基于Nakagami衰落的宽带MIMO信道模型的研究与仿真

Study and simulation of the wideband MIMO channel model over Nakagami fading

Nakagami分布是比Rayleigh,Rice以及对数正态分布都更加符合实际的衰落信道模型.通过对MI-MO无线通信系统信道模型的研究,提出了1种新的Nakagami衰落信道的仿真方法,并用该方法建模宽带MI-MO信道.在信道服从Nakagami衰落的情况下通过不同的衰落指数m对MIMO信道的容量、电平通过率、平均衰落持续时间等性能进行仿真和分析,从而得到了衰落指数m和宽带MIMO无线通信系统性能的关系,同时本文的仿真研究表明Nakagami模型适用于对MIMO信道不同衰落环境下的描述.

Nakagami distribution is a more realistic fading channel modscribe the radio environment than Rayleigh, Rice and Lognormal distribution. A new simulation method which is used to simulate the Nakagami fading channel and to modeling the wideband MIMO channel is introduced. Then, simulations over different fading figure m are proposed which including the capacity, level crossing rate and average fade duration. Next, the relationship between the fading figure m and the performances of wideband MIMO wireless system is given based on the simulation results. Meanwhile,it proved that the Nakagami model is applicable to fit the MIMO channels under different fading environment.