Design of recursive digital filters for the selection or rejection of a particular velocity in seismic signals |
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Authors: | Boubacar Sako Kotaro Hirano |
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Affiliation: | (1) Department of Electronic Engineering, Kobe University, Rokko, Nada, 657 Kobe, Japan |
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Abstract: | In this paper a new type of velocity-selecting/rejecting filter which passes or stops a particular event in a seismic signal is proposed. The velocity-selecting filter is based on a time-space band-pass filter with sharp passband for a particular direction, and similarly, the velocity-rejecting filter is based on a time-space band-stop filter. A technique for designing such filters, in terms of an infinite-impulse-response (IIR) filter, is presented, in which a rotated version of separable filter is used. Finally, numerical examples are included to illustrate the design theory. |
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