公开(公告)号：US08433205B2

公开(公告)日：2013-04-30

申请号：US13086020

申请日：2011-04-13

申请人： Toshiaki Koike-Akino ,  Philip V. Orlik ,  Kieran Parsons

发明人： Toshiaki Koike-Akino ,  Philip V. Orlik ,  Kieran Parsons

IPC分类号： H04B10/04 ,  H04B10/08 ,  H04B10/00 ,  H04B10/12 ,  H04J14/00

CPC分类号： H04J14/06 ,  H04B10/5055 ,  H04B10/532 ,  H04J14/02

摘要： A method reduces time-varying polarization crosstalk due to XPolM by transmitting multi-dimensional orthogonal constellations. Three variants of crosstalk-free constellations are provided: Grassmann constellations, unitary constellations, and rotation codes. The method uses the Grassmann constellations and the unitary constellations to deal with fiber nonlinearity by applying as a polarization-time coding. The rotation codes exploit a fiber channel characteristic to improve performance and to reduce computational complexity. The underlying orthogonality behind those constellations enables the receiver to decode it as if there is no polarization crosstalk. Moreover, the required computational complexity at the receiver is significantly reduced because neither crosstalk cancellers nor channel estimators are needed.

摘要翻译： 一种方法通过传输多维正交星座来减少XPolM引起的时变极化串扰。 提供了无串扰星座的三种变体：Grassmann星座，酉星座和旋转码。 该方法使用Grassmann星座和单一星座通过应用极化时间编码来处理光纤非线性。 旋转码利用光纤通道特性来提高性能并降低计算复杂度。 这些星座背后的基础正交性使得接收机能够将其解码为好像没有偏振串扰。 此外，接收机所需的计算复杂度显着降低，因为不需要串扰消除器和信道估计器。

公开(公告)号：US20120263454A1

公开(公告)日：2012-10-18

申请号：US13086020

申请日：2011-04-13

申请人： Toshiaki Koike-Akino ,  Philip V. Orlik ,  Kieran Parsons

发明人： Toshiaki Koike-Akino ,  Philip V. Orlik ,  Kieran Parsons

IPC分类号： H04B10/00 ,  H04B10/12 ,  H04B10/08 ,  H04J14/02

CPC分类号： H04J14/06 ,  H04B10/5055 ,  H04B10/532 ,  H04J14/02

摘要： A method reduces time-varying polarization crosstalk due to XPolM by transmitting multi-dimensional orthogonal constellations. Three variants of crosstalk-free constellations are provided: Grassmann constellations, unitary constellations, and rotation codes. The method uses the Grassmann constellations and the unitary constellations to deal with fiber nonlinearity by applying as a polarization-time coding. The rotation codes exploit a fiber channel characteristic to improve performance and to reduce computational complexity. The underlying orthogonality behind those constellations enables the receiver to decode it as if there is no polarization crosstalk. Moreover, the required computational complexity at the receiver is significantly reduced because neither crosstalk cancellers nor channel estimators are needed.

摘要翻译： 一种方法通过传输多维正交星座来减少XPolM引起的时变极化串扰。 提供了无串扰星座的三种变体：Grassmann星座，酉星座和旋转码。 该方法使用Grassmann星座和单一星座通过应用极化时间编码来处理光纤非线性。 旋转码利用光纤通道特性来提高性能并降低计算复杂度。 这些星座背后的基础正交性使得接收机能够将其解码为好像没有偏振串扰。 此外，接收机所需的计算复杂度显着降低，因为不需要串扰消除器和信道估计器。

公开(公告)号：US20130170842A1

公开(公告)日：2013-07-04

申请号：US13343133

申请日：2012-01-04

申请人： Toshiaki Koike-Akino ,  Chunjie Duan ,  Kieran Parsons ,  Keisuke Kojima

发明人： Toshiaki Koike-Akino ,  Chunjie Duan ,  Kieran Parsons ,  Keisuke Kojima

IPC分类号： H04B10/06

CPC分类号： H04L25/03184 ,  H04L25/03171 ,  H04L25/03286

摘要： A method equalizes and decodes a received signal including a sequence of symbols. Subsequences of the signal are selected, wherein the subsequences are overlapping and time shifted. For each subsequence, statistics of the channel corresponding to a pattern in the subsequence are selected, wherein the statistics include high-order statistics. A transmitted signal corresponding to the received signal is then estimated based on the statistics.

