An optimization scheme for choosing the
optimum number of secondary users in cooperative spectrum sensing
based on the cyclostationary feature detection with Neyman-Pearson
criterion is proposed in this paper. The optimal soft combination
test statistic for the cooperative spectrum sensing based on
cyclostationary feature detection is derived according to the
generalized likelihood ratio test and its corresponding detection
performance is deduced. A target function, considering two important
parameters as the resource use efficiency and the number of samples
employed by each cooperative secondary user in the system design, is
constructed to obtain the optimum number of cooperative secondary
users. It can be found that the selection scheme is to make a
tradeoff between the system complexity of the cognitive radio
network and the global sensing performance of the cooperative
spectrum sensing.
LIN Ying-pei (林英沛), HE Chen (何 晨), JIANG Ling-ge (蒋铃鸽), HE Di (何 迪)
. A Selection Scheme for Optimum Number of Cooperative Secondary Users in Spectrum Sensing[J]. Journal of Shanghai Jiaotong University(Science), 2011
, 16(6)
: 652
-657
.
DOI: 10.1007/s12204-011-1206-4
1 Ma J, Li G Y, Juang B H. Signal processing in
cognitive radio [J]. Proceedings of the IEEE, 2009,
97 (5): 805-823.
2 Mishra S M, Sahai A, Brodersen R W. Cooperative sensing among
cognitive radios[C]// Proceedings of International Conference
on Communications. Istanbul, Turkey: IEEE, 2006: 1658-1663.
3 Zeng K, Pawelczak P, Cabric D. Reputation-based cooperative spectrum
sensing with trusted nodes assistance [J]. IEEE Communications
Letters, 2010, 14 (3): 226-228.
4 Fan R, Jiang H. Optimal multi-channel cooperative
sensing in cognitive radio networks [J]. IEEE Transactions on
Wireless Communications, 2010, 9 (3): 1128-1138.
5 Ma J, Zhao G, Li Y. Soft combination and detection for cooperative
spectrum sensing in cognitive radio networks [J]. IEEE
Transactions on Wireless Communications, 2008, 7 (11):
4502-4507.
6 Lund\' e n J, Koivunen V, Huttunen A, et al. Collaborative cyclostationary spectrum sensing for cognitive radio systems [J]. IEEE Transactions on Signal Processing, 2009, 57 (11): 4182-4195.
7 Chen Y. Optimum number of secondary users in collaborative spectrum sensing considering resources usage efficiency [J]. IEEE Communications Letters, 2008, 12 (12): 877-879.
8 Dandawat\' e A V, Giannakis G B. Statistical tests for presence of cyclostationarity [J]. IEEE Transactions on Signal Processing , 1994, 42 (9): 2355-2369.
9 Feng H, Wang Y, Li S. Statistical test based on finding the optimum lag in cyclic autocorrelation for detecting free bands in cognitive radios [C]// Proceedings of the Third International Conference on Cognitive Radio Oriented Wireless Networks and Communications.
Singapore: IEEE, 2008: 1-6.
10 Kay S M. Fundamentals of statistical signal processing. II. Detection theory [M]. Sebastopol, CA: Prentice Hall, 1998.
