公开(公告)号：US20100211849A1

公开(公告)日：2010-08-19

申请号：US12535423

申请日：2009-08-04

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

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

IPC分类号： H03M13/00 ,  G06F11/10 ,  G06F11/08

CPC分类号： H03M13/255 ,  H03M13/116 ,  H03M13/2703 ,  H03M13/6325 ,  H04L1/005 ,  H04L1/0057

摘要： Arbitrarily high data transmission rates may be achieved by the use of N-dimensional, LDPC-coded modulation. N orthonormal basis functions are employed using coherent reception, resulting in a proportional increase in transmission rate with only a modest increase in bit-error ratio.

摘要翻译： 可以通过使用N维，LDPC编码的调制来实现任意高的数据传输速率。 使用相干接收使用N个正交基函数，导致传输速率的比例增加，而误码率仅有适度的增加。

公开(公告)号：US20090282314A1

公开(公告)日：2009-11-12

申请号：US12392374

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： H03M13/29 ,  G06F11/10

CPC分类号： H04L1/0066 ,  H03M13/296 ,  H04L1/005

摘要： A transmitter, a receiver, and corresponding methods are provided. The transmitter includes encoders configured to encode source bit streams from L information sources into bytes of codewords. Each encoder includes different (n, k) multidimensional turbo-product codes of code rate R=k/n, where k is a number of information bytes, and n is code word length. The encoders operate in at least two phases. A first phase involves operating ky column-encoders in parallel on kx bytes per column to generate the code words for a current dimension. A second phase involves operating nx row-encoders in parallel on ky memory locations per rows to generate the code words for the current dimension. The first and second phases are repeated for remaining layers of the current dimension and layers of other dimensions.

摘要翻译： 提供发射机，接收机和相应的方法。 发射机包括被配置为将来自L个信息源的源比特流编码成码字的字节的编码器。 每个编码器包括码率R = k / n的不同（n，k）多维turbo乘积码，其中k是信息字节数，n是码字长度。 编码器至少运行两个阶段。 第一阶段涉及每列以kx字节并行运行ky列编码器，以生成当前维度的代码字。 第二阶段涉及在每行每个ky个存储单元上并行运行nx行编码器，以生成当前维度的代码字。 对于当前尺寸和其他尺寸的层的剩余层重复第一和第二阶段。

公开(公告)号：US08761608B2

公开(公告)日：2014-06-24

申请号：US13251218

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： H04B10/524

CPC分类号： H04L27/2634 ,  H04B10/548 ,  H04B10/611 ,  H04B10/612 ,  H04B10/614 ,  H04L25/4902 ,  H04L27/2697

摘要： Systems and methods are disclosed to provide optical communication by using subcarriers as individual bases functions, obtaining signal constellation points of an N-dimensional pulse amplitude modulation (ND-PAM) constellation diagram as an N-dimensional Cartesian product of a one-dimensional PAM; and transmitting the N-dimensional signal constellation point over all N orthogonal subcarriers serving as individual bases functions.

摘要翻译： 公开了通过使用子载波作为单个基础功能来提供光通信的系统和方法，获得作为一维PAM的N维笛卡尔乘积的N维脉冲幅度调制（ND-PAM）星座图的信号星座点; 并且在用作各个基本功能的所有N个正交子载波上发送N维信号星座点。

公开(公告)号：US08743984B2

公开(公告)日：2014-06-03

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： H04L5/12

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：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：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：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：US08588623B2

公开(公告)日：2013-11-19

申请号：US12860659

申请日：2010-08-20

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

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

IPC分类号： H04B10/06

CPC分类号： H04L25/03171 ,  H04B10/532 ,  H04B10/6971 ,  H04J14/002 ,  H04J14/06 ,  H04L1/005 ,  H04L1/0057 ,  H04L1/0071 ,  H04L27/3405

摘要： Systems and methods for optical communication that use a transmitter/receiver. The systems and methods include receiving a modulated, encoded input stream. Channel memory is reduced using coarse digital backpropagation and other channel impairments are removed using turbo equalization. Symbols are detected in the input stream that conform to a non-uniform, polar constellation having a Gaussian source distribution to produce a stream of encoded data. The stream of encoded data is decoded with one or more low density parity check (LDPC) decoders.

摘要翻译： 使用发射机/接收机的光通信系统和方法。 系统和方法包括接收经调制的编码的输入流。 使用粗数字反向传播减少信道存储，并且使用turbo均衡消除其他信道损伤。 在符合具有高斯源分布的非均匀极坐标的输入流中检测符号以产生编码数据流。 编码数据流用一个或多个低密度奇偶校验（LDPC）解码器解码。