公开(公告)号：US08705986B2

公开(公告)日：2014-04-22

申请号：US12926533

申请日：2010-11-23

申请人： Han Henry Sun ,  Kuang-Tsan Wu

发明人： Han Henry Sun ,  Kuang-Tsan Wu

IPC分类号： H04B10/64

CPC分类号： H04B10/6161 ,  H04B10/6162

摘要： Consistent with the present disclosure, a method and system for estimating chromatic dispersion of an optical signal in a coherent receiver is provided that is insensitive to polarization mode dispersion (PMD) and other polarization effects in the optical communication system. The effects of chromatic dispersion in the optical system are estimated by first calculating a phase shift between a pair of related frequency domain data outputs of a Fourier transform circuit. The calculated phase shift includes a linear phase component that is proportional to the chromatic dispersion, a DC constant phase component, and a data spectrum component. The calculated phase shift is then averaged over a number of clock cycles to remove the data spectrum components. The time averaged result is used to normalize any effects of PMD from the received signal. A slope of the linear phase component as a function of frequency is then calculated and used to estimate the value for chromatic dispersion. The chromatic dispersion estimate is then used to determine a number of coefficients of an inverse frequency response of the chromatic dispersion in the system, and is used to compensate for the chromatic dispersion.

摘要翻译： 根据本公开，提供了一种用于估计相干接收机中的光信号的色散的方法和系统，其对于光通信系统中的偏振模色散（PMD）和其它极化效应不敏感。 通过首先计算傅里叶变换电路的一对相关频域数据输出之间的相移来估计光学系统中色散的影响。 所计算的相移包括与色散成比例的直线相位分量，DC恒定相位分量和数据光谱分量。 然后在多个时钟周期内对所计算的相移进行平均以去除数据光谱分量。 时间平均结果用于对接收到的信号的PMD的任何影响进行归一化。 然后计算作为频率的函数的线性相位分量的斜率，并用于估计色散的值。 然后使用色散估计来确定系统中色散的反频率响应的系数数，并且用于补偿色散。

公开(公告)号：US20110291865A1

公开(公告)日：2011-12-01

申请号：US12791694

申请日：2010-06-01

申请人： Han Henry Sun ,  Kuang-Tsan Wu ,  Yuejian Wu ,  Sandy Thomson ,  John D. McNicol ,  David J. Krause

发明人： Han Henry Sun ,  Kuang-Tsan Wu ,  Yuejian Wu ,  Sandy Thomson ,  John D. McNicol ,  David J. Krause

IPC分类号： H03M7/00

CPC分类号： H03H17/0621 ,  H03H17/0685 ,  H03H2017/0298

摘要： A system, method, and apparatus is disclosed for interpolation of an output of an analog to digital converter (ADC) to enable operation of the ADC at a sampling rate that is independent of the sampling rate for a DSP core so as to efficiently enable operation at higher date rates. According to one of the embodiments, an interpolation circuit is coupled between the ADC and DSP core and receives a first plurality of samples of data at the first data rate from the ADC and supplies a plurality of samples of second data at a second data rate to the DSP core; the second data rate being less than the first data rate. According to one of the embodiments, the interpolation circuit includes a memory and a FIR filter circuit having filter tap coefficient values selected to provide attenuation at high frequencies to reduce aliasing noise.

摘要翻译： 公开了一种用于对模数转换器（ADC）的输出进行插值的系统，方法和装置，以使得能够以独立于DSP核的采样率的采样速率对ADC进行操作，以便有效地使能操作 以较高的日期率。 根据实施例之一，内插电路耦合在ADC和DSP内核之间，并从ADC接收第一数据速率的第一多个数据采样，并将第二数据的多个样本以第二数据速率提供给 DSP内核; 第二数据速率小于第一数据速率。 根据实施例中的一个，内插电路包括存储器和具有滤波器抽头系数值的FIR滤波器电路，该滤波器抽头系数值被选择以在高频率下提供衰减以减少混叠噪声。

