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从多径衰落、阴影效应和多普勒效应三个方面研究宽带移动卫星通信信道的频率色散特性和多普勒功率谱非对称特性。基于WSSUS模型提出宽带移动卫星通信信道的统计模型。采用蒙特卡洛仿真方法对农村地区和城市地区两种信道的冲激响应和误码率特性进行仿真。仿真结果表明该信道模型能够真实反映宽带移动卫星通信信道的特性,对卫星通信系统关键技术设计具有参考价值。
The frequency dispersion characteristics of broadband mobile satellite communication channel and the asymmetry characteristics of Doppler power spectrum are studied from the aspects of multipath fading, shadowing effect and Doppler effect. A statistical model of broadband mobile satellite communication channel is proposed based on WSSUS model. Monte Carlo simulation method is used to simulate the impulse response and bit error rate of two kinds of channels in rural areas and urban areas. The simulation results show that the channel model can truly reflect the characteristics of broadband mobile satellite communication channel and is of reference value to the key technology design of satellite communication system.