Outage analysis for kth worst user in multiuser spectrum sharing relay system in Nakagami-m fading environment

In this paper, we study outage probability (OP) of the multiuser spectrum sharing relay system (SSRS) that employs a decode-and-forward (DF) relay node to enhance the system reliability. Particularly, a closed-form expression for the OP of the kth worst destination in Nakagami-m fading environment is derived which provides a generalized analytical tool for investigating system's key parameters on the OP and paves the way for more complex analysis. We verify correctness of our theoretical analysis by showing that simulation results coincide with the analytical results.