基于AR模型的平坦衰落信道仿真

Autoregressive Modeling for Flat Fading Channel Simulation

无线信道大多处于复杂的传播环境中,研究复杂环境下的信道仿真是进一步研究空时信号处理技术的基础。本文实现了复杂传播环境下平坦衰落信道的AR模型仿真。在研究接收信号(含直射和方向性散射)复包络二阶统计特性的基础上,采用AR模型对信道进行仿真。仿真结果表明:基于AR模型的平坦衰落信道的仿真结果与理论曲线匹配度高,而且AR模型求解简便,适用于复杂环境下的信道。

The research of fading channel simulation in complex communication environment is of vital importance to the study of space-time signal processing technologies, in this paper, an autoregressive （AR） model is presented for the simulation of flat fading channel in complex communication environments. It explores the second order statistics of fading envelopes influenced by nonisotropic scattering environments with light-of-sight （LOS）, and uses an AR model for channel simulation. The simulation results show that it is a highly accurate approach with comparatively small computing amount. Besides, the general applicability of the method is demonstrated by examples involving the accurate synthesis of fading channel models in complex communication environments.