Abstract
This work presents a comparison among three data analysis techniques and their application to the study of wind waves: Fourier spectrum, wavelet and Hilbert-Huang Transform (HHT). Several examples are developed using synthetic free surface elevation data, emphasizing nonstationary and non linear properties, and their respective spectral analysis. In order to test the methodology, free surface elevation data measured during the second campaign of the BRISA project (“BReaking waves and Induced SAnd transport”) were analyzed
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