METHODS AND APPARATUS FOR DETECTING THREATS USING RADAR
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Accused Products
Abstract
Methods and apparatus for early detection and identification of a threat such as individuals carrying hidden explosive materials, land mines on roads, etc. are disclosed. One method comprises illuminating a target with radiation at a first polarization, collecting first radiation reflected from the target which has the same polarization as the first polarization, illuminating a target with radiation at a second polarization, and collecting second radiation reflected from the target which has the same polarization as the second polarization. A threat determination is then made based on the difference between the energy values of the first and second collected radiations. In other embodiments, the difference between energy values is used in conjunction with an evaluation of the returned energy in comparison with returned energy from other targets in order to additionally assess whether the primary target is a threat.
49 Citations
45 Claims
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1-29. -29. (canceled)
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30. A method of detecting a threat, the method comprising:
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operating a multi-channel frequency modulated continuous wave radar module to transmit and receive both horizontally and vertically polarized waveforms; operating a multi-channel pulse Doppler channel radar to transmit and receive both horizontally and vertically polarized waveforms; making a first independent threat assessment based on received multi-channel frequency modulated continuous wave signals; making a second independent threat assessment based on received Doppler channel radar signals; and based on the first and second independent threat assessments making a threat determination. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A threat detection system, comprising:
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a multi-channel frequency modulated continuous wave radar module configured to transmit and receive both horizontally and vertically polarized waveforms; a multi-channel pulse Doppler channel radar configured to transmit and receive both horizontally and vertically polarized waveforms; a first threat assessment module configured to make a first independent threat assessment based on received multi-channel frequency modulated continuous wave signals; a second threat assessment module configured to make a second independent threat assessment based on received Doppler channel radar signals; and a threat declaration module configured to make a threat determination based on the first and second independent threat assessments. - View Dependent Claims (41, 42, 43, 44, 45)
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Specification