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On the improvement of the successive projection method to design FIR filters with equiripple responses. (English) Zbl 1181.93085
Summary: This paper describes an improvement of Successive Projections (SP) to design FIR filters with an equiripple response. The filters obtained using the previous SP method always satisfy the given specifications. However, the frequency response of the obtained filters is not necessarily equiripple. In the proposed method, the average of the local maximum values of the error function in the $$n$$-th iteration step in the SP method is selected as the allowable deviation in the next iteration. The algorithm is iterated until the absolute value of the error between the desired frequency response and designed response becomes equiripple.
##### MSC:
 93E11 Filtering in stochastic control theory 93C80 Frequency-response methods in control theory 93E25 Computational methods in stochastic control (MSC2010)