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1. 发明公开

EP3048746A1 METHOD AND DEVICE FOR ESTIMATION OF CHROMATIC DISPERSION IN OPTICAL COHERENT COMMUNICATION 有权转让
标题翻译：光学相干通信中色散的估计方法和装置
公开(公告)号：EP3048746A1
公开(公告)日：2016-07-27
申请号：EP14797641.9
申请日：2014-05-23
申请人： ZTE Corporation , ZTE Microelectronics Technology Co., Ltd.
发明人： YAO, Yangzhong , LI, Qiang , LI, Yunpeng , GU, Guohua , REN, Wei
IPC分类号： H04B10/079
CPC分类号： H04B10/07951 , H04B10/612 , H04B10/613 , H04B10/6161 , H04B10/6163 , H04B10/6165 , H04B10/6166
摘要： Disclosed are a chromatic dispersion estimation method and device in optical coherent communication, wherein, the method includes: performing a fast Fourier transform on IQ-imbalance compensated data to obtain frequency-domain data in two polarization directions; calculating autocorrelation sequences of the frequency-domain data and performing an inverse fast Fourier transform on the values of the autocorrelation sequences; calculating modulus squares of the results of the inverse fast Fourier transform, and adding the results in the two polarization directions to obtain P [n]; determining a mean value P [n] of P [n]s of a plurality of data sets; calculating an index n 0 of the maximum value of P̃ [n], and estimating a dispersion value of the optical fiber link according to the index n 0 of the maximum value of P̃ [n]. The abovementioned technical solution allows a significantly accurate and rapid estimation of dispersion values.
摘要翻译：本发明公开了一种光相干通信中的色散估计方法及装置，其中，该方法包括：对IQ不平衡补偿后的数据进行快速傅立叶变换，得到两个极化方向的频域数据; 计算频域数据的自相关序列并对自相关序列的值执行逆快速傅里叶变换; 计算快速傅立叶逆变换结果的模数平方，并将结果在两个偏振方向上相加得到P [n]; 确定多个数据集的P [n]的平均值P [n]; 计算P [n]的最大值的索引n0，并根据最大值P [n]的索引n0估计光纤链路的色散值。上述技术方案允许对色散值进行非常准确且快速的估计。

2. 发明公开

EP3937418A1 SIGNAL SAMPLING METHOD AND APPARATUS, AND OPTICAL RECEIVER 审中-公开
公开(公告)号：EP3937418A1
公开(公告)日：2022-01-12
申请号：EP20872563.0
申请日：2020-09-23
申请人： ZTE Corporation
发明人： GU, Guohua , YAO, Yangzhong , CAO, Nanshan , TAO, Chungui
IPC分类号： H04L7/00 , H04J3/06
摘要： The present disclosure provides a signal sampling method and apparatus, and an optical receiver. The method includes sampling a burst signal that is received according to a first sampling frequency to obtain a first sampling signal; sampling a preamble signal in the first sampling signal according to a second sampling frequency to obtain a second sampling signal; determining a phase difference between the burst signal and a local sampling clock corresponding to the first sampling frequency according to the second sampling signal; and interpolating the first sampling signal according to the phase difference to obtain a target sampling signal.

3. 发明公开

EP2501046A1 DECODING METHOD AND DEVICE FOR CONCATENATED CODE 审中-公开
标题翻译： ENCCHLÜSSELUNGSVERFAHRENUND -VORRICHTUNGFÜREINENVERKNÜPFTENCODE
公开(公告)号：EP2501046A1
公开(公告)日：2012-09-19
申请号：EP10842888.9
申请日：2010-10-22
申请人： ZTE Corporation
发明人： ZHANG, Tao , YOU, Yueyi , CAO, Nanshan , YAO, Yangzhong
IPC分类号： H03M13/00
CPC分类号： H03M13/2906 , H03M13/1102 , H03M13/1128 , H03M13/1515 , H03M13/3715 , H03M13/373
摘要： Disclosed are a decoding method and device for concatenated code, for the decoding of concatenated code composed of low density parity code (LDPC) and Reed-Solomon (RS) code. The method includes: carrying out LDPC soft decision iterative decoding on bit de-interleaved data flow, and carrying out check decision on LDPC codeword obtained from decoding by using a check matrix; carrying out de-byte-interleave on an information bit of the LDPC codeword obtained from decoding and converting check information of the LDPC codeword into puncturing information of RS codeword; selecting a decoding mode according to the puncturing information of the RS codeword to carry out RS decoding. By way of the solution of the present invention, the RS decoding performance can be improved without increasing the computation complexity, thus greatly improving the receiving performance of the CMMB terminal as compared to the conventional method.
摘要翻译：公开了一种用于级联码的解码方法和装置，用于对由低密度奇偶码（LDPC）和里德 - 所罗门（RS）码组成的级联码的解码。该方法包括：对比特解交织数据流进行LDPC软判决迭代解码，并通过使用校验矩阵对从解码获得的LDPC码进行校验决定; 在从解码获得的LDPC码字的信息比特上进行去字节交织，并将LDPC码字的检查信息转换成RS码字的删截信息; 根据RS码字的删截信息选择解码模式，进行RS解码。通过本发明的解决方案，可以在不增加计算复杂度的情况下提高RS解码性能，从而大大提高了CMMB终端与常规方法的接收性能。

