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

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 to 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.

• Type: Conference
• Year: 2001
• Where: ICIP
• Authors: Amir Leshem, Alle-Jan van der Veen
• Keywords: Adaptive Spatial Filtering, ICIP 2001, Image Processing, Radio Astronomical Imaging, Spatial Filtering Techniques