Title :
An Improved Method for Designing Prototype Filter for M-Band Pseudo QMF Banks
Author :
Kumar, A. ; Singh, G.K. ; Anand, R.S.
Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Technol., Roorkee
Abstract :
This paper presents an iterative algorithm for the design of multichannel cosine modulated pseudo quadrature mirror filter (QMF) banks. In this algorithm, passband frequency is optimized to satisfy new perfect reconstruction condition at frequency (omega = pi/2M). The proposed algorithm is simple, and has high design efficiency. The performance of this algorithm is evaluated in terms of computational time (CPU time), reconstruction error (RE), number of iterations (NOI), aliasing distortion (AD) and signal to noise ratio (SNR). Several design examples are included to illustrate the proposed algorithm and its improved performances over other exiting methods.
Keywords :
channel bank filters; iterative methods; quadrature mirror filters; signal reconstruction; M-band pseudo QMF banks; aliasing distortion; computational time; multichannel cosine modulated pseudoquadrature mirror filter; passband frequency; prototype filter; reconstruction error; Algorithm design and analysis; Design methodology; Distortion; Filter bank; Frequency; Iterative algorithms; Mirrors; Passband; Prototypes; Signal to noise ratio; Cosine modulated filter bank; Multirate theory; Pseudo QMF bank; QMF bank;
Conference_Titel :
Computer Engineering and Technology, 2009. ICCET '09. International Conference on
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-3334-6
DOI :
10.1109/ICCET.2009.154
