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41. 发明授权

US08315528B2 Zero mean carrier recovery 有权
标题翻译：零平均载波恢复
公开(公告)号：US08315528B2
公开(公告)日：2012-11-20
申请号：US12644409
申请日：2009-12-22
申请人： Kim B. Roberts , Ahmed Awadalla
发明人： Kim B. Roberts , Ahmed Awadalla
IPC分类号： H04B10/06
CPC分类号： H04B10/6164 , H04B10/60 , H04B10/611 , H04B10/6161
摘要： A method of data symbol recovery in a coherent receiver of an optical communications system. Two or more SYNC bursts, having a known symbol sequence and periodicity, are processed to derive an estimate of a frequency offset Δf between a transmit laser and a Local Oscillator (LO) of the receiver. A phase rotation κ(n) is computed based on the estimate of the frequency offset Δf, and applied to a plurality of data symbol estimates to generate corresponding rotated symbol estimates. The rotated symbol estimates are then filtered to generate corresponding decision values of each data symbol.
摘要翻译：一种在光通信系统的相干接收机中进行数据符号恢复的方法。处理具有已知符号序列和周期性的两个或多个SYNC突发，以导出接收机的发射激光器和本地振荡器（LO）之间的频率偏移＆Dgr; f的估计。基于频率偏移＆Dgr; f的估计来计算相位旋转kgr（n），并将其应用于多个数据符号估计以产生相应的旋转符号估计。然后对旋转的符号估计进行滤波以产生每个数据符号的相应决定值。

42. 发明授权

US08249467B2 Self test of a dual polarization transmitter 有权
标题翻译：双极化发射器的自检
公开(公告)号：US08249467B2
公开(公告)日：2012-08-21
申请号：US12721802
申请日：2010-03-11
申请人： Kim B. Roberts , Maurice O'Sullivan , Ian Betty
发明人： Kim B. Roberts , Maurice O'Sullivan , Ian Betty
IPC分类号： H04B10/00 , H04B10/06 , H04J14/06
CPC分类号： H04B10/532 , H04J14/06
摘要： A method of testing a dual-polarization optical transmitter comprising a pair of polarization transmitters for respectively generating first and second polarization signals, and a polarization combiner for generating an optical signal composed of the first and second polarization signals with respective orthogonal polarization vectors. Each of the polarization transmitters is controlled to transmit respective polarization optical signals having predetermined characteristics. An output of the dual-polarization optical transmitter is tapped to obtain a first tap signal representative of the first polarization signal, and a second tap signal representative of the second polarization signal. A relative angle between respective polarization vectors of the tap signals is controlled, and the first and second tap signals combined to generate a combined light. A power level of the combined light is detected, and processed to obtain information about the performance of the dual polarization transmitter.
摘要翻译：一种测试包括分别产生第一和第二偏振信号的一对偏振发射器的双偏振光发射器的方法，以及用于产生由第一和第二极化信号与各个正交偏振矢量组成的光信号的偏振组合器。控制每个偏振发射器以发送具有预定特性的相应偏振光信号。双极化光发射机的输出被抽头以获得表示第一极化信号的第一抽头信号，以及表示第二极化信号的第二抽头信号。控制抽头信号的相应极化矢量之间的相对角度，并且组合第一和第二抽头信号以产生组合的光。检测组合光的功率电平，并进行处理以获得关于双极化发射器的性能的信息。

43. 发明授权

US08230294B2 Low density parity check (LDPC) decoder using broadcast messaging 有权
标题翻译：低密度奇偶校验（LDPC）解码器使用广播消息
公开(公告)号：US08230294B2
公开(公告)日：2012-07-24
申请号：US12182575
申请日：2008-07-30
申请人： Kim B. Roberts , Manoj Verghese , James Harley , David Damian Nicholas Bevan
发明人： Kim B. Roberts , Manoj Verghese , James Harley , David Damian Nicholas Bevan
IPC分类号： G06F11/00
CPC分类号： H03M13/1134 , H03M13/1114 , H04L1/0052 , H04L1/0057
摘要： In a decoder implementing a belief propagation algorithm for iteratively decoding a Low Density Parity Check (LDPC) encoded data block, a method of computing messages to be sent by a first node of the decoder to at least one neighbor node of the decoder. The method comprises: processing messages received by the first node to remove an echo of a previous message sent by the first node to the at least one neighbor node in a previous iteration, to yield corresponding modified messages; computing a message for a current iteration using the modified messages; and broadcasting the computed message for the current iteration to each of the at least one neighbor nodes.
摘要翻译：在实现用于对低密度奇偶校验（LDPC）编码数据块进行迭代解码的置信传播算法的解码器中，一种计算将要由解码器的第一节点发送到解码器的至少一个相邻节点的消息的方法。该方法包括：处理由第一节点接收的消息，以将先前迭代中的第一节点发送的先前消息的回波消除到至少一个相邻节点，以产生相应的修改消息; 使用修改的消息计算当前迭代的消息; 以及将针对当前迭代的所计算的消息广播到所述至少一个相邻节点中的每一个。

