Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004smra.conf..237r&link_type=abstract
Spectrum Management for Radio Astronomy, Proceedings of the IUCAF summer school Held at Green Bank, West Viginia, June 9-14, 200
Astronomy and Astrophysics
Astronomy
Scientific paper
Radio frequency interference (RFI) is increasingly affecting radio astronomy research. A few years ago, active research to investigate the possibility of observing in the presence of interference using RFI mitigation techniques was initiated. In this paper, I briefly discuss four RFI mitigation/excision projects. These projects are:- (1) A technique to suppress double sideband amplitude modulated interference in which I show that an astronomical signal in the presence of a DSB interference can be observed with a signal-to-noise ratio factor of 2 less compared to observations if the RFI were not present. (2) Techniques to suppress interference due to synchronization signals in composite video signals are presented. A combination of noise-free modelling of the synchronization signals and adaptive filtering is used for suppressing the interference. (3) Design techniques to minimize spurious pick-up at the analog input of an analog-to-digital converter are discussed. (4) Spectral RFI excision using a spectral channel weighted scheme and its application to Green Bank telescope observations are also presented.
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