湍流大气中光外差接收中频信号电流几率分布特性  

Characteristics of IF Signal Current Probability Distribution for Optical Heterodyne Receivers in the Turbulent Atmosphere

作　　者：谢小川[1] 冯志超[1] 

机构地区：[1]西南技术物理研究所,电子科技大学,成都

出　　处：《应用激光》1991年第5期209-213,共5页Applied Laser

摘　　要：给出晴空大气湍流中光外差接收系统接收中频信号电流几率密度函数的表达式。分析了光外差系统在本振散粒噪声限下,中频信号振幅为对数正态分布,相位为高斯相位扰动时,中频信号电流的几率分布特性,并进行了数值计算。In this paper,an expression is derived for the probability density functions of thei.f.signal current from optical heterodyne receiver systems operating in the presence of cleai-airturbulence.In addition to local oscillator shot noise and the effects of log-normal amplitude fluc-tuation and Gaussian phase perturbations,the characteristics of i.f.signal current probabilitydistribution are analysed.Some numerical calculations are given.

关 键 词：大气通信 光外差 中频信号 电流 

分 类 号：TN929.12[电子电信—通信与信息系统]