Abstract
It’s well known that a signal-noise-ratio(SNR) threshold named ”SNR wall” [5] appears in the energy detection due to the noise uncertainty. It makes energy detector(ED) highly non-robust in low SNR environment. In this paper, a log-normal distribution model of the noise power uncertainty is proposed. The detection performances of the energy detector are analyzed based on the proposed noise model. The numerical results illustrate that not only local but also cooperative low SNR Eds are reduced to invalid for a biggish noise power uncertainty.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
Haykin, S.: Cognitive radio: Brain-empowered wireless communications. IEEE Journal on Selected Areas in Communications 23(2), 201–220 (2005)
Federal Communications Commission, .Notice of Proposed Rulemaking, in the matter of unlicensed operation in the TV broadcast bands (ET Docket No. 04-186) and additional spectrum for unlicensed devices below 900 MHz and in the 3 GHz band (ET Docket No. 02-380), FCC 04-113 (May 2004)
Urkowitz, H.: Energy detection of unkown deterministic signals. Proceedings of the IEEE 55(4), 523–531 (1967)
Tandra, R., Sahai, A.: Fundamental limits on detection in low SNR under noise uncertainty. In: 2005 International Conference on Wireless Networks, Communications and Mobile Computing, pp. 464–469 (2005)
Tandra, R., Sahai, A.: SNR walls for signal detection. IEEE Journal of Selected Topics in Signal Processing 2, 4–17 (2008)
Sonnenschein, A., Fishman, P.M.: Radiometric detection of spreadspectrum signals in noise of uncertain power. IEEE Trans. Aerosp. Electron. Syst. 28, 654–660 (1992)
Zeng, Y., Liang, Y.-C., Hoang, A.T., Peh, E.C.Y.: Reliability of Spectrum Sensing Under Noise and Interference Uncertainty. In: Proc. - IEEE Int. Conf. Commun. Workshops, ICC 2009 (2009)
Lin, W., Zhang, Q.: A design of energy detector in cognitive radio under noise uncertainty. In: ICCS 2008, pp. 213–217 (November 2008)
Letaief, K.B., Zhang, W.: Cooperative Communications for Cognitive Radio Networks. Proceedings of the IEEE 97(5) (May 2009)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2010 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Ji, G., Zhu, H. (2010). Noise Uncertainty Study of the Low SNR Energy Detector in Cognitive Radio. In: Wang, F.L., Deng, H., Gao, Y., Lei, J. (eds) Artificial Intelligence and Computational Intelligence. AICI 2010. Lecture Notes in Computer Science(), vol 6319. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-16530-6_30
Download citation
DOI: https://doi.org/10.1007/978-3-642-16530-6_30
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-16529-0
Online ISBN: 978-3-642-16530-6
eBook Packages: Computer ScienceComputer Science (R0)