A novel near field imaging approach for through-wall imaging
A novel near field imaging approach for through-wall imaging
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DOI：
10.1109/csqrwc.2011.6036911
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发表时间：
2011-07
期刊：
影响因子：
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通讯作者：
Wei-jun Zhong;C. Tong;Lei Xin;Yan Geng
中科院分区：
文献类型：
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作者：
Wei-jun Zhong;C. Tong;Lei Xin;Yan Geng
提出了一种新的近场穿墙成像（TWI）算法。在分析反投影算法缺陷的基础上，应用偶极子近场辐射理论，将远场采样数据转换为近场数据。然后在计算延迟时间的前提下，将近场数据反投影到图像空间，得到墙后目标的反射系数。用时域有限差分法（FDTD）验证了新算法对目标的检测能力。分析了壁面参数对成像分辨率的影响。仿真结果表明，该算法能较好地估计目标的形状，提高成像质量。
A novel near field through-wall imaging (TWI) algorithm with ability in the presence of wall ambiguities is proposed in this paper. On the foundation of analyzing the drawback of back projection algorithm, the near field radiation theory of dipole is applied to transfer the far filed sampling data to near filed dada. Then under the preface of calculating the delay time, the near filed data is back projected to the image space to get the reflection coefficient for targets behind the wall. The capability of the new algorithm to detect the targets is verified by finite-difference time-domain method (FDTD). And the influence of the wall parameter to imaging resolution is analyzed. The simulation results show that the proposed algorithm can estimate the shape of targets well and improve the quality of imaging.