A computationally efficient selected mapping technique for reducing PAPR of OFDM

Md. Moshiur Rahman (), Md. Nur Al Safa Bhuiyan, Muhammad Sajjadur Rahim and Sabbir Ahmed
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Md. Moshiur Rahman: University of Rajshahi
Md. Nur Al Safa Bhuiyan: University of Rajshahi
Muhammad Sajjadur Rahim: University of Rajshahi
Sabbir Ahmed: University of Rajshahi

Telecommunication Systems: Modelling, Analysis, Design and Management, 2017, vol. 65, issue 4, No 6, 637-647

Abstract: Abstract In orthogonal frequency division multiplexing (OFDM) system, high value of peak-to-average power ratio (PAPR) is an operational problem that may cause non-linear distortion resulting in high bit error rate. Selected mapping (SLM) is a well known technique that shows good PAPR reduction capability but inflicts added computational overhead. In this paper, using Riemann sequence based SLM method, we applied reverse searching technique to find out low PAPR yielding phase sequences with significant reduction in computational complexity. Additionally, we explored side-information free transmission that achieves higher throughput but sacrifices PAPR reduction. Finally, to overcome this loss in PAPR reduction, we proposed application of Square-rooting companding technique over the output OFDM transmitted signal. Simulation results show that the proposed method is able to compensate the sacrifice in PAPR and achieved PAPR reduction of 8.9 dB with very low computational overhead.

Keywords: OFDM; PAPR; SLM; SQRT companding technique; Riemann matrix; Computational overhead (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1007/s11235-016-0257-0

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