摘要翻译： 一种方法对包括符号序列的接收信号进行均衡和解码。 选择信号的子序列，其中子序列重叠并且时移。 对于每个子序列，选择与子序列中的模式对应的信道的统计，其中统计信息包括高阶统计。 然后，基于统计量来估计与接收信号对应的发送信号。

公开(公告)号：US08472809B2

公开(公告)日：2013-06-25

申请号：US13085715

申请日：2011-04-13

申请人： Toshiaki Koike-Akino ,  Cheng Liu ,  Kieran Parsons

发明人： Toshiaki Koike-Akino ,  Cheng Liu ,  Kieran Parsons

IPC分类号： H04B10/00

CPC分类号： H04L25/03292 ,  H04B10/6162 ,  H04B10/6163 ,  H04L25/024

摘要： For coherent fiber optic communications, the nonlinear XPolM impairment is the most important issue to realize over-100 Gbps high-speed transmissions. A method provides a way to cancel time-varying XPolM crosstalk by introducing multi-stage adaptive mechanism. In the method, a low-complexity adaptive filtering based on recursive least-squares (RLS) first tracks the time-varying crosstalk along with the per-survivor trellis-state decoding. The estimated channel and the decoded data are then used to calculate the empirical covariance, which is in turn exploited to obtain more accurate channel estimates by means of optimal-weighted least-squares. This is performed with a low-complexity processing over frequency domain with fast Fourier transform. The performance is significantly improved with turbo principle decoding, more specifically, iterative decoding and iterative estimation over a block.

摘要翻译： 对于相干光纤通信，非线性XPolM损伤是实现超过100 Gbps高速传输的最重要问题。 一种方法提供了一种通过引入多级自适应机制来消除时变XPolM串扰的方法。 在该方法中，基于递归最小二乘法（RLS）的低复杂度自适应滤波首先跟踪随时间变化的串扰以及每个幸存者网格状态解码。 然后将估计的信道和解码的数据用于计算经验协方差，其经过利用最佳加权最小二乘法获得更准确的信道估计。 这是通过具有快速傅立叶变换的频域上的低复杂度处理来执行的。 通过turbo原理解码，更具体地说，在块上迭代解码和迭代估计，性能得到显着提高。

公开(公告)号：US20120263464A1

公开(公告)日：2012-10-18

申请号：US13085715

申请日：2011-04-13

申请人： Toshiaki Koike-Akino ,  Cheng Liu ,  Kieran Parsons

发明人： Toshiaki Koike-Akino ,  Cheng Liu ,  Kieran Parsons

IPC分类号： H04B10/06 ,  H04J14/06

CPC分类号： H04L25/03292 ,  H04B10/6162 ,  H04B10/6163 ,  H04L25/024

摘要： For coherent fiber optic communications, the nonlinear XPolM impairment is the most important issue to realize over-100 Gbps high-speed transmissions. A method provides a way to cancel time-varying XPolM crosstalk by introducing multi-stage adaptive mechanism. In the method, a low-complexity adaptive filtering based on recursive least-squares (RLS) first tracks the time-varying crosstalk along with the per-survivor trellis-state decoding. The estimated channel and the decoded data are then used to calculate the empirical covariance, which is in turn exploited to obtain more accurate channel estimates by means of optimal-weighted least-squares. This is performed with a low-complexity processing over frequency domain with fast Fourier transform. The performance is significantly improved with turbo principle decoding, more specifically, iterative decoding and iterative estimation over a block.

摘要翻译： 对于相干光纤通信，非线性XPolM损伤是实现超过100 Gbps高速传输的最重要问题。 一种方法提供了一种通过引入多级自适应机制来消除时变XPolM串扰的方法。 在该方法中，基于递归最小二乘法（RLS）的低复杂度自适应滤波首先跟踪随时间变化的串扰以及每个幸存者网格状态解码。 然后将估计的信道和解码的数据用于计算经验协方差，其经过利用最佳加权最小二乘法获得更准确的信道估计。 这是通过具有快速傅立叶变换的频域上的低复杂度处理来执行的。 通过turbo原理解码，更具体地说，在块上迭代解码和迭代估计，性能得到显着提高。

公开(公告)号：US08498544B2

公开(公告)日：2013-07-30

申请号：US13024769

申请日：2011-02-10

申请人： Chunjie Duan ,  Kieran Parsons ,  Philip V. Orlik

发明人： Chunjie Duan ,  Kieran Parsons ,  Philip V. Orlik

IPC分类号： H04B10/00

CPC分类号： G06F7/5057 ,  G06F7/5443 ,  H03M13/1111 ,  H03M13/658 ,  H04B10/6165 ,  H04L9/3218 ,  H04L2209/46 ,  H04L2209/50

摘要： A method and an optical receiver compensates for an error in a phase of an optical signal in a receiver. The signal includes blocks of symbols in a sequence. Each block is decoded based on a partially phase compensated symbols, and an average phase error for the block is estimated. Forward phase compensation and backward phase compensation is performed on the block based on the average phase error, and the decoding, estimating, performing is iterated until a termination condition is satisfied to produce a phase compensated block.

