关键词: 信道模型, 瑞利衰落信道, 自回归模型, Clarke模型

Abstract: AutoRegression (AR) model and Clarke model (CLARKE R H. A statistical theory of mobile-radio reception. Bell System Technology Journal, 1968, 47(6): 957-1000) are typically used for the simulation of Rayleigh fading channels. But the results show that AR model has unavoidable numerical difficulties, hence it cannot generate the desired correlations of Rayleigh fading channels. Based on the Clarke model, an improved Sum-Of-Sinusoids (SOS) model was proposed, which reduced the distribution of the angel of arrivals and ensured its random distribution. Therefore, the new model could achieve better statistical properties of generated channels. Judging the variance of the time average statistical properties from their ideal ensemble averages, the new model has better performance and its statistical convergence to the desired correlations is faster than Clarke model.

Key words: channel model, Rayleigh fading channel, AutoRegressive (AR) model, Clarke model