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

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

机构地区：[1]Xinjiang Astronomical Observatory,Chinese Academy of Sciences,Urumqi 830011,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Key Laboratory of Radio Astronomy,Chinese Academy of Sciences,Nanjing 210008,China [4]National Astronomical Data Center,Beijing 100101,China

出　　处：《Research in Astronomy and Astrophysics》2024年第11期167-180,共14页天文和天体物理学研究（英文版）

基　　金：supported by the National Key R&D Program of China Nos.2021YFC2203502 and 2022YFF0711502;the National Natural Science Foundation of China(NSFC,grant Nos.12173077,12073067);the Tianshan Talent Project of Xinjiang Uygur Autonomous Region(2022TSYCCX0095 and2023TSYCCX0112);the Scientific Instrument Developing Project of the Chinese Academy of Sciences,grant No.PTYQ2022YZZD01;China National Astronomical Data Center(NADC);the Operation,Maintenance and Upgrading Fund for Astronomical Telescopes and Facility Instruments,budgeted from the Ministry of Finance of China(MOF)and administrated by the Chinese Academy of Sciences(CAS);Natural Science Foundation of Xinjiang Uygur Autonomous Region(2022D01A360)。

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.

关 键 词：methods data analysis techniques INTERFEROMETRIC (stars:)pulsars individual 

分 类 号：P145.6[天文地球—天体物理]