DIRECTION FINDING OF IONOSPHERIC SCATTERING SOURCES FOR VORTEX ANTENNA SYSTEM

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Authors
  1. To, A.
  2. Wong, M.
  3. Meng, Y.
Corporate Authors
Defence Research Establishment Ottawa, Ottawa ONT (CAN);McMaster Univ, Hamilton ONT (CAN) Communications Research Lab
Abstract
In the last few years, a library of hf measurement data has been collected to investigate the ionospheric scattering problem. When MUSIC was applied to this data, the results were quite disappointing: the estimated angles exhibit large unacceptable fluctuations. On the other hand, the Advanced Signal Processing Group under the direction of Dr. K.M. Wong has recently developed several powerful methods to estimate the DOSs of dispersed signals. Among these methods, DISPARE I, DISPARE II, MUSIC DISC and BF DISC require moderate computation load which would make them appropriate for the HF task. Additional, both theoretical calculations and computer simulations show that these methods give better estimates than MUSIC when dealing with dispersed signals. Naturally, the most logical step was to study whether these newly developed DF methods could really solve the problem of estimating DOAs of ionospheric scattering signals. This report describes, in detail, the theoretical background, the tests performed, the results obtained and the conclusions that were made.
Keywords
Distributed sources;Ionospheric scattering;MUSIC;Signal models;Antenna array
Report Number
DREO-CR-98-620 — Contractor Report (Final)
Date of publication
01 Mar 1997
Number of Pages
138
DSTKIM No
98-02851
CANDIS No
509863
Format(s):
Hardcopy;Document Image stored on Optical Disk

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