A Computationally Efficient Design for Prototype Filters of an M-Channel Cosine Modulated Filter Bank

Authors: Neela. R. Rayavarapu, Neelam Rup Prakash

Abstract:

The paper discusses a computationally efficient method for the design of prototype filters required for the implementation of an M-band cosine modulated filter bank. The prototype filter is formulated as an optimum interpolated FIR filter. The optimum interpolation factor requiring minimum number of multipliers is used. The model filter as well as the image suppressor will be designed using the Kaiser window. The method will seek to optimize a single parameter namely cutoff frequency to minimize the distortion in the overlapping passband.

Keywords: Cosine modulated filter bank, interpolated FIR filter, optimum interpolation factor, prototype filter.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1058443

References:

[1] P.P Vaidyanathan, Multirate Systems and Filter Banks. Englewood Cliffs, NJ: Prentice- Hall, 1993.
[2] C.D. Creusere and S.K. Mitra, "A Simple method for designing high quality prototype filters for M-band pseudo QMF banks," IEEE Trans. Signal Processing, vol 43, pp.1005-1007, April 1994.
[3] Yuan-pei Lin and P.P. Vaidyanathan, " A Kaiser window approach for the design of prototype filters of cosine modulated filterbanks". IEEE Signal Processing Letters, vol5 pp.132-134, June 1998.
[4] Zijing Zhang and Licheng Jiao, "A Simple Method for Designing Pseudo QMF Banks". ICCT2000.
[5] Alireza Mehrnia and Alan N Wilson,Jr. "An Optimal IFIR filter design," ISCAS 2004,pp. 133-136.