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Soner Bekleric Title of Thesis: Nonlinear Prediction via Volterra Ser

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5.4. REAL DATA EXAMPLES 85<br />

Time [s] (s)<br />

3.6<br />

3.8<br />

4.0<br />

4.2<br />

4.4<br />

Traces<br />

10 20 30 40 50 60<br />

Traces<br />

70 80 90 100 110 120 130 140<br />

Data<br />

(a) (b) (c) (d)<br />

Figure 5.7: Real Data example common <strong>of</strong>fset gather (closer look). (a) Original<br />

data. (b) <strong>Prediction</strong> <strong>of</strong> multiples. (c) Adaptive multiple attenuation <strong>via</strong> f − x<br />

linear prediction error filtering. (d) Adaptive multiple attenuation obtained with a<br />

f − x nonlinear prediction error operator (third order <strong>Volterra</strong> series).<br />

and 5 seconds (in Figure 5.10(a)). Figures 5.10(c) and (d) provides similar results.<br />

I can see removed multiples in Figures 5.11(c) and (d); both methods remove some<br />

portion <strong>of</strong> multiples.

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