基于超宽带信号的穿墙雷达目标定位研究  

Research on target localization using through-wall radar based on Ultra Wide-Band signal

作　　者：周觅[1] 何培宇[1] 余晶鑫[1] 张弘[1] 杨涛[1] 钟诚[1] 任柯昱[2] 唐丹[2] 

机构地区：[1]四川大学电子信息学院,成都610064 [2]中国工程物理研究院电子工程研究所,绵阳621900

出　　处：《四川大学学报（自然科学版）》2008年第2期336-342,共7页Journal of Sichuan University(Natural Science Edition)

摘　　要：超宽带信号在穿透墙或其它障碍物的传播过程中会发生折射的现象,给探测目标的定位造成误差.提出了一种数值逼近的计算方法来求解真实的折射路径和回波时间延迟,简化了计算过程.同时也采用多周期脉冲信号的周期累加方式来处理信号消噪问题,大大改善了信噪比.最后对不同阵元数条件下的目标探测效果进行了比较.仿真结果表明阵元数越多,信噪比越高,定位也越精确.The error of target localization is mostly caused by the refraction of propagating when an ultra wide- band signal travels through a wall or other obstacles. This paper proposes a numerical approaching algorithm to calculate the real refraction route and the time-delay of the echo, simplifying the calculation. In order to improve the SNR, the multi-period pulse is used as the detecting signal, which is processed in the way of period accumulation. By comparing the detecting effects in condition of different array element number, the simulation result shows that the more the array elements are, the higher the SNR is, and the more accurate the target localization is.

关 键 词：超宽带 穿墙成像 聚焦延迟 折射路径 脉冲周期累加 

分 类 号：TN957.51[电子电信—信号与信息处理]