Outage of NOMA-Based Hybrid Satellite-Terrestrial Multi-antenna DF Relay Networks

This letter analyzes the outage performance of a novel two-user non-orthogonal multiple access (NOMA)-based hybrid satellite-terrestrial relay network (HSTRN), in which one user can directly receive the signals from the satellite while the other user can only acquire its desired signal through a multiple-antenna decode-and-forward (DF) relay. In particular, a novel DF relaying protocol is designed to deal with the unbalanced channel condition and improve the performance for both users. Numerical results are provided to validate our analyses, unveil the impacts of key parameters on the system performance, and demonstrate the advantages of our proposed scheme over other benchmarks.