A FPGA-based Fast Converging Digital Adaptive Filter for Real-time RFI Mitigation on Ground Based Radio Telescopes
文献类型:期刊论文
作者 | Finger, R.1,2; Curotto, F.1,2; Fuentes, R.1,2; Duan, R.3; Bronfman, L.1; Li, D.3,4 |
刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC |
出版日期 | 2018-02-01 |
卷号 | 130期号:984页码:7 |
ISSN号 | 0004-6280 |
关键词 | instrumentation: spectrographs techniques: image processing techniques: miscellaneous |
DOI | 10.1088/1538-3873/aa972f |
通讯作者 | Finger, R.() |
英文摘要 | Radio 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. |
WOS关键词 | INTERFERENCE EXCISION ; ASTRONOMY |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP PUBLISHING LTD |
WOS记录号 | WOS:000418942400002 |
源URL | [http://libir.pmo.ac.cn/handle/332002/22133] |
专题 | 中国科学院紫金山天文台 |
通讯作者 | Finger, R. |
作者单位 | 1.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 |
推荐引用方式 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. |
入库方式: OAI收割
来源:紫金山天文台
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