Interrogator and system employing the same
First Claim
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1. An interrogator, comprising:
- a receiver configured to receive return signals from a tag;
a sensing module configured to provide time estimates associated with said return signals; and
a processor configured to employ synthetic aperture radar processing on said return signals in accordance with said time estimates and an estimated velocity of said interrogator to coherently integrate said return signals to locate a position of said tag by constructing a phase trajectory of said return signals based on a time-dependent sum of squares of differences between coordinates of a position of said interrogator and coordinates of an hypothesized location of said tag.
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Abstract
An interrogator and system employing the same. In one embodiment, the interrogator includes a receiver configured to receive a return signal from a tag and a sensing module configured to provide a time associated with the return signal. The interrogator also includes a processor configured to employ synthetic aperture radar processing on the return signal in accordance with the time to locate a position of the tag.
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Citations
20 Claims
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1. An interrogator, comprising:
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a receiver configured to receive return signals from a tag; a sensing module configured to provide time estimates associated with said return signals; and a processor configured to employ synthetic aperture radar processing on said return signals in accordance with said time estimates and an estimated velocity of said interrogator to coherently integrate said return signals to locate a position of said tag by constructing a phase trajectory of said return signals based on a time-dependent sum of squares of differences between coordinates of a position of said interrogator and coordinates of an hypothesized location of said tag. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of operating an interrogator, comprising:
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receiving return signals from a tag; providing time estimates associated with said return signals; and performing synthetic aperture radar processing on said return signals in accordance with said time estimates and an estimated velocity of said interrogator to coherently integrate said return signals to locate a position of said tag by constructing a phase trajectory of said return signals based on a time-dependent sum of squares of differences between coordinates of a position of said interrogator and coordinates of an hypothesized location of said tag. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification