Peak to average power ratio suppression method joint orthogonal and non-orthogonal scheme

Abstract

With the rapid development of wireless communication, the spectrum resources are increasingly scarce, and the limited utilization of spectrum resources has become a popular research, especially in the 5G mobile communication system. Some efficient frequency division multiplexing systems, such as SEFDM (Spectrally Efficient Frequency Division Multiplexing) system, can improve spectrum utilization by the further compression of the distance between sub-carriers based on OFDM carrier structure. This idea of further compression bands will largely solve the problem of scarce spectrum resources in the future. However, due to the further compression of the sub-carrier spacing, the PAPR (peak to average power ratio) is larger than that of traditional OFDM system. In this paper, a method of PAPR suppression for joint orthogonal and non orthogonal spectrally efficient frequency division multiplexing based on SEFDM in the transmitter is proposed, which can restrain the PAPR (peak-to-average ratio) of the transmission system under the condition of spectrally efficient spectrum utilization so as to improve the system performance. The simulation result shows that the PAPR of the system presented in this paper is 2 to 3 dB lower than that under the traditional scheme in a certain interval.