4. 发明公开

EP2439851A1 LAYERED ENCODING METHOD AND DEVICE FOR LDPC CODE 有权
标题翻译： ENCODIERUNG EINES SYSTEMATISCHEN LDPC编码器DER VERWENDUNG DER CHECKMATRIX
公开(公告)号：EP2439851A1
公开(公告)日：2012-04-11
申请号：EP10782937.6
申请日：2010-05-17
申请人： ZTE Corporation
发明人： ZHANG, Tao , YOU, Yueyi , LI, Qiang , QIU, Ning , CAO, Nanshan , YAO, Yangzhong
IPC分类号： H03M13/11
CPC分类号： H03M13/1102 , H03M13/116 , H03M13/1182 , H03M13/611 , H03M13/616
摘要： The present disclosure discloses a layered encoding method for a Low Density Parity Check (LDPC) code. The method comprises: determining, according to the structure characteristics of a check-bit matrix part H p of a check matrix H, location information of a check bit corresponding to a layered operation mode in an code word of an LDPC code and row information in H corresponding to the location information; obtaining, according to the determined location information and the corresponding row information, the value of the check bit corresponding to the location information by using the layered operation mode, and updating the code word according to the obtained value of the check bit; executing LU decomposition to a remaining check matrix H t corresponding to a remaining check bit to be determined, to obtain the value of the remaining check bit to be determined, and updating the code word according to the obtained value of the check bit. The present disclosure also discloses a layered encoding device for an LDPC code, which can solve the problems that the memory space required is large and the time delay for encoding is long in existing LDPC encoding methods.
摘要翻译：本公开公开了一种用于低密度奇偶校验（LDPC）码的分层编码方法。该方法包括：根据校验矩阵H的校验位矩阵部分H p的结构特征，确定与LDPC码的码字对应的分层操作模式的校验位的位置信息，以及 H对应位置信息; 根据确定的位置信息和相应的行信息，通过使用分层操作模式获得与位置信息相对应的校验位的值，并根据获得的校验位的值更新代码字; 执行LU分解到与要确定的剩余校验位相对应的剩余校验矩阵H t，以获得待确定的剩余校验位的值，并根据获得的校验位的值更新代码字。本公开还公开了一种用于LDPC码的分层编码装置，其可以解决所存在的存储空间大的问题，并且在现有的LDPC编码方法中编码的时间延迟很长。

5. 发明公开

EP4135277A1 FREQUENCY OFFSET ESTIMATION METHOD AND APPARATUS, ELECTRONIC DEVICE, AND COMPUTER-READABLE MEDIUM 审中-实审转让
公开(公告)号：EP4135277A1
公开(公告)日：2023-02-15
申请号：EP21783743.4
申请日：2021-04-02
申请人： ZTE Corporation
发明人： LI, Shuangxi , YAO, Yangzhong , CAO, Nanshan , LI, Yunpeng
IPC分类号： H04L27/26
摘要： The present disclosure provides a method for estimating a frequency offset, including: extracting sampling points from an input signal according to preset intervals to obtain a plurality of groups of sampling points, with the preset intervals of the groups of sampling points being different; performing processes on a current sampling point and the groups of sampling points to obtain data of arguments of complex numbers corresponding to the preset intervals; and determining an estimation value of a frequency offset of a current input signal according to the data of arguments of complex numbers corresponding to the preset intervals. The present disclosure further provides an apparatus for estimating a frequency offset, an electronic device and a computer-readable medium.

6. 发明授权

EP3048746B1 METHOD AND DEVICE FOR ESTIMATION OF CHROMATIC DISPERSION IN OPTICAL COHERENT COMMUNICATION 有权转让
公开(公告)号：EP3048746B1
公开(公告)日：2018-11-21
申请号：EP14797641.9
申请日：2014-05-23
申请人： ZTE Corporation , Sanechips Technology Co., Ltd.
发明人： YAO, Yangzhong , LI, Qiang , LI, Yunpeng , GU, Guohua , REN, Wei
IPC分类号： H04B10/079 , H04B10/61
CPC分类号： H04B10/07951 , H04B10/612 , H04B10/613 , H04B10/6161 , H04B10/6163 , H04B10/6165 , H04B10/6166
摘要： Disclosed are a chromatic dispersion estimation method and device in optical coherent communication, wherein, the method includes: performing a fast Fourier transform on IQ-imbalance compensated data to obtain frequency-domain data in two polarization directions; calculating autocorrelation sequences of the frequency-domain data and performing an inverse fast Fourier transform on the values of the autocorrelation sequences; calculating modulus squares of the results of the inverse fast Fourier transform, and adding the results in the two polarization directions to obtain P [n]; determining a mean value P [n] of P [n]s of a plurality of data sets; calculating an index n 0 of the maximum value of P [n], and estimating a dispersion value of the optical fiber link according to the index n 0 of the maximum value of P [n]. The abovementioned technical solution allows a significantly accurate and rapid estimation of dispersion values.

7. 发明授权

EP2439851B1 ENCODING OF A SYSTEMATIC LDPC CODE USING THE CHECK MATRIX 有权
标题翻译：一个系统的LDPC码在校验矩阵的编码使用
公开(公告)号：EP2439851B1
公开(公告)日：2017-01-04
申请号：EP10782937.6
申请日：2010-05-17
申请人： ZTE Corporation
发明人： ZHANG, Tao , YOU, Yueyi , LI, Qiang , QIU, Ning , CAO, Nanshan , YAO, Yangzhong
IPC分类号： H03M13/11
CPC分类号： H03M13/1102 , H03M13/116 , H03M13/1182 , H03M13/611 , H03M13/616

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