卫星通信网络终端多载波干扰分析

Multi-carrier Interference Analysis of Satellite Communications Earth Terminal

在卫星通信网络终端体系架构中,每一个终端都能够同时接收多个不同频段的载波信息,卫星和终端的相对运动等因素而引起的频率偏移将会导致多载波间相互干扰。本文分析终端载干比、信噪比损失等性能因素与频率偏移的关系,仿真结果表明,这种干扰会导致终端的载干比下降、信噪比损失增加、误码率升高。分析与仿真结果将为下一步消除载波间干扰提供理论依据。

In the architecture of satellite communications earth terminal, every terminal can receive multi-carrier with different frequency at the same time, the factor such as the relative movement between the satellites and the terminals will produce frequency offset which can make interference among these carriers. This paper analyzes the effect of the frequency interference on the CIR, the loss of SNR and so on. The result of simulation shows that this interference will reduce the CIR of the system, the loss of SNR and BER of the system will be increased. The analysis provides a theoretical basis for the next step to eliminate inter--carrier interference .