A Status Data Transmitting System for Vessel Monitoring

The Anh Nguyen Dinh (Vietnam National Space Center)
Huy Le Xuan (Vietnam National Space Center)
Tuan Anh Vu (VNU University)
Duong Bach Gia (VNU University)

International Journal of Electrical and Computer Engineering
Vol 8, No 2: April 2018

This paper presents a status data transmitting system suitable for vessel monitoring. The system consists of four main parts, which are a status data module, a frequency synthesizer, a power amplifier and a horn antenna. The status data module packs information of the identification, longitude, latitude and state of the vessel into data frames. FSK/MSK/GMSK schemes were used to modulate the data. The frequency synthesizer was designed with very high stability over temperature and very low frequency tolerance. The power amplifier provides 130 W output power at S band. The impedance bandwidth of the horn antenna can be controlled using the beveling technique.