Adaptive suppression of RFI and its effect on radio-astronomical image formation

Author

Leshem, Amir ; Van der Veen, Alle-Jan

Author_Institution

Metalink Broadband Access, Yakum, Israel

Volume

3

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

616

Abstract

Radio-astronomical observations are increasingly contaminated by interference, and suppression techniques become essential. A powerful candidate for interference mitigation is adaptive spatial filtering. We study the effect of spatial filtering techniques on radio astronomical imaging. Current deconvolution procedures such as CLEAN are shown to be unsuitable for spatially filtered data, and the necessary corrections are derived. To that end, we reformulate the imaging (deconvolution/calibration) process as a sequential estimation of the locations of astronomical sources

Keywords

adaptive filters; adaptive signal processing; imaging; interference suppression; radioastronomical techniques; radiofrequency interference; radiosources (astronomical); sequential estimation; spatial filters; adaptive RFI suppression; adaptive spatial filtering; astronomical sources; calibration; deconvolution; radioastronomical imaging; sequential estimation; Array signal processing; Deconvolution; Delay; Earth; Equations; Extraterrestrial measurements; Filtering; Pollution measurement; Radiofrequency interference; Telescopes;

fLanguage

English

Publisher

ieee

Conference_Titel

Image Processing, 2001. Proceedings. 2001 International Conference on

Conference_Location

Thessaloniki

Print_ISBN

0-7803-6725-1

Type

conf

DOI

10.1109/ICIP.2001.958194

Filename

958194