摘要
无线光通信技术是当前研究的一个热点,为了对无线光通信系统的性能进行分析,采用APD探测器的Webb-Gaussian模型,对采用脉冲位置调制(PPM)方式的光通信系统性能进行分析,重点分析瞄准误差和背景光对误码率的影响,基于Matlab进行数值仿真。结果表明,要使光通信系统达到10^(-6)的误码率,瞄准误差必须控制在0.15倍束宽以内,每个PPM时间间隙的背景光子数必须控制在20个以下。同时,计算结果表明对APD的增益系数进行优化也可以降低误码率。
Wireless optical communication technology is a hot-spot problem. In order to analyze the performance of optical communication system, the effects of pointing error and background light to the BER of the PPM system are analyzed with the Webb-Gaussian model of APD and they are also simulated based on Matlab. The result shows that the pointing error must be controlled under 0.15 beam width and the amount of background photons per PPM slot must be controlled fewer than 20 to achieve 10-6 BER. At the same time, optimization of the APD＇s gain can depress the BER.
出处
《大气与环境光学学报》
CAS
2007年第5期396-400,共5页
Journal of Atmospheric and Environmental Optics
