Scale domain analysis of a bat sonar signal

Scale domain signal analysis has been developed in response to the need to analyse Doppler-tolerant waveforms or self-similar random signals. Following Cohen's concept of scale representations, this paper introduces the concept of higher-order scale-spectra and investigates advantages and drawbacks of scale domain versus the traditional frequency domain analysis. Several scale-domain methods are applied to a natural signal (a bat echolocation pulse) including the scale spectrum, the scale bispectrum and a smoothed Q time-scale distribution.<
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