High quality low order nonrecursive digital filters design using modified Kaiser window

In this paper, nonrecursive digital filters design using the modified Kaiser window is investigated. The well known 2-parameter Kaiser window is modified by introducing a new third parameter. Two examples are given to compare the performances of the filters designed by the modified Kaiser window and the well known adjustable windows in literature such as the ultraspherical, Saramaki, Kaiser and Dolph-Chebyshev. Simulation results demonstrate that the filters designed by the modified Kaiser window provide higher quality in terms of the minimum stopband attenuation for a fixed order, and yield lower order for a fix minimum stopband attenuation compared to the filters designed by other windows.