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

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.

Authors:

• Neela. R. Rayavarapu
• Neelam Rup Prakash

Keywords:

• Cosine modulated filter bank
• interpolated FIR filter
• optimum interpolation factor
• prototype filter.

References:

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