分组码的Rayleigh分布的伪随机交错方案

Rayleigh-Distributed Pseudonym Random Inter-Ieaving Scheme of Block Codes

提出一种新的交错方案，即 Ｒａｙｌｅｉｇｈ分布的伪随机交错。对ＢＣＨ（６３，３９，４）ＢＣＨ（１２７，７８，７）码结合此种交错方案在Ｒａｙｌｅｉｇｈ衰落信道中的纠错性能进行了计算机仿真，且与周期交错方案的结果作了比较。仿真结果表明：在对误码率要求不高时，采用伪随机交错方案可减小平均时延；同时伪随机交错方案也具有加密功能。

This paper presents a novel pseudonym random interleaving scheme whose in- terleaving degree obeys Rayleigh distribution. The performance of BCH (63, 39, 4) and BCH (127, 78, 7 ) code using this scheme and periodic interleaving scheme in Rayleigh fading channels is obtained by simulation. The results show that pseudonym random interleaving can decrease the average time delay on some occasions and it is also a good cipher scheme.