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In this paper, the performance of wireless communication systems with antenna arrays and multiple interferers in correlated Nakagami fading channels is investigated. Closed-form expressions of the probability density function (PDF) of signal-to-noise-plus-interference ratio (SNIR), taking account of fading correlations and mutual coupling, are derived and both maximal ratio combining (MRC) and optimal combining (OC) are considered in the derivation. The expressions for the outage probabilities are then derived. Since fading correlations and mutual coupling are closely related to array geometry, performance for both linear and circular arrays are analyzed and numerical results are shown to illustrate the effects of array geometry, angular spread, fading, and so on.