Bench Top VDES Prototype - Software Defined Radio Team 2028 Bridget Kennedy Brittany Smith Matthew Sodoski Sponsor : Irene Gonin at the US Coast Guard Research and Development Center Advisor: Liang Zhang
Talk Outline ● Project Overview ● Approach ● Design Specifications ● Constraints ● Management ● Timeline
Project Overview ● Create a VDES system that can be used by the Coast Guard ● Software Defined Radio ● Benchtop Model Using USRP
Background ● AIS - Automatic Identification System - Created in the 1990s - Collision Prevention ● Coast Guard - Created on August 4th, 1709 - Enforces the Laws of Sea
Approach Hardware ● Radios in SDR Lab ● AIS → ASM → VDE ● Starting with transmitter Software ● Open-source ● GNU Radio Companion ○ Python/C++ blocks
AIS - Automatic Identification System ● Ship ID, Position, Course, Speed ● 9.6 kb Gaussian Minimum Shift Keying (GMSK) ● High Data Link Layer ● 2250 time slots established every 60 seconds ● 20 Nautical Miles
ASM - Application Specific Message ● Build off of AIS ● Weather ● Sea Level ● Safety Concerns ● IALA ASM
VDE - Very High Frequency Data Exchange ● Satellite and Terrestrial ● Graphical Information ● Global Maritime Distress and Safety System Requirements ● World Radiocommunication Conference
Constraints ● Budget ● Lack of Knowledge ○ SDRs are expensive! ○ We have limited ● Lack of VDE Info knowledge on SDRs ● Time ● Sponsor Location
Project Management - RACI Chart
Overview ● Create VDES with SDR ○ AIS ○ ASM ○ VDE ● Currently learning how to use the SDR software
Questions??
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