Time synchronization module for automatic identification system

This paper proposed a design and implementation procedure of the Time Synchronization Module (TSM) for the Automatic Identification System (AIS). The proposed TSM module uses a Temperature Compensated Crystal Oscillator (TCXO) as a local reference clock, and consists of a Digitally Controlled Oscill...

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Bibliographic Details
Published inWuhan University journal of natural sciences Vol. 8; no. 2; pp. 725 - 730
Main Authors Il-heung Choi, Oh, Sang-heon, Dae-soo Choi, Chan-sik, Park, Dong-hwan Hwang, Sang-jeong, Lee
Format Journal Article
LanguageEnglish
Published Heidelberg Springer Nature B.V 01.06.2003
GNSS Technology Research Center, Chungnam National University, 361-763 Korea%School of Electrical and Electronics Engineering, Chungbuk National University, 361-763 Korea
Subjects
Crystal oscillators
Global navigation satellite system
Modules
Synchronization
Time measurement
Time synchronization
Universal time
TDMA
time synchronization
AIS
GNSS
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Summary:This paper proposed a design and implementation procedure of the Time Synchronization Module (TSM) for the Automatic Identification System (AIS). The proposed TSM module uses a Temperature Compensated Crystal Oscillator (TCXO) as a local reference clock, and consists of a Digitally Controlled Oscillator (DCO), a divider, a phase discriminator, and register blocks. The TSM measures time difference between the 1 PPS from the Global Navigation Satellite System (GNSS) receiver and the generated transmitter clock. The measured time difference is compensated by controlling the DCO and the transmit clock is synchronized to the Universal Time Coordinated (UTC). The designed TSM can also be synchronized to the reference time derived from the received message. The proposed module is tested using the experimental AIS transponder set. The experimental results show that the proposed module satisfies the functional and timing specification of the AIS technical standard, ITU-R M.1371.
ISSN:1007-1202
1993-4998
DOI:10.1007/BF02899841