Modeling And Performance Analysis Of MIMO Channel Based On Wireless Geometry Stochastic Characteristics

The Multiple-input Multiple-output (MIMO) technology has been widely consideredto be one of the most promising techniques in mobile radio communications, furthermore,MIMO enables the great improvement of spatial multiplexing, spatial diversity andimprove the channel capacity. With the employment of MIMO technology, the demand forstandardized MIMO channel model is more urgent. Accordingly, the standardized4G thechannel models are essential，which can be used for accurately describing reasonablecomputational complexity and the critical parameters of the radio environment.This article compare the two4G MIMO standardized channel: theIMT-A(IMT-Advanced) channel and LTE-A (LTE-Advanced) channel, Comparativeanalysis of the two channels are performance indicators: space mutual correlation functionof time from the correlation function, the amplitude of the envelope crossing rate and theaverage fading sustained time. The standardized4G MIMO channel models can roughlybe classified into two types: IMT-A channel model which is geometry-based stochasticmodels (GBSM), and LTE-A channel model which is correlation-based stochastic models(CBSMs). Accuracy and complexity are the two most important indexes for channelmodelling. Firstly, this thesis compares the statistical properties of two types ofstandardized4G MIMO channel models, i.e.3GPP LTE-A and IMT-Advanced channelmodels. The following parameters are considered for comparison: spatial temporalcorrelation properties, level-crossing rate (LCR), and average fading duration (AFD) ofboth models.Secondly, we try to simplify the IMT-A channel model for easy engineeringapplication. IMT-A channel model has a high accuracy and flexibility, but it needsconsiderable computation to produce these random variables, therefore, we try to fix someparameters and remove the correlation.etc to reduce complexity in the premise ofaccuracy.Furthermore, this thesis investigates SINR modelling and analysze the downlinkMIMO communication system based on the simplified GBSM channel. Considering thepath loss, shadow fading and multipath effects in wireless channel, we use alpha stable distribution and circularly symmetric (CS) complex Gaussian distribution to for aggregateinterference analysis and modelling in multi-cell multi-antenna cellular network downlink,then derive interference characteristic function and the probability density function in aclosed form. Numerical analysis and simulations are carried out at last.