Overview of Technical Approaches to RFI Mitigation

Details Overview of Technical Approaches to RFI Mitigation Overview of Technical Approaches to RFI Mitigation

2005-02-16

arxiv.org/abs/astro-ph/0502310v1

Astronomy and Astrophysics

Astrophysics

Radio Science, in press. 11 pages, 9 figures

Scientific paper

This overview provides an interface between lines of thought on 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 others' 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.

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