title: An efficient closed-form design method for nearly perfect reconstruction of non-uniform filter bank.
abstract: In this paper, an efficient closed form method for the design of multi-channel nearly perfect reconstruction of non-uniform filter bank with the prescribed stopband attenuation and channel overlapping is presented. In this method, the design problem of multi-channel non-uniform filter bank (NUFB) is considered as the design of a prototype filter whose magnitude response at quadrature frequency is 0.707, which is exploited for finding the optimum passband edge frequency through empirical formula instead of using single or multivariable optimization technique. Two main attributes used in assessing the performance of filter bank are peak reconstruction error (PRE) and computational time (CPU time). As compared to existing methods, this method is very simple and easy to implement for NUFBs. To implement this algorithm, a Matlab program has been developed, and several examples are presented to illustrate the performance of proposed method.
authors: PDPM Indian Institute of Information Technology Design and Manufacturing, Jabalpur 482005, MP, India. Electronic address: anilkdee@gmail.com.
authors: A
authors: A
authors: Kumar
authors: PDPM Indian Institute of Information Technology Design and Manufacturing, Jabalpur 482005, MP, India. Electronic address: rpooja29@gmail.com.
authors: R
authors: R
authors: Pooja
authors: Indian Institute of Technology Roorkee, Roorkee 247667, Uttrakhand. Electronic address: gksngfee@gmail.com.
authors: G K
authors: GK
authors: Singh
keywords: Multirate filter bank; Quadrature mirror filter (QMF); Tree-structure non-uniform filter banks (NUFBs)