规则RA码在混合信道上的高斯估计

Gaussian Approximation of Regular Repeat-Accumulate(RA) Codes over the Mixed Gaussian/Erasures Channels

将高斯估计方法运用到规则重复累积(RA)码在具有加性白色高斯噪声和删除干扰的混合信道上的性能分析中,导出了RA码在该信道上概率密度进化的递归等式和误码率的解析表达式。仿真结果验证了解析结果的正确性,因此解析结果可以直接用来预测RA码在混合信道上的性能。

In this paper, Gaussian approximation is applied in the performance analysis of repeat accumulate （BA） codes over the mixed white Oaussian noise/erasures channels, a recursive equation of evolution of density and analytic expression of bit error rate are derived. The analytic results provide a way to predict asymptotic performance of RA codes over the mixed channels. The comparison between simulation results and threshold computed from analytic results shows that the predication from the theoretical results is accurate.