Radio transient detection in radio astronomical arrays

Avishay Antman, Amir Leshem

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

Celestial transient radio sources have attracted considerable scientific interest recently, but their investigation is hampered by the fact that they cannot be effectively detected by commonly used radio astronomy imaging techniques. One significant obstacle to observing radio transients is intermittent terrestrial radio frequency interference, which can appear as a transient signal. In this paper we propose two schemes for the detection of transient sources. The first is a generalized likelihood ratio test designed for terrestrial interferences that appear in the near field region. The second is a modification of the first one, designed for sources whose steering vector is known to be in the array manifold, such as astronomical sources. Both of the proposed detectors are based on two consecutive sample covariance matrices computed by the array, and they have the desirable property of a constant false alarm rate. We provide a simple analysis of the proposed method as well as a computer simulation. The computer simulation results suggest that the proposed detectors outperform the detector that is currently used by the low frequency array (LOFAR) radio telescope processor.

Original languageEnglish
Title of host publication2018 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2018 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages3439-3443
Number of pages5
ISBN (Print)9781538646588
DOIs
StatePublished - 10 Sep 2018
Event2018 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2018 - Calgary, Canada
Duration: 15 Apr 201820 Apr 2018

Publication series

NameICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
Volume2018-April
ISSN (Print)1520-6149

Conference

Conference2018 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2018
Country/TerritoryCanada
CityCalgary
Period15/04/1820/04/18

Bibliographical note

Funding Information:
This work was supported by ISF grants 903/2013 and 1240/2009

Publisher Copyright:
© 2018 IEEE.

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