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公开(公告)号:US5436847A
公开(公告)日:1995-07-25
申请号:US249937
申请日:1994-05-26
CPC分类号: G01R23/16 , G01S7/415 , Y10S706/90
摘要: The invention relates to a method for determining a periodic pattern in an amplitude spectrum, for example, in a Doppler spectrum of a radar echo. A residual spectrum is formed using Fuzzy Set Theory, and the periodic pattern is determined for each residual spectrum by histogramming the original spectrum. The method can be used for identifying aircraft, for example helicopters, that have periodically-moving components, e.g., rotors, that generate a periodic pattern in a Doppler spectrum.
摘要翻译: 本发明涉及一种用于确定振幅谱中的周期性图案的方法,例如在雷达回波的多普勒频谱中。 使用模糊集理论形成残差光谱,并通过直方图原始光谱确定每个残差光谱的周期模式。 该方法可以用于识别在多普勒频谱中产生周期性模式的具有周期性移动的部件(例如转子)的飞机,例如直升机。