A Combined Chirp Signal Time-Synchronization Scheme for Mobile Underwater Sensor Networks

doi:10.13190/j.jbupt.2016.01.009

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2016, Vol. 39 ›› Issue (1): 52-57.doi: 10.13190/j.jbupt.2016.01.009

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A Combined Chirp Signal Time-Synchronization Scheme for Mobile Underwater Sensor Networks

JIN Yan-liang, FANG Chang-li, YAO Bin

1. Key Laboratory of Special Fiber Optics and Optical Access Networks of Ministry of Education, Shanghai University, Shanghai 200072, China;
2. School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China

Received:2015-06-10 Online:2016-02-28 Published:2015-12-08

Abstract

Abstract:

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.

Key words: chirp signals, time synchronization, node mobility, Doppler shift

CLC Number:

TN301.6

JIN Yan-liang, FANG Chang-li, YAO Bin. A Combined Chirp Signal Time-Synchronization Scheme for Mobile Underwater Sensor Networks[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2016, 39(1): 52-57.

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A Combined Chirp Signal Time-Synchronization Scheme for Mobile Underwater Sensor Networks

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