星载高速串行数据处理系统设计与实现

宋景星; 朱岩; 饶家宁; 安军社

doi:10.11728/cjss2023.01.220112005

星载高速串行数据处理系统设计与实现

doi: 10.11728/cjss2023.01.220112005

宋景星^{1, 2,},
朱岩¹,
饶家宁¹,
安军社¹

1.
中国科学院国家空间科学中心复杂航天系统电子信息技术重点实验室　北京　100190
2.
中国科学院大学　北京　100049

基金项目: 国家重点研发计划项目资助（2022YFF0503903）

详细信息

作者简介:
宋景星：E-mail：jxsong@nssc.ac.cn

中图分类号: V476.9
计量
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- PDF下载量: 36
- 被引次数: 0
出版历程
- 收稿日期: 2022-01-11
- 录用日期: 2022-06-15
- 修回日期: 2022-11-03
- 网络出版日期: 2023-02-04

Design and Implement of High-speed Receiving Cache System of the Satellite

1.
Key Laboratory of Electronics and Information Technology for Space Systems, National Space Science Center,Chinese Academy of Sciences, Beijing 100190
2.
University of Chinese Academy of Sciences, Beijing 100049

摘要

摘要: 遥感卫星图像数据量的高速增长，以及遥感卫星搭载的相机不同工作模式下产生的数据差异化处理的需求，为星间数据处理带来了巨大挑战。针对星载Gbit·s^–1级高速数据收发及文件缓存等星间数据处理面临的问题，以百兆每秒级星载高速接收缓存系统为切入点，以遥感卫星数据处理的发展为依据，在分析SerDes传输原理的基础上，采用模型仿真和工程验证的方法，制定了高速串行数据链路层传输协议SSLLP（Satellite Serial Link Layer Protocol）和类文件化高速缓存的策略。在硬件设计和软件开发的基础上，最终完成了具备处理入口速率3.2 Gbit·s^–1并能以类文件化的方式缓存64个数据文件的星载数据处理单元的工程实现。测试结果表明，基于SSLLP的高速串行数据接收正确，缓存策略有效，系统高效可靠。该设计已在某型号任务中取得在轨验证，为星载高速串行数据处理系统提供了参考。
- 星载 /
- 高速串行总线 /
- 数据处理
Abstract: Recently with the development of space technology, the explosive growth of remote sensing satellite image data and the demand for multi-mode operation of a remote sensing satellite camera, have produced the differential processing of different data. At the same time, it also has brought great challenges for inter-satellite data processing. The purpose of this research is to solve the problems of inter-satellite data processing, such as gigabits per second high-speed data transceiver, datas storage, file cache and so on. This study investigates the development of remote sensing satellite data processing, analyzes the transmission principle of SerDes, and formulates the operation strategy of documented class of high-speed cache. Based on hardware design and software development, the project of high-speed space-borne data processing unit with 3.2 bit·s^–1 level and 64 data documents is completed. The test results show that based on SSLLP (Satellite Serial Link Layer Protocol), the high-speed serial data reception is correct and the cache strategy is effective. Most important of all, the system is efficient and reliable. This design has been applied to some on-orbit model missions, providing a reference to the design of high-speed receiving cache system of the satellite.
- Space-borne /
- High speed serial bus /
- Data processing

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图 1 数据处理系统结构

Figure 1. Data processing system structure

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图 2 SerDes传输帧格式

Figure 2. Format of transmission frame of SerDes

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图 3 SerDes传输流程

Figure 3. Transmission flow chart of SerDes

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图 4 DDR2模块设计架构

Figure 4. Architecture of DDR2 module design

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图 5 硬件设计

Figure 5. Design of hardware

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图 6 仿真结构设计

Figure 6. Design of simulation structure

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图 7 高速串行接口接收数据（1）

Figure 7. Receiving data of SerDes(1)

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图 8 高速串行接口接收数据（2）

Figure 8. Receiving data of SerDes(2)

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图 9 DDR2写过程（1）

Figure 9. Write process of DDR2(1)

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图 10 DDR2写过程（2）

Figure 10. Write process of DDR2(2)

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图 11 DDR2读过程（1）

Figure 11. Reading process of DDR2(1)

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图 12 DDR2读过程（2）

Figure 12. Reading process of DDR2(2)

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表 1 眼图信息对比

Table 1. Eye diagram information comparison

Parameter	Eye width/ ps	Eye height/ mV	Eye zero/ mV	Eye one/ mV	Eye jit/ ps	Data rate/ (bit·s^–1)	Q-factor	Crossing/ (%)	DutCyc dist/(%)
Eye Display 1	435.6	970	771.4	756.9	151.3	1.60	12.2	48.6	7
Eye Display 2	452.8	1072	807.7	809	131.7	1.60	12.44	48.8	6.8

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