非静止轨道卫星网络同频干扰的分析与仿真

由于非静止轨道卫星系统的增加，引起卫星网络间下行数传的同频干扰问题，针对非静止轨道卫星网络具有时变性的特点，给出了计算非静止轨道卫星网络同频干扰的思路和方法，对同频干扰进行了仿真，并分析了仿真结果，在此基础上实现了干扰过程的可视化，动态地描述出了仿真时段内不同时刻干扰链路的变化情况。

The Analysis and Simulation of Co-Frequency Interference in Non-Geostationary Orbit Satellite Network

With the increasing of non-geostationary orbit satellite systems, the frequency bands allocated to the non-geostationary orbit satellite are getting less, which would bring the co-frequency interference for data transmission in down-link of non-geostationary orbit satellite network. The ratio C/I between the useful received carrier power and the overall contribution at the receiver input of interference power can show the interference situation. This ratio depends on the system characteristics, such as type of orbits, number of satellites in the constellation, antenna radiation patterns, etc. This paper analyses the problem of co-frequency interference, according to the time-varied character of non-geostationary orbit satellite the paper introduces a method to calculate co-frequency interference. The co-frequency interference is simulated and the results is analyzed, then, visualization of the interfering course is realized which can dynamically display the changes of interference-link during the different simulation periods.