Positioning system with intentional multi-path signal
First Claim
1. 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 proximate to the device; 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, wherein the range is determined in accordance with a time of arrival of the return pulse and the position is determined in accordance with a time of arrival of the at least one multi-path pulse.
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Accused Products
Abstract
A positioning system includes a device, having an antenna and a reflector with a known position proximate to the antenna, that transmits at least an electromagnetic pulse having a carrier signal frequency. The device receives 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. The device processes the return signal so as to isolate the return pulse and the at least one multi-path pulse from the return signal. The device determines a range from the device to the object and the position of the device relative to the object. The range is determined in accordance with a time of arrival of the return pulse and the position is determined in accordance with a time of arrival of the at least one multi-path pulse.
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Citations
24 Claims
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1. A method of determining the position of a device, comprising:
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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 proximate to the device; 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, wherein the range is determined in accordance with a time of arrival of the return pulse and the position is determined in accordance with a time of arrival of the at least one multi-path pulse. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A positioning system, comprising a device, including an antenna and a reflector with a known position proximate to the antenna, configured to transmit at least an electromagnetic pulse having a carrier frequency, to receive a return signal over a period of time in a receiver, the return signal including a return pulse from an object within a radar detection area of the device and at least one multi-path pulse associated with the reflector, to process 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 a position of the device relative to the object,
wherein the range is determined in accordance with a time of arrival of the return pulse and the position is determined in accordance with a time of arrival of the at least one multi-path pulse.
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24. A positioning system, comprising transmit means for transmitting at least an electromagnetic pulse having a carrier frequency, receive means for receiving a return signal over a period of time, the return signal including a return pulse from an object within a radar detection area of the device means and at least one multi-path pulse produced by the device means, signal processing means for processing the return signal so as to isolate the return pulse and the at least one multi-path pulse from the return signal, and range determination means to determine a range from the device means to the object and a position of the device means relative to the object,
wherein the range is determined in accordance with a time of arrival of the return pulse and the position is determined in accordance with a time of arrival of the at least one multi-path pulse.
Specification