OP Analysis of Alamouti/MRC NOMA System with SDR-Based Real-Time Implementation

Motivated by the great potential of multi-antenna, multi-user non-orthogonal multiple access (NOMA) systems for 5G+, this paper presents an outage probability (OP) analysis of a down-link multi-user NOMA network with Alamoutilmaximum ratio combining (AlamoutiIMRC) antenna diversity. Herein, a base station using Alamouti coding simultaneously serves mul-tiple users with MRC. We derive the exact and asymptotic OP expressions for users over the Rayleigh fading channel. In addition, we also constitute a software-defined radio-based three-users 2x2 AlamoutiIMRC test-bed to investigate the feasibility of the considered network in a real-time manner. Finally, the analytical expressions are verified through the test-bed results and the Monte Carlo simulations.