基于交织的错误图样对DVB-S协议级联码译码性能的影响

The Influence Of Interlaced Error Patterns On The Decoding Performance Of DVB-S Protocol Concatenated Codes

摘要:

以DVB-S协议标准中物理层级联码作为研究对象,建立了由RS码、卷积码和卷积器交织器构成的典型级联码的通信模型,深入分析了级联码的体系结构,并在编码体制上找到了DVB-S协议标准中级联码存在的弱点,设计了一种基于交织的错误图样,给出了设计思路和具体设计方法,仿真研究了错误符号中含有不同错误比特数的错误图样对级联码译码性能的影响,并与突发错误图样进行了对比。仿真结果表明,基于交织的错误图样对级联码的译码性能影响要大于突发错误。

Abstract:

Taking the physical level code in the DVB-S protocol standard as the research object, a communication model consisting of RS codes, convolutional codes and convolutional interleaver is established, we analyze the architecture of concatenated codes, and find the weakness of the DVB-S protocol standard of concatenated codes exist in the encoding system, design an error pattern based on interleaving, gives the design ideas and specific design methods, the simulation effect of the error pattern with different number of error bits in error symbols of the concatenated codes the decoding performance, and compared with the burst error pattern. The simulation results show that the interlaced error pattern has a greater impact on the decoding performance of the concatenated code than the burst error.