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          Document History for Document ID 403024

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Document Version Version Comment Date Status
403024.0 [No comment] 27.03.2009 13:02 Released

ID: 403024.0, MPI für Gravitationsphysik / Observational Relativity and Cosmology
Automatic cross-talk removal from multi-channel data
Authors:Allen, Bruce; Hua, Wensheng; Ottewill, Adrian C.
Date of Publication (YYYY-MM-DD):1999-09-27
Start Page:1
End Page:26
Review Status:not specified
Audience:Not Specified
Abstract / Description:A technique is described for removing interference from a signal of interest ("channel 1") which is one of a set of N time-domain instrumental signals ("channels 1 to N"). We assume that channel 1 is a linear combination of "true" signal plus noise, and that the "true" signal is not correlated with the noise. We also assume that part of this noise is produced, in a poorly-understood way, by the environment, and that the environment is monitored by channels 2 to N. Finally, we assume that the contribution of channel n to channel 1 is described by an (unknown!) linear transfer function R_n(t-t'). Our technique estimates the R_i and provides a way to subtract the environmental contamination from channel 1, giving an estimate of the "true" signal which minimizes its variance. It also provides some insights into how the environment is contaminating the signal of interest. The method is illustrated with data from a prototype interferometric gravitational-wave detector, in which the channel of interest (differential displacement) is heavily contaminated by environmental noise (magnetic and seismic noise) and laser frequency noise but where the coupling between these signals is not known in advance.
External Publication Status:submitted
Document Type:Article
Communicated by:Bruce Allen
Affiliations:MPI für Gravitationsphysik/Teilinstitut Hannover
MPI für Gravitationsphysik/Observational Relativity and Cosmology
External Affiliations:Department of Physics, University of Wisconsin-Milwaukee, P.O. Box 413, Milwaukee, Wisconsin 53201
Identifiers:URL:http://arxiv.org/abs/gr-qc/9909083
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9909083v1.pdf  [470,00 Kb] [Comment:arXiv]