The Largest Eigenvalue Characteristics for MIMO Channel with Spatial Correlation

摘要

In this paper, a typical mobile communication environment is assumed and the eigenvalue distributions of the correlation matrix of a MIMO channel with the spatial correlation of the multipath taken into account are studied by simulation. Based on this study, a simple method is proposed for accurately deriving the probability distribution of the largest eigenvalue of the correlation matrix. The proposed approximation equation is compared with simulation results and good agreement is obtained. In order to understand the information transmission capability of MIMO in a multipath fading environment with spatial correlation, the proposed equation is used for studying the effect of the spatial correlation on channel capacity. Finally, the digital transmission characteristics (relationship between the BER and the CNR) with correlation taken into account are obtained.