德令哈13.7米望远镜实时数字FFT频谱仪  

Real-time Digital FFT Spectrometer for Delingha 13.7 m Telescope

作　　者：李振强 张旭国 李积斌 孙继先[1,2] 逯登荣[1,2] 董守豪 李亚鹏 李生学[1,2] Li Zhenqiang;Zhang Xuguo;Li Jibin;Sun Jixian;Lu Dengrong;Dong Shouhao;Li Yapeng;Li Shengxue(Qinghai Station,Purple Mountain Observatory,Chinese Academy of Sciences,Delingha 817000,China;Key Laboratory of Radio Astronomy,Chinese Academy of Sciences,Nanjing 210033,China)

机构地区：[1]中国科学院紫金山天文台青海观测站,青海德令哈817000 [2]中国科学院射电天文重点实验室,江苏南京210033

出　　处：《天文研究与技术》2022年第5期423-431,共9页Astronomical Research & Technology

基　　金：国家自然科学基金(11773084)资助.

摘　　要：射电天文频谱仪作为接收机后端的频谱分析设备,实时性和噪声低等要求与商业通用频谱仪有很大区别。射电天文频谱仪经过几代发展为以模数转换器(Analog-to-Digital Converter,ADC)和现场可编程门阵列(Field Programmable Gate Array,FPGA)等芯片为基础的实时数字频谱仪。实时数字频谱仪具有宽带宽、高频率分辨率、高动态范围和长时间稳定性等优势,更重要的是具有体积小、环境要求宽松等特点。德令哈13.7 m望远镜接收机后端有18路实时数字快速傅里叶变换(Fast Fourier Transform,FFT)频谱仪。介绍13.7 m望远镜的实时数字快速傅里叶变换频谱仪的性能和维护,为其他长时间运行的快速傅里叶变换频谱仪的维护提供经验参考,为下一代实时数字快速傅里叶变换频谱仪的发展提供了部分改进方向。In radio astronomy, as the spectrum analysis equipment at the back end of the receiver, the spectrometer is very different from the commercial general spectrum analyzer. After several generations of development, the radio astronomy spectrometer has developed into a real-time digital spectrometer based on chips such as Analog-to-Digital Converter(ADC) and Field Programmable Gate Array(FPGA). Real time digital spectrometer has the advantages of wide bandwidth, high frequency resolution, high dynamic range and long-time stability, etc., and more importantly, it has the characteristics of small volume and loose environmental requirements. There are 18 real-time digital Fast Fourier Transform(FFT) spectrometers at the back end of receivers for Delingha 13.7 m telescope. The performance and maintenance of real-time digital FFT spectrometers for 13.7 m telescope are introduced. The performance and maintenance of the real-time digital FFT spectrometers for 13.7 m telescope are introduced. These can provide experience reference for the maintenance of other long time running real-time digital FFT spectrometers, and provide partial improvement direction for the development of the next generation of real-time digital FFT spectrometers.

关 键 词：现场可编程门阵列 快速傅里叶变换 实时数字频谱仪 超导成像频谱仪 

分 类 号：P161.4[天文地球—天文学]