Abstract
This paper focuses on the radio direction finding (DF) in multipath
environments. Based on the measurement results presented in the open
literature, the authors analyse the influence of environment transmission
properties on the spread of the signal reception angle. Parameters that
define these properties are rms delay and angle spreads. For these
parameters, the mutual relationship is determined. This relationship is
the basis for assessment of the required number of bearings that minimize
the influence of the environment on the accuracy of DF procedure. In the
presented analysis, the statistical properties of the signal reception
angle are approximated by the normal distribution. The number of bearings
versus the rms delay spread is presented as the main objective of this
paper. In addition, a methodology of the bearings’ spatial averaging that
provides better estimation of the reception angle is shown.
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