PAPR Reduction in Carrier Aggregation-NOMA System Using Sørensen– Dice Coefficient

Fast Fourier transform based non-orthogonal multiple access (FFT-NOMA) has been proposed as a novel scheme to increase the traffic demands in the wireless systems. However, it causes high peak to average power ratio (PAPR) because of the superposition of multiple users on the same frequency subchannel. In this paper carrier aggregation technique is added to the FFT-NOMA system and a novel PAPR reduction scheme to reduce the high PAPR is proposed. The Proposed scheme is based on cascading the partial transmit sequence (PTS) with Sorencen-Dice coefficient (SDC). The simulation result shows ۴.۵ dB superiority compared with the FFT-NOMA scheme.

کلیدواژه ها:

PAPR ، ۵G ، NOMA ، Carrier aggregation ، similarity ، Sørensen–Dice Coefficient.