大气湍流对近地无线光通信链路影响的研究

Research on Influence of Atmospheric Turbulence on Near Ground Wireless Optical Communication Links

大气湍流是影响大气无线光通信系统性能的主要因素之一,其影响主要表现为光通信系统中接收端接收的光强存在闪烁效应。本文将这种闪烁效应看作是光通信系统传输的乘性噪声,对光通信系统的传输性能进行了仿真和分析并与采用Turbo码编码的系统进行了比较。仿真结果表明,Turbo码是用来抑制大气湍流影响的一种有效的编码方式。

Atmospheric turbulence is one of the main factors that degrade the performance of wireless optical communication. It can result in the scintillation effect in the received optical intensity. In this paper, the scintillation effect is considered as the multiple noise, and then the performance of the optical communication system is simulated, analyzed and compared with that of the system using Turbo coding. The simulated results show that Turbo code is an effective coding to control atmospheric turbulence.