AIS: A Guide to System DevelopmentThoughts on AIS system design from an R&D perspective
This informative paper addresses design challenges for Automatic Identification Systems (AIS). Designed to prevent marine collisions, AIS is a marine band data network based on a self-organizing TDMA access protocol. The SOTDMA protocol poses significant hurdles for electronic designers. In this paper we discuss and clarify protocol structures and specifications, as well as architecture implementation. We present a step-by-step process for encoding or decoding AIS messages. We highlight key, system-level considerations for the data-link layer, GPS and transmit synchronization, DSC and AIS channel deviation, power challenges and testing. As well, we shed light on NMEA 0183’s frequently misconstrued terms concerning back-end interface design. We outline a new, software-defined radio approach to AIS design, developed by RF experts at Fidus Systems.
AIS: A Guide to System Development provides practical guidance for design engineers, project managers and engineering leaders in the fields of AIS, RF and software-defined radio.
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