Relay Selection for CoMP-NOMA Transmission In Satellite and DAY Cooperative Networks

This work considers a new wireless network architecture in which satellite (SAT) communicates with ground users via DAVs as aerial decode-and-forward (DF) relays. Uavs employ non orthogonal multiple access (NOMA) coordinated multi-point (CoMP) transmission to serve users assuming they experiencing the low signal to noise ratio (SNR) or the signal-to-interference plus noise ratio (SINR). In order to maximize the received sum-rate in terrestrial users, we employ a relay selection scheme. The problem of relay selection has been investigated in both optimal and semi-optimal conditions. The performance of our proposed method is validated through outage probability (OP) and sum-rate evaluation. Simulation results show the superiority of CoMP transmission state in both mentioned conditions compared with the non-CoMP situation.