Comparison of signals from gravitational wave detectors with instantaneous time-frequency maps

被引：4

作者：

Stroeer, A. ^{[1
,2
]}

Blackburn, L. ^{[2
]}

Camp, J. ^{[2
]}

机构：

[1] Univ Maryland, CRESST, College Pk, MD 20742 USA

[2] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

来源：

CLASSICAL AND QUANTUM GRAVITY | 2011年 / 28卷 / 15期

关键词：

EMPIRICAL MODE DECOMPOSITION; LIGO;

D O I：

10.1088/0264-9381/28/15/155001

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Gravitational wave astronomy relies on the use of multiple detectors, so that coincident detections may distinguish real signals from instrumental artifacts, and also so that relative timing of signals can provide the sky position of sources. We show that the comparison of instantaneous time-frequency and time-amplitude maps provided by the Hilbert-Huang Transform (HHT) can be used effectively for relative signal timing of common signals, to discriminate between the case of identical coincident signals and random noise coincidences and to provide a classification of signals based on their time-frequency trajectories. The comparison is done with chi(2) goodness-of-fit method which includes contributions from both the instantaneous amplitude and frequency components of the HHT to match two signals in the time domain. This approach naturally allows the analysis of waveforms with strong frequency modulation.

引用

页数：12

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