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A FPGA-based Fast Converging Digital Adaptive Filter for Real-time RFI Mitigation on Ground Based Radio Telescopes
Finger, R.1,2; Curotto, F.1,2; Fuentes, R.1,2; Duan, R.3; Bronfman, L.1; Li, D.3,4
2018-02-01
Source PublicationPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
ISSN0004-6280
Volume130Issue:984Pages:7
Corresponding AuthorFinger, R.()
AbstractRadio Frequency Interference (RFI) is a growing concern in the radio astronomy community. Single-dish telescopes are particularly susceptible to RFI. Several methods have been developed to cope with RF-polluted environments, based on flagging, excision, and real-time blanking, among others. All these methods produce some degree of data loss or require assumptions to be made on the astronomical signal. We report the development of a real-time, digital adaptive filter implemented on a Field Programmable Gate Array (FPGA) capable of processing 4096 spectral channels in a 1 GHz of instantaneous bandwidth. The filter is able to cancel a broad range of interference signals and quickly adapt to changes on the RFI source, minimizing the data loss without any assumption on the astronomical or interfering signal properties. The speed of convergence (for a decrease to a 1%) was measured to be 208.1 mu s for a broadband noise-like RFI signal and 125.5 mu s for a multiple-carrier RFI signal recorded at the FAST radio telescope.
Keywordinstrumentation: spectrographs techniques: image processing techniques: miscellaneous
DOI10.1088/1538-3873/aa972f
WOS KeywordINTERFERENCE EXCISION ; ASTRONOMY
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000418942400002
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22134
Collection中国科学院紫金山天文台
Corresponding AuthorFinger, R.
Affiliation1.Univ Chile, Dept Astron, Santiago, Chile
2.Univ Chile, Dept Elect Engn, Santiago, Chile
3.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China
4.Chinese Acad Sci, Key Lab Radio Astron, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Finger, R.,Curotto, F.,Fuentes, R.,et al. A FPGA-based Fast Converging Digital Adaptive Filter for Real-time RFI Mitigation on Ground Based Radio Telescopes[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,2018,130(984):7.
APA Finger, R.,Curotto, F.,Fuentes, R.,Duan, R.,Bronfman, L.,&Li, D..(2018).A FPGA-based Fast Converging Digital Adaptive Filter for Real-time RFI Mitigation on Ground Based Radio Telescopes.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,130(984),7.
MLA Finger, R.,et al."A FPGA-based Fast Converging Digital Adaptive Filter for Real-time RFI Mitigation on Ground Based Radio Telescopes".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC 130.984(2018):7.
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