线性调频匹配滤波器的ARM回波提取技术

针对反辐射导弹(ARM)及其载机的雷达回波特性,提出一种改进的ARM回波提取方法,即先根据载机回波多普勒频率的估计值对时延信号进行相位补偿,然后与原信号相减抑制载机回波,再用线性调频匹配滤波器积累ARM回波。通过分析不同调频匹配误差条件下的滤波器性能,获得了有价值的结论。仿真实验表明该方法在低信噪比下仍然可以有效地提取ARM回波信号。

Technique of Extracting ARM Echo Based on LFM Matched Filter

Aiming at the radar echo characteristics of anti-radiation missile(ARM) and its carrier,an improved method of extracting ARM echo is proposed in this paper.Firstly,the phase of delayed signal is compensated by estimation of Doppler frequency,then the strong carrier echo is canceled through subtraction from primary signal.Finally,the ARM echo is integrated by linear frequency modulated matched filter.We got some valuable conclusion by analyzing the performance under unmatched condition.Simulation experiments show that the method is still effective even when the signal to noise ratio is low.