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Many signals encountered in passive sonar are approximately cyclo-stationary in that a given waveform is repeated at almost a constant rate. The underlying physical process causing the sound is often a complex train of nonidentical impulses. The ability to track the frequency of these pulses over time can be used in such things as detection, classification(More)
The cepstrum transform can be used to determine the periodicity of an input si@. There are cases where the cepstrum fails. The input signal may contain very few b o n i c s , or contain only odd harmonics. There may be a c h q in the input signal which will broaden the spectral components. It is possible to improve the cepstrum's operation by mtroducing(More)
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