METHOD AND SYSTEM FOR MAPPING A TARGET SCENE USING SCANNING RADAR
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Abstract
A system and method for mapping a target scene by means of scanning radar utilizing the Doppler effect that arises in the event of movement between radar and target scene, where the movement of a platform upon which the radar'"'"'s antenna is mounted is calculated utilizing navigation data obtained for the platform. The system and method can generate high-resolution radar images in an almost forward-looking application. This is achieved by introducing an approach compensation (7), in which the signal quantity received by the radar which is related to transmitted pulses is transformed pulse by pulse to a corresponding movement-corrected signal quantity by displacement in time and phase, dependent upon the platform'"'"'s movement along an imaginary platform movement directed in such a way that the antenna'"'"'s momentary direction is essentially 90° to the direction of the movement of the imaginary platform.
11 Citations
32 Claims
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1-12. -12. (canceled)
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13. A method for mapping a target scene from a moving platform, the method comprising:
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providing a scanning Doppler radar sensitive to a relative movement between the radar and the target scene; calculating a movement of a platform on which a radar antenna is mounted utilizing navigation data obtained for the platform; and approach compensating a radar return signal, wherein, for approach compensation, a signal quantity related to pulses transmitted and received by the radar is transformed pulse by pulse to a corresponding movement-corrected signal quantity by displacement in time and phase, dependent upon a movement of the platform along an imaginary platform movement direction oriented in such a way that a momentary direction of a radar antenna is oriented at essentially 90°
with respect to a direction of the movement of the imaginary platform. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A system for mapping a target scene from a moving platform, the system comprising:
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a scanning Doppler radar and antenna mounted on the moving platform adapted to detect a relative movement between the radar and the target scene; a navigation circuit on the moving platform; a movement calculating circuit that calculates a movement of the moving platform utilizing navigation data provided by the navigation circuit, and a compensating circuit that approach compensates a signal quantity related to pulses transmitted and received by the radar by pulse by pulse transformation to a corresponding movement-corrected signal quantity by displacement in time and phase, dependent upon the movement of the platform along an imaginary platform movement directed in such a way that a momentary direction of the radar antenna is oriented at essentially 90°
with respect to a direction of the movement of the imaginary platform. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32)
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Specification