首页 | 本学科首页   官方微博 | 高级检索  
     检索      


L-band RFI Measurement and Mitigation at the NSRT Site
Authors:LIU Qi  LIU Ye  CHEN Mao-zheng  WANG Yue  LIU Feng  YAN Hao  CAO Liang and SU Xiao-ming
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.
Keywords:radio environment  RFI characteristic  RFI mitigation  shielding efficiency
点击此处可从《天文学报》浏览原始摘要信息
点击此处可从《天文学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号