MULTIPATH MEASUREMENT AND MODELLING

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Authors
  1. Litva, J.
  2. Lai, L.
Corporate Authors
McMaster Univ, Hamilton ONT (CAN) Communications Research Lab;Defence Research Establishment Ottawa, Ottawa ONT (CAN)
Abstract
Studies the effects of multipath on a direction finding (DF) system. An advanced eight-element DF system has been developed based on digital beamforming technology. The system was used to collect field trial data. The measurement trials included system calibration, single-source and two-source measurements in the presence of specular multipath environment generated by a known object. A database was established, on which the analysis of the multipath effects was based. A number of data calibration techniques have been investigated: Ho's array calibration algorithm, Friedlander-Weiss's self calibration algorithm, and calibration based on reference data. Ho's technique exhibited a slow rate of convergence. Friedlandedr-Weiss's technique gives good estimates and converges at a faster rate. The third calibration method also produced accurate estimates. A preliminary analysis of the data was carried out. For single source, DOA estimates showed very good accuracy. Beam patterns were seen to be reasonably close to those predicted theoretically. A large deviation in DOA was observed in the presence of specular multipath. It is believed that this effect was caused by the glint phenomena.
Report Number
CRL-255 — Contract Report (Final)
Date of publication
01 Jul 1992
Number of Pages
78
DSTKIM No
95-00935
CANDIS No
148381
Format(s):
Hardcopy;Document Image stored on Optical Disk

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