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)

Abstract

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
• Status: Published
• Refereed: Yes
• 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: 1339-309X
• 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