Capacity Analysis of NOMA-based Relay Systems in Maritime Communication Networks

This paper introduces a novel approach for enhancing spectrum efficiency in maritime communication through the use of Non-Orthogonal Multiple Access Partial Decode-and-Forward (P-DF) cooperative relay networks (CRN). Two relay forwarding protocols are investigated without compromising generality. The study analyzes the average achievable rate of the system over independent Rayleigh fading channels, aiming to maximize user capacity. Asymptotic expressions for the system's performance are provided. In this context, unmanned aerial vehicle relays successfully decode received symbols from coastal terrestrial base stations (BS) and forward them to maritime users, mitigating the performance loss associated with high decoding requirements in Decode-and-Forward (DF) schemes.