摘要翻译： 一种方法和光学接收机补偿接收机中光信号的相位中的误差。 信号包括序列中的符号块。 基于部分相位补偿的符号对每个块进行解码，并且估计块的平均相位误差。 基于平均相位误差对块进行正向相位补偿和反相补偿，迭代解码，估计执行直到满足终止条件以产生相位补偿块。

公开(公告)号：US20110129234A1

公开(公告)日：2011-06-02

申请号：US13024769

申请日：2011-02-10

申请人： Chunjie Duan ,  Kieran Parsons ,  Philip V. Orlik

发明人： Chunjie Duan ,  Kieran Parsons ,  Philip V. Orlik

IPC分类号： H04B10/06

CPC分类号： G06F7/5057 ,  G06F7/5443 ,  H03M13/1111 ,  H03M13/658 ,  H04B10/6165 ,  H04L9/3218 ,  H04L2209/46 ,  H04L2209/50

摘要： A method and an optical receiver compensates for an error in a phase of an optical signal in a receiver. The signal includes blocks of symbols in a sequence. Each block is decoded based on a partially phase compensated symbols, and an average phase error for the block is estimated. Forward phase compensation and backward phase compensation is performed on the block based on the average phase error, and the decoding, estimating, performing is iterated until a termination condition is satisfied to produce a phase compensated block.

摘要翻译： 一种方法和光学接收机补偿接收机中光信号的相位中的误差。 信号包括序列中的符号块。 基于部分相位补偿的符号对每个块进行解码，并且估计块的平均相位误差。 基于平均相位误差对块进行正向相位补偿和反相补偿，迭代解码，估计执行直到满足终止条件以产生相位补偿块。

公开(公告)号：US08245116B2

公开(公告)日：2012-08-14

申请号：US13007435

申请日：2011-01-14

申请人： Philip Orlik ,  Raymond Yim ,  Kieran Parsons ,  Vahid Tarokh ,  Jinyun Zhang

发明人： Philip Orlik ,  Raymond Yim ,  Kieran Parsons ,  Vahid Tarokh ,  Jinyun Zhang

IPC分类号： H03M13/00

CPC分类号： H03M13/136 ,  H03M13/3905 ,  H03M13/45 ,  H03M13/458 ,  H04L1/0054

摘要： Soft decision decoding of a codeword of a Reed-Muller (RM) code by selecting an optimal decomposition variable i using a likelihood calculation. A code RM(r, m) is expressed as {(u, uv)|uεRM(r, m−1) and vεRM(r−1, m−1)}, where uv denotes a component-wise multiplication of u and v, and (u, uv)=(r1, r2). A receive codeword is separated into r1=u and r2=uv based on the optimal decomposition variable, and r2 is decoded according to the optimal decomposition variable, using a RM(r−1, m−1) decoder to obtain a decoded v and a first set of decoded bits. The decoded v is combined with r1 using (r1+r2v)/2, and (r1+r2v)/2 is decoded using a RM(r, m−1) decoder to obtain a decoded u and a second set of decoded bits.

摘要翻译： 通过使用似然率计算选择最优分解变量i，对Reed-Muller（RM）码的码字进行软判决解码。 代码RM（r，m）表示为{（u，uv）| u＆egr; RM（r，m-1）和v＆egr; RM（r-1，m-1）}，其中uv表示分量 u和v的乘法，（u，uv）=（r1，r2）。 基于最优分解变量将接收码字分为r1 = u和r2 = uv，并使用RM（r-1，m-1）解码器根据最优分解变量对r2进行解码，以获得解码的v和 第一组解码位。 使用（r1 + r2v）/ 2将解码的v与r1组合，并且使用RM（r，m-1）解码器对（r1 + r2v）/ 2进行解码，以获得解码的u和第二组解码比特。

公开(公告)号：US20120170934A1

公开(公告)日：2012-07-05

申请号：US12984977

申请日：2011-01-05

申请人： Raymond Yim ,  Kieran Parsons

发明人： Raymond Yim ,  Kieran Parsons

IPC分类号： H04J14/00

CPC分类号： H04L49/357 ,  H04J14/0206 ,  H04J14/0254 ,  H04J14/0267 ,  H04J14/0268 ,  H04J14/0284 ,  H04J2203/0058 ,  Y02D30/20

摘要： An optical network includes multiple source, cross connect, and destination nodes. A traffic demand matrix is constructed for each possible pair of combinations of the source nodes and the destination nodes. A first energy reduction metric is determined for creating the bypass between the source node and any XC node based on the traffic demand matrix, and a second energy reduction metric is determined for creating the bypass between any XC node and the destination node using the traffic demand matrix. Then, a bypass that terminates at one of the XC nodes that has a largest energy reduction metric is created.

摘要翻译： 光网络包括多个源，交叉连接和目的节点。 为源节点和目的节点的每个可能的组合组合构建业务需求矩阵。 确定用于基于业务需求矩阵在源节点和任何XC节点之间创建旁路的第一能量减少度量，并且确定用于使用业务需求在任何XC节点和目的地节点之间创建旁路的第二能量减少度量 矩阵。 然后，创建一个在具有最大能量减少度量的XC节点之一终止的旁路。

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。