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http://dx.doi.org/10.3837/tiis.2013.02.001

Optimal Cooperation and Transmission in Cooperative Spectrum Sensing for Cognitive Radio  

Zhang, Xian (Institute of Communications Engineering, PLA University of Science and Technology)
Wu, Qihui (Institute of Communications Engineering, PLA University of Science and Technology)
Li, Xiaoqiang (Institute of Communications Engineering, PLA University of Science and Technology)
Yun, Zi (PLA Unit of 94860)
Publication Information
KSII Transactions on Internet and Information Systems (TIIS) / v.7, no.2, 2013 , pp. 184-201 More about this Journal
Abstract
In this paper, we study the problem of designing the power and number of cooperative node (CN) in the cooperation phase to maximize the average throughput for secondary user (SU), under the constraint of the total cooperation and transmission power. We first investigate the scheme of cooperative spectrum sensing without a separated control channel. Then, we prove that there indeed exist an optimal CN power when the number of CNs is fixed and an optimal CN number when CN power is fixed. The case without the constraints of the power and number of CN is also studied. Finally, numerical results demonstrate the characteristics and existences of optimal CN power and number. Meanwhile, Monte Carlo simulation results match to the theoretical results well.
Keywords
Cognitive radio; cooperative spectrum sensing; tradeoff of cooperation and transmission; throughput maximization;
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Times Cited By KSCI : 2  (Citation Analysis)
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