Title: Data compression by discrete wavelet transform using matched wavelet
Authors: Rashmi Gupta; Rajiv Kapoor
Addresses: Department of Electronics and Communication Engineering, Ambedkar Institute of Advanced Communication Technologies and Research, Affiliated to Guru Gobind Singh Indraprastha University, Delhi, India ' Department of Electronics and Communication Engineering, Delhi Technological University (Formerly Delhi College of Engineering), Delhi, India
Abstract: In this paper, the performance of the discrete wavelet transform is improved using matched wavelet as the mother wavelet for compression of power quality events. The matched wavelet is designed based on the characteristic of power quality event. The concept of Fractional Brownian Motion (FB-m) has been used to design the matched wavelet. The results are simulated using MATLAB version 7.3 and are compared with the mostly used Daubechies wavelet.
Keywords: discrete wavelet transform; DWT; matched wavelet; fractional Brownian motion; data compression; maximum likelihood estimator; power quality events; simulation.
International Journal of Signal and Imaging Systems Engineering, 2015 Vol.8 No.4, pp.205 - 214
Received: 22 Mar 2012
Accepted: 07 Feb 2013
Published online: 10 Jul 2015 *