公开(公告)号：US08595585B2

公开(公告)日：2013-11-26

申请号：US13116249

申请日：2011-05-26

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

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

IPC分类号： H03M13/00 ,  G06F11/00

CPC分类号： H03M13/2963 ,  H03M13/1102 ,  H03M13/1117 ,  H03M13/136 ,  H03M13/152 ,  H03M13/6331 ,  H04L1/005 ,  H04L1/0057

摘要： Methods and systems for transmitting and receiving data include reverse concatenated encoding and decoding. Reverse concatenated decoding includes inner decoding the encoded stream with an inner decoder that uses a low-complexity linear-block code to produce an inner-decoder output stream, outer decoding the inner-decoder output stream with an outer decoder that uses a low-density parity-check code to produce an information stream, and iterating extrinsic bit reliabilities from the outer decoding for use in subsequent inner decoding to improve decoding performance.

摘要翻译： 发送和接收数据的方法和系统包括反向级联编码和解码。 反向级联解码包括使用内部解码器对编码流进行内部解码，内部解码器使用低复杂度线性块码来产生内部解码器输出流，使用外部解码器对内部解码器输出流进行外部解码，外部解码器使用低密度 奇偶校验码产生信息流，以及从外部解码中迭代外部位可靠性，用于随后的内部解码以提高解码性能。

公开(公告)号：US08589755B2

公开(公告)日：2013-11-19

申请号：US13114793

申请日：2011-05-24

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

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

IPC分类号： H03M13/00 ,  G06F11/00

CPC分类号： H03M13/1117 ,  H03M13/6502 ,  H03M13/658 ,  H04L1/0047 ,  H04L1/0054 ,  H04L1/0057 ,  H04L1/0071

摘要： Methods and systems for reduced-complexity decoding of low-density parity-check (LDPC) information. An encoded input stream is received. The received stream is decoded with one or more reduced-complexity min-sum or a posteriori probability LDPC decoders. A v-node update rule in the reduced complexity decoder is omitted.

摘要翻译： 用于低密度奇偶校验（LDPC）信息的降低复杂度解码的方法和系统。 接收编码的输入流。 所接收的流被解码为一个或多个复杂度较低的最小和或后验概率LDPC解码器。 省略了复杂度降低的解码器中的v节点更新规则。

公开(公告)号：US08386879B2

公开(公告)日：2013-02-26

申请号：US12189759

申请日：2008-08-11

申请人： Ivan B Djordjevic ,  Lei Xu ,  Ting Wang ,  Milorad Cvijetic

发明人： Ivan B Djordjevic ,  Lei Xu ,  Ting Wang ,  Milorad Cvijetic

IPC分类号： G06F11/00

CPC分类号： H03M13/1174 ,  H03M13/136

摘要： A method of encoding for optical transmission of information includes encoding information with a generalized low-density parity-check (GLDPC) code for providing coding gains, and constructing the GLDPC code with a Reed-Muller RM code as a component code, the component code being decodable using a maximum posterior probability (MAP) decoding. In a preferred embodiment, the GLDPC code includes a codeword length of substantially 4096, an information word length of substantially 3201, a lower-bound on minimum distance of substantially greater than or equal to 16, a code rate of substantially 0.78 and the RM component code includes an order of substantially 4 and an r parameter of substantially 6.

摘要翻译： 用于信息的光传输的编码方法包括使用用于提供编码增益的广义低密度奇偶校验（GLDPC）码的编码信息，以及用作为分量代码的里德 - 穆勒RM码构建GLDPC码， 使用最大后验概率（MAP）解码来解码。 在优选实施例中，GLDPC代码包括基本上为4096的码字长度，基本为3201的信息字长度，基本上大于或等于16的最小距离的下限，码率基本上为0.78，并且RM分量 代码包括基本为4的顺序和基本为6的r参数。

公开(公告)号：US20120257896A1

公开(公告)日：2012-10-11

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： H04J14/00 ,  H04J14/06

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：US20120141138A1

公开(公告)日：2012-06-07

申请号：US12959874

申请日：2010-12-03

申请人： Qi YANG ,  Zhixue HE ,  Wu LIU ,  William SHIEH ,  Ivan B. DJORDJEVIC ,  Zhu YANG ,  Shaohua YU

发明人： Qi YANG ,  Zhixue HE ,  Wu LIU ,  William SHIEH ,  Ivan B. DJORDJEVIC ,  Zhu YANG ,  Shaohua YU

IPC分类号： H04B10/02 ,  H04B10/00

CPC分类号： H04L27/2096 ,  H04B10/548 ,  H04B10/611 ,  H04L1/0003 ,  H04L1/0057 ,  H04L27/223 ,  H04L27/2634 ,  H04L27/2697

摘要： The invention provides methods, devices and a system for recovering the corrupted subcarrier at the local oscillator (LO) frequency in coherent optical OFDM transmission. The method includes performing advanced coding on a data signal to obtain an encoded signal; performing high order modulation on the encoded signal to obtain a high-order-modulated signal; performing OFDM modulation on the high-order-modulated signal to obtain an electrical OFDM signal; and performing up-conversion on the electrical OFDM signal to obtain an optical OFDM signal to be output. The inventive technique of employing advanced coding with low rate combining with higher order modulation can be used to reduce the decoding bit error ratio (bit error rate) level, so that the LO subcarrier can be fully recovered while the bandwidth of the transmitted signal may be substantially the same as the existing optical OFDM system, and there is no need to add any feedback control module or feedback loop support or the like to the existing optical OFDM system, so that the complexity of the receiving side can be reduced.

