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    • 1. 发明申请
    • METHOD AND APPARATUS FOR ADAPTING A BIT INTERLEAVER TO LDPC CODES AND MODULATIONS UNDER AWGN CHANNEL CONDITIONS USING BINARY ERASURE SURROGATE CHANNELS
    • 用于使用二进制擦除信道通道在AWGN信道条件下适应LDPC编码和调制的方法和装置
    • US20110182345A1
    • 2011-07-28
    • US12998270
    • 2009-10-02
    • Jing LeiWen Gao
    • Jing LeiWen Gao
    • H04B17/00
    • H03M13/251H03M13/11H03M13/1165H03M13/255H03M13/2757H03M13/356H04L1/0071H04L27/36
    • The present invention relates to code-dependent bit interleavers for parallel non-uniform channels. Since the channel dependence of a given code ensemble is dominated by the mutual information between the channel input and output, the present invention proposes to simplify the analysis about the decoding behavior by using a set of surrogate binary erasure channels. The approximation of the actual channel by the surrogate BEC is established on the equivalence of bitwise capacities, which represent the mutual information between the uniformly-distributed binary input and the likelihood ratios of the effective parallel AWGN channels. Moreover, the transition of the erasure probabilities is modeled by a linear difference equation around the decoding threshold SNR, from which we can derive a necessary condition on the convergence of decoding iterations and achieve a useful guideline for the configuration of the bit interleaver.
    • 本发明涉及用于并行非均匀信道的代码相关比特交织器。 由于给定代码集合的信道依赖性由信道输入和输出之间的相互信息支配,本发明提出通过使用一组替代二进制擦除信道来简化关于解码行为的分析。 代数BEC的实际信道的近似是基于位容量的等价性来确定的,这表示均匀分布的二进制输入与有效并行AWGN信道的似然比之间的相互信息。 此外,擦除概率的转换由围绕解码阈值SNR的线性差分方程建模,从中可以得出解码迭代收敛的必要条件,并为比特交织器的配置实现有用的指导。
    • 3. 发明授权
    • Method and apparatus for adapting a bit interleaver to LDPC codes and modulations under AWGN channel conditions using binary erasure surrogate channels
    • 用于使用二进制擦除代理信道在AWGN信道条件下使比特交织器适应LDPC码和调制的方法和装置
    • US08677219B2
    • 2014-03-18
    • US12998270
    • 2009-10-02
    • Jing LeiWen Gao
    • Jing LeiWen Gao
    • H03M13/00
    • H03M13/251H03M13/11H03M13/1165H03M13/255H03M13/2757H03M13/356H04L1/0071H04L27/36
    • The present invention relates to code-dependent bit interleavers for parallel non-uniform channels. Since the channel dependence of a given code ensemble is dominated by the mutual information between the channel input and output, the present invention proposes to simplify the analysis about the decoding behavior by using a set of surrogate binary erasure channels. The approximation of the actual channel by the surrogate BEC is established on the equivalence of bitwise capacities, which represent the mutual information between the uniformly-distributed binary input and the likelihood ratios of the effective parallel AWGN channels. Moreover, the transition of the erasure probabilities is modeled by a linear difference equation around the decoding threshold SNR, from which we can derive a necessary condition on the convergence of decoding iterations and achieve a useful guideline for the configuration of the bit interleaver.
    • 本发明涉及用于并行非均匀信道的代码相关比特交织器。 由于给定代码集合的信道依赖性由信道输入和输出之间的相互信息支配,本发明提出通过使用一组替代二进制擦除信道来简化关于解码行为的分析。 代数BEC的实际信道的近似是基于位容量的等价性来确定的,这表示均匀分布的二进制输入与有效并行AWGN信道的似然比之间的相互信息。 此外,擦除概率的转换由围绕解码阈值SNR的线性差分方程建模,从中可以得出解码迭代收敛的必要条件,并为比特交织器的配置实现有用的指导。