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1. 发明申请

WO2017152680A1 FRACTIONALLY SPACED ADAPTIVE EQUALIZER WITH NON-INTEGER SAMPLING 审中-公开
标题翻译：非整数抽样的分数阶空间自适应均衡器
公开(公告)号：WO2017152680A1
公开(公告)日：2017-09-14
申请号：PCT/CN2016/110463
申请日：2016-12-16
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： ALI SHAH, Syed Faisal , LI, Chuandong , ZHANG, Zhuhong
IPC分类号： H04L25/03 , H04B1/06 , H04B10/2507
摘要： An apparatus for performing fractionally spaced adaptive equalization with non-integer sub-symbol sampling has an adaptive equalizer that receives a continuous stream of input data having a non-integer, fractional delay between consecutive samples at a non-integer, sub-symbol rate and outputs a stream of equalized data based on tap weights of taps of the adaptive equalizer that are spaced at an interval corresponding to the non-integer, sub-symbol rate. The tap weights are updated independently of the fractional delay between consecutive samples of the input data using an error signal. An equalizer output alignment component downstream of the adaptive equalizer aligns the stream of equalized data with a corresponding transmitted symbol.
摘要翻译：用于执行具有非整数子符号采样的分数间隔自适应均衡的设备具有自适应均衡器，该自适应均衡器接收在非连续采样之间的非整数分数延迟的连续输入数据流整数，子符号率，并且基于自适应均衡器的抽头的抽头权重来输出均衡数据流，所述抽头权重以对应于非整数子符号率的间隔隔开。使用误差信号独立于输入数据的连续采样之间的分数延迟来更新抽头权重。自适应均衡器下游的均衡器输出对齐组件将均衡数据流与对应的传输符号对齐。

2. 发明申请

WO2017059783A1 METHOD AND APPARATUS FOR RESIDUAL PHASE NOISE COMPENSATION 审中-公开
标题翻译：残留噪声补偿的方法和装置
公开(公告)号：WO2017059783A1
公开(公告)日：2017-04-13
申请号：PCT/CN2016/100836
申请日：2016-09-29
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： ZAMANI, Mahdi , NAJAFI, Hossein , YAO, Demin , MITRA, Jeebak , LI, Chuandong , ZHANG, Zhuhong
IPC分类号： H04L27/00
CPC分类号： H04L25/03273 , H04L25/03203 , H04L27/0014 , H04L27/2275 , H04L27/3836 , H04L2027/0038
摘要： A method and apparatus for performing residual phase noise compensation is described. A coarse carrier compensation of a received modulated signal is performed to obtain a coarse carrier compensated signal and a trellis-based residual carrier recovery is performed to estimate a residual phase noise of the coarse carrier compensated signal. The coarse carrier compensated signal is compensated based on the estimated residual phase noise.
摘要翻译：描述了执行剩余相位噪声补偿的方法和装置。执行接收的调制信号的粗略载波补偿以获得粗略的载波补偿信号，并且执行基于网格的残余载波恢复以估计粗略载波补偿信号的残余相位噪声。基于估计的残余相位噪声来补偿粗略载波补偿信号。

