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309 条记录 (耗时 0.031 秒)

    Reverse concatenated encoding and decoding
    3.
    发明授权
    Reverse concatenated encoding and decoding 有权
    反向级联编码和解码

    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。

    Reduced-complexity LDPC decoding
    4.
    发明授权
    Reduced-complexity LDPC decoding 有权
    降低复杂度的LDPC解码

    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。

    GLDPC encoding with Reed-Muller component codes for optical communications
    5.
    发明授权
    GLDPC encoding with Reed-Muller component codes for optical communications 有权
    用于光通信的Reed-Muller组件代码的GLDPC编码

    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。

    Generalized OFDM (GOFDM) for ultra-high-speed serial optical transport networks
    9.
    发明授权
    Generalized OFDM (GOFDM) for ultra-high-speed serial optical transport networks 有权
    用于超高速串行光传输网络的广义OFDM（GOFDM）

    公开(公告)号：US08699625B2

    公开(公告)日：2014-04-15

    申请号：US13270211

    申请日：2011-10-10

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

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

    IPC分类号： H03K9/00 ,  H04Q11/02 ,  H04B3/20

    CPC分类号： H04L1/0057 ,  H04L1/0042 ,  H04L5/0016 ,  H04L5/04 ,  H04L25/067 ,  H04L27/2628 ,  H04L27/3427

    摘要： A coded multidimensional modulation system called generalized OFDM (GOFDM) uses orthogonal subcarriers as bases functions, and the signal constellation points of corresponding multidimensional constellation diagram are obtained as N-dimensional Cartesian product of one-dimensional PAM/two-dimensional QAM. In GOFDM, the N-dimensional/2N-dimensional signal constellation point is transmitted over all N subcarriers/2N-subcarriers, which serve as individual bases functions. Even if some of the subcarriers are severely affected by channel distortion, the overall signal constellation point will face only small distortion, when strong channel capacity achieving channel codes are used. In addition, because the channel capacity is a linear function of number of dimensions, the spectral efficiency of optical transmission systems is significantly improved. Finally, since Euclidean distance of multidimensional signal constellation is much larger that that of two-dimensional signal constellations, OSNR sensitivity is dramatically improved.

    摘要翻译： 称为广义OFDM（GOFDM）的编码多维调制系统使用正交子载波作为基本功能，并且获得相应多维星座图的信号星座点作为一维PAM /二维QAM的N维笛卡尔乘积。 在GOFDM中，N维/ 2N维信号星座点在用作各个基本功能的所有N个子载波/ 2N个子载波上发送。 即使某些子载波受到信道失真的严重影响，当使用实现信道码的强信道容量时，整个信号星座点也只会面临小的失真。 另外，由于信道容量是维数的线性函数，所以光传输系统的频谱效率显着提高。 最后，由于多维信号星座的欧几里德距离远大于二维信号星座的距离，因此OSNR灵敏度得到显着提高。

    GENERALIZED OFDM (GOFDM) FOR ULTRA-HIGH-SPEED SERIAL OPTICAL TRANSPORT NETWORKS
    10.
    发明申请
    GENERALIZED OFDM (GOFDM) FOR ULTRA-HIGH-SPEED SERIAL OPTICAL TRANSPORT NETWORKS 有权
    用于超高速串行光传输网络的通用OFDM（GOFDM）

    公开(公告)号：US20120263251A1

    公开(公告)日：2012-10-18

    申请号：US13270211

    申请日：2011-10-10

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

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

    IPC分类号： H04L23/02 ,  H04L27/28

    CPC分类号： H04L1/0057 ,  H04L1/0042 ,  H04L5/0016 ,  H04L5/04 ,  H04L25/067 ,  H04L27/2628 ,  H04L27/3427

    摘要： A coded multidimensional modulation system called generalized OFDM (GOFDM) uses orthogonal subcarriers as bases functions, and the signal constellation points of corresponding multidimensional constellation diagram are obtained as N-dimensional Cartesian product of one-dimensional PAM/two-dimensional QAM. In GOFDM, the N-dimensional/2N-dimensional signal constellation point is transmitted over all N subcarriers/2N-subcarriers, which serve as individual bases functions. Even if some of the subcarriers are severely affected by channel distortion, the overall signal constellation point will face only small distortion, when strong channel capacity achieving channel codes are used. In addition, because the channel capacity is a linear function of number of dimensions, the spectral efficiency of optical transmission systems is significantly improved. Finally, since Euclidean distance of multidimensional signal constellation is much larger that that of two-dimensional signal constellations, OSNR sensitivity is dramatically improved.

    摘要翻译： 称为广义OFDM（GOFDM）的编码多维调制系统使用正交子载波作为基本功能，并且获得相应多维星座图的信号星座点作为一维PAM /二维QAM的N维笛卡尔乘积。 在GOFDM中，N维/ 2N维信号星座点在用作各个基本功能的所有N个子载波/ 2N个子载波上发送。 即使某些子载波受到信道失真的严重影响，当使用实现信道码的强信道容量时，整个信号星座点也只会面临小的失真。 另外，由于信道容量是维数的线性函数，所以光传输系统的频谱效率显着提高。 最后，由于多维信号星座的欧几里德距离远大于二维信号星座的距离，因此OSNR灵敏度得到显着提高。