A comparison of transfer function simplification methods
Manohar Lal, R. Mittra · IEEE Transactions on Automatic Control · 1974
This communication establishes the equivalence of two important approaches to transfer function simplification viz. simplification by moment matching [1] and simplification by continued fraction expansion and truncation [2]. It is further shown that another approach to transfer function simplification based on frequency response matching [3], [4], is closely related to the first two approaches.