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Journal Articles Signal Processing Year : 2002

Parametric modeling of photometric signals

Abstract

This paper studies a new model for photometric signals under high flux assumption. Photometric signals are modeled by Gaussian autoregressive processes having the same mean and variance denoted Constraint Gaussian Autoregressive Processes (CGARP's). The estimation of the CGARP parameters is discussed. The Cramér Rao lower bounds for these parameters are studied and compared to the estimator mean square errors. The CGARP is intended to model the signal received by a satellite designed for extrasolar planets detection. A transit of a planet in front of a star results in an abrupt change in the mean and variance of the CGARP. The Neyman–Pearson detector for this changepoint detection problem is derived when the abrupt change parameters are known. Closed form expressions for the Receiver Operating Characteristics (ROC) are provided. The Neyman–Pearson detector combined with the maximum likelihood estimator for CGARP parameters allows to study the generalized likelihood ratio detector. ROC curves are then determined using computer simulations.
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Dates and versions

hal-03604492 , version 1 (10-03-2022)

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André Ferrari, Jean-Yves Tourneret, Gérard Alengrin. Parametric modeling of photometric signals. Signal Processing, 2002, 82 (4), pp.649-661. ⟨10.1016/S0165-1684(01)00212-2⟩. ⟨hal-03604492⟩
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