Capacity and Outage Probability Analysis of Faster-Than-Nyquist Cooperative NOMA

This letter proposes a novel cooperative non-orthogonal multiple access (C-NOMA) based on precoded faster-than-Nyquist (FTN) signaling. The additional gain in degrees of freedom obtained from precoded FTN signaling is exploited in the context of relaying-induced diversity inherent to C-NOMA. We derive the achievable ergodic rate of the proposed scheme while also deriving a closed-form expression of the proposed scheme’s outage probability, which shows improved fairness to a far user. Our simulation results substantiate the advantages of the proposed scheme over conventional benchmark methods.