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DIGITAL BEAMFORMING BASED RESOLUTION OF OUT-OF-PATH TARGETS SHOWING UP AS IN-PATH DUE TO GRATING LOBES IN ARRAY ANTENNA RADARS.
DIGITAL BEAMFORMING BASED RESOLUTION OF OUT-OF-PATH TARGETS SHOWING UP AS IN-PATH DUE TO GRATING LOBES IN ARRAY ANTENNA RADARS.
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机译:基于数字波束形成的路径异常目标的解决方案,因为该目标由于阵列天线雷达中的凸起而显示为路径内。
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摘要
An antenna system, such as a radar antenna system, includes an array of antenna elements and a controller. The controller outputs an in-path indicator in response to an angle of arrival for a target being less than a threshold angle for a given range to the target. The angle of arrival is based on a differential phase angle derived from data defining first and second composite signal returns from the target associated with first and second apertures respectively, and a phase center offset between the apertures. The first and second apertures are formed from first and second subsets of the antenna elements respectively.
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