摘要
超宽带穿墙雷达受墙体对电磁波衰减作用,目标的反射回波很弱,提出一种基于小波与EMD级联的方法检测,用于提高信噪比和信杂比。介绍了穿墙雷达实验系统,对墙后人体运动目标进行探测实验,获得实测数据进行分析。实验结果表明,超宽带穿墙雷达对非金属墙体具有较强的穿透性,对墙后处于径向运动的人体目标具有较好的探测能力,提出的算法可以有效提高信噪比和信杂比。最后利用幅度排序点迹凝聚算法进行目标检测,得到理想的检测结果。
Due to the attenuation effect of the wall on electromagnetic wave,the target echo of UWB（ultra-wideband）TWR（through-the-wall radar）is very weak.A detection method based on the filter of wavelet transform cascaded with EMD is proposed to improve SNR（signal to noise ratio）and SCR（signal to clutter ratio）.The configuration of the TWR prototype is discribed and the moving target detection experiment behind wall is performed.The measured data is analysed.Experiment results indicate that the UWB TWR can penetrate non-metallic wall to detect moving target along range direction and the proposed method can improve SNR and SCR effectively.Finally,the amplitude-sequencing plot clotting algorithm is used for detection and the ideal detection result is obtained.
出处
《雷达科学与技术》
北大核心
2016年第4期393-396,402,共5页
Radar Science and Technology
关键词
超宽带
穿墙雷达
小波变换
经验模式分解
ultra-wideband
through-the-wall radar
wavelet transform
empirical mode decomposition
