On characterization and application of oscillatory almost-cyclostationary processes. Napolitano, A. In 2017 25th European Signal Processing Conference (EUSIPCO), pages 1654-1658, Aug, 2017.
On characterization and application of oscillatory almost-cyclostationary processes [pdf]Paper  doi  abstract   bibtex   
The class of the second-order oscillatory almost-cyclostationary processes is characterized. These processes have autocorrelation function which is the superposition of amplitude- and angle-modulated complex sinewaves, where the modulating functions, referred to as evolutionary cyclic autocorrelation functions, depend on both time and lag parameter. This class of processes includes that of the almost-cyclostationary processes. The problem of statistical function measurements is addressed for the special case of amplitude-modulated time-warped almost-cyclostationary processes. These processes are shown to be a suitable model for the electrocardiogram.

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