Interference Mitigation with a Modified ASKAP Phased Array Feed on the 64 m Parkes Radio Telescope
arXiv:1706.04292 · doi:10.1109/ICEAA.2017.8065413
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.
4 pages, 6 figures, 1 table, accepted for publication in Electromagnetics in Advanced applications (ICEAA), 2017 International Conference on