摘要
准循环低密度奇偶校验码是LDPC的一个重要分支。这类码具有编、译码器便于实现,信息吞吐率高等优势,因而被许多通信系统及协议所采用。同其他LDPC类似,它们的设计通常难以兼顾收敛速度和误码基底两方面的性能。针对基于多元域的代数构造方法得到的QC-LDPC,给出了一种掩码(masking)方法来构造高性能的非规则QC-LDPC。理论分析和仿真结果显示,相比一些被广泛使用的LDPC,本文的设计方法能够在保证码字收敛门限更低的同时,有效地降低错误基底。
Quasi-cyclic low density parity check codes （QC-LDPC） form one of the most popular class of LDPC. With advantages in high throughput encoding and decoding, they has been adopted by many communication systems and protocols. However, they are usually diffi- cult to obtain good threshold and low error-floor in the same time. A new method for construc- ting irregular QC-LDPC, by masking QC-LDPC constructed with algebraic method based on GF （q）, is presented. It is shown that our codes outperform some wildly used QC-LDPC in both threshold and error-floor performance.
出处
《制导与引信》
2012年第1期37-43,共7页
Guidance & Fuze
关键词
低密度
奇偶校验
掩码
low density
parity check
masking
