A combined chirp signal time-synchronization scheme for mobile underwater sensor networks

被引：0
|
作者：
Jin Y.-L. [1 ]
Fang C.-L. [1 ]
Yao B. [1 ]
机构：
[1] Key Laboratory of Special Fiber Optics and Optical Access Networks of Ministry of Education, Shanghai University, Shanghai
来源：
Beijing Youdian Daxue Xuebao/Journal of Beijing University of Posts and Telecommunications | 2016年 / 39卷 / 01期
关键词：
Chirp signals; Doppler shift; Node mobility; Time synchronization;
D O I：
10.13190/j.jbupt.2016.01.009
中图分类号：
学科分类号：
摘要：
This article puts forward a combined chirp signal time synchronization (CCS-Sync) algorithm. In the physical layer, it uses a preamble structure combined with chirp signals to estimate the Doppler scaling factor. Furthermore, the author proposes a message exchange mechanism composed of two phases. In the phase of coarse synchronization, the reference node broadcasts messages to synchronize the ordinary nodes. Based on the first phase, it uses twice linear regression method to estimate the clock skew and offset. With this algorithm, it successfully uses the effect of Doppler between mobility nodes to reduce the synchronization error. The effectiveness of CCS-Sync is validated by the simulation. © 2016, Beijing University of Posts and Telecommunications. All right reserved.
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页码：52 / 57
页数：5
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