Least square error optimal 2-D FIR filter design for nonsymmetric and symmetric specifications in discrete frequency domain circuits
Rathika Rajaravivarma, P.K. Rajan · 2003
The least square error optimal design of two-dimensional FIR (finite impulse response) digital filters when the specifications are given in the discrete frequency domain is examined in detail. Employing Parseval's relation for 2-D DFT (discrete Fourier transform) arrays, optimal filter impulse response is determined for the filter coefficients. Simplified expressions for the cases where the frequency response possesses quadrantal symmetry are also derived.>