MULTIPATH RESOLUTION USING A ROTATABLE DUAL-POLARIZATION ANTENNA FOR DIRECTION FINDING

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Authors
  1. Teany, L.D.
Corporate Authors
Carleton Univ, Ottawa ONT (CAN);Defence Research Establishment Ottawa, Ottawa ONT (CAN)
Abstract
The attainable accuracy of current direction finding (DF) systems is limited, primarily due to the wavefront distortion resulting from multipath (MP) propagation. A technique which exploits the polarization content of a wavefront is proposed in this thesis, as a means of obtaining more accurate measurements of direction-of-arrival (DOA) bearings. In this effort, a rotatable dual-polarization VHF direction finding antenna has been designed and fabricated, to measure the polarization diversity of a signal wavefront. Its operation is based upon a null-steering amplitude comparison technique. The antenna was tested in a controlled set of MP field measurements, and the experimental results were analyzed using a proposed DF correlation technique. Results indicate that this technique appears feasible for the estimation of transmitter bearings, in scenarios involving a single specular MP signal.
Report Number
DOE-90-09 — Contractor Report (Final); Technical Report
Date of publication
15 Dec 1990
Number of Pages
167
DSTKIM No
91-02440
CANDIS No
69638
Format(s):
Hardcopy;Originator's fiche received by DSIS;Document Image stored on Optical Disk

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