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Whitening of non-stationary noise from gravitational wave detectors

Elena Cuoco1, Giancarlo Cella2 and Gianluca M Guidi3

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We investigate the possibility of improving the detection efficiency for deterministic gravitational wave signals in the presence of non-stationary noise. The proposed method is based on an adaptive whitening procedure to be applied to the experimental data, and depends on a 'forgetting factor' parameter λ. We test the method on simulated data, and show that by choosing λ appropriately it is possible to reduce the non-stationarity noise of the time series and to implement a detector which approaches the performances of the optimal Wiener filter for a deterministic signal in the presence of non-stationary noise of known Gaussian statistic.


PACS

04.80.Nn Gravitational wave detectors and experiments

02.50.Cw Probability theory

MSC

83C35 Gravitational waves

60G15 Gaussian processes

Subjects

Computational physics

Gravitation and cosmology

Dates

Issue 5 (7 March 2004)

Received 1 September 2003

Published 10 February 2004



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