Spatial filtering of RF interference in radio astronomy
- 7 August 2002
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Signal Processing Letters
- Vol. 9 (2) , 64-67
- https://doi.org/10.1109/97.991140
Abstract
We investigate spatial filtering techniques for interference removal in multichannel radio astronomical observations. The techniques are based on the estimation of the spatial signature vector of the interferer from short-term spatial covariance matrices followed by a subspace projection to remove that dimension from the covariance matrix, and by further averaging. The projections will also modify the astronomical data, and hence a correction has to be applied to the long-term average to compensate for this. As shown by experimental results, the proposed technique leads to significantly improved estimates of the interference-free covariance matrix.Keywords
This publication has 7 references indexed in Scilit:
- A change point detection method for elimination of industrial interference in radio astronomy receiversPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- RFImitigation methods in radio astronomyAstronomy & Astrophysics, 2001
- Removing Radio Interference from Contaminated Astronomical Spectra Using an Independent Reference Signal and Closure RelationsThe Astronomical Journal, 2000
- Multichannel Interference Mitigation Techniques in Radio AstronomyThe Astrophysical Journal Supplement Series, 2000
- Radio-astronomical imaging in the presence of strong radio interferenceIEEE Transactions on Information Theory, 2000
- Cancellation of GLONASS signals from radio astronomy dataPublished by SPIE-Intl Soc Optical Eng ,2000
- Spectral detector for interference time blanking using quantized correlatorAstronomy and Astrophysics Supplement Series, 1997