摘要
研究了开关键控(OOK)调制下天空背景辐射对误码率的影响,介绍了通信端机收到的天空背景辐射的仿真方法。仿真结果表明:通信误码率一定时,天空背景辐射的上限值与接收信号光功率和雪崩光电二极管(APD)的电噪声大小有关。太阳直接辐射是大气激光通信系统接收到的主要背景辐射,大气散射相对于太阳直接辐射十分微弱。当太阳天顶角较小时,可以采取端机视轴规避太阳一定角度的方式,保证通信系统的误码率小于10-9。
The influence of sky background radiation on bit error rate （BER） under on off keying （OOK） modulation is studied, and the simulation method of sky background radiation received by the communication terminal is introduced. Simulation results show that when the communication BER is constant, the upper threshold of sky background radiation is related to the received signal optical power and the electrical noise of avalanche photodiode （APD）. Direct solar radiation is the major background radiation received by atmospheric laser communication system, and atmospheric scattering, relative to the direct solar radiation, is very weak. When the solar zenith angle is small, the optic axis of the communication terminal can be adopted to avoid certain sun radiation angle, and it is ensured that the BER of the communication system is less than 10^-9.
出处
《激光与光电子学进展》
CSCD
北大核心
2016年第7期59-66,共8页
Laser & Optoelectronics Progress
基金
国家自然科学基金(11403064
61102023)
关键词
大气光学
激光通信
天空背景辐射
误码率
太阳辐射
大气散射
atmospheric optics
laser communication
sky background radiation
bit error rate
solar radiation
atmospheric scattering
