在恒星辐照度谱模型的基础上，根据卫星轨道理论及恒星数据库建立仿真实验系统，对低轨卫星与中继卫星间(LEO－GEO)、中继卫星间(GEO－GEO)、低轨卫星间(LEO－LEO)三种典型的星间激光链路进行了仿真研究，深入分析了恒星背景噪声对卫星光通信终端跟瞄子系统的影响规律、背景光功率等特性。仿真结果表明：对于视场较大的LEO终端，恒星进入视场的概率约为7%～10%，而对于视场较小的GEO终端，恒星进入视场的概率仅为0．05%，恒星背景光功率约为10^－13～10－¹¹W。该项工作对星间激光链路设计、光通信系统参数优化等工作具有一定指导意义。

Based on the stellar irradiance spectral function,satellite orbital theory and star database,an experimental simulation system was founded to study the influence of stellar background noise on tracking and pointing subsystem of intersatellite optical communications. The simulation study of three kinds of classic intersatellite optical links was done. From simulation results,the greater visual threshold,the probability of the star impacting on the Low Earth Orbit satellite is 7% to 10%. The probability of the star impacting on Geosynchronous Earth Orbit satellite is only 0.05%. The stellar noise power is 10^－13 to 10^－11W. The results will conduce to the design of intersatellite optical communication links and the research of system parameter optimization.