公开(公告)号：US07382984B2

公开(公告)日：2008-06-03

申请号：US10262944

申请日：2002-10-03

申请人： John McNicol ,  Kieran Parsons ,  Leo Strawczynski ,  Kim B. Roberts

发明人： John McNicol ,  Kieran Parsons ,  Leo Strawczynski ,  Kim B. Roberts

IPC分类号： H04B10/12 ,  H04B10/00 ,  H04B10/04

CPC分类号： H04B10/07951 ,  H04B10/07953 ,  H04B10/25137 ,  H04B10/505 ,  H04B10/50597 ,  H04B10/508 ,  H04B10/6161

摘要： Optical dispersion imposed on a communications signal conveyed through an optical communications system is compensated by modulating the communications signal in the electrical domain. A compensation function is determined that substantially mitigates the chromatic dispersion. The communications signal is then modulated in the electrical domain using the compensation function. Electrical domain compensation can be implemented in either the transmitter or the receiver end of the communications system. In preferred embodiments, compensation is implemented in the transmitter, using a look-up-table and digital-to-analog converter to generate an electrical predistorted signal. The electrical predistorted signal is then used to modulate an optical source to generate a corresponding predistorted optical signal for transmission through the optical communications system.

摘要翻译： 施加在通过光通信系统传送的通信信号上的光色散通过调制电域中的通信信号来补偿。 确定基本上减轻色散的补偿功能。 然后使用补偿功能在电域中调制通信信号。 可以在通信系统的发射机或接收机端实现电域补偿。 在优选实施例中，使用查找表和数模转换器来在发射机中实现补偿以产生电预失真信号。 然后，电预失真信号用于调制光源以产生用于通过光通信系统传输的相应的预失真光信号。

公开(公告)号：US09559778B2

公开(公告)日：2017-01-31

申请号：US10531314

申请日：2003-07-11

申请人： John McNicol ,  Kieran Parsons ,  Leo Strawczynski ,  Kim B. Roberts ,  Maurice S. O'Sullivan

发明人： John McNicol ,  Kieran Parsons ,  Leo Strawczynski ,  Kim B. Roberts ,  Maurice S. O'Sullivan

IPC分类号： H04B10/516 ,  H04B10/50 ,  H04B10/2513 ,  H04B10/508

CPC分类号： H04B10/07951 ,  H04B10/07953 ,  H04B10/25137 ,  H04B10/505 ,  H04B10/50597 ,  H04B10/508 ,  H04B10/6161

摘要： Optical dispersion imposed on a communications signal conveyed through an optical communications system is compensated by modulating the communications signal in the electrical domain. A compensation function is determined that substantially mitigates the chromatic dispersion. The communications signal is then modulated in the electrical domain using the compensation function. In preferred embodiments, compensation is implemented in the transmitter, using a look-up-table and digital-to-analog converter to generate an electrical predistorted signal. The electrical predistorted signal is then used to modulate an optical source to generate a corresponding predistorted optical signal for transmission through the optical communications system.

摘要翻译： 施加在通过光通信系统传送的通信信号上的光色散通过调制电域中的通信信号来补偿。 确定基本上减轻色散的补偿功能。 然后使用补偿功能在电域中调制通信信号。 在优选实施例中，使用查找表和数模转换器来在发射机中实现补偿以产生电预失真信号。 然后，电预失真信号用于调制光源以产生用于通过光通信系统传输的相应的预失真光信号。

公开(公告)号：US07382985B2

公开(公告)日：2008-06-03

申请号：US10307466

申请日：2002-12-02

申请人： Kim B. Roberts ,  Leo Strawczynski ,  Adrien Comeau ,  John McNicol ,  Maurice O'Sullivan ,  Kieran Parsons

发明人： Kim B. Roberts ,  Leo Strawczynski ,  Adrien Comeau ,  John McNicol ,  Maurice O'Sullivan ,  Kieran Parsons

IPC分类号： H04B10/00 ,  H04B10/12 ,  H04B10/04

CPC分类号： H04B10/25137 ,  H04B10/2572

摘要： Polarization Dependent Effects (PDEs), including Polarization Mode Dispersion (PMD) and Polarization Dependent Loss (PDL) imposed on optical signals conveyed through an optical link are compensated by processing an input signal in the electrical domain prior to transmission. A compensation function is derived that at least partially compensates the PDEs. The communications signal is then processed in the electrical domain using the compensation function to generate an electrical predistorted signal. The electrical predistorted signal is then used to modulate an optical source to generate a corresponding predistorted optical signal for transmission through the optical link. The PDEs of the optical link operate of the predistorted optical signal such at that substantially undistorted optical signal is received at a receiving end of the link.

