Peak to average power ratio reduction in NC–OFDM systems

Tabassum, S., Hussain, S. and Ghafoor, A. (2015) Peak to average power ratio reduction in NC–OFDM systems. Journal of Electrical Engineering, 66(3), pp. 154-158. (doi: 10.2478/jee-2015-0024)

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Non contiguous orthogonal frequency division multiplexing (NC-OFDM) is an efficient and adaptable multicarrier modulation scheme to be used in cognitive radio communications. However like OFDM, NC-OFDM also suffers from the main drawback of high peak to average power ratio (PAPR). In this paper PAPR has been reduced by employing three different trigonometric transforms. Discrete cosine transform (DCT), discrete sine transform (DST) and fractional fourier transform (FRFT) has been combined with conventional selected level mapping (SLM) technique to reduce the PAPR of both OFDM and NC-OFDM based systems. The method combines all the transforms with SLM in different ways. Transforms DCT, DST and FRFT have been applied before the SLM block or inside the SLM block before IFFT. Simulation results show the comparative analysis of all the transforms using SLM in case of both OFDM and NC-OFDM based systems.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Hussain, Dr Sajjad
Authors: Tabassum, S., Hussain, S., and Ghafoor, A.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Journal of Electrical Engineering
Publisher:Slovak University of Technology, Faculty of Electrical Engineering and Information Technology
ISSN (Online):1339-309X
Published Online:14 July 2015
Copyright Holders:Copyright © 2015 The Authors
First Published:First published in Journal of Electrical Engineering 66(3):154-158
Publisher Policy:Reproduced under a Creative Commons License

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