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终端系统作为射电望远镜的组成部分,将接收机放大的射电信号作为输入,功能是实现射电信号的数字化和信号处理,并将处理后的数据送入存储设备.数字终端已替代模拟终端成为射电望远镜的标准配置,多功能数字终端系统日趋完善.硬件平台包括现场可编程门阵列(Field-Programmable Gate Array,FPGA)、图形处理器(Graphics Processing Unit,GPU)、中央处理器(Central Processing Unit,CPU)和集成众核(Many Integrated Core.MIC)等,为数字终端的研制提供了丰富选择.计划在新疆奇台建设的110 m射电望远镜(QiTai Radia Telescope,QTT)设计了L,S,C,K波段宽带/超宽带单波束接收机,L波段相控阵馈源(Phased Array Feed,PAF)和Q,W波段传统多波束接收机,需研制匹配的超宽带数字终端系统.本文在综述了射电望远镜终端系统的发展和国内外现状基础上,构思和讨论了采用开放FPGA平台+GPU集群为基础的QTT终端系统的设计方案和研制思路.
As an integral part of the radio telescope, the terminal system uses the amplified radio signal of the receiver as input to realize the digitization and signal processing of the radio signal and send the processed data to a storage device. The digital terminal has replaced the analog terminal as a radio telescope , The multi-function digital terminal system is getting more and more perfect.Hardware platforms include Field-Programmable Gate Array (FPGA), Graphics Processing Unit (GPU), Central Processing Unit (CPU) ) And Many Integrated Core (MIC), providing a great choice for the development of digital terminals. The QiTai Radia Telescope (QTT) is planned to construct L, S, C, K-band broadband / UWB single-beam receiver, L-band phased array feed (PAF) and Q, W band traditional multi-beam receiver, to develop a matching UWB digital terminal system.In this paper, Based on the development of radio telescope terminal system and the status quo at home and abroad, the design of QTT terminal system based on open FPGA platform + GPU cluster is conceived and discussed Case and research ideas.