| 摘要: |
| 测量船通过IRIG-B(DC)码来传输时间信息，针对传统B码时间信息传输中存在的不足
，根据SDH传输时延的确定性特点，提出基于SDH的高精度时间信息传输方案，通过SDH反向
通道环回时间信息，利用时延自适应补偿算法来抵消SDH通道传输时延。设计制作的时延补
偿设备成功应用于测量船内部时间信息传输，经过测试表明，传输后的时间信息准确度由补
偿前的数百微秒提高到补偿后的优于10 μs，远远高于系统对时间信息准
确度的要求。 |
| 关键词: 航天测量船 信息传输 SDH 传输时延 时间信息 时延补偿 |
| DOI： |
|
| 基金项目: |
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| A scheme for transmitting time code of space TT&C ship through SDH channel |
| HUANG Guo-xiong，,MA Yun-long |
| () |
| Abstract: |
| The space TT&C ship transmits time information through IRIG-B(DC) code.In view o
f the disadvantage in traditional B code time information transmission,according
to the certainty of SDH transmission delay, a novel time information transmissi
on scheme
is proposed based on SDH. In the scheme, the loopback time information by back
channel SDH is utilized, and a delay compensation device is designed to measure
the SDH transmission delay and correct delay compensation value automatical
ly in real-time. Finally, the delay compensation device is deployed in TT&C ship
to transmit time information between systems. Test shows that the accura
cy of transmission time information is better than 10 μs, much higher than that
of system requirement. |
| Key words: space TT&C ship information transmission SDH transmission delay time code information delay compensation |
《电讯技术》编辑部 