Title: A new method for minimising PAPR in LFDMA systems

Authors: Lekshmi R. Nair; Sakuntala S. Pillai; G. Shiny

Addresses: Department of Electrical and Electronics Engineering, Sree Narayana Institute of Technology, Adoor, Kerala, 691554, India ' Mar Baselios College of Engineering and Technology, Thiruvananthapuram, Kerala, 695015, India ' Government Engineering College, Barton Hill, Thiruvananthapuram, Kerala, 695035, India

Abstract: Single carrier frequency division multiple access (SC-FDMA) is a standardised technology for high data rate uplink communications in prospective cellular networks that can meet the increasing needs of users. When compared to orthogonal frequency division multiple access (OFDMA), SC-FDMA strategically blends the low peak to average power ratio (PAPR) of single-carrier systems, which demonstrates higher performance for a high data rate, with bit error rate (BER). This proposed model examines the impact of subcarrier mapping on PAPR using the selected mapping approach for localised single carrier frequency division multiple access (LFDMA), a sort of SCFDMA uplink system. The primary objective of this paper is to attain reduced PAPR and better BER performance by using an efficient modified Chaotic Whale Optimisation Algorithm (MCWOA). The suggested method improves PAPR by 5 dB using QPSK and by 4.3 dB utilising 16-QAM and 64QAM modulation techniques, respectively.

Keywords: BER; bit error rate; CWOA; Chaotic Whale Optimisation Algorithm; LFDMA; localised single carrier frequency division multiple access; PAPR; peak to average power ratio; SC-FDMA; single carrier frequency division multiple access; SLM; selected mapping.

DOI: 10.1504/IJSSE.2026.153652

International Journal of System of Systems Engineering, 2026 Vol.16 No.2, pp.219 - 238

Received: 30 Dec 2023
Accepted: 01 Feb 2024
Published online: 21 May 2026 *

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