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Ordered Sequential-Superposition Cooperative Spectrum Sensing for Cognitive Radio Networks

Authors:
Hiep Vu-Van
Insoo Koo

Keywords: cognitive radio; ordered sequential cooperative spectrum sensing; superposition cooperative spectrum sensing.

Abstract:
Cognitive radio (CR) is a promising technology for improving usage of frequency band. In CR network, cognitive radio users (CUs) are allowed to use the bands without interference to operation of licensed users. Reliable sensing information about status of primary user (PU), who is assigned a licensed band, is a pre-requirement for CR network. Cooperative spectrum sensing (CSS) is able to offer an improved sensing reliability compared to individual sensing. However, when the number of CUs is large, the latency and network traffic for reporting sensing results to the Fusion Center (FC) become extremely large, which may result in an extended sensing time and collision in the control channel between Cognitive Users (CUs) and the FC. In this paper, we propose an ordered Sequential-Superposition Cooperative Spectrum Sensing (SSCSS) scheme for faster and more reliable spectrum sensing of CR network. Superposition CSS technique extends sensing time to the reporting slots of other CUs until their round of reporting. The proposed scheme estimates the required number of CUs needed to sense for satisfying the reliability requirement of the system. Furthermore, the scheme decides which CUs (and their orders of polling) will be chosen for the sensing process to maximize performance of the proposed scheme. The simulation results of the proposed scheme show the outstanding performance of the proposed scheme compared with the other conventional CSS.

Pages: 150 to 154

Copyright: Copyright (c) IARIA, 2014

Publication date: July 20, 2014

Published in: conference

ISSN: 2308-4030

ISBN: 978-1-61208-360-5

Location: Paris, France

Dates: from July 20, 2014 to July 24, 2014