一种基于SOVA的改进的Turbo码译码方案  

An Improved SOVA Based Decoding Scheme for Turbo Codes

作　　者：徐澄圻[1] 陈晶沪[1] 

机构地区：[1]南京邮电学院,南京210003

出　　处：《通信学报》1999年第12期1-8,共8页Journal on Communications

基　　金：国家自然科学基金!(批准号:69872016)

摘　　要：本文在研究Ｔｕｒｂｏ 码反向ＳＯＶＡ（Ｓｏｆｔ－Ｏｕｔｐｕｔ ＶｉｔｅｒｂｉＡｌｇｏｒｉｔｈｍ ）译码性能的基础上，提出了一种同时利用正向和反向ＳＯＶＡ译码软输出信息的基于ＳＯＶＡ 的改进译码结构及其相应的软输出修正公式。计算机模拟结果表明，所提出的改进方案与传统的ＳＯＶＡ算法相比，其译码性能有明显的改善。Based on studying the decoding performance of parallel concatenated convolutional(turbo)codes(PCCCs)by using SOVA with backward recursion(B SOVA),an improved SOVA based decoding structure and a revised formula of soft output involved are proposed in this paper,in which the soft output information of B SOVA combined with that of SOVA(with forward recursion,as normal)is considered.The computer simulation results show that the decoding performance of the proposed scheme is obviously improved compared with that of the normal SOVA and is even slightly superior to that of Max Log MAP.

关 键 词：信道编码 TURBO码 译码 SOVA 

分 类 号：TN911.22[电子电信—通信与信息系统]