基于3GPP-SCM的智能天线系统信道模型仿真

Simulation of channel model of smart antenna system based on 3GPP-SCM

无线通信信道的空时频特性是决定智能天线系统性能的重要因素。基于3GPP-SCM模型,从理论上对智能天线系统的信道进行了建模,针对3种通信场景,利用数值仿真研究了其空时频相关特性,及对应的波数谱、多普勒功率谱、功率时延谱,对该模型的衰落深度进行了研究。实验结果表明,SCM信道模型能反映智能天线系统空间信道的每次实现的变化特性,且可用于链路级和系统级仿真。

The channel characteristic of wireless communication channel in spatial, temporal and frequency domain is an important factor of determining the performance of smart antenna system. Based on the 3GPP-SCM model, the wireless communication channels are modeled in this paper, then under three communication scenarios, the channel characteristics in spatial, temporal and frequency domain are studied by numerical simulations, and the corresponding wave number spec- trum, Doppler power spectrum, power-delay spectrum and also fading depth of the model are studied. The results show that, SCM channel model can reflect the characteristic of changes in spatial channel of smart antenna system for each experi- ment and can be used for link-level and system-level simulation.