Communications: directive radio wave systems and devices (e.g. – Directive – Position indicating
Patent
1992-11-27
1993-09-28
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Position indicating
343712, G01S 302
Patent
active
052489850
ABSTRACT:
In a high frequency direction finder for automotive vehicles, complex measured voltages are obtained from a plurality of antennas. Measured data sets are derived from the measured voltages from which the direction of arrival of a high frequency transmitter to be located is determined by comparison with model data sets obtained by taking into account the vehicle structure using a previously conducted calibration process. The antennas are mounted in the immediate vicinity of the vehicle body so as to be concealed from the outside. The analog received signals from the antennas are digitized and the signal to noise ratio of these digitized received signals is improved by spectral analysis. Both of the measured data sets and model data sets are obtained from received signals that have been digitized and improved by spectral analysis.
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Blum Theodore M.
Rohde & Schwarz GmbH & Co. KG
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