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Design of Digital Notch Filters | IEEE Journals & Magazine | IEEE Xplore

Design of Digital Notch Filters


Abstract:

It is shown that a second-order digital notch filter is uniquely characterized by two distinct parameters, the notch frequency and the 3-dB rejection bandwidth. As a resu...Show More

Abstract:

It is shown that a second-order digital notch filter is uniquely characterized by two distinct parameters, the notch frequency and the 3-dB rejection bandwidth. As a result, such a filter can be realized using only two multipliers. Methods are outlined to design a notch filter for a prescribed notch frequency and a prescribed 3-dB rejection bandwidth, along with procedures for postdesign adjustment of these parameters. All two-multiplier, canonic and noncanonic, notch filter configurations are developed using the multiplier extraction approach. These networks are then compared with regard to the effect of internal multiplication roundoff errors. Results of computer simulation of the notch filter configurations are also included.
Published in: IEEE Transactions on Communications ( Volume: 22, Issue: 7, July 1974)
Page(s): 964 - 970
Date of Publication: 31 July 1974

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