一种高重频极化雷达的慢速目标检测方法研究

Research on Slow Target Detection with High Refrequency Polarization Radar

提出一种适用于高重频极化雷达的慢速目标检测方法。雷达采用高重频跟踪波形,利用变初相和收发极化切换的方式,实现对因距离模糊而落入近区强杂波段内的慢速目标的检测。基于高重频波形下目标与近区杂波距离模糊个数的差异,通过改变发射脉冲的初相和收发天线的极化方式,一方面改变回波中目标的等效多普勒频率,另一方面利用收发极化正交有效抑制近区杂波,减少自动增益控制对模糊在近区杂波段目标的衰减,最后完成目标与杂波在多普勒维的分辨,并通过计算机仿真进行验证。

This paper presents a slow target detection method suitable for high refrequency polarization radar.The radar adopts the high refrequency tracking waveform,and realizes the detection of the slow target falling into the strong clutter band in the near area due to the fuzzy rang by means of changing the initial phase and transmitting and receiving polarization switching.In this paper,based on the difference between the number of distance blur between the target and the near-area clutter under the high refrequency waveform,by changing the initial phase of the transmitted pulse and the polarization mode of the transceiver antenna,on the one hand,the equivalent Doppler frequency of the target in the echo is changed,on the other hand,the near-area clutter is effectively suppressed by using the orthogonal transmitter-receiving polarization,so as to reduce the attenuation of fuzzy automatic gain control on the near-area clutter target.Finally,the resolution of target and clutter in Doppler is completed and verified by computer simulation.