3. 发明申请

WO2016115977A1 METHOD AND APPARATUS WITH IMPROVED ESTIMATION ACCURACY AND ROBUSTNESS FOR FINE FREQUENCY OFFSET ESTIMATION IN COHERENT RECEIVERS 审中-公开
标题翻译：具有改进的估计精度和稳定性的方法和装置，用于在相邻接收器中精细频偏估计
公开(公告)号：WO2016115977A1
公开(公告)日：2016-07-28
申请号：PCT/CN2016/070155
申请日：2016-01-05
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： ZAMANI, Mahdi , ZHANG, Zhuhong , LI, Chuandong
IPC分类号： H04B7/204
CPC分类号： H04L25/024 , H04B10/6164 , H04B10/6165 , H04L27/0014 , H04L27/2271 , H04L27/3827 , H04L2027/0038 , H04L2027/0057 , H04L2027/0085
摘要： The present disclosure provides a method and system for fine estimation of a local oscillator frequency offset of a received signal at a coherent receiver, by evaluating the probability mass function (PMF) of the signal phase of output symbols at different frequencies. At frequencies other than the actual frequency offset, the signal phase is uniformly distributed in [-π, π] such that the summation of a function of PMF values where the function is convex or concave between 0 and 1 can be utilized to determine an a frequency offset to be used by the coherent receiver.
摘要翻译：本公开提供了一种用于通过评估不同频率处的输出符号的信号相位的概率质量函数（PMF）来精细估计相干接收机处的接收信号的本地振荡器频率偏移的方法和系统。在实际频率偏移以外的频率下，信号相位均匀分布在[-π，π]中，使得功能在0和1之间的凸起或凹入的PMF值的函数的总和可用于确定a 频率偏移由相干接收机使用。

4. 发明申请

WO2022156734A1 METHOD AND APPARATUS OF LOW-COMPLEXITY PATTERN DEPENDENT LOOKUP TABLE PRE-COMPENSATION 审中-公开
公开(公告)号：WO2022156734A1
公开(公告)日：2022-07-28
申请号：PCT/CN2022/072925
申请日：2022-01-20
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： KE, Jianhong , LI, Chuandong , TANG, Xuefeng
IPC分类号： H04B10/40
摘要： Methods and systems for performing signal pre-correction of a transmission signal comprising a sequence of symbols using a Pattern Dependent Look-up Table (PDLUT) containing one or more distortion correction values. Upon accessing a distortion correction value from the PDLUT for a symbol of the sequence of symbols, the accessed distortion correction value is quantized into one or more quantized values according to one or more quantizations, thereby reducing the bit-width of the distortion correction value. The transmission signal and the distortion correction value with reduced bit-width may undergo linear correction compensation, such as through a finite impulse response (FIR) filter, independent of one another, where the one or more quantized correction values with reduced bit-width reduce a number of calculation steps performed during linear correction compensation resulting in power savings. The linearly compensated quantized values and the linearly compensated signal are combined to form a pre-corrected signal.

5. 发明申请

WO2020177439A1 HYBRID DIGITAL MULTI-BAND OPTICAL RECEIVER AND TRANSMITTER 审中-公开
公开(公告)号：WO2020177439A1
公开(公告)日：2020-09-10
申请号：PCT/CN2019/125867
申请日：2019-12-17
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： LI, Chuandong , ZHANG, Zhuhong
IPC分类号： H04B10/25
摘要： A method includes distributing payload data among a master sub-band and a plurality of slave sub-bands. The master sub-band and the plurality of slave sub-bands collectively extend over an allocated frequency spectrum; the master sub-band and the plurality of slave sub-bands are associated with different carrier frequencies; and the master sub-band has a center frequency that corresponds to a center frequency of the allocated frequency spectrum. The method includes generating modulated data for the master sub-band and the plurality of slave sub-bands based on the distributed payload data; and transmitting an optical signal to an optical medium representing the modulated data.

