Wave digital filters for the migration of seismic data

Author

Bolle, Michael

Author_Institution

Robert Bosch GmbH, Hildesheim, Germany

fYear

1994

fDate

19-22 Apr 1994

Abstract

A closed form design method for migration wave digital filters (MWDF) is presented. Migration filters are 2-D fan shaped filters with a prescribed nonlinear phase in the passband. An analytical solution is presented which solves simultaneously the approximation problems for attenuation and phase. The attenuation is approximated in a maximally flat sense in pass- and stopband. The phase of the ideal migration filter is approximated in a way which is equivalent to the approximation of the wave equation by the McClellan transform. Efficient WDF structures, including a multiplier-free scheme, for the realization of MWDF are derived

Keywords

approximation theory; geophysical signal processing; nonlinear filters; seismology; transforms; two-dimensional digital filters; wave digital filters; 2D fan shaped filters; McClellan transform; analytical solution; approximation problem; attenuation; closed form design method; maximally flat passband; maximally flat stopband; migration wave digital filters; multiplier-free structures; nonlinear phase filters; seismic data; wave equation; Acoustic waves; Attenuation; Design methodology; Digital filters; Earth; Finite impulse response filter; Frequency response; Partial differential equations; Passband; Sensor arrays;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1994. ICASSP-94., 1994 IEEE International Conference on

Conference_Location

Adelaide, SA

ISSN

1520-6149

Print_ISBN

0-7803-1775-0

Type

conf

DOI

10.1109/ICASSP.1994.389909

Filename

389909