CPC G01S 13/505 (2013.01) [G01S 7/282 (2013.01); G01S 13/48 (2013.01); G01S 13/89 (2013.01)] | 10 Claims |
1. A method of determining an object's distance, the method comprising:
delivering a first RF signal from a first transmitter to the object;
changing a direction of the first transmitter along both azimuth and elevation until the first transmitter reaches a first direction defined by first and second angles at which a power of a first reflected RF signal reflected off the object and received by a receiver reaches a maximum value;
delivering a second RF signal from a second transmitter to the object;
changing a direction of the second transmitter along both azimuth and elevation until the second transmitter reaches a second direction defined by third and fourth angles at which a power of a second reflected RF signal reflected off the object and received by the receiver reaches a maximum value;
determining a distance between the object and the first transmitter in accordance with a distance between the two transmitters, and the first, second, third and fourth angles;
deactivating the second transmitter while delivering the first RF signal from the first transmitter; and
deactivating the first transmitter while delivering the second RF signal from the second transmitter.
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