Reducing PAPR with Low Complexity Filtered NOMA Using Novel Algorithm

Abstract

Filtered Non-Orthogonal Multiple Access (F-NOMA) is a multi-carrier wave form and is considered a suitable contender for 5G radio. Peak to average power ratio (PAPR) is regarded as a major hurdle in the NOMA wave form because it hampers the efficiency of the power amplifier of the NOMA transmitter. In this study, a novel selective mapping (SLM) algorithm is used to minimize the PAPR of the NOMA. The conventional SLM increases the intricacy of the structure, and the projected SLM algorithm is applied to the transmitter part of the F-NOMA. Furthermore, we evaluate the performance of SLM on F-NOMA for 16, 64, and 256-Quadrature Amplitude Modulation (QAM) transmission methods. The parameters such as Bit Error Rate (BER), PAPR, power spectral density (PSD), and complexity are estimated and compared with different transmission patterns. The simulation outcomes of the work reveal that the optimal PAPR can be achieved by selecting the sub-block (S) and phase rotation elements (Ps). PAPR in F-NOMA achieves 1 dB gain in different QAM transmissions and its saving performance is 70.07%; however, complexity increases with an increase in modulation order.

JAYA algorithm based selective mapping for PAPR reduction in GFDM systems

“…The power saving is related to the signal PAPR value, this measurement is important for the system transmission, the lower the PAPR value the higher power saving for the amplifier used, the power saving is defined as 49,50 :…”

PAPR reduction using SLM-PTS-CT hybrid PAPR method for optical NOMA waveform

“…A unique SLM method is employed in Ref. [ 28 ] to reduce the PAPR of the NOMA. The projected SLM method is used for the transmitter portion of the F-NOMA, while the conventional SLM enhances the complexity of the structure.…”

A hybrid technique for the PAPR reduction of NOMA waveform

“…It is observed that the hybrid algorithm efficiently enhances the BER and PAPR performance with low computational intricacy. In reference, 16 the authors applied a novel SLM method to the filtering NOMA for different transmission schemes. It is seen that the proposed SLM efficiently obtains a gain of 1 dB and enhances the power performance of the amplifier.…”