Table of Contents
ISRN Signal Processing
Volume 2013, Article ID 148646, 8 pages
Research Article

Studies on Z-Window Based FIR Filters

1Department of Electronics & Communication Engineering, Jaypee University of Engineering & Technology, Guna 473226, India
2Department of Electronics & Communication Engineering, Samrat Ashok Technological Institute, Vidisha 464001, India

Received 7 June 2013; Accepted 29 July 2013

Academic Editors: I. Guler and C. S. Lin

Copyright © 2013 Rahul Pachauri et al. 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.


As per classification of the window functions, the Z-windows are grouped in the category of steerable side-lobe dip (SSLD) windows. In this work, the application of these windows for the design of FIR filters with improved filter parameters has been explored. The numbers of dips with their respective positions in the side-lobe region have been compositely used to tailor the window shape. Filter design relationships have been established and included in this paper. Simultaneously, an application of these Z-window based FIR filters in designing two-channel quadrature mirror filter (QMF) bank has been presented. Better values of reconstruction and aliasing errors have been achieved in contrast to the Kaiser window based QMF bank.