Satellite-based AIS receiver for dense maritime zones

Abstract

A satellite-based Automatic Identification System (S-AIS) receiver has a high probability of message collisions, both in time and in frequency, for a zone densely populated by AIS-enabled ships. Banks of time-and-frequency selective detectors (that use message fields from un-collided messages from the same ship-track together with interference cancellation) decode collided messages. Algorithms are suited for on-board processing, with enhanced message and ship detection probability.