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引言雷达照射在旋转目标上通常在后向反射信号中产生一个调制,由此提供了一种检测工具,这在通常的雷达技术中是很难做到的。由于目标运动,参照雷达频率f_0,雷达回波中包含了多卜勒频移。这种频移复盖了一定的带宽,一般言之,其带宽正比于f_0和每秒钟的旋转数f_(roto)与旋转物体的特定构造有关(如翅膀、叶片的数目等),所收到的雷达回波由有限数目的多卜勒谱线构成,其间隔
Introduction Radar illumination usually produces a modulation in the retroreflected signal at a rotating target, thereby providing a detection tool that is difficult to achieve with conventional radar technology. Due to the target motion, the Doppler shift is included in the radar echo, with reference to the radar frequency f_0. This frequency shift covers a certain amount of bandwidth. In general, its bandwidth is proportional to f_0 and the number of rotations per second, f_ (roto), depends on the particular configuration of the rotating object (eg wings, number of blades, etc.) The radar echoes that are made up of a finite number of Doppler spectral lines are spaced apart