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 with a mismatched filter to enhance a resolution of a correlation peak 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, said mismatched filter being formed with filter tap values that enhance an output signal-to-noise ratio of said mismatched filter while reducing peak sidelobes thereof.
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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 with a mismatched filter to enhance a resolution of a correlation peak 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, said mismatched filter being formed with filter tap values that enhance an output signal-to-noise ratio of said mismatched filter while reducing peak sidelobes thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. 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 with a mismatched filter to enhance a resolution of a correlation peak 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, said mismatched filter being formed with filter tap values that enhance an output signal-to-noise ratio of said mismatched filter while reducing peak sidelobes thereof. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification