【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。更多还原

【Abstract】 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.更多还原