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信道模型对分析智能天线系统的性能是非常重要的。针对基于(散射体)几何分布的单反射椭圆模型(GBsBEM)在计算机模拟时参数难以确定的不足,本文结合UMTS-IMT-2000推荐的信道模型,提出了一种新的空时信道模型,并给出了计算机模拟方法:以GBSBEM模型为基础,吸收UMTS-IMT-2000推荐的信道模型的时延和功率方面的参数并考虑GBSBEM模型中DOppler效应对信号幅度的影响,模拟空时Rayleigh信道。在这一方法的基础上,又提出了多用户空时信道简化模型以及模拟方法。计算机仿真结果表明,所提出的信道模型计算机模拟方法是可行的。
The channel model is very important for analyzing the performance of a smart antenna system. Aiming at the difficulty in determining parameters of GBSBEM based on (scatterers) geometric distribution in computer simulation, a new space-time channel model is proposed based on UMTS-IMT-2000 recommended channel model The method of computer simulation is given. Based on the GBSBEM model, the delay and power parameters of UMTS-IMT-2000 recommended channel model are absorbed and the effect of DOppler effect in the GBSBEM model on signal amplitude is considered to simulate the space-time Rayleigh channel. Based on this method, a simplified model of multi-user space-time channel and a simulation method are also proposed. Computer simulation results show that the proposed channel model computer simulation method is feasible.