摘要
低密度奇偶校验(LDPC)码是当前广泛应用的信道编码方式。多进制LDPC码在各类噪声的干扰下,纠错性能仍然极好,是如今信道编码学者重点研究方向。主要研究多进制LDPC码的编码和译码方法,通过软件仿真,分别对比不同编码和译码方法的纠错性能,并分析造成纠错性能差异的原因。主要对一种由二进制LDPC码中元素替换得到的四进制LDPC码,通过软件进行仿真分析,并最终得到5/6码率,采用16符号正交幅度调制(16QAM)方式的四进制LDPC码的编码结构。
Low density parity check（LDPC）code is a channel encoding mode commonly used at present.Non-binary（NB）-LDPC codes have great error correcting performance under various noises jamming,is an important research direction of channel encoding researchers.This paper mainly studies the encoding and decoding methods of NB-LDPC codes,compares the error correcting performance of different encoding and decoding methods through software simulation,and analyzes the reason leading to the difference of error correcting performance,mainly performs simulation analysis to 4-ary LDPC codes that are gained by replacing elements in binary LDPC,finally gains the encoding structure of 4-ary LDPC codes with the code ratio of 5/6by using 16-quadrature amplitude modulation（16QAM）mode.
出处
《舰船电子对抗》
2016年第2期53-57,61,共6页
Shipboard Electronic Countermeasure
