IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
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A flexible cooperative spectrum sensing scheme for cognitive radio networks
Hongxing XiaGuoping ZhangHongbo Xu
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JOURNAL FREE ACCESS

2011 Volume 8 Issue 8 Pages 542-548

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Abstract

In this paper, we propose a three-threshold decision based cooperative spectrum sensing algorithm (TTDCSS) with two rounds cooperation. Specifically, after the failure of the first cooperation, cognitive users begin to report the second local decision bit to the fusion center (FC) to perform a second cooperation, thus sensing failure is eliminated. Furthermore, by integrating uncertainty of noise variance, we propose a simple method to set local decision thresholds. Numerical results show that the TTDCSS algorithm is superior to the conventional double-threshold decision based sensing methods in the performance with a little increase of sensing bits.

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© 2011 by The Institute of Electronics, Information and Communication Engineers
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