Asymptotic BEP and SEP of MRC in Correlated Ricean Fading and Non-Gaussian Noise

In this paper, we study the asymptotic behavior of the bit-error probability (BEP) and symbol-error probability (SEP) of coherent maximum-ratio combining (MRC) in correlated Ricean fading and non-Gaussian noise, which in our definition also includes interference. We derive simple and easy- to-evaluate asymptotic BEP and SEP expressions which show that at high signal-to-noise ratios (SNRs) the performance of MRC depends on certain moments of the noise and interference impairing the transmission. We provide closed-form expressions for these moments for practically important types of noise such as Gaussian mixture noise, correlated co-channel interference, and correlated Gaussian interference. Interestingly, our results show that not only fading correlation but also noise correlation has an adverse effect on the asymptotic BEP and SEP.