Title: Performance of different window functions for designing quadrature mirror filter bank using closed form method
Authors: A. Kumar; R. Pooja; G.K. Singh
Addresses: PDPM Indian Institute of Information Technology Design and Manufacturing, Jabalpur 482005, Madhya Pradesh, India ' PDPM Indian Institute of Information Technology Design and Manufacturing, Jabalpur 482005, Madhya Pradesh, India ' Indian Institute of Technology Roorkee, Roorkee 247667, Uttrakhand, India; Department of Electrical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia
Abstract: In this paper, a closed form method for designing two-channel linear phase Quadrature Mirror Filter (QMF) bank presented by Kumar et al. is examined and improved by exploiting different window functions for designing the prototype filter for QMF bank. In this method, the optimum pass-band edge frequency is determined via empirical formula instead of using single or multivariable optimisation technique for the given stop-band attenuation and roll-off factor (RF). This method reduces the overall computational time with minimum amplitude distortion to make suitable design of QMF bank for applications, which are carried out in real or quasi-real time. Simulation results presented in this paper how enhanced performance of this algorithm over the other existing algorithms.
Keywords: multirate filter bank; two channel filter bank; closed form method; windowing; finite impulse response; FIR filter; window functions; quadrature mirror filter bank; QMF bank design; pass-band edge frequency; simulation.
International Journal of Signal and Imaging Systems Engineering, 2015 Vol.8 No.6, pp.367 - 379
Received: 03 Feb 2014
Accepted: 01 Jul 2014
Published online: 08 Nov 2015 *