公开(公告)号：US20070053384A1

公开(公告)日：2007-03-08

申请号：US11218430

申请日：2005-09-06

申请人： Kim Roberts ,  Chandra Bontu ,  James Harley

发明人： Kim Roberts ,  Chandra Bontu ,  James Harley

IPC分类号： H04J3/06

CPC分类号： H04J3/076 ,  H04L1/205

摘要： A method of minimizing jitter in a system for rate adapting a data signal for transport through a synchronous network. A phase difference is measured between a data clock synchronous with the data signal and a local clock of the synchronous network. A timing reference (F) indicative of a frequency difference between the asynchronous data signal and the local clock is measured using the measured phase difference. Calculation of the timing reference includes compensating ambiguity in the measured phase difference.

摘要翻译： 一种使系统中的抖动最小化的方法，用于速率调整用于通过同步网络传输的数据信号。 在与数据信号同步的数据时钟与同步网络的本地时钟之间测量相位差。 使用测量的相位差来测量表示异步数据信号与本地时钟之间的频率差的定时参考（F）。 定时参考的计算包括补偿测量相位差的模糊度。

公开(公告)号：US20060285855A1

公开(公告)日：2006-12-21

申请号：US11315345

申请日：2005-12-23

申请人： Han Sun ,  Slobodan Jovanovic ,  Kuang Wu ,  Chandra Bontu ,  Kim Roberts ,  Jianzhong Xu

发明人： Han Sun ,  Slobodan Jovanovic ,  Kuang Wu ,  Chandra Bontu ,  Kim Roberts ,  Jianzhong Xu

IPC分类号： H04B10/00

CPC分类号： H04B10/508 ,  H03L7/085 ,  H03L2207/06 ,  H04J14/06 ,  H04L7/0029 ,  H04L7/0083 ,  H04L7/0278

摘要： A method of recovering a clock signal from an optical signal received through an optical communications system. A digital sample stream is processed to generate a dispersion compensated signal. The dispersion compensated signal is then tapped to obtain upper side band and lower side, band signals of each received polarization of the optical signal. The upper side band sand lower side band signals are then processed to compensate polarization dependent impairments and the clock recovered from the resulting optimized.

摘要翻译： 一种从通过光通信系统接收的光信号中恢复时钟信号的方法。 处理数字样本流以产生色散补偿信号。 然后分散色散补偿信号以获得光信号的每个接收极化的上边带和下侧的带信号。 然后处理上边带砂下边带信号以补偿偏振相关损伤，并从所得优化中恢复时钟。

公开(公告)号：US20060285854A1

公开(公告)日：2006-12-21

申请号：US11315342

申请日：2005-12-23

申请人： Han Sun ,  Slobodan Jovanovic ,  Kuang Wu ,  Chandra Bontu ,  Kim Roberts ,  Jianzhong Xu

发明人： Han Sun ,  Slobodan Jovanovic ,  Kuang Wu ,  Chandra Bontu ,  Kim Roberts ,  Jianzhong Xu

IPC分类号： H04B10/00

CPC分类号： H04B10/508 ,  H03L7/085 ,  H03L2207/06 ,  H04J14/06 ,  H04L7/0029 ,  H04L7/0083 ,  H04L7/0278

摘要： A method of recovering a clock signal from an optical signal received through an optical communications system. A digital sample stream is processed to generate a dispersion compensated signal. The dispersion compensated signal is then tapped to obtain upper side band and lower side band signals of each received polarization of the optical signal. The upper side band and lower side band signals are then processed to compensate polarization dependent impairments, and the clock recovered from the resulting optimized.

公开(公告)号：US20070092260A1

公开(公告)日：2007-04-26

申请号：US11328199

申请日：2006-01-10

申请人： Chandra Bontu ,  Kuang Wu ,  John McNicol ,  Kim Roberts ,  Han Sun

发明人： Chandra Bontu ,  Kuang Wu ,  John McNicol ,  Kim Roberts ,  Han Sun

IPC分类号： H04B10/00

CPC分类号： H04J3/0608 ,  H04J14/06 ,  H04L7/027 ,  H04L7/0278 ,  H04L7/048

摘要： A method of a conveying data through an optical communications system. An optical signal is received through the optical communication system, the optical signal comprising data symbols and SYNC bursts, each SYNC burst having a predetermined symbol sequence. The received optical signal is oversampled to generate a multi-bit sample stream. The sample stream is partitioned into blocks of contiguous samples, wherein each block of samples partially overlaps at least one other block of samples and encompasses at least one SYNC burst and a plurality of data symbols. Each block of samples is independently processed to detect a value of each data symbol.

