公开(公告)号：US08719656B2

公开(公告)日：2014-05-06

申请号：US13441808

申请日：2012-04-06

申请人： Murat Arabaci ,  Lei Xu ,  Ting Wang ,  Ivan B. Djordjevic

发明人： Murat Arabaci ,  Lei Xu ,  Ting Wang ,  Ivan B. Djordjevic

IPC分类号： H03M13/00 ,  H04L1/18

CPC分类号： H04L1/0058 ,  H03M13/1171 ,  H03M13/255 ,  H04B10/5055 ,  H04L1/0047 ,  H04L27/2096

摘要： Systems and methods are disclosed for communicating signals, by receiving a K-symbol-long input block from a 2m-ary source channel; encoding the input block into a 2m-ary non-binary low-density parity-check (LDPC) codeword of length N; and mapping each 2m-ary symbol to a point in a signal constellation comprised of 2m points, wherein a non-binary LDPC code is used as the component code for forward error correction in a coded modulation scheme capable of achieving optical fiber communication at rates beyond 100 Gb/s.

摘要翻译： 公开了通过从2m源信道接收K符号长输入块来传送信号的系统和方法; 将输入块编码为长度为N的2m元非二进制低密度奇偶校验（LDPC）码字; 并将每个2m元符号映射到由2m点组成的信号星座中的一个点，其中使用非二进制LDPC码作为能够以超出速率实现光纤通信的编码调制方案中的前向纠错的分量码 100 Gb / s。

公开(公告)号：US08503879B2

公开(公告)日：2013-08-06

申请号：US12911491

申请日：2010-10-25

申请人： Lei Xu ,  Yueping Zhang ,  Atul Singh ,  Guofei Jiang ,  Ting Wang

发明人： Lei Xu ,  Yueping Zhang ,  Atul Singh ,  Guofei Jiang ,  Ting Wang

IPC分类号： H04J14/00

CPC分类号： H04Q11/0005 ,  H04Q2011/0016 ,  H04Q2011/0035 ,  H04Q2011/0052

摘要： In one aspect, a system includes one or more electrical switches to transfer data in a data network; one or more optical switching groups coupled to each electrical switch, each switching group having one or more server racks, each server rack coupled to a top of rack (TOR) switch and an optical transceiver coupled to the TOR switch; and an optical switching unit (OSU) coupled to the one or more optical switching groups.

摘要翻译： 在一个方面，系统包括一个或多个用于在数据网络中传送数据的电气开关; 每个交换组具有一个或多个服务器机架，每个服务器机架耦合到机架顶部（TOR）开关和连接到TOR开关的光收发器;一个或多个光学开关组， 以及耦合到所述一个或多个光交换组的光交换单元（OSU）。

公开(公告)号：US20120263466A1

公开(公告)日：2012-10-18

申请号：US13441814

申请日：2012-04-06

申请人： Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

发明人： Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

IPC分类号： H04J14/06 ,  H04B10/12 ,  H04B10/04

CPC分类号： H04B10/2581 ,  H04L27/2096

摘要： Systems and methods are disclosed with a spatial-domain-based multi-dimensional coded-modulation scheme that improves dramatically OSNR sensitivity and tolerance to fiber nonlinearities by using D-dimensional signal constellations, where D=2(2+M)N. The factor 2 originates from two polarizations, 2+M electrical basis functions are selected (2 in-phase/quadrature channels and M pulse-position like basis functions), and N represents the number of orbital angular momentum (OAM) states used in FMFs/MMFs. For single mode fiber applications N is 1.

摘要翻译： 公开了具有基于空间域的多维编码调制方案的系统和方法，通过使用D维2信号星座（D = 2（2 + M）N），可以显着提高OSNR灵敏度和对光纤非线性的容限。 因子2源于两个极化，选择2 + M电基函数（2个同相/正交通道和M个脉冲位置，如基函数），N表示FMF中使用的轨道角动量（OAM）状态的数量 / MMFs。 对于单模光纤应用，N为1。

公开(公告)号：US20120257895A1

公开(公告)日：2012-10-11

申请号：US13251214

申请日：2011-10-01

申请人： Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

发明人： Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

IPC分类号： H04J14/06 ,  H04J14/00

CPC分类号： H04B10/548 ,  H04J14/06 ,  H04L27/2628 ,  H04L27/265 ,  H04L27/2697

摘要： Systems and methods are disclosed to perform four-dimensional optical multiband OFDM communication by organizing an N-dimensional (ND) signal constellation points as a signal matrix; performing 2D-inverse FFT and 2D-FFT to perform modulation and demodulation, respectively; and applying both orthogonal polarizations in the OFDM communication to deal with chromatic dispersion, PMD and PDL effects, and multidimensional signal constellation to improve optical signal-to-noise ratio (OSNR) sensitivity.

