VHF Propagation Study

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Authors
  1. Green, D.
  2. Fowler, C.
  3. Power, D.
  4. Tunaley, J.K.E.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN);London Research and Development Corp, London ONT (CAN);C-Core - St. John's, NL (CAN)
Abstract
This literature review provides DRDC researchers with information related to the propagation of VHF signals, particularly as it relates to the fluctuating limits of Automatic Identification System (AIS) message reception. The review focuses on the AIS frequency range and the factors that influence signal propagation in Maritime environments. The approach taken was consultation with classical textbooks on propagation to capture fundamental equations, followed by a search of the literature for papers involving VHF propagation of AIS signals. Three effects were determined to most likely extend the range of AIS transmission: diffraction over the sea around the curvature of the earth, ducting resulting from the varying refractivity of air, and multipath effects.

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Report Number
DRDC-ATLANTIC-CR-2011-152 — Contractor Report
Date of publication
01 Sep 2012
Number of Pages
66
DSTKIM No
CA036248
CANDIS No
536269
Format(s):
Electronic Document(PDF)

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