Patent ID: 7315275

Claim:
A method of determining the position of a device, comprising: transmitting at least an electromagnetic pulse having a carrier signal frequency from the device; receiving a return signal over a period of time, wherein the return signal includes a return pulse from an object within a radar detection area of the device and at least one multi-path pulse associated with a reflector at a known position relative to and proximate to the device; wherein the at least one multi-path pulse comprises at least one pulse that has been generated by both the object and the reflector; and processing the return signal so as to isolate the return pulse and the at least one multi-path pulse from the return signal and to determine a range from the device to the object and the position of the device relative to the object, including determining the range in accordance with a time of arrival of the return pulse and determining the position in accordance with a time of arrival of the at least one multi-path pulse.