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Design of IIR multiple notch filters based on all-pass filters
1999
IEEE transactions on circuits and systems - 2, Analog and digital signal processing
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A new method for the design of multiple notch filters is presented using an all-pass filter of order 2N, N being the number of notch frequencies. The all-pass filter is realized as a cascade of N second-order all-pass sections. Besides meeting the notch frequency specifications exactly, the method ensures that the realized 3-dB bandwidths are lower than those specified. Illustrative examples are given. Index Terms-All-pass filter-based design, digital filters, multiple notch filters.
doi:10.1109/82.752914
fatcat:5mzl4d26greche4c7rcgubj2vm