A digital filtering approach for Time Domain Vector Fitting

2011 ◽  
Author(s):  
Andrea Ubolli ◽  
Bjorn Gustavsen
Keyword(s):  
Time Domain ◽  
Digital Filtering ◽  
Vector Fitting ◽  
Filtering Approach

PRINCIPLES OF DIGITAL FILTERING

Geophysics ◽  
1964 ◽  
Vol 29 (3) ◽  
pp. 395-404 ◽  
Author(s):  
E. A. Robinson ◽  
S. Treitel
Keyword(s):  
Frequency Domain ◽  
Digital Filter ◽  
Time Domain ◽  
Digital Filtering ◽  
Phase Lag ◽  
Electronic Networks ◽  
Versatile Tool ◽  
The Time Domain ◽  
Weighting Coefficients

The digital computer is a versatile tool that may be used to filter seismic traces. Conventional filtering is performed by means of analog‐type electronic networks, whose behavior is ordinarily studied in the frequency domain. Digital filtering, on the other hand, is more fruitfully treated in the time domain. A digital filter is represented by a sequence of numbers called weighting coefficients. The output of a digital filter is obtained by convolving the digitized input trace with the filter’s weighting coefficients. The mechanics of digital filtering in the time domain are described with the aid of discrete z‐transform theory. These ideas are then related to the more familiar interpretation of filter behavior in the frequency domain. An important criterion for the classification of filters is the notion of “minimum phase‐lag.” This paper ends with a new and simple presentation of this concept.

Sign in / Sign up

Export Citation Format

Share Document