摘要翻译： 本发明提供用于在相干光OFDM传输中恢复本地振荡器（LO）频率处的损坏子载波的方法，装置和系统。 该方法包括对数据信号执行高级编码以获得编码信号; 对编码信号执行高阶调制以获得高阶调制信号; 对高阶调制信号进行OFDM调制以获得电子OFDM信号; 并对电子OFDM信号执行上变频以获得要输出的光OFDM信号。 可以使用以较低速率组合高阶调制的高级编码的本发明技术来减少解码误码率（误码率）电平，使得LO子载波可以完全恢复，而发射信号的带宽可以是 与现有的光学OFDM系统基本相同，并且不需要向现有的光学OFDM系统添加任何反馈控制模块或反馈环路支持等，从而可以减少接收侧的复杂性。

公开(公告)号：US20090052907A1

公开(公告)日：2009-02-26

申请号：US12050507

申请日：2008-03-18

申请人： HUSSAM G. BATSHON ,  IVAN B. DJORDJEVIC ,  LEI XU ,  TING WANG ,  MILORAD CVIJETIC

发明人： HUSSAM G. BATSHON ,  IVAN B. DJORDJEVIC ,  LEI XU ,  TING WANG ,  MILORAD CVIJETIC

IPC分类号： H04B10/04 ,  H04B10/06 ,  G06F11/00

CPC分类号： H04L27/3416 ,  H04L1/005 ,  H04L1/0057 ,  H04L1/0071 ,  H04L25/03178 ,  H04L25/067 ,  H04L2025/03611

摘要： A transmitter and method include a LDPC encoder configured to encode source data, and a mapper configured to generate three coordinates in accordance with a 3D signal constellation where the coordinates include an amplitude coordinate and two phase coordinates. A laser source is modulated in accordance with each of the three coordinates to provide a transmission signal. A receiver, includes a demapper receives an input signal from three branches to demap the input signal using a three-dimensional signal constellation having three coordinates. The three branches include a direct detection branch, and two coherent detection branches such that the direct detection branch detects an amplitude coordinate of the input signal and the two coherent detection branches detect in-phase and quadrature coordinates of the input signal. A bit prediction module and at least one LDPC decoder are configured to iteratively decode bits by feeding back extrinsic LLRs to the demapper.

摘要翻译： 发射机和方法包括被配置为对源数据进行编码的LDPC编码器，以及映射器，被配置为根据其中坐标包括振幅坐标和两个相位坐标的3D信号星座生成三个坐标。 根据三个坐标中的每一个调制激光源，以提供发送信号。 接收机包括解映射器，接收来自三个分支的输入信号，以使用具有三个坐标的三维信号星座对输入信号进行解映射。 三个分支包括直接检测分支和两个相干检测分支，使得直接检测分支检测输入信号的幅度坐标，并且两个相干检测分支检测输入信号的同相和正交坐标。 比特预测模块和至少一个LDPC解码器被配置为通过将外部LLR反馈到解映射器来迭代地解码比特。

公开(公告)号：US20080294968A1

公开(公告)日：2008-11-27

申请号：US11941747

申请日：2007-11-16

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

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

IPC分类号： H03M13/03 ,  G06F11/10

CPC分类号： H03M13/1111 ,  H03M13/255 ,  H03M13/6325

摘要： An optical communication system includes a bit-interleaved coded modulation (BICM) coder; and a low-density parity-check (LDPC) coder coupled to the BICM coder to generate codes used as component codes and in combination with a coherent detector.

摘要翻译： 光通信系统包括位交织编码调制（BICM）编码器; 以及耦合到BICM编码器的低密度奇偶校验（LDPC）编码器，以生成用作分量代码并与相干检测器组合的代码。

公开(公告)号：US09203544B2

公开(公告)日：2015-12-01

申请号：US12959689

申请日：2010-12-03

申请人： Qi Yang ,  Wu Liu ,  Zhixue He ,  William Shieh ,  Ivan B. Djordjevic ,  Zhu Yang ,  Shaohua Yu

发明人： Qi Yang ,  Wu Liu ,  Zhixue He ,  William Shieh ,  Ivan B. Djordjevic ,  Zhu Yang ,  Shaohua Yu

IPC分类号： H04B10/516 ,  H04J14/02 ,  H04J14/06 ,  H04L1/00

CPC分类号： H04J14/0298 ,  H04B10/516 ,  H04J14/02 ,  H04J14/0279 ,  H04J14/06 ,  H04L1/0065

摘要： A transmitting device, a receiving device, an optical communication system, and associated methods are provided. The transmitting device transmits an optical signal containing data, and comprises: an optical tone generator for generating at least one optical tone; at least one encoder for performing advanced coding on at least one data signal respectively, each of the at least one data signal carrying a part of the data; at least one mapper for performing high order modulation on the at least one coded data signal; and an up-converter for up-converting the at least one high-order-modulated data signal into the optical signal to be outputted through the at least optical tone. Thereby, high speed (e.g., over 1-Tb/s) transmission per single channel over a long-haul distance (e.g. over 1000-km) with error-free recovery may be achieved.

摘要翻译： 提供了发送设备，接收设备，光通信系统和相关联的方法。 发送装置发送含有数据的光信号，并且包括：光学乐音发生器，用于产生至少一个光学色调; 至少一个编码器，用于分别对至少一个数据信号执行高级编码，所述至少一个数据信号中的每一个承载所述数据的一部分; 至少一个映射器，用于对所述至少一个编码数据信号执行高阶调制; 以及上变频器，用于将至少一个高阶调制数据信号上变频成通过至少光调而输出的光信号。 因此，可以实现具有无差错恢复的长距离（例如超过1000公里）的每个信道的高速（例如，超过1-Tb / s）的传输。

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。