摘要翻译： 一种通过光通信系统传送数据的方法。 通过光通信系统接收光信号，光信号包括数据符号和SYNC脉冲串，每个SYNC脉冲串具有预定的符号序列。 所接收的光信号被过采样以产生多比特采样流。 样本流被划分为连续样本块，其中每个样本块与至少一个其他样本块部分重叠，并且包含至少一个SYNC突发和多个数据符号。 每个样本块被独立地处理以检测每个数据符号的值。

公开(公告)号：US20070092259A1

公开(公告)日：2007-04-26

申请号：US11294613

申请日：2005-12-06

申请人： Chandra Bontu ,  Maurice O'Sullivan ,  Kim Roberts ,  Han Sun ,  Kuang Wu

发明人： Chandra Bontu ,  Maurice O'Sullivan ,  Kim Roberts ,  Han Sun ,  Kuang Wu

IPC分类号： H04B10/12

CPC分类号： H04B10/2572 ,  H04B10/60 ,  H04B10/6161 ,  H04B10/6162 ,  H04B10/64 ,  H04J14/06 ,  H04L7/041

摘要： A method of processing a stream of digital samples of an optical signal received by a coherent optical receiver. The digital sample stream is processed to generate a dispersion compensated sample stream. The dispersion compensated sample stream is then processed to compensate polarization dependent impairments of the optical signal.

摘要翻译： 一种处理由相干光接收机接收的光信号的数字样本流的方法。 数字样本流被处理以产生色散补偿样本流。 然后处理色散补偿采样流以补偿光信号的偏振相关损伤。

公开(公告)号：US09520950B2

公开(公告)日：2016-12-13

申请号：US12330691

申请日：2008-12-09

申请人： James Harley ,  Kim Roberts ,  Chuandong Li

发明人： James Harley ,  Kim Roberts ,  Chuandong Li

IPC分类号： H04B10/00 ,  H04B10/532 ,  H04B10/2513 ,  H04B10/69

CPC分类号： H04B10/532 ,  H04B10/25137 ,  H04B10/6972 ,  H04B2210/252 ,  H04B2210/254

摘要： Described are an optical communications system and a method that allow for compensation of chromatic dispersion and polarization mode dispersion imparted to a communications signal propagating through an optical link. The system is based on a cost-effective optical transport architecture that accommodates baud rates exceeding 15 Gbaud and eliminates the need for costly optical dispersion compensators. Compensation for polarization mode dispersion is performed at the receiver using nonlinear processing. Advantageously, direct detection modulation using inexpensive electro-optic system components can be used in place of more costly and complex coherent and differential modulation formats. Digital filtering can be performed at the transmitter and the input signal can be inverted based on the nonlinearity of the transmitter electro-optic components. Consequently, the bandwidth and linearity requirements for the transmitter electro-optic components are relaxed, and cost reductions are realized.

摘要翻译： 描述了允许补偿通过光链路传播的通信信号的色散和偏振模色散的光通信系统和方法。 该系统基于具有成本效益的光学传输架构，其适应波特率超过15Gbaud，并且不需要昂贵的光学色散补偿器。 使用非线性处理在接收机处执行偏振模色散的补偿。 有利地，可以使用廉价的电光系统组件的直接检测调制来代替更昂贵和复杂的相干和差分调制格式。 可以在发射机处执行数字滤波，并且可以基于发射机电光部件的非线性来反转输入信号。 因此，放大了发射机电光元件的带宽和线性要求，并实现成本降低。

公开(公告)号：US20090304391A1

公开(公告)日：2009-12-10

申请号：US12330691

申请日：2008-12-09

申请人： James Harley ,  Kim Roberts ,  Chuandong Li

发明人： James Harley ,  Kim Roberts ,  Chuandong Li

IPC分类号： H04B10/12

CPC分类号： H04B10/532 ,  H04B10/25137 ,  H04B10/6972 ,  H04B2210/252 ,  H04B2210/254

摘要： Described are an optical communications system and a method that allow for compensation of chromatic dispersion and polarization mode dispersion imparted to a communications signal propagating through an optical link. The system is based on a cost-effective optical transport architecture that accommodates baud rates exceeding 15 Gbaud and eliminates the need for costly optical dispersion compensators. Compensation for polarization mode dispersion is performed at the receiver using nonlinear processing. Advantageously, direct detection modulation using inexpensive electro-optic system components can be used in place of more costly and complex coherent and differential modulation formats. Digital filtering can be performed at the transmitter and the input signal can be inverted based on the nonlinearity of the transmitter electro-optic components. Consequently, the bandwidth and linearity requirements for the transmitter electro-optic components are relaxed, and cost reductions are realized.

