Translations:Synthetic seismogram with multiples/6/en

We recall that the impulse response (without multiples) is generated by a purely feedforward system (with the reflection coefficients on the feedforward loops). Here, the expression for the Z-transform shows that the impulse response (with multiples) is generated by a feedforward-feedback system (with the reflection coefficients on the feedforward loops and the autocorrelation coefficients on the feedback loops). Equation 22, which is for the case of one layer, is exact. In other words, equation 22 gives the Z-transform of the impulse response for the dynamic model (equation 1).