Diversity loss-array gain tradeoff in doubly correlated MIMO beamforming systems

Abstract

This paper presents the trade-off between the array gain and the diversity loss in doubly correlated multiple-input multiple-output (MIMO) channels. In general, the array gain increases with increasing correlation at either side of the MIMO system. However, the bit error probability performance, i.e., the diversity gain, degrades with increasing correlation at either side of the MIMO system. However, the effects of correlation on the array and the diversity gains and the associated trade-offs are not yet investigated in doubly correlated MIMO channels. The contribution of this paper is to determine the correlation regions in doubly correlated MIMO channels providing the optimum trade-off between array and diversity gains.