UHF频段卫星移动信道建模与仿真

分析了UHF频段卫星移动信道衰落特性,分析了4种典型场景下多径分量的多普勒功率谱和多径时延功率谱。利用WSSUS模型,结合电离层闪烁和阴影效应的程度,分别建立了4种场景下的信道模型。根据理论计算和参考文献分析了不同场景下信道的参数,对卫星移动信道模型进行了仿真,并给出了不同场景的误码率性能曲线。仿真结果表明,该信道模型能够真实反映UHF卫星移动信道的特性,对于卫星移动通信系统关键技术的研究具有指导意义。

Modeling and Simulation of Satellite Mobile Communication Channel

The fading characteristics of UHF satellite mobile channel is analyzed. The Doppler spectrum expression and the multipath delay spectrum expression of multipath components in four typical scenes are analyzed. On the basis of WSSUS (Wide-Sense Stationary Uncorrelated Scattering) model, the channel models of four scenes are built considering the degree of scintillation and shadowing. With theory computation and related references, the parameters of different channels are analyzed and the satellite mobile channel models are simulated. In the end, the bit error rate performance curves are given. The simulation results shows that the proposed channel model can truly reflect the characteristics of UHF satellite mobile channel. The model in this paper is of guiding significance in exploration and research of satellite mobile communication.