DocumentCode :
1142835
Title :
Optimization of Cooperative Sensing in Cognitive Radio Networks: A Sensing-Throughput Tradeoff View
Author :
Peh, Edward Chu Yeow ; Liang, Ying-Chang ; Guan, Yong Liang ; Zeng, Yonghong
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore
Volume :
58
Issue :
9
fYear :
2009
Firstpage :
5294
Lastpage :
5299
Abstract :
In cognitive radio networks, the performance of the spectrum sensing depends on the sensing time and the fusion scheme that are used when cooperative sensing is applied. In this paper, we consider the case where the secondary users cooperatively sense a channel using the k -out-of-N fusion rule to determine the presence of the primary user. A sensing-throughput tradeoff problem under a cooperative sensing scenario is formulated to find a pair of sensing time and k value that maximize the secondary users´ throughput subject to sufficient protection that is provided to the primary user. An iterative algorithm is proposed to obtain the optimal values for these two parameters. Computer simulations show that significant improvement in the throughput of the secondary users is achieved when the parameters for the fusion scheme and the sensing time are jointly optimized.
Keywords :
cognitive radio; iterative methods; optimisation; wireless channels; cognitive radio networks; computer simulations; fusion scheme; iterative algorithm; k -out-of-N fusion rule; optimization; spectrum sensing; wireless channels; Cognitive radio; cooperative sensing; sensing-throughput tradeoff;
fLanguage :
English
Journal_Title :
Vehicular Technology, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9545
Type :
jour
DOI :
10.1109/TVT.2009.2028030
Filename :
5169958
Link To Document :
بازگشت