A Proposed RFI Intelligent Monitoring and Positioning System of FAST

As the most sensitive single-dish radio telescope, it is a great challenge for the Five-hundred-meter Aperture Spherical radio Telescope (FAST) to mitigate Radio Frequency Interference (RFI). The solutions for RFI mitigation of FAST consist of the Electromagnetic Compatibility (EMC) design and measures of the instruments, the maintenance of a Radio Quiet Zone (RQZ) and post-processing RFI removal algorithms. However, with the development around the FAST site, the radio environment has been affected and become complicated. In order to strengthen the operation and management of the FAST RQZ, a RFI intelligent monitoring and positioning system has been proposed, which focuses on monitoring, identifying, and positioning RFI sources, especially some mobile interference sources such as drones in the core zone of the RQZ with the radius of 5 km around the FAST site. The preliminary design and two key technologies including RFI intelligent identification and RFI source localization have been discussed roughly.