基于空间特征的MIMO穿墙雷达墙杂波抑制

发布时间：2018-03-22 02:36

本文选题：MIMO穿墙雷达　切入点：杂波抑制　出处：《电子与信息学报》2014年04期 　论文类型：期刊论文

【摘要】：在穿墙成像中,墙体反射波相对于目标回波具有很强的能量,因此对目标的成像及检测造成严重干扰。传统的空域滤波方法基于单发单收阵列体制,利用墙体空间特征不变性有效地抑制墙体杂波。随着MIMO技术越来越多的应用于穿墙雷达,墙体空间特征发生变化,该方法不再适用于MIMO穿墙雷达回波。为解决这一问题,该文分析了MIMO穿墙雷达回波中墙体与目标回波的空间特征,参数化建模结果表明,墙体回波的空间特征与天线阵列的位置无关且具有对称性,而目标回波不具有该特性。根据两者的这一差异,该文提出对称消去法来消除墙体回波。仿真结果表明该方法能够有效地消除墙体杂波,且能够保留目标的全部信息。
[Abstract]:In the imaging of the wall, the reflected wave of the wall has a strong energy relative to the echo of the target, so it causes serious interference to the imaging and detection of the target. The traditional spatial filtering method is based on the single transmit and single receiving array system. The spatial feature invariance of the wall can effectively suppress the clutter of the wall. With the increasing application of the MIMO technology in the wall penetrating radar, the space feature of the wall is changed, so the method is no longer suitable for the echo of the MIMO penetrating wall radar. In this paper, the spatial characteristics of wall and target echo in MIMO penetrating wall radar echo are analyzed. The results of parametric modeling show that the spatial characteristics of wall echo are independent of the position of antenna array and have symmetry. But the target echo does not have this characteristic. According to the difference between the two methods, a symmetric elimination method is proposed to eliminate the wall echo. The simulation results show that the method can effectively eliminate the clutter of the wall and retain all the information of the target.
【作者单位】：国防科学技术大学电子科学与工程学院;
【基金】：国家自然科学基金(61372161,61271441) 全国优秀博士学位论文作者专项资金(201046)资助课题
【分类号】：TN957.51

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