Abstract
For ensuring the information of position, navigation and timing (PNT) to the voyage of marine vessel, International Maritime Organization (IMO) recommended Automatic Identification System (AIS) as an alternative system for global navigation satellite system (GNSS). A network of known position shore-based stations is used to estimate the position of the shipborne station based on measuring the propagation period of AIS signal from shore-based station to the shipborne station. The propagation time is determined by the time of arrival (TOA) method or time difference of arrival (TDOA). In this paper, the TDOA method is applied to estimate the position of the shipborne station using AIS signals. The lower bound of measured position error is also resolved by Cramer-Rao Lower Bound (CRLB). The simulation results show the performance assessment of TDOA in this scenario and acceptable errors show that this TDOA method could be applied for positioning the marine vessel.
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