摘要
合成孔径雷达(Synthetic Aperture Radar,SAR)是一种全天候、全天时的现代高分辨率微波成像雷达。分析了收发共置天线模型和多元静态雷达模型,FDTD建模模拟了室内目标探测场景,通过后向投影算法(back projection,BP)得到雷达图像,很好的验证了该雷达用于穿墙中的高分辨率成像。电磁波在穿墙传播时发生折射,速度的改变、信号的衰减,这些影响将导致像的散焦、偏移,甚至可能产生虚像,所以成像算法中必须考虑墙体作用。
Synthetic aperture radar is a modern microwave imaging radar with high resolution in all weather all day,this paper analyses models of mono-static and multi-static,radar images are obtained using FDTD simulation and back projection,and in the end this research verify high resolution in through wall imaging using this kind of radar.Various effects of presence of the wall,such as refraction,changing in speed,and attenuation,can defocus target images,displace targets from their true positions and possibly produce false targets.So it is very important to consider the effects of wall in imaging algorithm.
出处
《南京邮电大学学报（自然科学版）》
2011年第4期79-83,共5页
Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition
关键词
时域有限差分法
超宽带
合成孔径雷达
后向投影算法
finite-difference time-domain
ultra wideband
synthetic aperture radar
back projection
