一种二级级联纠错编码的设计与分析

摘要

In the process of signal transmission, the received signal would be distorted or produce error code due to external noise and bad channel conditions. According to the problem, a scheme of concatenated error correction coding which corrects random errors by BCH coding and burst errors by RS coding, is designed and analyzed in this paper. In this scheme, RS decoder takes the advantage of the output information of BCH decoder, i.e. punctured decoding algorithm to decode RS code. Simulation results show that the proposed scheme highly improves error correction performance.%　　由于信号在传输过程中不可避免地会受到外界噪声的干扰，信道的不理想也会带来信号的畸变，因此可能导致接收信号发生错误。针对这一问题，结合工程技术的实际情况，对一种BCH＋RS级联编码进行设计和分析，采用BCH码和RS码分别纠正随机误码和突发误码，并充分利用BCH码的解码信息，采用删除译码方式对RS码进行译码，仿真结果说明该方法对纠错的效果有较大的改善。