학술논문
Interference mitigation with a modified ASKAP phased array feed on the 64m parkes radio telescope
Document Type
Conference
Author
Source
2017 International Conference on Electromagnetics in Advanced Applications (ICEAA) Electromagnetics in Advanced Applications (ICEAA), 2017 International Conference on. :948-951 Sep, 2017
Subject
Language
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.