Multichannel detection and spatial signature estimation with uncalibrated receivers

Amir Leshem*, Alle Jan Van der Veen

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

27 Scopus citations

Abstract

A problem occuring in radio astronomy is the detection and cancellation of spatially correlated interfering signals entering via the sidelobes of the telescopes in an array. A complicating factor is that the noise powers can be different at each telescope. For the case that the sensors are uncalibrated, we formulate the detection problem as a test on the covariance structure, state the GLRT for this problem, and relate it to a simpler ad-hoc detector. We derive algorithms to estimate the noise powers and the subspace of interferer signature vectors. Once the subspace is estimated, the interference can be projected out. We compare this method to the conventional multichannel subspace detector and show its robustness to non-identical channels on data collected with the Westerbork radio telescope.

Original languageAmerican English
Pages190-193
Number of pages4
StatePublished - 2001
Externally publishedYes
Event2001 IEEE Workshop on Statitical Signal Processing Proceedings - Singapore, Singapore
Duration: 6 Aug 20018 Aug 2001

Conference

Conference2001 IEEE Workshop on Statitical Signal Processing Proceedings
Country/TerritorySingapore
CitySingapore
Period6/08/018/08/01

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