Title :
A new method for estimating signal matched dual tree complex wavelet system
Author :
Swamy, Shanti ; Joshi, S.D. ; Kumar, E. Y Naresh
Author_Institution :
Mtech IIT Delhi, Nagpur, India
Abstract :
The dual-tree complex wavelet transform (CWT) is a relatively recent enhancement to the discrete wavelet transform (DWT). It is nearly shift invariant and directionally selective in two and higher dimensions. Firstly the works of A.Gupta is studied for real wavelets and on the similar lines equations are formulated for real signal and complex -valued filter coefficients for 2-channel complex filter bank. Secondly the equations are written for complex inputs and complex filters. The matched wavelet filter bank concept is implemented for the dual tree system with the help of derived equations.
Keywords :
channel bank filters; discrete wavelet transforms; 2-channel complex filter bank; complex-valued filter coefficients; directionally selective; discrete wavelet transform; dual-tree complex wavelet transform; matched wavelet filter bank; shift invariant; signal estimation; Continuous wavelet transforms; Differential equations; Discrete wavelet transforms; Filter bank; Finite impulse response filter; Matched filters; Research and development; Signal analysis; Wavelet analysis; Wavelet transforms;
Conference_Titel :
Multimedia, Signal Processing and Communication Technologies, 2009. IMPACT '09. International
Conference_Location :
Aligarh
Print_ISBN :
978-1-4244-3602-6
Electronic_ISBN :
978-1-4244-3604-0
DOI :
10.1109/MSPCT.2009.5164170
