Title :
Impulse invariance and multiple-order poles
Author :
Cavicchi, Thomas J.
Author_Institution :
Dept. of Electr. Eng., Grove City Coll., PA, USA
fDate :
9/1/1996 12:00:00 AM
Abstract :
The impulse-invariant method of IIR digital filter design from a given analog filter is useful both in filter design and especially in discrete-time simulation of continuous-time systems. The article clarifies aspects of impulse invariance and, in particular, the handling of multiple-order poles. The user is currently faced with incorrect formulas and Matlab software. The problems are discussed, and a method valid for any order poles is presented via a numerical example using original Matlab code
Keywords :
IIR filters; circuit CAD; digital filters; filtering theory; poles and zeros; IIR digital filter design; Matlab code; Matlab software; analog filter; continuous-time systems; discrete-time simulation; impulse invariance; impulse-invariant method; incorrect formulas; multiple-order poles; Cities and towns; Convolution; Digital filters; Discrete transforms; Frequency; IIR filters; Matched filters; Network address translation; Sampling methods; Transfer functions;
Journal_Title :
Signal Processing, IEEE Transactions on