公开(公告)号：US09166689B2

公开(公告)日：2015-10-20

申请号：US13536291

申请日：2012-06-28

申请人： Han Henry Sun ,  Kuang-Tsan Wu ,  Pierre Mertz

发明人： Han Henry Sun ,  Kuang-Tsan Wu ,  Pierre Mertz

IPC分类号： H04B10/00 ,  H04B10/2507 ,  H04B10/532 ,  H04B10/54 ,  H04B10/61

CPC分类号： H04B10/25073 ,  H04B10/532 ,  H04B10/541 ,  H04B10/616

摘要： A system receives four-bit symbols that correspond to traffic associated with a three-bit phase modulation scheme and are encoded based on a four-bit phase modulation scheme. The system determines values with which to perform equalization that enable the four-bit symbols to be restored to a condition that existed prior to being transmitted to the system. The system performs, using the values, equalization on a four-bit symbol that includes at least a first pair of bits associated with a first polarization, and performs, after completing the equalization, another equalization on another four-bit symbol that includes at least a second pair of bits associated with a second polarization. The system identifies a three-bit symbol, of a set of three-bit symbols associated with the three-bit phase modulation scheme, based on the equalized first pair of bits and the equalized second pair of bits, generates the three-bit symbol, and outputs the three-bit symbol.

摘要翻译： 系统接收对应于与三位相位调制方案相关联的业务的四位符号，并且基于四位相位调制方案进行编码。 系统确定用于执行均衡的值，使得能够将四位符号恢复到在传输到系统之前存在的条件。 该系统使用这些值对包含与第一极化相关联的至少第一比特对的四比特符号进行均衡，并且在完成均衡之后执行另一个四比特符号上的至少包括至少 与第二极化相关联的第二对位。 基于均衡的第一比特对和均衡的第二比特对，系统识别与三位相位调制方案相关联的一组三比特符号的三比特符号，生成三比特符号， 并输出三位符号。

公开(公告)号：US08774320B2

公开(公告)日：2014-07-08

申请号：US12824490

申请日：2010-06-28

申请人： Han Henry Sun ,  Kuang-Tsan Wu

发明人： Han Henry Sun ,  Kuang-Tsan Wu

IPC分类号： H04L27/00

CPC分类号： H04B10/6165 ,  H04B10/611 ,  H04B10/612 ,  H04B10/613

摘要： Consistent with the present disclosure, optical signals are modulated in accordance with a higher order QAM modulation format, such as 8-QAM, to carry customer data, for example. The optical signals are converted to corresponding electrical signals, which are then subject to further processing. In particular, phase data associated with the higher order QAM constellation is processed, such that the outer points of the constellation are rotated to have the same phase as the inner points. As a result, both the inner and outer points resemble a constellation, and both may be more readily processed using feedforward or feedback carrier recovery. After such carrier recovery, the phase data is further processed so that the outer points are rotated back and the customer data can be extracted from the phase data.

摘要翻译： 与本公开一致，例如根据诸如8-QAM的更高阶QAM调制格式来调制光信号以承载客户数据。 光信号被转换成相应的电信号，然后进行进一步的处理。 特别地，处理与高阶QAM星座相关联的相位数据，使得星座的外部点被旋转以具有与内部点相同的相位。 结果，内点和外部点都类似于星座，并且两者可以使用前馈或反馈载波恢复更容易地进行处理。 在这种载波恢复之后，进一步处理相位数据，使得外点被回转并且可以从相位数据中提取客户数据。

公开(公告)号：US08631305B2

公开(公告)日：2014-01-14

申请号：US13435823

申请日：2012-03-30

申请人： Stanley H. Blakey ,  Han Henry Sun ,  Yuejian Wu

发明人： Stanley H. Blakey ,  Han Henry Sun ,  Yuejian Wu

IPC分类号： H03M13/00

CPC分类号： H04B10/00 ,  H04L1/0045

摘要： A system is configured to receive a word that includes a group of samples; randomly select a subset of the samples; identify first samples, from the subset, with a lowest level of reliability; select another subset of the samples; identify second samples, from the other subset, with a lowest level of reliability; and create a merged subset based on selected first samples and selected second samples. The system is also configured to select a further subset of the samples; identify third samples, from the further subset, with a lowest level of reliability; identify fourth samples, from the merged subset, associated with a lowest level of reliability; create another merged subset based on a greater probability that fourth samples than third samples are included in the other merged subset; and generate another word based a sample from the other merged subset; and process the word using the other word.

