Time Domain Analysis of Two-Channel QMF Bank

Abstract

This manuscript presents a time domain analysis of two-channel quadrature mirror filter (QMF) bank. Product terms in the system function of the QMF bank have been replaced by the respective convolution sums. The perfect reconstruction condition and an expression for ripple energy of the QMF bank have been obtained in time domain. Symmetry properties of the filters have been exploited which obviously reduces the computational complexity.

Indexing terms:

• Multirate
• Perfect reconstruction
• Filter banks
• Subband

Additional information

Notes on contributors

O P Sahu

O P Sahu received his BE degree in 1989 and M Tech degree in 1991 both in Electronics and Communication Engineering from Rani Durgavati Vishvavidyalaya, Jabalpur and Kurukshetra University, Kurukshetra respectively. He received his PhD degree in 2005 from Kurukshetra University, Kurukshetra in the area of Multirate Filter Banks. He joined NIT (then REC), Kurukshetra as a Lecturer in 1991 in the department of Electronics and Communication Engineering and was promoted as an Assistant Professor in 1999 and is still working there. He has more than 15 papers in his credit in National and International Conferences and Journals. His Research interests include signals and systems, digital signal processing and fuzzy systems.

M K Soni

M K Soni did his BSc Engg in 1972 and MSc Engg in 1975 and PhD degree in 1988 from Kurukshetra University, Kurukshetra in Electrical Engineering. He has been in teaching profession since 1974 at National Institute of Technology, Kurukshetra. He was promoted to Professor in 1994. He had been Chairman of Electrical Engineering Department at NIT, Kurukshetra. He had created the facilities for Centre of Computing and Networking at NIT Kurukshetra. Dr Soni has guided more than 60 MTech dissertations and three PhDs. He has published more than 65 research papers in different international/national journal and conferences. At present he is guiding five PhDs. His area of interest is DSP, computer control and automation

I M Talwar

IM Talwar did his MSc (Physics) and PhD in 1963 and 1969, respectively, from University of Sagar. He started his carrier as a lecturer in Physics and rose to the level of Professor and Chairman in the Department of Electronics and Communication Engineering, NIT, Kurukshetra. He has guided more than 25 MTech dissertations and supervised three PhDs. Dr Talwar has produced over 130 research papers in national/international journals and conferences. He has visited many USA universities and delivered expert lectures. His current areas of interest include digital image processing and digital signal processing.