中文摘要：

基于传统的非视距单散射模型,结合大气的不均匀特性,提出了大气信道光学参数模型,仿真了不均匀条件下大气散射、消光廓线,分析了不同海拔高度的加权相函数。在该模型下,对不同距离的双基地激光通信脉冲响应和接收能量进行分析,并与均匀大气中的情况进行对比。研究表明：在不均匀大气中,散射、消光系数随着海拔的增大而减小；近地面总相函数与Mie散射相函数重合,海拔高度增大,总相函数逼近Rayleigh相函数；双基地激光通信存在的最佳发射接收仰角,此仰角下链路损耗最小。

英文摘要：

Based on the traditional non-line of sight single scatter model and the atmospheric nonuniformity,the atmospheric channel optical parametric model was proposed.The atmospheric scattering and extinction profiles were simulated in the nonuniform atmosphere,and the weighted phase functions were analyzed under different altitudes.In this model,the impulse response and the received energy are analyzed for the bistatic laser communication of different distances,and the obtained results compare with those in the uniform atmosphere.The research shows that the scattering coefficient and extinction coefficient decrease with the increase of altitude;the total phase function near the ground is coincident with the Mie scattering phase function,and the total phase function is close to the Rayleigh phase function with the increase of altitude;the bistatic laser communication has the optimal transmitting and receiving apex angle,the link loss is the lowest at this apex angle.