基于FPGA终端的射频干扰平台化测试及台址防护技术

项目名称： 基于FPGA终端的射频干扰平台化测试及台址防护技术

项目编号： No.11473061

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 天文学、地球科学

项目作者： 刘奇

作者单位： 中国科学院新疆天文台

项目金额： 95万元

中文摘要： 射电天文台址射频干扰（RFI）测试及防护技术的研究对射电望远镜系统电磁兼容性设计、频谱管理、屏蔽需求、接收机设计及消干扰策略等提供重要依据,具有重要的工程应用价值。 本项目针对新疆110米射电望远镜台址进行RFI测试及防护技术研究。首先，搭建基于FPGA技术的Roach II 开发平台，对开发平台兼容性进行测试；基于SKA选址RFI测试系统要求及数据处理方法，开发FPGA数据处理终端，实现台址RFI快速测试、高灵敏度测试、脉冲信号测试模式。其次，研究RFI信号的鉴别方法、脉冲信号的统计与分析方法，对大量的测试数据进行数据处理、统计和分析和归类；开发基于测试、数据处理与分析、数据管理的平台化测试与分析软件。最后，建立结合地形特征的台址电波模型，预测台址外干扰到达射电望远镜的干扰效应，确定台址的环境电平敏感阈值；基于环境电平敏感阀值，开发设备辐射特性评估系统，实现电子设备辐射发射速测试与评估。

中文关键词： FPGA终端；射频干扰；测试；防护技术

英文摘要： A study for RFI (radio frequency interference) measurement and protection technology can give strong supports to electromagnetic compatibility designing of telescope system, spectrum management , shielding requirments , receivers designing and interference mitigation metheods, which has an important engineering significance. Based on the 110m radio telescope station of Xin Jiang, Firstly, Roach II platform is developed , and then the compatibility of the platform is tested . Based SKA RFI measurement for candidate sites and data processing methods, on which the FPGA backend is developed including the quickly testing mode, high sensitive testing mode and pulsar signal testing mode. Secondly , RFI signal identification Algorithm , statistics and analysis methods of the pulse signal is studied, then the huge testding data will be processed, statistical analyzed and classified, and the software of testing and analyzing platform is developed based on RFI tested automatic, data processing and analyzing and data management. Finally, based the topographical features of radio astronomy observory , on which the propagation model of signal is build, then the effects to the telesope of the outside interference are caculated and analyzed, and the threshold values of interference level of telesope are ensuerd. Based on the threshold values, the evaluation system of radiation properties of equipment is developed, which can do a quick and effective envalution for radiation properties of electronic devices.

英文关键词： FPGA backend;RFI;Measurement;Protection technology