和装置以及接收器。 如果通过从接收信号中的第（k-1）训练序列周期中的最后一个符号的相位减去第k个训练序列周期中的第一符号的相位获得的第一差的绝对值大于循环 确定在第k或第（k-1）训练序列周期中发生周期滑移。 此外，如果通过从第k个训练序列周期中的最后一个符号的相位减去第（k + 1）个训练序列周期中的第一符号的相位获得的第二差异大于循环滑移确定阈值， 第一差异和第二差异的符号相反，确定在第k个训练周期中的所有符号中出现周期滑移。
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公开(公告)号：US08995831B2
公开(公告)日：2015-03-31
申请号：US13664134
申请日：2012-10-30
Applicant: Huawei Technologies Co., Ltd.
Inventor： Liangchuan Li , Ling Liu
CPC classification number: H04B10/2572
Abstract: A method for processing optical signals includes performing frequency mixing, photoelectric detection, analog/digital conversion, and dispersion compensation on received input optical signals. First-path polarization multiplexing optical signals and second-path polarization multiplexing optical signals. An initialization update process is performed on filter coefficients. Polarization compensation is performed on the first-path polarization multiplexing optical signals and the second-path polarization multiplexing optical signals by using the filter coefficients on which the initialization update is performed to obtain initialized x-path optical signals and initialized y-path optical signals. Preset x-path training sequences and y-path training sequences are synchronized by using the initialized x-path optical signals and the initialized y-path optical signals. If a synchronization result indicates that polarization cross occurs, the polarization cross is rectified.
Abstract translation: 一种处理光信号的方法包括对接收到的输入光信号执行频率混合，光电检测，模/数转换和色散补偿。 第一路径偏振复用光信号和第二路径偏振复用光信号。 对滤波器系数执行初始化更新处理。 通过使用执行初始化更新的滤波器系数来获得初始化的x路光信号和初始化的y路光信号，对第一路径偏振多路复用光信号和第二路径偏振复用光信号进行极化补偿。 通过使用初始化的x路径光信号和初始化的y路径光信号来同步预置x路径训练序列和y路径训练序列。 如果同步结果表明发生极化交叉，则会纠正极化交叉。
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