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arXiv · 1706.04292

Interference Mitigation with a Modified ASKAP Phased Array Feed on the 64 m Parkes Radio Telescope

A. P. Chippendale·G. Hellbourg
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Abstract

We present results from a first attempt to mitigate radio frequency interference in real-time during astronomical measurements with a phased array feed on the 64 m Parkes radio telescope. Suppression of up to 20 dB was achieved despite errors in estimating the interference spatial signature. Best results were achieved in the clean excision of a narrowband and stationary clock signal that originates from the receiver's digital back-end system. We also contribute a method to interpolate valid beamformer weights at interference-affected channels. Correct initial beam weights are required to avoid suppressing the desired signal.

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A. P. Chippendale, G. Hellbourg. 2017-06-14. Interference Mitigation with a Modified ASKAP Phased Array Feed on the 64 m Parkes Radio Telescope. https://doi.org/10.1109/iceaa.2017.8065413

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