摘要翻译： 通过在传输之前处理电域中的输入信号，来补偿施加在通过光链路传送的光信号上的极化相关效应（PDE），包括极化模式色散（PMD）和极化相关损耗（PDL）。 导出补偿功能，至少部分补偿PDE。 然后使用补偿功能在电域中处理通信信号以产生电预失真信号。 然后，电预失真信号用于调制光源以产生用于通过光链路传输的相应的预失真光信号。 光链路的PDE操作预失真的光信号，因为在链路的接收端处接收到基本上未失真的光信号。

公开(公告)号：US07356256B1

公开(公告)日：2008-04-08

申请号：US10629834

申请日：2003-07-30

申请人： Leo Strawczynski ,  Kim B. Roberts ,  John McNicol

发明人： Leo Strawczynski ,  Kim B. Roberts ,  John McNicol

IPC分类号： H04B10/08

CPC分类号： H04B10/077 ,  H04B10/07955 ,  H04B2210/258

摘要： A digital performance monitoring method and system for an optical communications system utilizes a channel monitor and a digital signal processor (DSP). The channel monitor is designed to monitor a respective channel signal of the optical communications system, and includes a sample memory for storing sample data including a set of sequential N-bit (where N>1) samples generated by an Analog-to-Digital (A/D) converter at a predetermined sample rate. The digital signal processor (DSP) is designed to calculate at least one performance parameter of the optical communications system based on the stored sample data. The sample rate of the A/D converter is at least equal to a baud rate of the channel, and preferably satisfies the Nyquist criterion. Multiple A/D converters may be used parallel to sample respective orthogonal components of the channel signal. In this case, the stored sample data may be representative of the complex E-field of the channel signal.

摘要翻译： 用于光通信系统的数字性能监测方法和系统利用信道监视器和数字信号处理器（DSP）。 信道监视器被设计为监视光通信系统的相应信道信号，并且包括用于存储样本数据的采样存储器，该采样数据包括由模数（数字）信号产生的一组顺序N位（其中N≥1） A / D）转换器。 数字信号处理器（DSP）被设计为基于存储的采样数据来计算光通信系统的至少一个性能参数。 A / D转换器的采样率至少等于通道的波特率，并且优选地满足奈奎斯特准则。 可以并行地使用多个A / D转换器来采样信道信号的各个正交分量。 在这种情况下，存储的采样数据可以表示信道信号的复电场。

公开(公告)号：US07680420B1

公开(公告)日：2010-03-16

申请号：US10872850

申请日：2004-06-21

申请人： Dave Walker ,  Kim B. Roberts ,  Maurice O'Sullivan ,  Leo Strawczynski ,  James Whiteaway ,  Christopher Fludger ,  Han Henry Sun ,  Adrien Comeau

发明人： Dave Walker ,  Kim B. Roberts ,  Maurice O'Sullivan ,  Leo Strawczynski ,  James Whiteaway ,  Christopher Fludger ,  Han Henry Sun ,  Adrien Comeau

IPC分类号： H04B10/00

CPC分类号： H04B10/5051 ,  H04B10/25137

摘要： A method of synthesizing a modulated optical signal using a laser cascaded with an amplitude modulator. A phase drive signal VF(t) is derived for driving the laser to generate an optical carrier signal with a desired phase φ(t). An amplitude drive signal VS(t) is then derived for driving the amplitude modulator to impose a desired amplitude S(t) onto the optical carrier signal generated by the laser. The amplitude drive signal VS(t) is compensated for amplitude modulation of the optical carrier signal generated by the laser.

摘要翻译： 使用与幅度调制器级联的激光来合成调制光信号的方法。 导出相位驱动信号VF（t），用于驱动激光器以产生具有期望相位（t）的光载波信号。 然后导出幅度驱动信号VS（t），用于驱动幅度调制器，以将期望的振幅S（t）施加到由激光器产生的光载波信号上。 振幅驱动信号VS（t）被补偿由激光器产生的光载波信号的幅度调制。

公开(公告)号：US07894721B2

公开(公告)日：2011-02-22

申请号：US11533166

申请日：2006-09-19

申请人： Kim B. Roberts ,  Genzao G. Zhang ,  James Harley ,  Feng Shi ,  Leo Strawczynski

发明人： Kim B. Roberts ,  Genzao G. Zhang ,  James Harley ,  Feng Shi ,  Leo Strawczynski

IPC分类号： H04B10/08 ,  H04B17/00

CPC分类号： H04J14/0227 ,  H04B10/0793 ,  H04J14/0201 ,  H04J14/0221 ,  H04J14/0246 ,  H04J14/0279

摘要： An optical network system having a global controller capable of controlling all the elements of the network. The controller receives performance data from each optical network element and calculates a performance value for each channel transmitting through the system. The controller then isolates the channel with the minimum performance value and tests possible changes in network element parameters to find a change which would increase this performance value. Once such a change is found, it is implemented and the system is reoptimized.

