Antenna mutual coupling effect on MIMO-OFDM system in the presence of phase noise

Abstract

This work investigates the antenna mutual coupling effect on multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems with oscillator phase noises. Since the antenna correlation when taking the mutual coupling effect into account is smaller than that when the mutual coupling effect is omitted, it is shown that, at small antenna separations, the error rate performance of the MIMO-OFDM system when taking the mutual coupling effect into account can be smaller than that when the mutual coupling effect is not considered (even though the mutual coupling degrades the antenna radiation efficiencies and mismatches). It is also shown that, with sufficient subcarrier spacing, the phase noise effect can be mitigated by simple phase noise compensation regardless of the antenna correlation or mutual coupling.