Besides traditional orthogonal multiple access (OMA), 5G and other future wireless communication systems will also involve non-orthogonal multiple access (NOMA). In that context, the combination of NOMA systems with the popular orthogonal frequency-division multiplexing (OFDM) will arise naturally in highly spectral efficient communications. Since OFDM signals are very prone to nonlinear distortion effects, the receiver design of NOMA-OFDM systems should be modified accordingly. In this work, we consider an efficient, nonlinear power amplification for NOMA-OFDM systems and we propose different reception strategies to cope with the nonlinear distortion. It is shown that the performance of conventional power-domain NOMA is very poor under nonlinear transmission scenarios. However, it is also demonstrated that Bussgang receivers combined with optimum detection schemes might be an excellent alternative1.
On the Receiver Design for Nonlinear NOMA-OFDM Systems
2020-05-01
327381 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch