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Journal of Sensors
Volume 2014, Article ID 531254, 6 pages
http://dx.doi.org/10.1155/2014/531254
Research Article

A Novel Blind Event Detection Method for Wireless Sensor Networks

1School of Electronics Engineering, Hanoi University of Industry, Minh Khai Commune, Tu Liem District, Ha Noi, Vietnam
2Korea Electrotechnology Research Institute, Ansan City, Gyeonggi-do 426-170, Republic of Korea
3School of Electrical Engineering, University of Ulsan, Muger-dong San-29, Ulsan, Republic of Korea

Received 27 March 2014; Revised 17 April 2014; Accepted 17 April 2014; Published 7 May 2014

Academic Editor: Athanasios V. Vasilakos

Copyright © 2014 Thuc Kieu-Xuan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Student's t-distribution is utilized to derive a novel method for event detection in wireless sensor networks. Numerical analysis is used to show that under the same conditions, the proposed event detection method is comparable to likelihood ratio-based detection method and that it significantly outperforms energy detection method in terms of detection performance. Moreover, the proposed method does not require perfect knowledge of noise variance to set up a decision threshold in terms of a false alarm probability as the likelihood ratio based detection and the energy detection do.