Nakagami衰落信道的信噪比估计及其在Turbo译码中的应用  

Estimation of Signal to Noise Ratio for Nakagami Fading Channel and Its Application to Turbo Decoding

作　　者：祁玉生[1] 张银华[2] 

机构地区：[1]南京邮电学院通信工程系,江苏南京210003 [2]南京中兴通讯研究所,江苏南京210012

出　　处：《南京邮电学院学报（自然科学版）》2003年第1期1-5,共5页Journal of Nanjing University of Posts and Telecommunications

摘　　要：在Turbo译码中,需要精确的信噪比信息来计算子译码器生成的外信息,而在无线衰落信道中,Nakagami衰落信道具有通用性,文中对Summer信噪比估计算法进行了改进,使之能够应用于Nakagami衰落信道。最后,对应用了改进Summer信噪比的Turbo译码进行了性能仿真。从结果可以看出,改进的Summer信噪比估计算法能够成功应用到Turbo译码中,使得Turbo译码获得良好的性能。While the estimation of signal to noise ratio for fading channel is necessary to calculate outerinformation produced by subdecoder,in Turbo decoding, Nakagami fading channel is considued to be generic within wireless fading channels.This paper provides with improvement of SUMMER signal to noise ratio estimation algorithm appliable Nakagami fading channel.Performance simulation is conducted for the turbo decoding with improved summer signal to noise ratio. The results have shown that the improved SUMMER signal to noise estimation algorithm can be satisfactorily applied to Turbo decoding with good performance.

关 键 词：NAKAGAMI衰落信道 信噪比估计 TURBO译码 Summer信噪比 估计算法 

分 类 号：TN911.22[电子电信—通信与信息系统]