We present a method for obtaining a time-varying spectrum that is particularly suited when the data are in event-based form. This form arises in many areas of science and engineering, and especially in astronomy, where one has photon counting detectors. The method presented consists of three procedures. First, estimating the density using the kernel method; second, highpass filtering the manifestly positive density; finally, obtaining the time-frequency distribution with a modified Welch's method. For the sake of validation, event-based data are generated from a given distribution and the proposed method is used to construct the time-frequency spectrum and is compared to the original density. The results demonstrate the effectiveness of the method.
Instantaneous spectrum estimation of event-based densities / GALLEANI L.; COHEN L.; NELSON D.; SCARGLE J. D.. - In: EURASIP JOURNAL ON APPLIED SIGNAL PROCESSING. - ISSN 1110-8657. - ELETTRONICO. - 2002:1(2002), pp. 87-91. [10.1155/S1110865702000380]
|Titolo:||Instantaneous spectrum estimation of event-based densities|
|Data di pubblicazione:||2002|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1155/S1110865702000380|
|Appare nelle tipologie:||1.1 Articolo in rivista|
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