Influence and modelling of mutual coupling in MIMO and diversity systems

Abstract

MIMO (multiple input multiple output) and diversity systems can increase distinctly the system performance of future wireless communication systems. The correlation of signals, depending on the power azimuth spectrum, between single transmit and receive antennas is a criterion to asses smart antenna systems. The assumption of independent antennas often made is not vindicated any more for small antenna spacing, since mutual coupling between single antenna elements occurs. This paper discusses the influence of mutual coupling on the correlation and shows the consequences for MIMO systems.