L-band RFI Measurement and Mitigation at the NSRT Site

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	L-band RFI Measurement and Mitigation at the NSRT Site
	Liu Qi; Liu Ye; Chen Maozheng; Wang Yue; Liu Feng; Yan Hao; Cao Liang; Su Xiaoming
	2019
Source Publication	Acta Astronomica Sinica
ISSN	0001-5245
Volume	60 Issue:6
Abstract	Radio environment degrades significantly at Nan Shan 26 m Radio Telescope (NSRT) base due to new and upgraded electrical devices on-site and more establishment of surrounding radio communication services. How do we mitigate them effectively? Firstly, a quasi-real time Radio Frequency Interference (RFI) measurement method is employed for RFI detection and spectral analysis based on the layout for potential on-site interference areas and off-site radio communication services. Our investigation at the frequency bands for pulsar observations (1380–1700 MHz) indicates that transient interferences pose the greatest impact on observations. Then we use a portable RFI measurement system for interferences hunting at the NSRT, and the typical characteristics of interferences are analyzed. Secondly, based on the RFI characteristics, main interference sources in the observation room are shielded with shielding cabinets. The results from our shielding efficiency (SE) measurement and evaluation show that these methods work effectively. Furthermore, we propose a Radio Quiet Zone (RQZ) and the regulations for NSRT to mitigate off-site RFIs.
Keyword	radio environment RFI characteristic RFI mitigation shielding efficiency
Indexed By	CSCD
Language	英语
CSCD ID	CSCD:6624049
Citation statistics
Document Type	期刊论文
Identifier	http://ir.xao.ac.cn/handle/45760611-7/6552
Collection	中国科学院新疆天文台
Affiliation	中国科学院新疆天文台
First Author Affilication	Xinjiang Astronomical Observatory, Chinese Academy of Sciences
Recommended Citation GB/T 7714	Liu Qi,Liu Ye,Chen Maozheng,et al. L-band RFI Measurement and Mitigation at the NSRT Site[J]. Acta Astronomica Sinica,2019,60(6).
APA	Liu Qi.,Liu Ye.,Chen Maozheng.,Wang Yue.,Liu Feng.,...&Su Xiaoming.(2019).L-band RFI Measurement and Mitigation at the NSRT Site.Acta Astronomica Sinica,60(6).
MLA	Liu Qi,et al."L-band RFI Measurement and Mitigation at the NSRT Site".Acta Astronomica Sinica 60.6(2019).

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