Spectral detector for interference time blanking using quantized correlator

Details Spectral detector for interference time blanking using quantized correlator Spectral detector for interference time blanking using quantized correlator

Nov 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26as..126..161w&link_type=abstract

A & A Supplement series, Vol. 126, November II 1997, 161-167.

Astronomy and Astrophysics

Astronomy

9

Instrumentation: Miscellaneous, Methods: Data Analysis, Techniques: Spectroscopic

Scientific paper

Given the large flow of data to be processed, quantized correlators are widely used in radio astronomy. Unfortunately, the occurrence of non-Gaussian interference combined with a coarse quantization can strongly alter the shape of the estimated spectra. The final spectral estimation can be preserved by blanking the correlator in real-time. A new interference detection criterion is proposed within this framework. It uses the real-time capabilities of correlators and compares contaminated and non-contaminated correlation functions. No a priori information on the interfering signals is required. Simulations, using synthetic and actual data, are presented. This new technique of real time detection can significantly improve the quality of spectral line observations.

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