在飞机目标识别中 ,提取螺旋桨的调制特性十分重要。有关这方面的研究虽不少 ,但在实际中 ,还存在另外很多作周期性运动的构件 ,它们同样包含丰富的目标信息。因此 ,将螺旋桨调制特性的研究进行推广 ,就一般性的周期运动构件的雷达调制回波特性提取方法进行论述 ,并提出识别调制源数目的方法 ,最后用实测数据和仿真数据验证了提出的方法 In airplane target recognition, extracting the modulation characteristics of the propeller is very important. Although a lot of research in this area, but in fact, there are many other components of the cyclical movement, they also contain a wealth of target information. Therefore, the research on the propeller modulation characteristics is generalized. The general method of extracting the radar modulation echo characteristics of periodic moving components is discussed, and the method of identifying the number of modulation sources is proposed. Finally, the measured data and the simulation data are used to verify the proposed method method