DTMB标准中LDPC译码器的优化设计与实现

Optimized Design and Implement of LDPC Decoder in DTMB

介绍了一种适用于中国数字电视国标(DTMB)系统的低密度奇偶校验码(LDPC)译码器的新结构。该结构利用分块译码的方法复用相同的资源以达到提高资源利用效率的目的,实验结果表明该结构译码器相比于传统的半并行译码器在资源利用效率上有较大的提高。同时,该结构也可应用于其他LDPC码的译码器上,尤其对码长较长的LDPC码有较好的表现。

In this paper,we introduce a new structure LDPC decoder for DTMB.A reuse method based on check matrix splitting is proposed to increase the resource efficiency of this decoder.Simulation results demonstrate that the new structure decoder has higher resource utilization efficiency than usual partial parallel decoder.In addition,the new structure can also be applied to other LDPC decoder,especially to LDPC codes with long code words.