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PAPR reduction using OQAM for spectrum sensing

Renuka N. (ANU College of Engineering and Technology, Acharya Nagarjuna University, Guntur, India)
Satya Sairam M. (ANU College of Engineering and Technology, Acharya Nagarjuna University, Guntur, India)

International Journal of Pervasive Computing and Communications

ISSN: 1742-7371

Article publication date: 3 December 2020

Issue publication date: 21 July 2021

47

Abstract

Purpose

The tremendous growth of wireless applications and the demand for high data rate, the spectrum utilization improvement has been the most crucial challenges for wireless communication. Adapting cognitive radio with orthogonal frequency division multiplexing or offset quadrature amplitude modulation (OFDM/OQAM) improves the spectrum and energy efficiencies.

Design/methodology/approach

Thus, it overcomes the spectral leakage problem at the transmitter side and leads to less interference from secondary user (SUs) to primary user (PUs) and between the SUs in cognitive radio technology. The benefit of exploiting pulse shape filtering in the OFDM/OQAM is to not only eliminate the requirement of the guard bands but also reduce the out of band energy transmission, which also improves the spectral isolation from the neighboring systems. But the high peak to average power ratio (PAPR) phenomenon is a common issue in the majority of the multicarrier modulation systems and thus OFDM/OQAM is no exception in this case.

Findings

Therefore, this paper aims to examine the effect of integrating the Walsh–Hadamard Transform (WHT) on the power spectral density and investigates the problem of PAPR in the WHT/OQAM system.

Originality/value

Thus, it overcomes the spectral leakage problem at the transmitter side and leads to less interference from SUs to PUs and between the SUs in cognitive radio technology. The benefit of exploiting pulse shape filtering in the OFDM/OQAM is to not only eliminate the requirement of the guard bands but also reduce the out of band energy transmission, which also improves the spectral isolation from the neighboring systems. But the high PAPR phenomenon is a common issue in the majority of the multicarrier modulation systems thus OFDM/OQAM is no exception in this case.

Keywords

Citation

N., R. and M., S.S. (2021), "PAPR reduction using OQAM for spectrum sensing", International Journal of Pervasive Computing and Communications, Vol. 17 No. 3, pp. 301-314. https://doi.org/10.1108/IJPCC-08-2020-0106

Publisher

:

Emerald Publishing Limited

Copyright © 2020, Emerald Publishing Limited

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