K-L变换应用于UWB雷达回波信号的增强

K-L Transform for Enhancement of UWB Radar Echo Signal

超宽带(Ultra Wideband,UWB)雷达在车辆防撞、废墟营救和反恐穿墙等场景中都扮演着十分重要的角色。但在实际应用中,当接收到的UWB雷达回波信号比较弱或受到外界干扰时,为了得到有用的信息需要对UWB雷达回波信号进行处理。对UWB雷达回波信号进行卡洛南-洛维(Karhunen-Loève,K-L)变换处理,将处理之后的信号与处理之前的信号进行对比,并用运动轨迹的形式来表现。实验结果表明,经K-L变换处理后的UWB雷达回波信号较处理之前有一定的增强。

UWB radars play an important role in automobile collision avoidance, human rescue from d eb r is , through-the-wall an ti-terrorism and other scenarios. While in practical applications when the received UWB radar echo-signal is weak or interfered, the echo- signal has to be processed in order to retrieve the useful information.In this paper, UWB radar echo-signal is first processed by using the K-L transform, then the processed echo-signal is compared with the original echo-signal and showed in the form of motion track. The results show that the processed UWB radar echo-signal shows enhanced performance as compared with the original echo-signal.