6. 发明申请

WO2018053820A1 SYSTEM AND METHOD FOR CLOCK RECOVERY IN A COHERENT OPTICAL COMMUNICATION SYSTEM 审中-公开
标题翻译：用于相干光通信系统中的时钟恢复的系统和方法
公开(公告)号：WO2018053820A1
公开(公告)日：2018-03-29
申请号：PCT/CN2016/100002
申请日：2016-09-24
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： ZAMANI, Mahdi , TORBATIAN, Mehdi , MITRA, Jeebak , ZHANG, Zhuhong , LI, Chuandong
IPC分类号： H04B10/61
CPC分类号： H04L7/0075 , H04B10/60 , H04B10/613 , H04B10/6161 , H04B10/6166 , H04L7/0029 , H04L7/0278
摘要： The optical channel between a coherent optical transmitter and a coherent optical receiver may include one or more components that act as a bandpass filter with a passband that is narrower than the signal bandwidth. Such a narrow filter may significantly attenuate the signal content close to the band edge of the data signal. As a result, timing error detection may work less effectively, and therefore clock recovery may be less effective or fail. Methods and systems are disclosed in which a single optical carrier is used to transmit a data signal that has multiple bands, and timing error detection is performed at the receiver using one or more inner bands of the multiple bands. The timing error detection may therefore be made more robust to the effects of the narrow filtering.
摘要翻译：相干光发射器和相干光接收器之间的光通道可以包括一个或多个充当带通滤波器的部件，其通带窄于信号带宽。这种窄的滤波器可能会显着衰减接近数据信号的频带边缘的信号内容。结果，定时错误检测可能效果较差，因此时钟恢复可能效率较低或失败。公开了使用单个光载波来传输具有多个频带的数据信号的方法和系统，并且使用多个频带中的一个或多个内频带在接收机处执行定时误差检测。因此，对于窄滤波的影响，定时误差检测可以更加稳健。

7. 发明申请

WO2016112765A1 METHOD AND SYSTEM FOR DISCRETE MULTI-TONE TRANSMISSION WITH MULTIPLE MODULATIONS 审中-公开
标题翻译：用多种调制方式进行离散多路传输的方法与系统
公开(公告)号：WO2016112765A1
公开(公告)日：2016-07-21
申请号：PCT/CN2015/097386
申请日：2015-12-15
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： LI, Chuandong , ZHANG, Zhuhong , ZAMANI, Mahdi
IPC分类号： H04B10/25 , H04L27/00 , H04L1/00
CPC分类号： H04B10/5161 , H04L27/2601
摘要： Optical network devices and method for optical network communications in discrete multi-tone (DMT) are provided. A serial information signal is converted to groups of bits and loaded to parallel processing branches based on bit rates of the parallel processing branches. Each branch is configured to encode the associated group of data bits on the associated tone. A first bit rate and modulation and power allocation to a first branch of the branches may be different from a second bit rate and modulation and power allocation to a second branch of the branches. To recover the incoming data, the encoded signal may be parallel-processed using branches with different demodulation formats and provide the serial data stream.
摘要翻译：提供了离散多音（DMT）光网络通信的光网络设备和方法。基于并行处理分支的比特率，将串行信息信号转换为比特组并加载到并行处理分支。每个分支被配置为对相关联音调上的相关联的数据位组进行编码。对分支的第一分支的第一比特率和调制和功率分配可以不同于第二比特率以及对分支的第二分支的调制和功率分配。为了恢复输入数据，编码信号可以使用具有不同解调格式的分支并行处理并提供串行数据流。

8. 发明申请

WO2015192771A1 METHOD AND APPARATUS FOR RECOVERING TIME-DOMAIN HYBRID MODULATED QAM SIGNALS 审中-公开
标题翻译：用于恢复时域混合调制QAM信号的方法和装置
公开(公告)号：WO2015192771A1
公开(公告)日：2015-12-23
申请号：PCT/CN2015/081575
申请日：2015-06-16
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： ZHANG, Zhuhong , LI, Chuandong
IPC分类号： H04L27/34 , H04B10/2569
CPC分类号： H04L27/38 , H04B10/2569 , H04B10/6971 , H04L25/03891 , H04L27/0008 , H04L27/0014 , H04L27/3488 , H04L2027/0038 , H04L2027/0057 , H04L2027/0067
摘要： A method for recovering a quadrature amplitude modulated (QAM) signal is disclosed. The method includes receiving a QAM signal at a demultiplexers, where the QAM signal comprises multiple modulation schemes, splitting the QAM signal into k branches, where k is the number of QAM modulation schemes of the signal, passing the branch having the lowest order QAM modulation scheme to a first equalizer for recovering and tracking polarization and compensating polarization mode dispersion (PMD), updating a tap updating algorithm with a recovery value determined by the first equalizer, and recovering and tracking polarization and compensating PMD for all other branches based on the recovery value.
摘要翻译：公开了一种用于恢复正交幅度调制（QAM）信号的方法。该方法包括在解复用器处接收QAM信号，其中QAM信号包括多个调制方案，将QAM信号分成k个分支，其中k是信号的QAM调制方案的数量，通过具有最低阶QAM调制的分支方案用于恢复和跟踪偏振和补偿偏振模色散（PMD）的第一均衡器，用由第一均衡器确定的恢复值更新抽头更新算法，以及基于恢复来恢复和跟踪所有其他分支的偏振和补偿PMD 值。

