波形切换对雷达距离测量的影响

Influence of Waveform Switching on Radar Range Measurement

雷达为满足距离测量的需要,在不同的跟踪距离区间采用不同的波形参数,但在波形切换时会产生距离测量值的跳变。结合雷达典型的距离跟踪原理,分析了导致雷达波形切换时距离跳变的根本原因是未进行距离-多普勒耦合的补偿,对距离-多普勒耦合产生的原因及其对脉冲压缩雷达距离测量的影响进行了研究,给出了一种可行的距离-多普勒耦合补偿方法,并进行了试验验证。结果表明,该方法可有效消除距离-多普勒耦合引起的距离测量误差,解决了波形切换时距离测量值的跳变问题。

To meet the need of range measurement,different waveform parameters are used in different tracking distance intervals in radar,however,a range value jump occurs when the waveform is switched.Combined with the typical range tracking principle of radar,this paper analyzes the fundamental reason resulting in range jump in radar when the waveform is switched,which is the range-Doppler coupling is not compensated.The reason for range-Doppler coupling and its influence on range measurement of pulse compression radar are studied,a feasible range-Doppler coupling compensation method is presented and verified by experiments.The results show that the method can effectively eliminate the range measurement error caused by range-Doppler coupling,and solve the problem of range measurement value jump when the waveform is switched.