MIMO理论的改进方案研究

Study on the Improving Scheme of MIMO Theory

指出现有M IMO理论研究只是在所建立的基带数学模型基础上,依据空分复用(SDM)原理证明了M IMO可增加信道容量。但是它没有给出与该数学模型相适配的、合理的物理模型,导致所依据的SDM无法实现,使M I-MO理论在数学层面所导出的信道容量公式在物理上是无法实现的。从天线的物理特性、各种天线阵的波束图、M IMO物理模型的不合理性、M IMO独立随机信道和SDM的不可实现性等诸多方面证明了M IMO理论的不可用性。并提出在Shannon公式应用原理和相控天线阵理论基础上构建的、用于取代M IMO系统的SHPCA系统,将利用SDM和Shannon公式应用方法给出获取该系统信道容量增益的原理、理论研究方法和模拟结果。

It is pointed out that the current MIMO theory bases its study solely on the established mathematical model,and using the space division multiplex（SDM） principle to provet the increase of channel capacity（CC）.Unfortunately there is no reasonable physical model matching to that mathematical model,leading to the fact that the SDM cannot be realized in MIMO system.It implies that the CC formula of MIMO system deduced by the mathematical model cannot be realized physically.The infeasibility of MIMO theory is proved from multiple facets including the physical characteristics of antenna,radio beam patterns of many kinds of antenna array,the unreasonability of the MIMO physical model,infeasibilities of MIMO independent random channels and SDM.Based on the Shannon formula and the principle of phase-controlled antenna array,an SHPCA system is proposed to substitute the MIMO system.The principle and research method to obtain the gain of CC are given using the SDM and the application methods of Shannon formula.Simulation results are also provided.