METHOD FOR CROSS-RANGE ENHANCEMENT OF REAL-BEAM RADAR IMAGERY
First Claim
1. An apparatus for acquiring and displaying a radar image, the apparatus comprising:
- an antenna configured to receive a reflected radar signal;
a processor configured to convert the received radar signal into a received power function versus azimuth, including generate a map image from the received power function versus azimuth by multiplying the received power function versus azimuth by a window function; and
a map display configured to display a resolution-enhanced map image based on the received radar signal.
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Accused Products
Abstract
Methods and apparatus for enhancing the resolution of a radar image in the cross-range direction. An example method includes receiving a plurality of received power samples in the cross-range dimension as the radar antenna scans and calculating a window function from the antenna beam response pattern. Then for each of a plurality of positions of the window function along the azimuth axis, multiplying the received response pattern by the window function at that position, yielding a product function for each position. Finally, the method includes calculating an estimated azimuth bin offset, resulting estimated target location, and a reflected power value corresponding to the integral of the product function from the product function of each position. A reconstructed azimuth bin array developed from the estimated target locations and reflected power values is substituted for the original received cross-range received power values, yielding a resolution-enhanced map image.
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Citations
16 Claims
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1. An apparatus for acquiring and displaying a radar image, the apparatus comprising:
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an antenna configured to receive a reflected radar signal; a processor configured to convert the received radar signal into a received power function versus azimuth, including generate a map image from the received power function versus azimuth by multiplying the received power function versus azimuth by a window function; and a map display configured to display a resolution-enhanced map image based on the received radar signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for acquiring and displaying a radar map image, the method comprising:
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pointing a radar antenna in a first direction along an azimuth; receiving at the radar antenna a reflected radar signal when pointed at the first direction along the azimuth; repeating the steps of pointing and receiving for a plurality of predefined directions along the azimuth; converting the plurality of received radar signals into a bin array of received power versus azimuth, generating a map image from the bin array of received power versus azimuth using a pre-defined window function; and displaying the map image on a map display. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification