Design of doubly complementary filters with approximate linearphase |
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Authors: | Klouche-Djedid A Lawson SS |
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Affiliation: | Sch. of Eng., Warwick Univ., Coventry; |
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Abstract: | A new procedure for the design of a real doubly complementary (DC) pair of digital filters obtained from an all-pass structure is presented. The filter design is based on a zero-phase FIR filter design with multi-band frequency specifications and approximate linear-phase characteristic. The resulting complex or real all-pass filter structure is guaranteed to be stable. Some examples illustrating the design method including comparisons with conventional approximately linear phase IIR filters are also shown |
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