IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
LETTER
Optimal allocation of sensing duration among multiple primary channels in cognitive radio
Qi YanJiawei YangWen ZhangLi Zhang
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JOURNAL FREE ACCESS

2011 Volume 8 Issue 6 Pages 346-352

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Abstract

In cognitive radio networks, allocation of the sensing duration is of critical importance for efficient spectrum sensing. Conventional optimization of sensing duration is limited in two primary channels as well as same constant thresholds for all the primary channels. In this paper, we consider multiple primary channels and formulate the problem of sensing duration allocation as a convex optimization with respect to both the sensing durations and detection thresholds. Then, based on Penalty method and Newton's method, a searching algorithm is proposed to obtain the optimal solution. We show via simulation results that our scheme substantially improves the transmission opportunity of cognitive user compared with existing ones.

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