A GMM-Based Target Classification Scheme for a Node in Wireless Sensor Networks

Abstract

In this paper, an efficient node-level target classification scheme in wireless sensor networks (WSNs) is proposed. It uses acoustic and seismic information. and its performance is verified by the classification accuracy of vehicles in a WSN. Because of the hard limitation in resources. parametric classifiers should be more preferable than non-parametric ones in WSN systems. As a parametric classifier, the Gaussian mixture model (GMM) algorithm not only shows good performances classify targets in WSNs. but it also requires very few resources suitable to a sensor node. In addition. our sensor fusion method uses a decision tree. generated by the classification and regression tree (CART) algorithm, to improve the accuracy. so that the algorithm drives a considerable increase of the classification rate using less resources. Experimental results using a real dataset of WSN show that the proposed scheme shows a 94.10% classification rate and outperforms the k-nearest neighbors and the support vector machine.