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标题：RFI mitigation for the Effelsberg Bonn HI Survey (EBHIS)
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作者：L. Flöer ; B. Winkel ; J. Kerp 等
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2010
卷号：2010
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：A new L-band 7 feed array at the 100m telescope is used to perform an unbiased, fully sampled HI survey of the whole northern hemisphere – the Effelsberg-Bonn HI Survey (EBHIS). The use of state-of-the-art digital Fast Fourier Transform spectrometers based on FPGAs – superior in dynamic range and allowing fast dumping of spectra – makes it possible to apply sophisticated RFI mitigation schemes. Based on the current status of the survey we discuss the RFI situation at the 100m telescope and present a fast algorithm to automatically identify RFI in the raw data output from the spectrometer. Using simulations we show that it is feasible to detect more than 95% of all RFI in excess of 1s amplitude with less than 1% false positives.