摘要翻译： 系统被配置为接收包括一组样本的单词; 随机选择样本的一个子集; 从子集中识别具有最低可靠性水平的第一个样本; 选择样品的另一个子集; 从另一个子集中识别具有最低可靠性水平的第二个样本; 并基于所选择的第一样本和所选择的第二样本创建合并的子集。 该系统还被配置为选择样本的另一子集; 从另一个子集中确定具有最低可靠性水平的第三个样本; 从合并的子集中确定与最低可靠性相关联的第四个样本; 基于第四个样本比第三个样本包含在另一个合并子集中更大的概率，创建另一个合并子集; 并根据来自其他合并子集的样本生成另一个单词; 并使用其他单词处理单词。

公开(公告)号：US20140003814A1

公开(公告)日：2014-01-02

申请号：US13537634

申请日：2012-06-29

申请人： Han Henry SUN ,  Kuang-Tsan Wu

发明人： Han Henry SUN ,  Kuang-Tsan Wu

IPC分类号： H04B10/06 ,  H04J14/06

CPC分类号： H04J14/06 ,  H04B10/541 ,  H04B10/5561 ,  H04B10/612 ,  H04L27/223

摘要： A system receives traffic that includes four-bit symbols, the four-bit symbols being encoded using a four-bit phase modulation scheme; and processes the traffic to recover a four-bit symbol. The system also decodes the recovered four-bit symbol to obtain a three-bit symbol. The three-bit symbol is associated with a three-quadrature amplitude modulation (3QAM) scheme, and the decoding is performed without creating an error, within the traffic, when cycle slip occurs. The system outputs the traffic based on the three-bit symbol.

摘要翻译： 系统接收包含四位符号的业务，四位符号使用四位相位调制方案进行编码; 并处理流量以恢复四位符号。 该系统还解码恢复的四位符号以获得三位符号。 三比特符号与三正交幅度调制（3QAM）方案相关联，并且当周期滑移发生时，在业务中执行解码而不产生错误。 系统根据三位符号输出流量。

公开(公告)号：US20130259492A1

公开(公告)日：2013-10-03

申请号：US13435823

申请日：2012-03-30

申请人： Stanley H. Blakey ,  Han Henry Sun ,  Yuejian Wu

发明人： Stanley H. Blakey ,  Han Henry Sun ,  Yuejian Wu

IPC分类号： H04B10/06

CPC分类号： H04B10/00 ,  H04L1/0045

摘要： A system is configured to receive a word that includes a group of samples; randomly select a subset of the samples; identify first samples, from the subset, with a lowest level of reliability; select another subset of the samples; identify second samples, from the other subset, with a lowest level of reliability; and create a merged subset based on selected first samples and selected second samples. The system is also configured to select a further subset of the samples; identify third samples, from the further subset, with a lowest level of reliability; identify fourth samples, from the merged subset, associated with a lowest level of reliability; create another merged subset based on a greater probability that fourth samples than third samples are included in the other merged subset; and generate another word based a sample from the other merged subset; and process the word using the other word.

摘要翻译： 系统被配置为接收包括一组样本的单词; 随机选择样本的一个子集; 从子集中确定具有最低可靠性水平的第一个样本; 选择样品的另一个子集; 从另一个子集中识别具有最低可靠性水平的第二个样本; 并基于所选择的第一样本和所选择的第二样本创建合并的子集。 该系统还被配置为选择样本的另一子集; 从另一个子集中确定具有最低可靠性水平的第三个样本; 从合并的子集中确定与最低可靠性相关联的第四个样本; 基于第四个样本比第三个样本包含在另一个合并子集中更大的概率，创建另一个合并子集; 并根据来自其他合并子集的样本生成另一个单词; 并使用其他单词来处理该单词。

公开(公告)号：US08477056B2

公开(公告)日：2013-07-02

申请号：US12791694

申请日：2010-06-01

申请人： Han Henry Sun ,  Kuang-Tsan Wu ,  Yuejian Wu ,  Sandy Thomson ,  John D. McNicol ,  David J. Krause

发明人： Han Henry Sun ,  Kuang-Tsan Wu ,  Yuejian Wu ,  Sandy Thomson ,  John D. McNicol ,  David J. Krause

IPC分类号： H03M1/12

CPC分类号： H03H17/0621 ,  H03H17/0685 ,  H03H2017/0298

摘要： A system, method, and apparatus is disclosed for interpolation of an output of an analog to digital converter (ADC) to enable operation of the ADC at a sampling rate that is independent of the sampling rate for a DSP core so as to efficiently enable operation at higher date rates. According to one of the embodiments, an interpolation circuit is coupled between the ADC and DSP core and receives a first plurality of samples of data at the first data rate from the ADC and supplies a plurality of samples of second data at a second data rate to the DSP core; the second data rate being less than the first data rate. According to one of the embodiments, the interpolation circuit includes a memory and a FIR filter circuit having filter tap coefficient values selected to provide attenuation at high frequencies to reduce aliasing noise.

