Performance of Cooperative Spectrum Sensing Over Fading Channels With Low SNR

WANG Qian; YUE Dianwu; LAU Francis

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Performance of Cooperative Spectrum Sensing Over Fading Channels With Low SNR

WANG Qian 1,YUE Dianwu 1 *,LAU Francis 2

1.College of Information Science and Technology, Dalian Maritime University

2.Department of Electronic and Information Engineering, The Hong Kong Polytechnic University

*Correspondence author

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Funding: Research Fund for the Doctoral Program of Higher Education of China Ministry of Education under （No.Grant 20092125110006）

Opened online:28 April 2011

Accepted by: none

Citation: WANG Qian,YUE Dianwu,LAU Francis.Performance of Cooperative Spectrum Sensing Over Fading Channels With Low SNR[OL]. [28 April 2011] http://en.paper.edu.cn/en_releasepaper/content/4423316

In this paper, we investigate the performance of cooperative spectrum sensing over fading channels. We derive the upper-and lower-bounds of the overall false alarm probability and overall detection probability as a function of the bit error probabilities of the cognitive radio-fusion center (CR-FC) links. Given an overall false alarm probability or overall detection probability, we derive the relationships of error probabilities of the CR-FC links that should be satisfied. We also investigate the relationship between the overall detection probability and the overall false alarm probability when the SNR of the primary user signal at each CR node is small.

Keywords:Wireless communications; cognitive radio; cooperative spectrum sensing; energy detection; fading channel

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