MIMO Wireless Statistics Channel Modeling And Simulation Ananlysis

Wireless communication system usually has channel multipath effect. MIMO system technology makes use of this shortcoming and improves the channel capacity of the system without any increasing spectrum bandwidth and transmission power. With the MIMO technology more and more applied in all kinds of advanced technologies, MIMO has become one of hot topics in the study of the current technology. Wireless fading channel and the antenna array of the transmiting and receiving determine the performance of MIMO system. This paper centers on analysis of geometrical-based wireless statistic channel and research the correlation and capacity of MIMO system. The paper mainly has the following four parts:Firstly, in this section the paper in detail introduced the large-scale fading and small scale fading in wireless fading channel. In addition, several common large scale fading model and small scale fading model were proposed. In the MIMO channel model, emphatically introduces some classic geometric channel model:Lee mobile, discrete uniform distribution model, geometrically based single bounce circular model and geometrically based single bounce elliptical modelSecondly, a based on different asymmetric geometry of scatterer distribution channel model was proposed, which adopted uniform distribution and Gaussian distribution and Exponential distribution model. In the uniform distribution model, how the angle of the main lobe and the directional antenna effect TOA probability density distribution curve was given. In the Gaussian distribution and Exponential distribution model, with geometric mathematical method the AOA/TOA, AOA and TOA of probability density function were proposed. Due to the Doppler Effect, the doppler power spectrum of the mobile station was given. In MIMO systems four units of ULA and UCA antenna structure was set up, simulation results show that the UCA compared with the ULA has obvious advantages.Thirdly, this paper proposed a based on the hollow three-dimensional multi-input multi-output (MIMO) channel model and analyzed the parameters and the channel capacity of MIMO channel. In the vertical plane and in the horizontal plane, AOA probability density distributions of BS and MS were devided. The doppler frequency shift was also devided. The simulation results show that the 3D model of MIMO proposed in this paper has very strong plasticity and is suitable for a variety of communication environment.Lastly, a 3D MIMIO model based on VMF distribution of scatterers was proposed. Compared with the typical antenna topology structure, the UYA antenna array was established. The MIMO spatial fading correlation expression was devided and the channel capacity was analyzed. The simulation results show that the concentration parameter and the mean elevation of arrival mainly affect the performance of the MIMO channel capacity. In addition, UYA antenna array than the UCA antenna array has obvious advantage and effectively improve the capacity of MIMO channel.