Table of Contents
International Journal of Oceanography
Volume 2014, Article ID 563780, 7 pages
http://dx.doi.org/10.1155/2014/563780
Research Article

Noisy Reverberation Suppression Using AdaBoost Based EMD in Underwater Scenario

Department of ECE, College of Engineering, Andhra University, Visakhapatnam, India

Received 23 August 2013; Revised 10 December 2013; Accepted 19 December 2013; Published 4 February 2014

Academic Editor: Heinrich Hühnerfuss

Copyright © 2014 Kusma Kumari Cheepurupalli and Raja Rajeswari Konduri. 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

Reverberation suppression is a crucial problem in sonar communications. If the acoustic signal is radiated in the water as medium then the degradation is caused due to the reflection coming from surface, bottom, and volume of water. This paper presents a novel signal processing scheme that offers an improved solution in reducing the effect of interference caused due to reverberation. It is based on the combination of empirical mode decomposition (EMD) and adaptive boosting (AdaBoost) techniques. AdaBoost based EMD filtering technique is used for reverberation corrupted chirp signal to decrease the noisy components present in the received signal. An improvement in the probability of detection is achieved using the proposed algorithm. The simulation results are obtained for various reverberation times at various SNR levels.