摘要翻译： 公开了通过组织N维（ND）信号星座点作为信号矩阵来执行四维光多频带OFDM通信的系统和方法; 分别执行2D反FFT和2D-FFT以进行调制和解调; 并且在OFDM通信中应用正交偏振以处理色散，PMD和PDL效应以及多维信号星座以提高光信噪比（OSNR）灵敏度。

公开(公告)号：US08218977B2

公开(公告)日：2012-07-10

申请号：US12731869

申请日：2010-03-25

申请人： Philip Nan Ji ,  Lei Xu ,  Ting Wang ,  Shuji Murakami ,  Tsutomu Tajima ,  Yutaka Yano

发明人： Philip Nan Ji ,  Lei Xu ,  Ting Wang ,  Shuji Murakami ,  Tsutomu Tajima ,  Yutaka Yano

IPC分类号： H04B10/06

CPC分类号： H04B10/677

摘要： An optical device includes an interferometer for a received optical differential phase shift keying DPSK signal, and an equalizer integrated with the interferometer in a manner for reducing from optical filtering effects an interference by signal bits of the DPSK signal with signal bits of a contiguous DPSK signal. The interferometer is a Michelson delay interferometer type, but can also be a Mach-Zehnder delay interferometer type on fiber, waveguide or other optical structure. The equalizer is a Fabry-Perot type equalizer, but can be a ring resonator type or a fiber based equalizer.

摘要翻译： 光学装置包括用于接收的光学差分相移键控DPSK信号的干涉仪，以及与干涉仪集成的均衡器，以减少光学滤波的方式，利用DPSK信号的信号位与相邻DPSK信号的信号位的干扰 。 干涉仪是迈克尔逊延迟干涉仪型号，但也可以是光纤，波导或其他光学结构上的马赫 - 曾德延迟干涉仪。 均衡器是法布里 - 珀罗型均衡器，但可以是环形谐振器型或基于光纤的均衡器。

公开(公告)号：US08185796B2

公开(公告)日：2012-05-22

申请号：US12392335

申请日：2009-02-25

申请人： Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

发明人： Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

IPC分类号： G06F11/00

CPC分类号： H03M13/1117 ,  H03M13/2957 ,  H03M13/6331 ,  H04L1/005 ,  H04L1/0057 ,  H04L1/0071 ,  H04L5/0008 ,  H04L25/03171 ,  H04L25/03203 ,  H04L25/067 ,  H04L27/223 ,  H04L27/2649 ,  H04L2025/03363 ,  H04L2025/03414 ,  H04L2025/03611

摘要： A receiver and method are provided for mitigation of finer non-linearities in multilevel coded-modulation schemes. The receiver includes a multilevel Bahl-Cocke-Jelinek-Raviv (BCJR) equalizer configured to receive channel samples of an input signal, partially mitigate fiber non-linearities, and provide symbol reliabilities. The receiver further includes a bit probabilities module coupled to the BCJR equalizer configured to calculate soft bit reliabilities from the symbol reliabilities. The receiver also includes one or more low-density parity-check (LDPC) decoders coupled to the bit probabilities module and the BCJR equalizer, configured to receive the soft bit reliabilities and output code words. The one or more LDPC decoders iteratively provide extrinsic soft information feedback to the BCJR equalizer to compensate for the fiber non-linearities.

摘要翻译： 提供了一种用于缓解多电平编码调制方案中更精细的非线性的接收机和方法。 接收机包括一个多层次Bahl-Cocke-Jelinek-Raviv（BCJR）均衡器，被配置为接收输入信号的信道样本，部分地减轻光纤非线性并提供符号可靠性。 接收机还包括耦合到BCJR均衡器的位概率模块，其被配置为从符号可靠性计算软比特可靠性。 接收机还包括耦合到比特概率模块和BCJR均衡器的一个或多个低密度奇偶校验（LDPC）解码器，被配置为接收软比特可靠性和输出码字。 一个或多个LDPC解码器向BCJR均衡器迭代地提供外部软信息反馈以补偿光纤非线性。

公开(公告)号：US08184993B2

公开(公告)日：2012-05-22

申请号：US12392317

申请日：2009-02-25

申请人： Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

发明人： Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

IPC分类号： H04B10/00

CPC分类号： H04L27/2647 ,  H03M13/1102 ,  H03M13/2957 ,  H03M13/31 ,  H03M13/6561 ,  H04B10/2572 ,  H04B10/548 ,  H04L1/005 ,  H04L1/0057 ,  H04L1/0066

摘要： A receiver and method are provided. The receiver includes a detector configured to receive polarization multiplexed coded orthogonal frequency division multiplexing input sequences and generate estimates of unknown transmitted symbols in the input sequences for x- and y-polarization channels with respect to laser phase noise and PMD. A demapper coupled to the detector is configured to partially cancel polarization mode dispersion (PMD) in the input sequences by computing symbol probabilities for the estimates with respect to the laser phase noise, and averaging the symbol probabilities with respect to the laser phase noise. One or more low-density parity-check (LDPC) decoders coupled to the demapper are configured to receive bit probabilities derived from the averaged symbol probabilities and output code words based at least on the bit probabilities. The one or more LDPC decoders iteratively provide extrinsic soft information feedback to the demapper to compensate for the PMD.

