基于协作中继的VMIMO通信信道建模研究

摘要

针对MIMO系统在移动终端实现的局限性,采用基于散射体分布几何建模法,提出了一种便于实现的基于协作中继的虚拟MIMO（VMIMO）通信信道模型。在Rican衰落的情形下,对该模型的相关统计特性进行了研究,推导出了相关函数的闭合表达式,且充分考虑了天线间隔、角度扩展、多谱勒效应、终端的移动性等信道参数,并对其进行了仿真分析,且仿真结果表明：基于协作中继技术形成的VMIMO可利用MIMO技术的优越性实现更高的性能。%For the Limitations of MIMO systems in mobile terminal, this paper has provided an easily implemented virtual MIMO (VMIMO) communication channel model based on cooperative relay technology, by using the geometric modeling method on the basis of scatterers' distribution. In Rican fading environment, the relevant statistical properties of the channel model are studied. And, the closed expressions of the correlation function are; deduced. And the parameters of this channel model such as the antenna interval, the angular spread, the Doppler effect, and the mobility of the terminal, etc. are all considered, simulated and analyzed. The simulation results show that the VMIMO based on cooperative relay technology can take advantage of the superiority of MIMO technology to achieve higher performance.