Design of inherently stable two-dimensional recursive filters imitating the behaviour of one-dimensional analog filters

A novel method is presented for the design of two— dimensional (2—D) recursive filters that are inherently stable, thereby avoiding computationally lengthy tests of stability. The new method is based on mapping the 1—P continuous complex frequency variable s by an appropriate function of the 2—1) digital filter variables Z1 and Z2. Thus, passive analog… (More)