摘要翻译： 提供接收机和方法。 接收机包括检测器，其被配置为接收偏振复用的编码的正交频分复用输入序列，并且针对相对于激光相位噪声和PMD的x和y偏振通道的输入序列生成未知发射符号的估计。 耦合到检测器的去映射器被配置为通过计算关于激光相位噪声的估计的符号概率，并相对于激光相位噪声来平均符号概率来部分地消除输入序列中的偏振模色散（PMD）。 耦合到解映射器的一个或多个低密度奇偶校验（LDPC）解码器被配置为从至少基于位概率接收从平均符号概率导出的比特概率和输出码字。 一个或多个LDPC解码器向解映射器反复地提供外在的软信息反馈以补偿PMD。

公开(公告)号：US08184973B2

公开(公告)日：2012-05-22

申请号：US12371233

申请日：2009-02-13

申请人： Dayou Qian ,  Lei Xu ,  Junqiang Hu ,  Ting Wang

发明人： Dayou Qian ,  Lei Xu ,  Junqiang Hu ,  Ting Wang

IPC分类号： H04J14/06 ,  H04B10/158

CPC分类号： H04J14/06 ,  H04B10/61 ,  H04B10/676

摘要： There is provided a method for detecting optical signals comprising employing a photo diode to both directly detect a received optical signal and convert it into an electrical signal for recovery of data bit stream information in the received optical signal, the received optical signal being derived from a separation of two polarization multiplexed optical signals that were combined before being received.

摘要翻译： 提供了一种用于检测光信号的方法，包括采用光电二极管直接检测接收到的光信号并将其转换成用于恢复所接收的光信号中的数据位流信息的电信号，所接收的光信号从 在接收之前组合的两个偏振复用光信号的分离。

公开(公告)号：US20100215371A1

公开(公告)日：2010-08-26

申请号：US12392317

申请日：2009-02-25

申请人： Ivan B. Djordevia ,  Lei Xu ,  Ting Wang

发明人： Ivan B. Djordevia ,  Lei Xu ,  Ting Wang

IPC分类号： H04J14/02

CPC分类号： H04L27/2647 ,  H03M13/1102 ,  H03M13/2957 ,  H03M13/31 ,  H03M13/6561 ,  H04B10/2572 ,  H04B10/548 ,  H04L1/005 ,  H04L1/0057 ,  H04L1/0066

摘要： A receiver and method are provided. The receiver includes a detector configured to receive polarization multiplexed coded orthogonal frequency division multiplexing input sequences and generate estimates of unknown transmitted symbols in the input sequences for x- and y-polarization channels with respect to laser phase noise and PMD. A demapper coupled to the detector is configured to partially cancel polarization mode dispersion (PMD) in the input sequences by computing symbol probabilities for the estimates with respect to the laser phase noise, and averaging the symbol probabilities with respect to the laser phase noise. One or more low-density parity-check (LDPC) decoders coupled to the demapper are configured to receive bit probabilities derived from the averaged symbol probabilities and output code words based at least on the bit probabilities. The one or more LDPC decoders iteratively provide extrinsic soft information feedback to the demapper to compensate for the PMD.

摘要翻译： 提供接收机和方法。 接收机包括检测器，其被配置为接收偏振复用的编码的正交频分复用输入序列，并且针对相对于激光相位噪声和PMD的x和y偏振通道的输入序列生成未知发射符号的估计。 耦合到检测器的去映射器被配置为通过计算关于激光相位噪声的估计的符号概率，并相对于激光相位噪声来平均符号概率来部分地消除输入序列中的偏振模色散（PMD）。 耦合到解映射器的一个或多个低密度奇偶校验（LDPC）解码器被配置为从至少基于位概率接收从平均符号概率导出的比特概率和输出码字。 一个或多个LDPC解码器向解映射器反复地提供外在的软信息反馈以补偿PMD。

公开(公告)号：US20090202243A1

公开(公告)日：2009-08-13

申请号：US12371233

申请日：2009-02-13

申请人： Dayou Qian ,  Lei Xu ,  Junqiang Hu ,  Ting Wang

发明人： Dayou Qian ,  Lei Xu ,  Junqiang Hu ,  Ting Wang

IPC分类号： H04J14/06

CPC分类号： H04J14/06 ,  H04B10/61 ,  H04B10/676

摘要： There is provided a method for detecting optical signals comprising employing a photo diode to both directly detect a received optical signal and convert it into an electrical signal for recovery of data bit stream information in the received optical signal, the received optical signal being derived from a separation of two polarization multiplexed optical signals that were combined before being received.

摘要翻译： 提供了一种用于检测光信号的方法，包括采用光电二极管直接检测接收到的光信号并将其转换成用于恢复所接收的光信号中的数据位流信息的电信号，所接收的光信号从 在接收之前组合的两个偏振复用光信号的分离。