摘要翻译： 一种具有能够控制网络的所有元素的全局控制器的光网络系统。 控制器从每个光网络元件接收性能数据，并计算通过系统传输的每个通道的性能值。 然后，控制器将通道与最小性能值隔离，并测试网元参数的可能变化，以找到会增加此性能值的更改。 一旦发现了这样的变化，就会实现这一改变，系统被重新优化。

公开(公告)号：US07756421B2

公开(公告)日：2010-07-13

申请号：US10405236

申请日：2003-04-03

申请人： Kim B. Roberts ,  Leo Strawczynski ,  Maurice S. O'Sullivan

发明人： Kim B. Roberts ,  Leo Strawczynski ,  Maurice S. O'Sullivan

IPC分类号： H04B10/00

CPC分类号： H04B10/2543

摘要： Nonlinearity-induced signal distortions are compensated by processing an input communications signal, in the electrical domain prior to Electrical-to-optical conversion and transmission through an optical link of a communications system. According to the invention, a compensation operator is determined that substantially mitigates the nonlinearity-induced signal distortions imparted to an optical signal traversing the communications system. The input communications signal is then input to the compensation operator to generate a predistorted electrical signal. This predistorted electrical signal is then used to modulate an optical source to generate a corresponding predistorted optical signal for transmission through the optical communications system. With this arrangement, arbitrary nonlinearity-induced signal distortions imparted by the optical link can be compensated in such a manner that a comparatively undistorted optical signal is obtained at the receiving end of the optical link.

摘要翻译： 在通过通信系统的光链路的电 - 光转换和传输之前，通过处理电域中的输入通信信号来补偿非线性引起的信号失真。 根据本发明，确定补偿算子，其基本上减轻施加到穿过通信系统的光信号的非线性引起的信号失真。 然后将输入通信信号输入到补偿操作器以产生预失真的电信号。 然后，该预失真的电信号用于调制光源以产生用于通过光通信系统传输的相应的预失真光信号。 通过这种布置，可以以在光链路的接收端获得相对不失真的光信号的方式来补偿由光链路赋予的任意非线性引起的信号失真。

公开(公告)号：US07457538B2

公开(公告)日：2008-11-25

申请号：US10145035

申请日：2002-05-15

申请人： Leo Strawczynski ,  Kim B. Roberts

发明人： Leo Strawczynski ,  Kim B. Roberts

IPC分类号： H04B10/08

CPC分类号： H04B10/077 ,  H04B10/07955 ,  H04B2210/258

摘要： A digital performance monitoring method and system for an optical communications system utilizes a channel monitor and a digital signal processor (DSP). The channel monitor is designed to monitor a respective channel signal of the optical communications system, and includes: a sample memory adapted to store sample data including a set of sequential N-bit (where N≧1) samples generated by an Analog-to-Digital (A/D) converter at a timing of a predetermined sample clock during a predetermined time interval; and a controller adapted to control storage of the sample data to the sample memory. The digital signal processor (DSP) is designed to calculate at least one performance parameter of the optical communications system based on the sample data.

摘要翻译： 用于光通信系统的数字性能监测方法和系统利用信道监视器和数字信号处理器（DSP）。 信道监视器被设计为监视光通信系统的相应信道信号，并且包括：采样存储器，其适于存储采样数据，该采样数据包括由模数转换器产生的一组顺序N位（其中N> = 1）样本 数字（A / D）转换器在预定时间间隔内在预定采样时钟的定时; 以及控制器，其适于将样本数据的存储控制到所述样本存储器。 数字信号处理器（DSP）被设计为基于样本数据来计算光通信系统的至少一个性能参数。

公开(公告)号：US07522841B2

公开(公告)日：2009-04-21

申请号：US11328199

申请日：2006-01-10

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

发明人： Chandra Bontu ,  Kuang Tsan Wu ,  John McNicol ,  Kim B. 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：US11239929B1

公开(公告)日：2022-02-01

申请号：US17203332

申请日：2021-03-16

申请人： Ramin Babaee ,  Shahab Oveis Gharan ,  Martin Bouchard ,  Kim B. Roberts

发明人： Ramin Babaee ,  Shahab Oveis Gharan ,  Martin Bouchard ,  Kim B. Roberts

IPC分类号： H04B3/46 ,  H04B17/318

摘要： A receiver is configured to detect, at a communication interface, a received signal that suffers from degradations incurred over a communication channel. The receiver applies an adaptive filter to a series of received blocks of a digital representation of the received signal, thereby generating respective filtered blocks, where each received block represents 2N frequency bins, and where N is a positive integer. The receiver calculates coefficients for use by the adaptive filter on a jth received block as a function of (i) error estimates associated with an (j−D−1)th filtered block, where D is a positive integer representing a number of blocks, and where j is a positive integer greater than (D−1); and (ii) an inverse of an approximate covariance matrix associated with the (j−D−1)th received block, where the approximate covariance matrix is a diagonal matrix of size L×L, and where L is a positive integer lower than 2N.