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中文摘要：
通过对实测海杂波数据的仿真分析，论证了海杂波在分数阶Fourier变换域具有分形特征，而且有目标单元和无目标单元存在分数维差异，这种分数维差异在分数阶Fourier变换域存在一个最大值。基于此特征提出了基于分数阶Fourier变换域海杂波分数维差异的目标检测方法，此方法通过检测回波信号分数阶Fourier变换域分数维的变化的最大值达到检测目标的目的，这比基于时域分数维差异的方法具有更好的检测效果。最后通过对实测海杂波数据进行仿真，证实了该方法的有效性。
英文摘要：
Based on simulation analysis of the measured data of sea clutter, the possibility was verified that sea clutter is somehow fractal in the fractional Fourier transform domain. A method for detection of seasurface moving target was presented using fractal dimension difference in fractional Fourier transform do main. In this method, targets can be detected by comparing the maximum values in the fractal dimension of sea scattered signals. It had better performance than that based on fractal dimension difference in time domain. Through the simulation, the validity of this method is proven.
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