On 2-D partial fraction decomposition

Abstract In this paper we introduce a mapping technique of two-dimensional (2-D) auto correlation sequences to one dimensional (1-D) auto correlation sequences and obtain certain results useful in the test for existence of the decomposition of the form A(Z 1 ,Z 2 )A(Z 1 −1 ) B(Z 1 ,Z 2 )B(Z 1 −1 ) = P(Z 1 ,Z 2 ) B(Z 1 ,Z 2 ) + P(Z 1 −1 ) B(Z 1 −1 ) for a stable 2-D transfer function of a recursive digital filter defined by H(Z 1 ,Z 2 )= A(Z 1 ,Z 2 ) B(Z 1 ,Z 2 ) These results are simple alternative to that reported in the literature [7] earlier.