Outage performance of OFDM-based selective amplify-and-forward cooperative networks over Nakagami-m fading channels

In this paper, the outage performance is investigated for orthogonal frequency division multiplexing (OFDM)-based selective amplify-and-forward cooperative networks over independent but not identically distributed (i.n.i.d.) Nakagami-m fading channels, with integer values of parameter m. A unified closed-form expression for the outage probability is derived for three selective relaying schemes. The effect of the coherence bandwidth on these schemes is also investigated. Monte Carlo simulations are carried out to validate our analysis.