9. 发明申请

WO2015139593A1 TRANSMITTER APPARATUS AND METHOD 审中-公开
标题翻译：发射机装置及方法
公开(公告)号：WO2015139593A1
公开(公告)日：2015-09-24
申请号：PCT/CN2015/074297
申请日：2015-03-16
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： JIANG, Zhiping , CHEN, Chen , ZHANG, Zhuhong , LI, Chuandong
IPC分类号： H04J14/02
CPC分类号： H04B10/532 , H04B10/506 , H04B10/548 , H04B10/5561 , H04B10/5563 , H04J14/02
摘要： An apparatus comprises a digital signal processing module configured to receive a data stream and generate a plurality of digital multiple tones, a plurality of digital-to-analog converters coupled to the digital signal processing module, a plurality of drivers coupled to respective digital-to-analog converters, an electro-optic modulator having inputs coupled to the drivers and outputs coupled to a fiber and a multi-wavelength light source coupled to the electro-optic modulator.
摘要翻译：一种装置包括数字信号处理模块，被配置为接收数据流并产生多个数字多音调，多个数模转换器耦合到数字信号处理模块，多个驱动器耦合到相应的数字 - - 光谱调制器，其具有耦合到驱动器的输入和耦合到光纤的输出和耦合到电光调制器的多波长光源的电光调制器。

10. 发明申请

WO2015120087A1 DIRECT-DETECTED ORTHOGONAL FREQUENCY-DIVISION MULTIPLEXING WITH DISPERSION PRE-COMPENSATION DIGITAL SIGNAL PROCESSING 审中-公开
标题翻译：直接检测正交频分复用与分散预补偿数字信号处理
公开(公告)号：WO2015120087A1
公开(公告)日：2015-08-13
申请号：PCT/US2015/014509
申请日：2015-02-04
申请人： FUTUREWEI TECHNOLOGIES, INC. , HUAWEI TECHNOLOGIES CO., LTD.
发明人： LI, Chuandong , CHEN, Charles, Chen , ZHANG, Zhuhong
IPC分类号： H04J14/00
CPC分类号： H04L27/2628 , H04B10/25137 , H04L25/03343 , H04L27/2634 , H04L27/368
摘要： Chromatic dispersion is pre-compensated in a direct-detected orthogonal frequency-division multiplexed optical transmitter through digital signal processing methods, to generate signals that can be transmitted over an optical fiber. The dispersion pre-compensation digital signal processing may include multiplying subcarriers by a respective factor. The dispersion pre-compensation digital signal processing may instead include application of a finite impulse response filter to signals. The dispersion pre-compensation digital signal processing may instead include fast Fourier transformations of signals, application of a frequency domain filter to signals generated by the fast Fourier transformations, and inverse fast Fourier transformations of the signals produced by application of the frequency domain filter.
摘要翻译：通过数字信号处理方法在直接检测的正交频分复用光发射机中对色散进行预补偿，以产生可以通过光纤传输的信号。色散预补偿数字信号处理可以包括将副载波乘以相应的因子。分散预补偿数字信号处理可以替代地包括对信号应用有限脉冲响应滤波器。色散预补偿数字信号处理可以替代地包括信号的快速傅里叶变换，对由快速傅里叶变换产生的信号应用频域滤波器，以及通过应用频域滤波器产生的信号的快速傅里叶逆变换。

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