RFI mitigation at Nanc¸ay Observatory: Impulsive Signal Processing

Abstract : Radio astronomy has protected frequency bands for free observations. However, it is often necessary to observe outside of those sanctuaries. For example, it is the case for HI radio-sources with high red-shifts that are observed into radarallocated frequency bands. A radar pulse blanker based on statistical analysis has been implemented in a FPGA. Several tricks has made the implementation possible at a low hardware cost. Pulsar is another kind of impulsive signal which needs specific processing. In the proposed approach, the cyclostationarity is used to discriminate between radio-frequency interference (RFI) pulses and pulsar pulses.
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Dalal Ait-Allal, Cedric Dumez-Viou, Rodolphe Weber, Grégory Desvignes, Ismaël Cognard, et al.. RFI mitigation at Nanc¸ay Observatory: Impulsive Signal Processing. S. A. Torchinsky, A. van Ardenne, T. van den Brink-Havinga, A. van Es, A.J. Faulkner. Widefield Science and Technology for the SKA SKADS Conference 2009, ISBN 978-90-805434-5-4, pp.201 - 205, 2010. ⟨hal-00647492⟩

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