Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005rasc...40.5s02b&link_type=abstract
Radio Science, Volume 40, Issue 5, CiteID RS5S02
Astronomy and Astrophysics
Astronomy
1
Radio Science: Electromagnetic Noise And Interference, Radio Science: Interferometry (1207, 1209, 1242), Radio Science: Radio Astronomy, Radio Science: Signal Processing (0674), Radio Science: Instruments And Techniques (1241)
Scientific paper
This overview provides an interface between lines of thought on radio frequency interference (RFI) mitigation in the fields of radio astronomy and signal processing. The goal is to explore the commonality of different approaches to help researchers in both fields interpret each other's concepts and jargon. The paper elaborates on the astronomers' concept of gain closure relations and how they may be used in a ``self-calibrating'' system of RFI cancellation. Further discussion of the eigen-decomposition method in terms of RFI power and antenna gains introduces adaptive nulling and RFI cancellation through matrix partitioning. While multipath scattering appears at first glance to be fatal to methods of RFI cancellation, its effect is easily incorporated in frequency-dependent gain coefficients under many circumstances.
Briggs Frank H.
Kocz Jonathan
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