卫星移动信道中Suzuki-Corazza混合模型仿真研究

The Study of Suzuki-Corazza Hybrid Mode Simulation in Mobile Satellite Channel

陆地移动卫星通信系统的复杂度越来越高,需要对信道模型进行建模以有效缩短通信系统的开发周期。色高斯随机过程是信道建模的基础,其产生方法是采用有限个加权正弦信号的叠加来近似。通过对衰落信道中的Suzuki模型和Corazza模型的研究,在这两种模型的基础上提出了一种新的Suzuki-Corazza全阴影混合模型。在这种模型中,Rayleigh过程和考虑视距分量的Rice过程分别被两个不相关的Lognormal随机过程影响,这种模型的自由度数增加,实际上增加了复杂性,但改善了模型的适应性。给出模型的仿真实现框图、一阶统计特性和计算机仿真。仿真结果表明,仿真结果与计算分析结果吻合得非常好。

The complexity of land mobile satellite is more and more increasing. Channel model needs to be modeled in order to effectively shorten the development cycle of communication systems. Colored gaussian process is the basis for channel modeling which is based on a superposition of a finite number of harmonic functions. A no- vel Suzuki - Corazza hybrid mode is proposed based on the study of Corazza and Suzuki in fading channels. In this model, Rayleigh process and Rice process taking the influence of a line - of - sight component into account are af- fected by two independent lognormal random processes, respectively. The increase of the number of degrees of free- dom of this mode, in fact increases the complexity, but improves the flexibility. The model＇ s simulation realization diagram, the first order of statistical properties, and the computer simulation are given. Simulation results show that simulation results are well identical to the analytical results.