Passive tracking of objects using bistatic dual-polarization receivers
First Claim
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1. A method for determining location of a moving object, the method comprising the steps of:
- receiving from a first receiver antenna system, comprising a first left polarized receiver and a first right polarized receiver, a first signal transmitted by a moving object;
receiving simultaneously from a second receiver antenna system that is distinct and space apart from the first receiver antenna system and that comprises a second left polarized receiver and a second right polarized receiver, a second signal transmitted by the moving object;
extracting from the first signal a first polarization-based component;
extracting from the second signal a second polarization-based component;
computing a time difference maximizing a correlation of the first and second polarization-based components; and
computing a location of the moving object based on, in part, the time difference.
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Abstract
A system for detecting and/or tracking a moving object uses signals received from the object at two or more receivers, each of which is dual polarized. At each receiver, the component of the received signal associated with the polarization thereof is separated from the non-polarization-based component, and the modulation of the polarization-based component is used for locating and/or tracking the moving object.
3 Citations
19 Claims
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1. A method for determining location of a moving object, the method comprising the steps of:
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receiving from a first receiver antenna system, comprising a first left polarized receiver and a first right polarized receiver, a first signal transmitted by a moving object; receiving simultaneously from a second receiver antenna system that is distinct and space apart from the first receiver antenna system and that comprises a second left polarized receiver and a second right polarized receiver, a second signal transmitted by the moving object; extracting from the first signal a first polarization-based component; extracting from the second signal a second polarization-based component; computing a time difference maximizing a correlation of the first and second polarization-based components; and computing a location of the moving object based on, in part, the time difference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for determining location of a moving object, the system comprising:
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a first processor; and a first memory in electrical communication with the first processor, the first memory comprising instructions which, when executed by a processing unit comprising at least one of the first processor and a second processor, the processing unit being in electronic communication with a memory module comprising at least one of the first memory and a second memory, program the processing unit to; receive from a first receiver antenna system, comprising a first left polarized receiver and a first right polarized receiver, a first signal transmitted by a moving object; receive simultaneously from a second receiver antenna system that is distinct and spaced apart from the first receiver antenna system and that comprises a second left polarized receiver and a second right polarized receiver, a second signal transmitted by the moving object; extract from the first signal a first polarization-based component; extract from the second signal a second polarization-based component; compute a time difference maximizing a correlation of the first and second polarization-based components; and compute a location of the moving object based on, in part, the time difference. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification