Performance analysis of regenerative multi-receive-antenna fixed relay networks over Nakagami-m channels

In this paper, we investigate a cooperative system, where the communication between the single-antenna source and destination node is assisted by two multi-receive-antenna fixed relays over flat, slow, Nakagami-m fading environments with integer m. Specially, it is assumed that there is a link between two relays while the direct link (between the source and destination) is blocked. The exact closed-form expression of the end-to-end symbol error rate is derived and validated through various simulation results. It is numerically demonstrated that the system achieves the best performance when one relay locates near the central point of the link between the source and destination while the other locates near the destination. Furthermore, as increasing the number of relay antennas, the system performance becomes better when the relays move towards the destination. For the same relay positions, increasing the fading index m will improve the system performance.