步进调频雷达目标速度的实时不模糊估计方法

Study on Real-Time Unambiguous Estimation of Target Velocity for Stepped-Frequency Linear Frequency-Modulated Pulse Radar

针对高超声速弹载应用背景,提出了一种基于高重频升降频体制的步进调频脉冲压缩雷达分布式目标径向速度的估计方法.该方法首先通过升帧以及降帧距离像片段中因距离-多卜勒耦合所产生的目标距离位置的差异,得到目标速度的模糊估计,然后通过二次相位项补偿的升、降帧距离像片段进行速度匹配相关处理,实现速度解模糊,具有不模糊测速范围大、速度搜索匹配所需要的运算开销少的优点.理论分析及仿真结果证实了方法的有效性.

A new method for extended target radial velocity estimation was presented for high pulse-repetition-frequency（PRF） up-down stepped-frequency（SF） linear frequency-modulated（LFM） pulse radar with hypersonic missile-borne application.This method firstly achieves the ambiguous estimation of target radial velocity by the range difference caused by range-Doppler coupling between range profile segment of up frame and down frame,then achieves unambiguous estimation by using quadratic phase term compensated and velocity matched correlation between the range profile segment of the two frames.Theoretical analysis and simulation results have shown that this method has the advantages of wider range of unambiguous velocity measurement and less computation in velocity searching and matching,compared with the traditional methods.