منابع مشابه
Frequency Estimation Based on the Cumulated Lomb-scargle Periodogram
We consider the problem of estimating the period of an unknown periodic function observed in additive Gaussian noise sampled at irregularly spaced time instants in a semiparametric setting. To solve this problem, we propose a novel estimator based on the cumulated Lomb-Scargle periodogram. We prove that this estimator is consistent, asymptotically Gaussian and we provide an explicit expression ...
متن کاملGap filling and noise reduction of unevenly sampled data by means of the Lomb - Scargle periodogram
The Lomb-Scargle periodogram is widely used for the estimation of the power spectral density of unevenly sampled data. A small extension of the algorithm of the Lomb-Scargle periodogram permits the estimation of the phases of the spectral components. The amplitude and phase information is sufficient for the construction of a complex Fourier spectrum. The inverse Fourier transform can be applied...
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Cyclic patterns of gene expression have been known and studied under various criteria like cell division, circadian rhythms, etc. Microarrays allow us to do such studies on a genome-wide scale. Several methods have been proposed to computationally determine and rank the (genes with) strongly cyclic expression profiles, as distinguished from those that are weak/not cyclic, from thousands of gene...
متن کاملFrequency Estimation And Generalized Lomb-Scargle Periodograms
Using Bayesian probability theory we demonstrate that the Lomb-Scargle periodogram may be generalized in a straightforward manner to nonuniformly nonsimultaneously sampled quadrature data when the sinusoid has arbitrary amplitude modulation. This generalized Lomb-Scargle periodogram is the sufficient statistic for single frequency estimation in a wide class of problems ranging from stationary f...
متن کاملSearching for Periodic Gene Expression Patterns Using Lomb-Scargle Periodograms
The Lomb-Scargle periodogram approach was applied to the search for periodically expressed genes in a Plasmodium falciparum dataset. The Lomb-Scargle algorithm has several computational advantages over more common approaches, such as Fourier analysis, including direct treatment of missing values and and a periodogram that has known statistical properties. Hierarchical clustering of periodograms...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2009
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:200811296