Radio Frequency Interference Mitigation at the WSRT

The sensitivity of radio astronomical stations is often limited by man-made radio frequency interference (RFI) due to a variety of terrestrial activities. An RFI mitigation subsystem (RFIMS) based on real-time digital signalprocessing is proposed here for the Westerbork Synthesis Radio Telescope bas...

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Bibliographic Details
Published in:arXiv.org 2010-10
Main Authors: Fridman, P A, Baan, W A, Millenaar, R P
Format: Article
Language:English
Subjects:
Astronomy
Field programmable gate arrays
Microprocessors
Radio astronomy
Radio frequency
Radio frequency interference
Radio signals
Radio telescopes
Signal processing
Subsystems
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Summary:The sensitivity of radio astronomical stations is often limited by man-made radio frequency interference (RFI) due to a variety of terrestrial activities. An RFI mitigation subsystem (RFIMS) based on real-time digital signalprocessing is proposed here for the Westerbork Synthesis Radio Telescope based on a powerful field programmable gate array processor. In this system the radio astronomy signals polluted by RFI are "cleaned" with the RFIMS before routine back-end correlation processing takes place. The high temporal and frequency resolution of RFIMS allows the detection and excision of RFI better than do standard radio telescope back-end configurations.
ISSN:2331-8422
DOI:10.48550/arxiv.1010.2771