CONTINUOUS HIGH-ACCURACY LOCATING METHOD AND APPARATUS
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United States of America Patent
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Issued Date -
Nov 10, 2011
app pub date -
Apr 13, 2011
filing date -
Apr 22, 2010
priority date (Note) -
Abandoned
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Abstract
Method and apparatus for locating an object (2) that is to be located relative to a reference object (1), by electrically generating a locating signal (SL) by modulating a carrier signal with pseudo-noise. The modulation is continuous and of the ultra-wideband (UWB) type. Analysis using a cross-correlation function between said locating signal (SL) and received reflected signals (SRR1, SRR2) serves to segregate waves that have followed a direct path and any interfering waves that have followed indirect paths, so as to be able to deduce therefrom the shortest overall propagation time corresponding to those of said locating waves (OL) that have followed direct paths. The invention applies in particular to a rotary wing aircraft, e.g. a helicopter drone.
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