Analysis of capacity and coverage region for Rayleigh fading MIMO relay channel

Abstract

In this paper, we consider Rayleigh fading MIMO relay channel with channel state information at the<br><br>receivers. First, we extend the previously obtained results for the ergodic capacity of uncorrelated and semi-correlated MIMO channels and derive closed-form expressions for the capacity bounds of MIMO relay<br><br>channel. Next, we study this channel from a new point of view, maximizing coverage region for a desired<br><br>transmission rate, and investigate the optimal relay location in the sense of maximizing coverage region.<br><br>However, in order to overcome the mathematical complexity in desired transmission rate analysis, because<br><br>of the randomness of the multiple antenna channel matrices, we evaluate this rate by using an existing<br><br>exact formula and also by an approximation we find in the high signal-to-noise ratio regime. Numerical<br><br>results show a perfect match between the Monte Carlo simulations and the obtained analytical closed-form expressions and also confirm the effectiveness of our approach in cooperative vehicular communication for determining optimal relay location at which the coverage region is maximum. Copyright © 2013 John Wiley & Sons, Ltd.