Cluster-based cooperative subcarrier sensing using antenna diversity-based weighted data fusion

Mughal, B., Hussain, S. and Ghafoor, A. (2016) Cluster-based cooperative subcarrier sensing using antenna diversity-based weighted data fusion. Arabian Journal for Science and Engineering, 41(9), pp. 3425-3439. (doi:10.1007/s13369-015-1973-6)

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Abstract

Cooperative spectrum sensing (CSS) is used in cognitive radio (CR) networks to improve the spectrum sensing performance in shadow fading environments. Moreover, clustering in CR networks is used to reduce reporting time and bandwidth overhead during CSS. Thus, cluster-based cooperative spectrum sensing (CBCSS) has manifested satisfactory spectrum sensing results in harsh environments under processing constraints. On the other hand, the antenna diversity of multiple input multiple output CR systems can be exploited to further improve the spectrum sensing performance. This paper presents the CBCSS performance in a CR network which is comprised of single- as well as multiple-antenna CR systems. We give theoretical analysis of CBCSS for orthogonal frequency division multiplexing signal sensing and propose a novel fusion scheme at the fusion center which takes into account the receiver antenna diversity of the CRs present in the network. We introduce the concept of weighted data fusion in which the sensing results of different CRs are weighted proportional to the number of receiving antennas they are equipped with. Thus, the receiver diversity is used to the advantage of improving spectrum sensing performance in a CR cluster. Simulation results show that the proposed scheme outperforms the conventional CBCSS scheme.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Hussain, Dr Sajjad
Authors: Mughal, B., Hussain, S., and Ghafoor, A.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Arabian Journal for Science and Engineering
Publisher:Springer
ISSN:1319-8025
ISSN (Online):2191-4281
Published Online:07 December 2015
Copyright Holders:Copyright © 2015 King Fahd University of Petroleum and Minerals
First Published:First published in Arabian Journal for Science and Engineering 41(9): 3425-3439
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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