Abstract
We propose an uplink full-duplex (FD) cooperative non-orthogonal multiple access (NOMA) system, where a dedicated Full-duplex (FD) relay is used to help two uplink users transmitting information to the base station. A novel FD relay transmission mode is proposed, in which the FD relay utilizes successive interference cancellation (SIC) and self-interference cancellation to decode two users symbols at the relay receiving antenna, and the relay transmitting antenna transmits superimposed signal to the base station using superposition coding. In this paper, we also consider a more realistic scenario where self-interference cancellation is imperfect. Hence, the residual-self interference exists. Moreover, the ergodic sum rate and the outage probability of the proposed system are investigated and the accurate analytical expressions are derived. Simulation results validate that, compared with the uplink half-duplex (HD) cooperative NOMA system and the uplink HD cooperative orthogonal multiple access (OMA) system, our proposed system obtains better performance of the ergodic sum rate and outage probability in the main signal to noise ratio (SNR) regime.
Highlights
As a promising solution to obtain higher data rate and reliability, the non-orthogonal multiple access (NOMA) has fascinated enormous attention in both industry and academia [1]
SIMULATION RESULTS the ergodic sum rate and the outage probability of our proposed uplink FD cooperative NOMA system and the compared systems are evaluated by Monte-Carlo simulations based on 100,000 independent channel realizations
We find that it is important to consider the influence of the residual self-interference when designing the practical uplink FD cooperative NOMA system
Summary
As a promising solution to obtain higher data rate and reliability, the non-orthogonal multiple access (NOMA) has fascinated enormous attention in both industry and academia [1]. The proposed system achieves better performance of outage probability and average sum rate compared to the uplink conventional orthogonal multiple access and uplink NOMA with half-duplex relaying system. The aforementioned works on uplink cooperative NOMA schemes usually assume that there are direct links between the base station and the uplink users. We propose an uplink FD cooperative NOMA system, where a dedicated FD relay is used to help two uplink users transmitting information to the base station. A novel FD relay transmission mode is proposed, in which the FD relay utilizes successive interference cancellation and self-interference cancellation to decode two users symbols at the relay receiving antenna and the relay transmitting antenna transmits superimposed signal to the base station using superposition coding technology. PERFORMANCE ANALYSIS we give the detailed analysis to the ergodic sum rate and the outage performance of our proposed system
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