| 摘要: |
| 针对卫星少缆化互连发展需求，提出采用超宽带（Ultra-wide Band，UWB）技术构建星载无线网络替代传统有线传输方式。阐述了星载网络内部时钟与系统外部时钟的不同涵义，介绍并比较了不同机制的无线网络时间同步算法。基于UWB无线节点，采用泛洪时间同步协议（Flooding Time Synchronization Protocol，FTSP）实现无线节点网络内部与外部时钟的同步。搭建星型无线网络，在3种同步周期和4种同步时间表深度的条件下测试验证同步效果，结果表明内外部时钟的最大正负偏差可以维持在10 μs以内。 |
| 关键词: 星内无线通信 超宽带无线网络 时间同步 泛洪时间同步协议(FTSP) |
| DOI：10.20079/j.issn.1001-893x.240918001 |
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| 基金项目:某装备预研项目（3050812） |
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| High-precision Time Synchronization Technology for Onboard Ultra-wide Band Wireless Networks |
| LI Linwei,WU Kankan,ZHOU Jun,LIU Bo,WANG Shaolin,WANG Qingyi |
| (Shanghai Institute of Satellite Engineering，Shanghai 201109，China) |
| Abstract: |
| According to the demand of cable-free satellite systems，the utilization of ultra-wide band(UWB) technology is proposed to establish an onboard wireless network，effectively replacing traditional wired transmission methods.Different implications between internal clocks and external clocks are elaborated and various wireless network time synchronization algorithms are introduced and compared.The synchronization of both internal clocks and external clocks is achieved by employing the Flooding Time Synchronization Protocol(FTSP) on UWB wireless nodes.A star-shaped wireless network is built in the laboratory，and the synchronization performance is tested across three different cycles synchronization operation and four different depths of timing pairs.The results indicate that the maximum positive and negative deviations of the internal clocks and external clocks can be kept within 10 microseconds. |
| Key words: intra-satellite wireless communication UWB wireless network time synchronization flooding time synchronization protocol(FTSP) |
《电讯技术》编辑部 