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A design method of FIR digital filters with variable stop bands using iterative WLS

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3 Author(s)
Toma Miyata ; Department of Applied Electronics Tokyo University of Science 2641 Yamazaki, Noda, Chiba 278-8510 Japan ; Tomoyuki Takahashi ; Naoyuki Aikawa

In the field of measurement signal processing, we should often change the characteristic of the stopband instantaneously. Such the filter that can change the frequency response instantaneously is called variable filter. We propose the design of FIR digital filters with variable stopbands. In this paper, the quasi-chebyshev characteristic is obtained by using an iterative weighted least square (WLS) method. Moreover, a memory required for the calculation for computing filter coefficients in the proposed method has the feature of being fewer than the conventional method. The usefulness of the proposed design method is verified through some examples.

Published in:

Information, Communications and Signal Processing, 2009. ICICS 2009. 7th International Conference on

Date of Conference:

8-10 Dec. 2009