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Title of Journal: Wireless Pers Commun

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Abbravation: Wireless Personal Communications

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Springer US

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10.1016/0167-7799(93)90110-u

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1572-834X

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Cooperative Cognitive Radio Networks New Approach

Authors: Sattar Hussain Xavier Fernando
Publish Date: 2012/11/03
Volume: 71, Issue: 3, Pages: 1755-1775
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Abstract

The quality of the reporting channel and the relaying mechanism play a significant role in cooperative spectrum sensing CSS However these factors are frequently overlooked when it comes to discussing the performance of CSS in cognitive radio CR networks In this work we investigate the performance of a relaybased CSS approach proposed for CR applications Specifically we analyze the detection accuracy of a CR network considering channel impairments amplifyandforward relying protocol and a selection combining scheme First a closed form expression for the average false alarm probability is derived Then the probability density function PDF of the endtoend signaltonoise ratio SNR is obtained and a closedform expression for the average detection probability at high SNR applications is derived The sensing and the reporting channels are assumed to be subjected to independent and identically distributed Rayleigh fading The PDF approach is used in our analysis This approach is not easily tractable as it involves higher orders of Bessel functions However an approximated polynomial representation of a firstorder modified Bessel function of the second kind makes this task possible The results obtained validate the derived closed form expressions and show the importance of considering reporting channel statistics and relaying mechanism for accurate performance analysis of the CSS in CR networks

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