SER Performance of Compact MIMO Systems with Receive Matching Networks in Nakagami-m Fading Channel

Abstract

Compact MIMO (multiple-input multiple-output) systems will inevitably introduce the element mutual coupling, which unfortunately decreases the whole system’s performance. Different receive S-parameter matching networks were already designed to combat this adverse effect, and interestingly, the related performance evaluation indexes of these work are mainly subject to channel capacity and signal correlation. In this paper, the symbol error rate (SER) of the compact MIMO systems with various S-parameter matching networks are studied in a Nakagami-m fading environment, including detailed derivation of the closed-form SER formula based on moment generating function (MGF) method and its corresponding numerical simulations. The results show that the SERs of the compact MIMO systems with common matching networks are greatly reduced especially under the optimum matching in the small antenna spacing case.