Rapid synthesis of random sea surfaces using recursive digital filters

Gaussian and non-Gaussian sea surfaces are treated using low order recursive digital filters as modeling elements. These models are shown to be computationally efficient as compared to the conventional FFT method and they can readily be extended to include nonlinearities using block modeling techniques. This approach is useful for certain situations where high resolution is required, in cases of real time simulation experiments with free running synthesizer and where nonlinearities may be significant.