基于DSP的LDPC码通用快速编码器设计

摘要

针对CCSDS 131.1-O-2中给出的一类适用于深空通信的准循环LDPC删余码进行研究,分析了两种常见的编码算法的复杂度,改进了“贪婪算法”,并提出了一种新的矩阵压缩方法,该方法较大地降低了编码复杂度,并且适用于所有LDPC码.最后,基于TMS320C6416 DSP平台,在两种编码算法下实现了LDPC码的高速编码,最高编码速率可达100 Mbit/s.%The punctured Quasi-Cyclic Low-Density Parity-Check (QC-LDPC) codes for use in deep space applications proposed by CCSDS 131.1-0-2 is investigated in this paper. Two common encoding methods are analysised, improve the method called " Greedy Algorithm" and then, design a new scheme for matrix compression. This scheme is common to all kinds of LDPC codes. Finally, based on the DSP platform TMS320C6416 with the matrix compression method, high speed of LDPC codes encoding is realied which reaches 100 Mbit/s.