Joint Transmit and Receive Antenna Selection in MIMO-NOMA-Based Uplink Satellite Networks

In this article, we consider a joint transmit and receive antenna selection (JTRAS) scheme for multiple-input multiple-output (MIMO) nonorthogonal multiple access (NOMA) in uplink satellite networks. We also propose a detection scheme that exploits the advantages of antenna selection, allowing the possibility of detection without successive interference cancellation (SIC) as well as the use of SIC. The outage probability expressions for users are derived for the considered JTRAS-NOMA system, and simulation results validate the derived expressions. The asymptotic outage probability expressions and diversity gains are also obtained, and it is shown that full diversity can be achieved depending on the target rates. In addition, the considered system with the proposed detection scheme is compared with the existing SIC-based detection schemes. The JTRAS-NOMA-based system is also compared with the JTRAS-orthogonal multiple access (JTRAS-OMA)-based system, and the superiority of the NOMA-based system at low target rates is shown.