Low Complexity Detection Algorithm for Low PAPR Interleaving Based NOMA Schemes

In this paper, a low PAPR interleaving based non-orthogonal multiple access (NoMA) scheme is introduced. By utilizing the property of DFT spread OFDM (DFT-s-OFDM), the peak-to-average power ratio (PAPR) can be reduced compared with existing NoMA schemes without sacrificing achievable data rates. Meanwhile, a low-complexity detection algorithm is also proposed on top of the elementary signal estimator (ESE) with the joint Gaussian distribution assumption, which can maintain good detection performance with moderate detection complexity. Simulation results, including PAPR and BLER performance, show that the proposed scheme can provide good performance with lower PAPR, which is suitable for mMTC scenario for 5G.