An improved method for the design of 2-D FIR digital filters with circular and rectangular cut-off boundary using Kaiser window
Majid Ahmadi, A. Chottera · Canadian Electrical Engineering Journal · 1983
A minimax approach to the design of 2-D FIR digital filters is given. This method utilizes the well-known Fourier series method in conjunction with Kaiser window. A suitable non-linear optimization method for calculating the parameter α of the Kaiser window is used in order to minimize the maximum of error in the passband and stopband of the filter. This technique provides some improvement over the straightforward approach whereby α is calculated by the empirical formula of Kaiser. To illustrate the method, several examples of 2-D lowpass FIR digital filters with circular and rectangular cut-off boundary are given.