Minimax optimum joint frequency and phase recovery in IEEE 1588

Minimax optimum joint frequency and phase recovery in IEEE 1588
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IEEE 1588 中的 Minimax 最佳联合频率和相位恢复

DOI:
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发表时间:
2015
期刊:
China Summit and International Conference on Signal and Information Processing
影响因子:
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通讯作者:
Mark Bordogna
Mark Bordogna
中科院分区:
--
文献类型:
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作者:
Anand Guruswamy;Rick S. Blum;S. Kishore;Mark Bordogna

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在 IEEE 1588 精确时间协议 (PTP) 中,由于数据包交换网络固有的端到端延迟的随机性,必须将数据包时间戳恢复时钟频率和相位建模为统计估计问题。最近,作者提出了一种新的用于相位偏移估计的极小极大最优估计器。这种方法假设从时钟已经可以实现完美的频率同步。在本文中,我们表明,当无法实现完美的频率同步时,可以扩展该估计器以联合估计时钟相位和频率偏移。这些估计器的均方误差可用于获得此类场景中同步精度的基本限制。仿真结果表明,所提出的估计器比传统的频率和相位估计技术具有显着的性能优势。
In the IEEE 1588 Precision Time Protocol (PTP), the recovery of clock frequency and phase from packet timestamps must be modeled as a statistical estimation problem, due to the random nature of end-to-end delays that is inherent to packet-switched networks. Recently, a new minimax optimum estimator for phase offset estimation was proposed by the authors. This approach assumes that perfect frequency synchronization is already available at the slave clock. In this paper, we show that when perfect frequency synchronization is unavailable, this estimator can be extended to jointly estimate clock phase and frequency offsets. The mean squared error of these estimators can be used to obtain fundamental limits on synchronization accuracy in such scenarios. Simulation results indicate that the proposed estimators provide significant performance benefits over conventional frequency and phase estimation techniques.
用于 IEEE 1588 同步的采样模式数据包延迟变化滤波器
DOI: 10.1109/itst.2012.6425166
发表时间: 2012
期刊: --
影响因子: --
作者:
Anyaegbu M
通讯作者: Anyaegbu M