Algebraic approach to two-dimensional recursive digital filter synthesis
JAMES A. CADZOW, T.-C. Chen · IEEE Transactions on Acoustics Speech and Signal Processing · 1989
An effective algorithm is developed for synthesizing two-dimensional recursive digital filters which approximate prescribed ideal frequency response specifications. The algorithm is based on an algebraic approach that uses the eigenvalue-eigenvector decomposition of the ideal filter's excitation-response matrix in conjunction with a recently developed signal-enhancement method. This results in a recursive filter which has a unit impulse that closely approximates the ideal filter's unit-impulse response. Illustrative examples and comparisons to an existing technique are included.>