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A method is presented for designing linear phase FIR digital filters with absolute upper and lower bounds on the filter frequency response. The design is by iteration based on polynomial interpolation. A proof of convergence of the algorithm is given. A user-oriented standard FORTRAN computer program, CONRIP, has been written to do the design. Copies of CONRIP are available from the authors.
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McCallig et al. (1978) studied this question.
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