Decomposition of Harmonically Distorted Chirps into their Harmonic Components

Two techniques to isolate the harmonic components of non-linear harmonically distorted chirps are presented. Harmonically distorted chirps occur among other fields in the vibroseis technique in seismic exploration. The harmonic components are theoretically and practically important as their spectral ratios to the fundamental component are used for recorded data processing and source signal estimation. The method presented here is based merely on crosscorrelation and is straightforward and intuitive. Application of the techniques on real data is shown.