大气激光通信系统中Turbo码译码性能仿真

The simulation of turbo-decoder in wireless optical communication system

由于大气激光通信信道对光信号的衰减极大,实际通信系统的编码应具有极强纠随机差错和纠突发差错的能力。针对大气激光通信信道的特殊性,结合当前优异的编码技术Turbo码对信道进行编码,通过对大气激光通信信道的分析对Turbo码编译码系统进行修正,建立了基于大气激光通信信道的系统模型,仿真分析了Turbo码实现低误码率的大气激光信息传输的可行性,并分析了采用不同算法和不同交织长度对系统性能的影响,为Turbo码在大气激光通信系统中的应用提供了理论基础。

Because of the enormous fading of the optical signal in wireless optical communication, the capacity of the error-correcting code must be well enough. Based on the complex of the atmospheric laser channel, we compare the performance of turbo-coded systems to code the channel. To modify the turbo-coded system by analysis the wireless optical communication, and then found the model based on the atmospheric channel. We use the simulink in Matlab, the corresponding results and the analysis are given to show the superior performance of turbo-code in atmospheric system, and we also analysis the performance in different arithmetic and the interlaced length.