探地脉冲雷达回波信号波达方向估计方法的研究

Direction-of-Arrival Estimation of Pulse Signal for Ground-Penetrating Radar

估计探地脉冲雷达目标回波方向是探地雷达信号处理的一个重要内容 ,针对脉冲探地雷达回波信号的超宽带特点 ,提出了将探地雷达阵列信号经过高频带通滤波器分解成几个窄带信号后 ,再利用窄带子空间方法进行波达方向估计 .通过对实验数据的处理发现 ,低频信号的分辨率较低 ,误差较大 .在实际处理过程中 ,并不需要对所有频带信号进行处理 ,只需要用几个较高频率的窄带信号 。

A direction finding method for multiple pulse signals received by ground penetrating radar (GPR) is introduced. With band pass filter,the ultra wide band(UWB) signals have been decomposed into some narrow band signals.Then, the multiple signal classification (MUSIC) algorithm is applied for direction of arrival ( DOA) estimation.Moreover, through processing experimental data,it is found that DOA estimation algorithm can be performed by using only a few high frequency subbands of the incoming signals instead of the whole spectrum of the GPR pulse signals.