44. 发明授权

US07930435B2 Hub and spoke compression 有权
标题翻译：轮毂和轮辐压缩
公开(公告)号：US07930435B2
公开(公告)日：2011-04-19
申请号：US12114059
申请日：2008-05-02
申请人： Kim B. Roberts
发明人： Kim B. Roberts
IPC分类号： G06F15/16
CPC分类号： H03M7/30 , H03M7/3084 , H03M7/40 , H03M7/4006 , H04L69/04
摘要： A method of compressing data traffic for transmission through a network, the method comprises computing, for each one of a plurality of contexts of data traffic within the network, a respective optimal dictionary for encoding data traffic; For each block of data to be transmitted through the network: identifying a block context of the block of data; and encoding the block of data using the respective dictionary computed for the context corresponding to the identified block context.
摘要翻译：一种压缩数据流量以便通过网络进行传输的方法，所述方法包括针对网络内的数据业务的多个上下文中的每一个计算用于对数据业务进行编码的相应最佳字典; 对于要通过网络传输的每个数据块：识别数据块的块上下文; 以及使用针对与所识别的块上下文相对应的上下文计算的相应字典对数据块进行编码。

45. 发明授权

US07894721B2 Control of parameters in a global optical controller 有权
标题翻译：控制全局光控制器中的参数
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。

46. 发明授权

US07756421B2 Electrical domain compensation of non-linear effects in an optical communications system 有权
标题翻译：光通信系统中非线性效应的电域补偿
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。

47. 发明授权

US07599400B2 Methods and systems for reducing waiting-time jitter 失效
标题翻译：减少等待时间抖动的方法和系统
公开(公告)号：US07599400B2
公开(公告)日：2009-10-06
申请号：US11218430
申请日：2005-09-06
申请人： Kim B. Roberts , Chandra Bontu , James Harley
发明人： Kim B. 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指示异步数据信号和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。

48. 发明授权

US07382984B2 Electrical domain compensation of optical dispersion in an optical communications system 有权
标题翻译：光通信系统中光散射的电域补偿
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。

49. 发明授权

US07305183B2 Measurement of polarization dependent loss in an optical transmission system 有权
标题翻译：光传输系统中偏振相关损耗的测量
公开(公告)号：US07305183B2
公开(公告)日：2007-12-04
申请号：US09975985
申请日：2001-10-15
申请人： Kim B. Roberts , Giuseppe G. Bordogna , Riyaz R. Jamal , Douglas D. McGhan , Maurice S. O'Sullivan
发明人： Kim B. Roberts , Giuseppe G. Bordogna , Riyaz R. Jamal , Douglas D. McGhan , Maurice S. O'Sullivan
IPC分类号： H04B10/08 , H04B17/00 , H04B10/00 , H04J14/06
CPC分类号： H04B10/2572
摘要： A method and system enables measurement of polarization dependent loss (PDL) in an optical communications system including a plurality of cascaded optical components. An optical signal having a predetermined initial polarization state is launched into the optical communications system. A polarization state of the signal is detected at a selected detection point downstream of the launch point. The PDE is evaluated using the predetermined initial polarization state and the detected polarization state.
摘要翻译：一种方法和系统能够测量包括多个级联光学部件的光通信系统中的偏振相关损耗（PDL）。具有预定初始极化状态的光信号被发射到光通信系统中。在发射点下游的选择的检测点处检测信号的偏振状态。使用预定的初始极化状态和检测到的偏振状态来评估PDE。

50. 发明授权

US07197031B2 Cross-connection of high bandwidth signal traffic across independent parallel shelves 有权
标题翻译：在独立的并行架上交叉连接高带宽信号流量
公开(公告)号：US07197031B2
公开(公告)日：2007-03-27
申请号：US09992410
申请日：2001-11-26
申请人： Malcolm Betts , Kim B. Roberts , Ronald J. Gagnon
发明人： Malcolm Betts , Kim B. Roberts , Ronald J. Gagnon
IPC分类号： H04Q11/00
CPC分类号： H04Q11/0478 , H04J3/0623 , H04J3/1611 , H04J2203/0003 , H04J2203/0014 , Y10S370/907
摘要： A serial data stream is mapped through a cross-connect via two or more parallel independent shelves. The serial data stream is split into at least two sub-streams. If the lead frame of a sub-stream contains a concatenation indicator, it is replaced by a valid payload pointer, and a spilt indicator is inserted into the frame. Each of the sub-streams is then mapped through the cross-connect via a respective parallel independent shelf. Finally, the sub-streams are recombined to form an output serial data stream equivalent to the original serial data stream. If the lead frame of a sub-stream contains a split indicator, a concatenation indicator is inserted into the corresponding frame of the output serial data stream to restore the concatenation of the original serial data stream. Otherwise, a payload pointer within the lead frame is replaced by a valid payload pointer in the corresponding frame of the output data stream.
摘要翻译：串行数据流通过两个或更多个并行独立的架子通过交叉连接进行映射。串行数据流被分成至少两个子流。如果子流的引导帧包含级联指示符，则将其替换为有效的有效载荷指针，并将溢出的指示符插入到该帧中。然后通过交叉连接经由相应的并行独立搁架映射每个子流。最后，子流被重组以形成等同于原始串行数据流的输出串行数据流。如果子流的引导帧包含分离指示符，则将串联指示符插入到输出串行数据流的相应帧中，以恢复原始串行数据流的级联。否则，引导帧内的有效载荷指针将被输出数据流的相应帧中的有效载荷指针所取代。

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