北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2015, Vol. 38 ›› Issue (6): 74-80.doi: 10.13190/j.jbupt.2015.06.016

• 研究报告 • 上一篇    下一篇

地基大型望远镜数字通信系统软件设计

陈璐1,2, 王建立1, 贾建禄1, 马鑫雪1   

  1. 1. 中国科学院 长春光学精密机械与物理研究所, 长春 130033;
    2. 中国科学院大学, 北京 100039
  • 收稿日期:2015-02-21 出版日期:2015-12-28 发布日期:2015-12-01
  • 作者简介:陈璐(1990—),女,博士生,E-mail:glc815@126.com;王建立(1971—),男,研究员.
  • 基金资助:

    国家高技术研究发展计划(863计划)项目(2009AA8080603)

Communication Software System for Large Ground-Based Telescope

CHEN Lu1,2, WANG Jian-li1, JIA Jian-lu1, MA Xin-xue1   

  1. 1. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China;
    2. University of Chinese Academy of Sciences, Beijing 100039, China
  • Received:2015-02-21 Online:2015-12-28 Published:2015-12-01

摘要:

针对地基大型望远镜数字通信系统信号种类杂、传输距离长、相互干扰强、实时性要求高等特点,在已有的硬件平台上,建立了基于现场可编程门阵列的数字通信软件系统. 该系统主要具有基于光纤的实时通信、数据的解码、同步存储、大容量数据的融合与转换等功能. 经实验验证,该系统最多可实现256路RS422数据和256路TTL电平信号同时在单根光纤上传输,最大发送延时约为2.4 μs;可同时生成7种不同频率的同步信号,最大延时不超过10 μs;时间空间对齐技术中,时间精度为10 μs,空间读取延时约为114 μs. 整个数字通信软件系统通信稳定可靠,符合实时性要求,满足地基大型望远镜的工作需求.

关键词: 现场可编程门阵列, 信号处理, 数字通信系统, 光纤通信

Abstract:

For the characteristics such as data classes' variety, transmitting long distance, strong disturbed and strict real-time of the ground-based high resolution photoelectric imaging telescope communication, a communication software system based on field programmable gate arraywas built on the existed hardware platform. According to the telescope, the software system must have functionsas real-time signal processing based on fiber transmission, code and decode of data, synchronous memory, data fusion and transformation. Experiment indicates that the system can transfer 256 channels of RS422 and 256 transistor transistor logicsignals through fiber in one time, longest delay is 35μs; the system also can generate 7 synchronous signals, longest delay is less than 10μs; during the spatial and time information align, time delay is 10μs, spatial delay is 114μs. The whole communication software system has right logic, safe transmission, high real-time characteristic, fits the large ground-based high resolution photoelectric-imaging telescope well.

Key words: field programmable gate array, signal progress, digital communication system, fiber transmission

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