Method and system for identifying and finding a range of an object
First Claim
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1. A method for identifying and ranging a wireless device, comprising:
- transmitting chirp radar signal from a detecting system;
in response to the chirp radar signal, receiving a modulated radar signal at the detecting system, the modulated radar signal;
(i) being backscattered from an antenna of the wireless device, (ii) containing information pertaining to the wireless device, and (iii) being a frequency offset version of the chirp radar signal;
determining an identity of the wireless device from the modulated radar signal; and
determining a range of the wireless device from the modulated radar signal, which is proportional to an instantaneous frequency difference of the modulated radar signal minus the frequency offset.
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Abstract
A method for identifying and ranging a wireless device, comprising: transmitting an original radar signal from a detecting system; in response to the original radar signal, receiving a modulated radar signal at the detecting system, the modulated radar signal being backscattered from an antenna of the wireless device and containing information pertaining to the wireless device, and the modulated radar signal being a frequency offset version of the original radar signal; and, using a processor at the detecting system, determining an identity and a range of the wireless device from the modulated radar signal.
38 Citations
20 Claims
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1. A method for identifying and ranging a wireless device, comprising:
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transmitting chirp radar signal from a detecting system; in response to the chirp radar signal, receiving a modulated radar signal at the detecting system, the modulated radar signal;
(i) being backscattered from an antenna of the wireless device, (ii) containing information pertaining to the wireless device, and (iii) being a frequency offset version of the chirp radar signal;determining an identity of the wireless device from the modulated radar signal; and determining a range of the wireless device from the modulated radar signal, which is proportional to an instantaneous frequency difference of the modulated radar signal minus the frequency offset. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for identifying and ranging a wireless device, comprising:
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a processor coupled to memory, a transmitter, and a receiver; and
,at least one hardware module and at least one software module controlled or executed by the processor, the modules comprising; a module for controlling the transmitter to transmit an chirp radar signal from the system; a module for controlling the receiver to, in response to the chirp radar signal, receive a modulated radar signal, the modulated radar signal;
(i) being backscattered from an antenna of the wireless device, (ii) containing information pertaining to the wireless device, and (iii) being a frequency offset version of the chirp radar signal;a module for determining an identity of the wireless device from the modulated radar signal; and a module for determining a range of the wireless device from the modulated radar signal, which is proportional to an instantaneous frequency difference of the modulated radar signal minus the frequency offset. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification