LDPC codes and stochastic decoding for optical transmission
    12.
    发明授权
    LDPC codes and stochastic decoding for optical transmission 有权
    用于光传输的LDPC码和随机解码

    公开(公告)号:US08099645B2

    公开(公告)日:2012-01-17

    申请号:US12195525

    申请日:2008-08-21

    IPC分类号: G06F11/00

    摘要: A method for error correction and a decoder using low density parity check (LDPC) codes includes initializing extrinsic probability information between variable nodes and check nodes in a bipartite graph including generating a Bernoulli sequence according to a probability of a bit having a value one. Parity checking is performed in accordance with a parity check equation. If the parity check equation is not satisfied, then extrinsic information is updated in check nodes from variable nodes using a parity node update logic circuit in a first half iteration, extrinsic information is updated in variable nodes from check nodes using a variable node update logic circuit in a second half iteration, and the variable nodes are updated with a probability based upon the extrinsic information passed between check nodes and variable nodes wherein the probability represents a likelihood that an ith bit is a one. Information bits are passed when the parity check equation is satisfied or a predetermined number of iterations has been reached.

    摘要翻译: 用于纠错的方法和使用低密度奇偶校验(LDPC)码的解码器包括在二分图中的可变节点和校验节点之间初始化外在概率信息,包括根据具有值1的比特的概率生成伯努利序列。 根据奇偶校验方程执行奇偶校验。 如果奇偶校验方程不满足,则在第一半迭代中使用奇偶校验节点更新逻辑电路,从可变节点的校验节点中更新外部信息,使用可变节点更新逻辑电路从校验节点在变量节点中更新外部信息 在第二半迭代中,并且基于在校验节点和可变节点之间传递的外部信息的概率来更新变量节点,其中概率表示第i位是一个的可能性。 当满足奇偶校验等式或达到预定数量的迭代时,信息比特被传递。

    MULTIDIMENSIONAL TURBO PRODUCT CODES AND GENERALIZED LOW-DENSITY PARITY-CHECK CODES WITH COMPONENT REED-SOLOMON CODES FOR OPTICAL TRANSMISSION
    14.
    发明申请
    MULTIDIMENSIONAL TURBO PRODUCT CODES AND GENERALIZED LOW-DENSITY PARITY-CHECK CODES WITH COMPONENT REED-SOLOMON CODES FOR OPTICAL TRANSMISSION 有权
    多组份涡轮产品代码和通用低密度奇偶校验码与组件光电代码进行光传输

    公开(公告)号:US20090282314A1

    公开(公告)日:2009-11-12

    申请号:US12392374

    申请日:2009-02-25

    IPC分类号: H03M13/29 G06F11/10

    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。

    GLDPC ENCODING WITH REED-MULLER COMPONENT CODES FOR OPTICAL COMMUNICATIONS
    15.
    发明申请
    GLDPC ENCODING WITH REED-MULLER COMPONENT CODES FOR OPTICAL COMMUNICATIONS 有权
    GLDPC编码用于光通信的冗余组件代码

    公开(公告)号:US20090199065A1

    公开(公告)日:2009-08-06

    申请号:US12189759

    申请日:2008-08-11

    IPC分类号: H03M13/05 G06F11/10

    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。

    Multidimensional hybrid modulations for ultra-high-speed optical transport
    17.
    发明授权
    Multidimensional hybrid modulations for ultra-high-speed optical transport 有权
    用于超高速光学传输的多维混合调制

    公开(公告)号:US08743984B2

    公开(公告)日:2014-06-03

    申请号:US13441814

    申请日:2012-04-06

    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。

    Four-dimensional non-binary LDPC-coded modulation schemes for ultra high-speed optical fiber communication
    18.
    发明授权
    Four-dimensional non-binary LDPC-coded modulation schemes for ultra high-speed optical fiber communication 有权
    用于超高速光纤通信的四维非二进制LDPC编码调制方案

    公开(公告)号:US08719656B2

    公开(公告)日:2014-05-06

    申请号:US13441808

    申请日:2012-04-06

    IPC分类号: H03M13/00 H04L1/18

    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。

    MULTIDIMENSIONAL HYBRID MODULATIONS FOR ULTRA-HIGH-SPEED OPTICAL TRANSPORT
    19.
    发明申请
    MULTIDIMENSIONAL HYBRID MODULATIONS FOR ULTRA-HIGH-SPEED OPTICAL TRANSPORT 有权
    用于超高速光学传输的多维混合调制

    公开(公告)号:US20120263466A1

    公开(公告)日:2012-10-18

    申请号:US13441814

    申请日:2012-04-06

    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。

    FOUR-DIMENSIONAL OPTICAL MULTIBAND-OFDM FOR BEYOND 1.4TB/S SERIAL OPTICAL TRANSMISSION
    20.
    发明申请
    FOUR-DIMENSIONAL OPTICAL MULTIBAND-OFDM FOR BEYOND 1.4TB/S SERIAL OPTICAL TRANSMISSION 有权
    用于1.4TB / S串行光传输的四维光学多通道OFDM

    公开(公告)号:US20120257895A1

    公开(公告)日:2012-10-11

    申请号:US13251214

    申请日:2011-10-01

    IPC分类号: H04J14/06 H04J14/00

    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。