An LDPC code structure using cyclic shift matrices and an efficient LDPC code construction algorithm using the characteristic matrices is proposed.

本文研究了一种基于循环移位矩阵结构的LDPC码，提出了一种高效的基于特征矩阵的LDPC码构造算法。

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According to the structure of Quasi-Cyclic LDPC code, we can make a trade-off between hardware complexity and decoding throughput by applying semi-parallel architecture.

利用准循环ldpc码的结构特点，使用半并行结构的译码器可以实现复杂度和译码速率的有效折中。

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The decoder employs the Normalized MSA algorithm, and Partially Parallel structure for LDPC code in CMMB standard.

本译码器采用改进的最小和译码算法及符合CMMB标准要求的部分并行译码器结构。

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