摘要
介绍了采用多光束传输技术的激光通信系统模型,分析了考虑湍流内尺度条件下,大气湍流对系统误码率造成的影响。根据激光在大气湍流场中的传输方程和修正Rytov方法的光强闪烁理论,主要探讨了在考虑湍流内尺度效应的条件下,湍流内尺度、传输激光的波长以及大气折射率结构常数对系统误码率的影响。用MATLAB对其影响进行了数值模拟,并对结果进行了具体分析。结果表明:在中强起伏区,湍流内尺度对系统的误码率具有重要影响,在相同Rytov方差条件下,湍流内尺度越小,系统误码率越高;同时误码率还随着传输激光的波长以及大气折射率结构常数等的变化而变化。
A laser communication system model using multiple beam propagations technology was introduced and the effects of the atmospheric turbulence on the error rate in communication system was analyzed considerding the turbulence sizes. According to the equation of laser transmission in atmospheric turbulence field and the amended light intensity glitter theory of Rytov, the effects of turbulence sizes, wavelength of transmission laser and atmosphere refractive index structure constant on the error rate in communication system were discussed only considering the conditions of turbulence size effect. The MATLAB numerical simulation results show that turbulence sizes greatly influences the error rate of system in the middle-strong wave area, and the error rate will increase as the turbulence sizes decrease in the same Rytov variance, simultaneity the error rate will change with the wavelength of transmission laser and the atmosphere refractive index structure constant.
出处
《红外与激光工程》
EI
CSCD
北大核心
2009年第4期655-659,共5页
Infrared and Laser Engineering
基金
海军十一五预研项目(4010607020201)
关键词
激光通信
湍流
误码率
多光束发射与接收
Laser communication
Turbulence
Error rate
Multiple beam transmission and receiving
