基于时间反转的探地雷达多目标成像算法研究  

Multi-target Imaging Algorithm Based on Time Reversal for Ground Penetrating Radar Data

作　　者：吴索路 欧阳缮[1,2] 张海如[2] 

机构地区：[1]桂林电子科技大学信息与通信学院,桂林541004 [2]西安电子科技大学电子工程学院,西安710071

出　　处：《微波学报》2015年第5期51-54,共4页Journal of Microwaves

基　　金：国家自然科学基金项目(61371186);广西自然科学基金项目(2013GXNSFFA019004)

摘　　要：时间反转成像算法用于探地雷达多目标成像时,由于各个目标体的能量聚焦时刻和聚焦能量的强度都不相同,使得智能识别局部能量聚焦时刻成为该算法的瓶颈。为了实现时间反转成像算法用于探地雷达多目标成像,首先在B-Scan中检测到潜在目标双曲线位置,然后用窗口框出各个潜在目标体的"空间-时间"位置,之后将该"空间-时间"窗口转化为待成像区域中的"位置-埋深"窗口,并对各个潜在目标窗口分别进行时间反转成像,虚假目标不存在能量聚焦,进而剔除虚假目标,实现多目标成像。实验结果表明:该算法能较好地实现多目标成像,由于该算法只对潜在目标窗口进行成像,而不是对整个待成像区域进行成像,大大提高了成像效率。Applying time reversal algorithm in ground penetrating radar( GPR) multi-target imaging is viewed as a choke point that due to each object's time of energy focusing and intensity of energy focusing are different. In order to realize the time reversal algorithm for GPR multi-target imaging,this paper firstly detects the location of potential target's hyperbola in B-Scan,then we use the window to outline the ‘space-time'position of each potential target,and then translate the‘space-time'window into the‘position and depth'window of objective imaging region and employ time reversal imaging for each potential target. According to the fact that the false target does not exist energy focusing,we exploit this characteristic to eliminate false target and make the multi-target imaging come true. The experimental result shows that the multi-target imaging algorithm presented in this paper produces a better effectiveness for multi-target imaging. Because the algorithm only image the potential target window,rather than the entire region,in this way we can greatly improve the efficiency of imaging.

关 键 词：探地雷达 时间反转 多目标成像 能量聚焦 

分 类 号：TN957.52[电子电信—信号与信息处理]