摘要
非视距雷达成像技术旨在重建障碍物干扰下的隐藏目标,在自动驾驶、区域安防等领域具有极大的应用潜力。基于多输入多输出毫米波雷达,提出一种利用多径反射信号反演雷达视线外隐藏目标散射特性的二维成像技术。该方案采用高精度导轨搭载MIMO毫米波雷达扫描合成2-D等效均匀阵列,利用多径反射回波重构隐藏目标图像。此外,建立NLOS成像模型并提出一种基于2-D波数域算法和镜面对称的高精度成像方法。在该方法中通过对隐藏目标的横断面成像提取NLOS目标以及反射墙面的先验知识,利用先验知识结合镜面对称原理,实现NLOS目标冠状面高精度聚焦获得目标轮廓。通过NLOS毫米波成像系统验证了所提算法的有效性。
Non-line-of-sight(NLOS)radar imaging technology is designed to reconstruct hidden targets under the interference of obstacles,and has great application potential in autonomous driving,regional security and other fields.Based on multi-input multi-output(MIMO)millimeter-wave radar,a two-dimensional(2-D)imaging technique using multi-path reflected signals to invert the scattering characteristics of hidden targets in radar non-line-of-sight is proposed.In this scheme,a 2-D equivalent uniform array is synthesized by a MIMO millimeter wave radar scan with mounted on high precision rail,multi-reflection echo is used to reconstruct hidden targets is images.In addition,the NLOS imaging model is established and a high precision imaging method based on 2-D wave number domain algorithm and mirror symmetry is proposed.In this method,the prior knowledge of the NLOS targets and the reflecting wall is extracted by cross-sectional imaging of the hidden targets.Then,the prior knowledge is combined with the principle of mirror symmetry to achieve the high-precision focusing of the coronal plane of the NLOS targets to obtain the target contour.Finally,the effectiveness of the proposed algorithm is verified by NLOS millimeter wave imaging system.
作者
蒋留兵
黄乾超
车俐
JIANG Liubing;HUANG Qianchao;CHE Li(School of Information and Communication,Guilin University of Electronic Technology,Guilin 541004,China;Key Laboratory of Guangxi Wireless Broadband Communication and Signal Processing,Guilin 541004,China)
出处
《火力与指挥控制》
北大核心
2025年第1期33-40,共8页
Fire Control & Command Control
基金
国家自然科学基金(61561010)
广西创新驱动发展专项资助(桂科AA21077008)
广西无线宽带通信与信号处理重点实验室2022年主任基金(GXKL06220102,GXKL06220108)
八桂学者专项经费资助(2019A51)
桂林电子科技大学研究生教育创新计划资助(2022YXW07,2022YCXS080,2023YXW02)
广西研究生教育创新计划基金资助项目(YCSW2023317)。
关键词
非视距成像
毫米波雷达
波数域成像
合成孔径
non-line of sight imaging
millimeter wave radar
wavenumber domain imaging
syn-thetic aperture
