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对移动多媒体广播(CMMB)标准中的低密度奇偶校验(LDPC)码的校验矩阵结构进行了分析,针对其结构确立了一种可行的编码方法,即基于R.M.Neal的理论采用LU分解法。总结并验证了三种实用的三角矩阵(LU算法),经过比较,在提出的算法中选择一个最优的方案进行编码。仿真结果表明,所选方法能够正确编码,且具有先进性,对于具体硬件实现有很好的实用价值。同时所列的三种LU算法,对于其他满足条件的矩阵也是通用的。
The structure of parity check matrix of Low Density Parity Check (LDPC) code in Mobile Multimedia Broadcasting (CMMB) standard is analyzed, and a feasible coding method is established for its structure, that is, the LU decomposition method based on RMNeal . Three practical triangular matrices (LU algorithm) are summarized and verified. After comparison, an optimal scheme is selected for encoding in the proposed algorithm. The simulation results show that the selected method can be correctly encoded and advanced, which has good practical value for specific hardware implementation. The three LU algorithms listed at the same time are also common to other matrices that satisfy the conditions.