Performance prediction of a synchronization link for distributed aerospace wireless systems.

Performance prediction of a synchronization link for distributed aerospace wireless systems.
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分布式航空航天无线系统同步链路的性能预测

DOI:
10.1155/2013/159742
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发表时间:
2013
影响因子:
--
通讯作者:
Shao H
Shao H
中科院分区:
其他
文献类型:
--
作者:
Wang WQ;Shao H

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由于隐身和其他操作优势的原因,分布式航空航天无线系统近年来受到了广泛关注。在分布式航空航天无线系统中,由于发射机和接收机放置在使用独立主振荡器的分离平台上,因此不会像单基地情况那样消除低频相位噪声。因此,分布式无线系统需要高精度的时间和频率同步技术。本文研究了使用专用同步链路来量化和补偿振荡器频率不稳定性。利用相位噪声的数学统计模型,推导出同步链路性能的解析表达式。量化了可能的误差贡献,包括振荡器,锁相环和接收机噪声。链路同步性能的预测,利用知识的统计模型,系统误差的贡献,和采样的考虑。仿真结果表明,该专用同步链路可以实现有效的同步误差补偿。
For reasons of stealth and other operational advantages, distributed aerospace wireless systems have received much attention in recent years. In a distributed aerospace wireless system, since the transmitter and receiver placed on separated platforms which use independent master oscillators, there is no cancellation of low-frequency phase noise as in the monostatic cases. Thus, high accurate time and frequency synchronization techniques are required for distributed wireless systems. The use of a dedicated synchronization link to quantify and compensate oscillator frequency instability is investigated in this paper. With the mathematical statistical models of phase noise, closed-form analytic expressions for the synchronization link performance are derived. The possible error contributions including oscillator, phase-locked loop, and receiver noise are quantified. The link synchronization performance is predicted by utilizing the knowledge of the statistical models, system error contributions, and sampling considerations. Simulation results show that effective synchronization error compensation can be achieved by using this dedicated synchronization link.
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发表时间: 1966-01-01
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