星载CCD图像数据高速可靠性传输接口设计  

Design of high-speed and reliable transmission interface for spaceborne CCD image data

作　　者：陈云坤 赵欣[2] 邱晓晗 林方[1,2] 毋路遥 Chen Yunkun;Zhao Xin;Qiu Xiaohan;Lin Fang;Wu Luyao(University of Science and Technology of China,Hefei 230026,China;Key Laboratory of Environmental Optics and Technology,Anhui Institute of Optics and Fine Mechanics HFIPS,Chinese Academy of Sciences,Hefei 230031,China)

机构地区：[1]中国科学技术大学,合肥230026 [2]中国科学院合肥物质科学研究院安徽光学精密机械研究所环境光学与技术重点实验室,合肥230031

出　　处：《电子测量技术》2024年第7期34-41,共8页Electronic Measurement Technology

基　　金：国家重点研发计划项目(2022YFB3904805)资助。

摘　　要：随着高分辨率卫星载荷CCD相机的分辨率越来越高,其获取的图像数据量急剧增加,如何将载荷数据高速可靠地传输至后端设备处理是必须解决的问题。本文在高速串行接口芯片TLK2711和同源时钟的基础上进行研究,针对星载TLK2711在高速数传链路中可能出现的传输误码等问题进行分析,提出了一种基于低复杂度CRC算法的高速数传接口设计,分别从硬件和逻辑两个方面进行高速数传的可靠性分析。硬件方面基于同源时钟,在发送端和接收端对FPGA和TLK2711提供参考时钟,逻辑方面通过FB-SC-CRC校验方法,在高速传输时为数据提供数据监测、少错纠正的技术保障,降低了数据传输时的资源消耗。经试验验证,通过使用同源时钟,该数传接口实现了可靠的数据传输,码率可达1600 Mbit/s,误码率约为0,逻辑资源使用比传统CRC降低了约2/3。With the increasing resolution of high-resolution satellite payload CCD cameras,the amount of image data they obtain has sharply increased.How to transmit payload data to backend devices for processing at high speed and reliability is a problem that must be solved.This article conducts research on the high-speed serial interface chip TLK2711 and the same source clock,and analyzes the transmission errors and other issues that may occur in the high-speed data transmission link of the onboard TLK2711.A high-speed data transmission interface design based on the low complexity CRC algorithm is proposed,and the reliability analysis of high-speed data transmission is carried out from both hardware and logic aspects.In terms of hardware,it is based on the same origin clock,providing reference clocks for FPGA and TLK2711 at the sending and receiving ends.In terms of logic,it uses the FB-SC-CRC verification method to provide technical support for data monitoring and error correction during high-speed transmission,reducing resource consumption during data transmission.Through experimental verification,the data transmission interface has achieved reliable data transmission through the use of homologous clocks,with a bit rate of up to 1600 Mbit/s and an error rate of 0.The use of logical resources has been reduced by about 2/3 compared to traditional CRC.

关 键 词：高速串行传输 TLK2711 CRC校验 低误码率 

分 类 号：TN4[电子电信—微电子学与固体电子学]