Signal processing for radio astronomical arrays

Alle Jan Van Der Veen*, Amir Leshem, Albert Jan Boonstra

*Corresponding author for this work

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

35 Scopus citations

Abstract

Radio astronomy forms an interesting application area for array signal processing techniques. Current synthesis imaging telescopes consist of a small number of identical dishes, which track a fixed patch in the sky and produce estimates of the time-varying spatial covariance matrix. The observations are distorted by RFI, e.g., radio, TV, radar and satellite signals. We describe some of the tools that array signal processing offers to filter out the interference, based on eigenvalue decompositions and factor analysis, a more general technique applicable to partially calibrated arrays. We consider spatial filtering techniques using projections, and discuss how a reference antenna pointed at the interferer can improve the performance. We also consider image formation and its relation to beamforming. Finally, we briefly discuss some future radio telescopes, which will consist of distributed phased arrays with 10,000s to 100,000s of elements.

Original languageAmerican English
Title of host publication2004 Sensor Array and Multichannel Signal Processing Workshop
Pages1-10
Number of pages10
StatePublished - 2004
Externally publishedYes
Event2004 Sensor Array and Multichannel Signal Processing Workshop - Barcelona, Spain
Duration: 18 Jul 200421 Jul 2004

Publication series

Name2004 Sensor Array and Multichannel Signal Processing Workshop

Conference

Conference2004 Sensor Array and Multichannel Signal Processing Workshop
Country/TerritorySpain
CityBarcelona
Period18/07/0421/07/04

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