Research on a Multi-source RFI Mitigation Algorithm Using a Reference Antenna Array

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外文摘要：We propose a multi-source radio frequency interference(RFI)mitigation method based on a reference antenna array to address the challenge of RFI from multiple directions in radio observation equipment.It introduces a sampling point correction technique using a multi-channel parallel cross-correlation computation method,enhancing the effectiveness of frequency domain adaptive RFI fast mitigation algorithms.The design implements an RFI component detection method based on cross-correlation coefficient thresholds to effectively reduce new interference frequency components introduced by the reference antenna array.Simulated RFI signals and baseband signals of pulsar J0332+5434 observed by the Nanshan 26 m Radio Telescope(NSRT)were used to test the algorithm proposed in this paper.Simulation results demonstrate that the simulated radio telescope signals after RFI mitigation closely match the original pulsar data in profile and phase,confirming the effectiveness of the proposed method.

外文关键词：

methods:data analysistechniques:interferometric(stars:)pulsars:individual

作者：

Han Wu、Hai-Long Zhang、Ya-Zhou Zhang、Jie Wang、Xin-Chen Ye、Xu Du、Ting Zhang

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作者单位：

Xinjiang Astronomical Observatory,Chinese Academy of Sciences,Urumqi 830011,China

University of Chinese Academy of Sciences,Beijing 100049,China

Key Laboratory of Radio Astronomy,Chinese Academy of Sciences,Nanjing 210008,China

National Astronomical Data Center,Beijing 100101,China

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出版年：

2024

DOI：

10.1088/1674-4527/ad86a9

天文和天体物理学研究

中国科学院国家天文台

天文和天体物理学研究

CSTPCD

影响因子：0.406

ISSN：1674-4527

年,卷(期)：2024.24(11)