ON WLS-CHEBYSHEV FIR DIGITAL FILTERS
Paulo S. R. Diniz, Sergio Lima Netto · Journal of Circuits Systems and Computers · 1999
A new numerical approach for designing FIR digital filters is proposed. The method is able to compromise maximum stopband attenuation and minimum stopband energy requirements. The approach is based on the weighted-least-squares (WLS) method using, at each iteration, a different weight function, which is made constant within a given frequency interval. In that manner, digital filters with partially equiripple and partially WLS-like stopbands are efficiently obtained. Generality of the method makes it suitable for the design of linear- and arbitrary-phase FIR filters.