地基大型望远镜数字通信系统软件设计  

Communication Software System for Large Ground-Based Telescope

作　　者：陈璐[1,2] 王建立[1] 贾建禄[1] 马鑫雪[1] 

机构地区：[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

出　　处：《北京邮电大学学报》2015年第6期74-80,共7页Journal of Beijing University of Posts and Telecommunications

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

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2.4μs;可同时生成7种不同频率的同步信号,最大延时不超过10μs;时间空间对齐技术中,时间精度为10μs,空间读取延时约为114μs.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.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.

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 

分 类 号：TN911.73[电子电信—通信与信息系统]