摘要翻译： 公开了一种用于对模数转换器（ADC）的输出进行插值的系统，方法和装置，以使得能够以独立于DSP核的采样率的采样速率对ADC进行操作，以便有效地使能操作 以较高的日期率。 根据实施例之一，内插电路耦合在ADC和DSP内核之间，并从ADC接收第一数据速率的第一多个数据采样，并将第二数据的多个样本以第二数据速率提供给 DSP内核; 第二数据速率小于第一数据速率。 根据实施例中的一个，内插电路包括存储器和具有滤波器抽头系数值的FIR滤波器电路，该滤波器抽头系数值被选择以在高频率下提供衰减以减少混叠噪声。

公开(公告)号：US20130022147A1

公开(公告)日：2013-01-24

申请号：US13250462

申请日：2011-09-30

申请人： Han Henry SUN ,  Kuang-Tsan WU ,  Yuejian WU ,  Sandy THOMSON

发明人： Han Henry SUN ,  Kuang-Tsan WU ,  Yuejian WU ,  Sandy THOMSON

IPC分类号： H04L27/22 ,  H04B15/00

CPC分类号： H04B10/6165 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0071 ,  H04L1/20 ,  H04L1/244 ,  H04L27/223

摘要： A system is configured to receive a block of symbols, associated with a phase-modulated signal that includes data symbols that correspond to a payload associated with the signal, and control symbols; process the control symbols to identify an amount of phase noise associated with the control symbols; reset a phase, associated with each of the data symbols, based on the amount of phase noise and a reference phase; interleave the respective data samples, of each of the data symbols with other data samples, where the interleaved respective data samples cause errors, associated with the respective data samples, to be spread out among the other data samples and reduces an error rate relative to a prior data rate that existed before the interleaving; and perform forward error correction on the interleaved respective data samples.

摘要翻译： 系统被配置为接收与包括对应于与所述信号相关联的有效载荷的数据符号的相位调制信号和控制符号相关联的符号块; 处理控制符号以识别与控制符号相关联的相位噪声量; 基于相位噪声量和参考相位复位与每个数据符号相关联的相位; 将每个数据符号的各个数据样本与其他数据样本进行交织，其中交织的相应数据样本导致与各个数据样本相关联的错误，在其他数据样本中展开，并减少相对于 在交织之前存在的先前数据速率; 并对交错的各个数据样本执行前向纠错。

公开(公告)号：US09900104B2

公开(公告)日：2018-02-20

申请号：US13078893

申请日：2011-04-01

申请人： John D. McNicol ,  Kuang-Tsan Wu ,  Han Henry Sun

发明人： John D. McNicol ,  Kuang-Tsan Wu ,  Han Henry Sun

IPC分类号： H04J14/02 ,  H04B10/50 ,  H04B10/67 ,  H04B10/516 ,  H04J14/06

CPC分类号： H04B10/506 ,  H04B10/5161 ,  H04B10/675 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0256 ,  H04J14/026 ,  H04J14/06

摘要： Consistent with the present disclosure, data, in digital form, is received by a transmit node of an optical communication system, and converted to an analog signal by a digital-to-analog converter (DAC) to drive a modulator. The modulator, in turn, modulates light at one of a plurality of wavelengths in accordance with the received data forming a plurality of corresponding carriers. The carriers are modulated according to one of a plurality of modulation formats and then optically combined to form a superchannel of a constant maximum capacity, for example. Accordingly, the number of carriers and the bit rate for each carrier remain constant for each modulation format to realize a constant maximum capacity. The superchannel is then transmitted over an optical communication path to a receive node. At the receive node, the superchannel is optically demultiplexed from a plurality of other superchannels. The plurality of carriers of the superchannel are then supplied to a photodetector circuit, which receives additional light at one of the optical signal carrier wavelengths from a local oscillator laser. An analog-to-digital converter (ADC) is provided in the receive node to convert the electrical signals output from the photodetector into digital form. The output from the ADC is then filtered in the electrical domain, such that optical demultiplexing of the carriers is unnecessary.