A mathematical analysis of the PAPR in the NOMA waveform using SLM algorithm for 64-QAM

Kumar, Arun; Yamini, Anish Pon; Gaur, Nishant; Nanthaamornphong, Aziz

doi:10.47974/JIM-1815

Open Access Research Article

A mathematical analysis of the PAPR in the NOMA waveform using SLM algorithm for 64-QAM

Arun Kumardr.arunk.nhce@newhorizonindia.eduDepartment of Electronics and Communication Engineering New Horizon College of EngineeringBengaluru, Karnataka, 560103, IndiaView full profile → , Anish Pon Yaminidranishponyaminik@veltech.edu.inDepartment of Electronics and Communication Engineering Vel Tech Rangarajan Dr Sagunthala R & D Institute of Science and Technology Tamil Nadu, IndiaView full profile → , Nishant Gaurnishant.gaur@jecrcu.edu.inDepartment of Physics JECRC University, JaipurDepartment of Physics JECRC UniversityJaipur, Rajasthan, 110086, IndiaView full profile → , ^*Aziz NanthaamornphongCorresponding authoraziz.n@phuket.psu.ac.thCollege of Computing Prince of Songkla UniversityPhuket, ThailandView full profile →

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pp. 223–232Vol. 27Issue 2March 2024DOI: 10.47974/JIM-1815XML

Published Online:: 19 Mar 2024
Article type:: Research Article
Language:: EN
Article no.:: JIM-1815
Pages:: 223–232

Abstract

In Non-Orthogonal Multiple Access (NOMA) technology, a paradigm shift in wireless communication is observed, as it allows numerous users to simultaneously transmit data over the same spectral resources in a non-orthogonal manner. Despite the advancements it brings to the table, NOMA is faced with a notable technical obstacle, that being the elevated Peak-to-Average Power Ratio (PAPR). Elevated PAPR levels can lead to less efficient use of power and a deterioration in the fidelity of the signal. We proposed a Selective Mapping (SLM) as a powerful solution to address this issue. SLM is a PAPR reduction technique that applies controlled phase rotations to the symbols of different users before transmission, aiming to minimize the PAPR of the combined signal. In the context of NOMA, the application of SLM offers several notable advantages. SLM modifies the Power Spectrum Density (PSD), leading to a more uniform and spectrally efficient power distribution over the frequency spectrum. This enhancement in spectral efficiency concurrently lowers the risk of disrupting nearby frequency channels. Moreover, SLM exerts a favorable influence on the Bit Error Rate (BER) in NOMA systems, which contributes to improved transmission accuracy. Utilizing SLM to achieve lower PAPR values significantly diminishes the probability of symbol errors, thus enhancing the dependability. Additionally, it has been observed that the method in question delivers an improvement in PAPR, BER, and PSD with gains of 2.2 dB, 4 dB, and -620 respectively, in comparison to traditional SLM techniques.

Keywords

5G NOMA PAPR SLM

Subject Classifications

94A05

References

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