气象雷达抑制机场宽带杂波方法研究

针对机场区域内气象雷达回波信号中,直升机、螺旋桨飞机等旋转目标产生的杂波难以抑制的问题,文中提出了一种基于快时间维恒虚警处理雷达回波数据的方法。首先,分析了旋转目标产生的杂波和气象雷达回波信号的时频特性;然后,对雷达回波数据进行快慢时间维展开,并对快时间维进行恒虚警率处理,剔除杂波脉冲峰值,得到距离-多普勒域;最后,将距离-多普勒域数据中丢失的部分进行插值计算,比较抑制效果。仿真结果表明:该方法能较好地抑制旋转目标产生的宽带杂波。

A Method of Inhibition Airport Wideband Clutter Based on Weather Radar

Aiming at the problem that the clutter generated by the rotating target such as helicopter and propeller aircraft is difficult to suppress in the radar echo signal of the airport area. A method of processing radar echo data based on fast time constant CFAR is proposed in this paper. Firstly, the time frequency characteristics of clutter and weather radar echo signal generated by rotating target are analyzed. Then, the radar echo data is carried out in a fast and slow time, and the constant false alarm rate is processed in the fast time dimension, and the peak of the clutter pulse is eliminated, and the distance-Doppler field is obtained. Finally, interpolation of the missing parts in the data of the distance-Doppler domain is calculated and the inhibition effect is compared. The simulation results show that the proposed method can suppress the wideband clutter generated by the rotating target.