Cluster-Based Double Bounce MIMO Channel Model and Capacity Analysis

Abstract

The spatial and temporal correlation is investigated at both transmitter and receiver. A cluster-based double bounce MIMO channel model is presented. The model can be used for nonselective Rice fading MIMO channels, and the expressions for correlation coefficient and channel capacity are derived. The correlation coefficient is the function of antennas spacing, angular spread, power angular spectrum, mean angle-of-arrival, Doppler spread and delay spread. In space domain, the capacity increases with antenna spacing and angular spread. For multiple clusters incidence wave, the correlation coefficient and capacity will oscillate with increasing antenna spacing. The capacity will decrease with increasing Rician factor. In time domain, the capacity gets higher with increasing Doppler and delay spread. When the frame length is larger than coherent time, the capacity will get to the independent capacity asymptotically. Two typical scenarios are simulated for indoor and outdoor environments.