遥感相机快视高速可靠传输系统的设计与实现

夏巧桥; 胡正文; 张青林

doi:10.3788/OPE.20182604.0971

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遥感相机快视高速可靠传输系统的设计与实现

信息科学 | 更新时间：2020-07-05

- 遥感相机快视高速可靠传输系统的设计与实现
- Design and implementation of high speed and reliable transmission platform in fast view system
- 光学精密工程 2018年26卷第4期页码：971-979
- 作者机构：
  
  1.华中师范大学, 物理科学与技术学院, 湖北武汉 430079
  2.武汉大学, 电子信息学院, 湖北武汉 430072
- 作者简介：
  
  [ "夏巧桥(1987-), 男, 湖北咸宁人, 讲师, 博士, 2014年于武汉大学获得博士学位, 主要从事高速实时数据处理平台、LDPC等方向的研究。E-mail:xqq2947759@163.com" ]
  张青林(1983-), 男, 湖北襄阳人, 讲师, 博士, 2010年于武汉大学获得博士学位, 主要从事EDA技术、嵌入式系统、图像处理等方向的研究。E-mail:zhangqinglin@mail.ccnu.edu.cn ZHANG Qing-lin, E-mail:zhangqinglin@mail.ccnu.edu.cn
- 基金信息：
  
  国家自然科学基金青年科学基金资助项目(61501334);华中师范大学中央高校基本科研基金资助项目(CCNU16A05028)
- DOI：10.3788/OPE.20182604.0971
  中图分类号： TN929.13;TN911.72
- 收稿日期：2017-06-23，
  
  录用日期：2017-8-31，
  
  纸质出版日期：2018-04-25
- 稿件说明：
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夏巧桥, 胡正文, 张青林. 遥感相机快视高速可靠传输系统的设计与实现[J]. 光学精密工程, 2018,26(4):971-979.

Qiao-qiao XIA, Zheng-wen HU, Qing-lin ZHANG. Design and implementation of high speed and reliable transmission platform in fast view system[J]. Optics and precision engineering, 2018, 26(4): 971-979.
夏巧桥, 胡正文, 张青林. 遥感相机快视高速可靠传输系统的设计与实现[J]. 光学精密工程, 2018,26(4):971-979. DOI： 10.3788/OPE.20182604.0971.

Qiao-qiao XIA, Zheng-wen HU, Qing-lin ZHANG. Design and implementation of high speed and reliable transmission platform in fast view system[J]. Optics and precision engineering, 2018, 26(4): 971-979. DOI： 10.3788/OPE.20182604.0971.

摘要

针对遥感相机数据输出速率较高、快视系统传输带宽不足的问题，提出了一种基于万兆网的高速可靠传输系统并加以实现。传输系统前端采用FPGA作为主控制器，在其内部构建可靠传输协议栈，通过确认重传算法实现高速数据的UDP可靠传输，并通过流量控制机制提高传输效率。由于重传算法需消耗较多缓存资源，采用DDR3多端口控制器对传输协议栈中已发送但未被确认的数据帧进行缓存，同时对前端高速数据流进行速率平滑，减少FPGA片上RAM资源使用率。实验结果表明：当上位机CPU负载较小时，传输系统可可靠传输高达1 000 MB/s的连续数据流；当CPU负载较大时，传输速率亦在600 MB/s以上。系统传输速率高，工作稳定，扩展性强，已成功应用于遥感相机快视系统中，为超高速遥感相机的研制测试提供了保障。

Abstract

Aiming at the problem of the high data rate of remote sensing satellite cameras and the insufficient transmission bandwidth of fast view system

a new high speed reliable transmission system based on 10 Gb/s Ethernet was proposed and performed. The front end of the transmission system adopted FPGA as the main control unit that constructed the reliable transmission protocol stack. The transmission system achieved the reliable transmission for high speed data stream by ack-resend algorithm and flow control in application layer. The DDR3 multi-port front end was used to cache the frames that had been sent but not acknowledged at the transmission protocol stack due to that retransmission algorithm needed to consume more cache resources. The high speed data stream of the front end was smoothed at the same time. Experiment results indicate that the transmission system can transform reliable high speed data stream up to 1000 MB/s when the CPU load is small; When CPU load is heavy

the speed reduces to 600 MB/s. This system works at high speed with reliable performance

and costs low

and it is easy to expand to multi-channel transmission system. It has been successfully applied in a fast view system.

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references

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