摘要翻译： 描述了允许对通过光链路传播的通信信号赋予色散和偏振模色散的补偿的光通信系统和方法。 该系统基于具有成本效益的光学传输架构，其适应波特率超过15Gbaud，并且不需要昂贵的光学色散补偿器。 使用非线性处理在接收机处执行偏振模色散的补偿。 有利地，可以使用廉价的电光系统组件的直接检测调制来代替更昂贵和复杂的相干和差分调制格式。 可以在发射机处执行数字滤波，并且可以基于发射机电光部件的非线性来反转输入信号。 因此，放大了发射机电光元件的带宽和线性要求，并实现成本降低。

公开(公告)号：US07266306B1

公开(公告)日：2007-09-04

申请号：US10677276

申请日：2003-10-03

申请人： James Harley ,  Kim Roberts

发明人： James Harley ,  Kim Roberts

IPC分类号： H04B10/04

CPC分类号： H04B10/5165 ,  H04B10/505 ,  H04B10/5053 ,  H04B10/50575 ,  H04B10/50577

摘要： A suppressed carrier optical communications signal is generated by driving (biasing) an optical modulator capable of complex modulation of an optical carrier signal to a bias point near a zero-crossing point of the modulator's E-field response. A complex input signal is then used to drive excursions of the E-field response to impress the input signal onto the optical carrier. The resulting lightwave emerging from the complex modulator exhibits an optical spectrum characterized by a pair of sidebands and a strongly suppressed carrier. Bias control of the complex modulator is implemented on the basis of the optical power detected at the output of the complex modulator. This enables the optical modulator to be treated as a “black box”, in that calculation of the bias signals does not relay on knowledge of the precise performance characteristics of the modulator.

摘要翻译： 通过驱动（偏置）能够将光载波信号复调制的光调制器驱动（偏置）到调制器的E场响应的过零点附近的偏置点来产生抑制的载波光通信信号。 然后使用复数输入信号来驱动电场响应的偏移，以将输入信号压入光载体上。 从复合调制器出现的所得光波表现出以一对边带和强抑制载体为特征的光谱。 基于在复调制器的输出处检测到的光功率来实现复调制器的偏置控制。 这使得光调制器被视为“黑匣子”，因为偏置信号的计算不会对对调制器的精确性能特性的了解而继续进行。

公开(公告)号：US20050002403A1

公开(公告)日：2005-01-06

申请号：US10609562

申请日：2003-07-01

申请人： Kim Roberts ,  James Harley ,  Philippe Neusy ,  Michael Mayer

发明人： Kim Roberts ,  James Harley ,  Philippe Neusy ,  Michael Mayer

IPC分类号： H04J3/06 ,  H04J3/07 ,  H04L12/28

CPC分类号： H04J3/076

摘要： In a method of estimating a bit rate (f1) of a digital signal conveyed through a SONET network between an originating node and a terminating node, the digital signal received by the originating node is processed to determine a result of a first function of the signal bit rate (f1) and a respective Tx local reference frequency (f2) of the originating node. A result of a second function of the Tx local reference frequency (f2) and a respective Rx local reference frequency (f3) of the terminating node is calculated. Finally, a result of a third function of the respective first and second function results is calculated, to derive an estimate of the signal bit rate (f4) relative to the Rx local reference frequency (f3).

摘要翻译： 在估计通过始发节点和终止节点之间的SONET网络传送的数字信号的比特率（f1）的方法中，处理由始发节点接收的数字信号以确定信号的第一功能的结果 比特率（f1）和相应的Tx本地参考频率（f2）。 计算终端节点的Tx本地参考频率（f2）和相应Rx本地参考频率（f3）的第二功能的结果。 最后，计算相应的第一和第二功能结果的第三功能的结果，以导出相对于Rx本地参考频率（f3）的信号比特率（f4）的估计。

公开(公告)号：US07676161B2

公开(公告)日：2010-03-09

申请号：US11008515

申请日：2004-12-10

申请人： Kim Roberts ,  James Harley

发明人： Kim Roberts ,  James Harley

IPC分类号： H04B10/00

CPC分类号： H04B10/5053 ,  H04B10/505 ,  H04B10/5055 ,  H04B10/50572 ,  H04B10/50575 ,  H04B10/58

摘要： In a method of synthesizing an optical signal, a multi-bit digital representation of a desired optical E-field is generated. The multi-bit digital representation has a resolution of N1-bits, where N1 is an integer greater than 2. At least two analog drive signals are synthesized based on the multi-bit digital representation. Each analog drive signal exhibits excursions between 2M discrete states (i.e. has a resolution of M-bits), where M is an integer greater than 2. An electrical-to-optical (E/O) converter is driven using the analog drive signals to generate an output optical E-field at an output of the E/O converter. An error is detected between the output optical E-field and the desired complex E-field waveform, and at least one parameter adjusted so as to minimize the detected error.

摘要翻译： 在合成光信号的方法中，产生期望的光电场的多位数字表示。 多位数字表示具有N1位的分辨率，其中N1是大于2的整数。至少两个模拟驱动信号基于多位数字表示被合成。 每个模拟驱动信号表现出2M离散状态之间的偏移（即，具有M位的分辨率），其中M是大于2的整数。使用模拟驱动信号驱动电 - 光（E / O）转换器 在E / O转换器的输出端产生输出光电场。 在输出光电场和期望的复电场场波形之间检测到误差，并且调整至少一个参数以使检测到的误差最小化。