Method and apparatus for providing reduced memory low density parity check (LDPC) codes
    71.
    发明申请
    Method and apparatus for providing reduced memory low density parity check (LDPC) codes 有权
    用于提供减少的存储器低密度奇偶校验(LDPC)码的方法和装置

    公开(公告)号:US20050091565A1

    公开(公告)日:2005-04-28

    申请号:US10971510

    申请日:2004-10-22

    摘要: An approach is provided for generating Low Density Parity Check (LDPC) codes. An LDPC encoder generates a LDPC code with an outer Bose Chaudhuri Hocquenghem (BCH) code. For a rate 3/5 code, the approach provides a degree profile that yields reduced memory requirements for storage of the edge values without significantly affecting the performance with respect to an “unmodified” rate 3/5 code. The relevant parameters for the reduced memory LDPC codes are as follows: q=72, nldpc=64800, kldpc=nBCH=38880, kBCH=38688. The above approach has particular application in digital video broadcast services over satellite.

    摘要翻译: 提供了一种用于生成低密度奇偶校验(LDPC)码的方法。 LDPC编码器生成具有外部Bose Chaudhuri Hocquenghem(BCH)码的LDPC码。 对于速率为3/5的代码,该方法提供了一个程度分布,可以减少存储边缘值的内存需求,而不会显着影响“未修改”速率3/5代码的性能。 减少存储器LDPC码的相关参数如下:q = 72,n×lpc = 64800,k ldpc = n BCH = 38880 ,K BCH = 38688。 上述方法在卫星数字视频广播业务中具有特殊应用。

    Encoding low density parity check (LDPC) codes through an LDPC decoder
    72.
    发明申请
    Encoding low density parity check (LDPC) codes through an LDPC decoder 有权
    通过LDPC解码器对低密度奇偶校验(LDPC)码进行编码

    公开(公告)号:US20050003756A1

    公开(公告)日:2005-01-06

    申请号:US10883338

    申请日:2004-07-01

    CPC分类号: H03M13/1102 H03M13/2957

    摘要: An approach is providing for supporting broadcast transmission of low density parity check (LDPC) coded signals. A receiver includes a decoder configured to decode an LDPC signal to output a decoded signal. The decoder is further configured to operate as an encoder; as such, interference cancellation can be implemented by the encoder re-encoded the received decoded signal. The above approach has particular applicability to satellite broadcast systems.

    摘要翻译: 一种方法是提供支持低密度奇偶校验(LDPC)编码信号的广播传输。 接收机包括:解码器,被配置为解码LDPC信号以输出解码信号。 解码器还被配置为作为编码器操作; 因此,干扰消除可以由编码器重新编码接收的解码信号来实现。 上述方法对卫星广播系统具有特别的适用性。

    Turbo code interleaver with near optimal performance
    73.
    发明申请
    Turbo code interleaver with near optimal performance 有权
    Turbo码交织器具有接近最佳性能

    公开(公告)号:US20080059727A1

    公开(公告)日:2008-03-06

    申请号:US11980916

    申请日:2007-10-31

    IPC分类号: G06F12/00

    摘要: A method of interleaving blocks of indexed data of varying length is disclosed. The method includes the steps of: providing a set of basic Interleavers comprising a family of one or more permutations of the indexed data and having a variable length; selecting one of the basic Interleavers based upon a desired Interleaver length L; and adapting the selected basic Interleaver to produce an Interleaver having the desired Interleaver length L.

    摘要翻译: 公开了一种交织具有不同长度的索引数据块的方法。 该方法包括以下步骤:提供一组基本交错器,其包括索引数据的一个或多个排列的族,并具有可变长度; 基于所需的交织器长度L选择基本交织器之一; 并且使所选择的基本交织器适配以产生具有期望的交织器长度L的交织器。

    Turbo code interleaver with optimal performance
    78.
    发明授权
    Turbo code interleaver with optimal performance 有权
    具有最佳性能的Turbo码交织器

    公开(公告)号:US08321725B2

    公开(公告)日:2012-11-27

    申请号:US11980917

    申请日:2007-10-31

    IPC分类号: H03M13/27

    摘要: A method of interleaving blocks of indexed data of varying length is disclosed. The method includes the steps of: providing a set of basic Interleavers comprising a family of one or more permutations of the indexed data and having a variable length; selecting one of the basic Interleavers based upon a desired Interleaver length L; and adapting the selected basic Interleaver to produce an Interleaver having the desired Interleaver length L.

    摘要翻译: 公开了一种交织具有不同长度的索引数据块的方法。 该方法包括以下步骤:提供一组基本交错器,其包括索引数据的一个或多个排列的族,并具有可变长度; 基于所需的交织器长度L选择基本交织器之一; 并且使所选择的基本交织器适配以产生具有期望的交织器长度L的交织器。

    Turbo code interleaver with near optimal performance
    80.
    发明授权
    Turbo code interleaver with near optimal performance 有权
    Turbo码交织器具有接近最佳性能

    公开(公告)号:US06334197B1

    公开(公告)日:2001-12-25

    申请号:US09375067

    申请日:1999-08-16

    IPC分类号: H03M1327

    摘要: A method of interleaving blocks of indexed data of varying length is disclosed. The method includes the steps of: providing a set of basic Interleavers comprising a family of one or more permutations of the indexed data and having a variable length; selecting one of the basic Interleavers based upon a desired Interleaver length L; and adapting the selected basic Interleaver to produce an Interleaver having the desired Interleaver length L.

    摘要翻译: 公开了一种交织具有不同长度的索引数据块的方法。 该方法包括以下步骤:提供一组基本交错器,其包括索引数据的一个或多个排列的族,并具有可变长度; 基于所需的交织器长度L选择基本交织器之一; 并且使所选择的基本交织器适配以产生具有期望的交织器长度L的交织器。