摘要
在进入陌生建筑物之前掌握其内部结构信息,能够为反恐作战、灾害救援、监视管控等多种应用提供支持,具有重要的现实意义和研究价值。为实现建筑布局结构信息获取,该文开展了基于多域联合直达波估计的建筑布局层析成像方法研究。首先,建立了线性近似模型,实现了直达波信号传播时延与未知建筑布局图像之间的映射关系;在此模型基础上,分析了在层析成像模式下直达波信号与多径信号在快时间域、慢时间域与多普勒域中的分布特性,提出了一种基于多域联合的直达波估计算法,实现了多径干扰抑制与直达波信号精确估计;此外,提出了一种总变分约束的投影矩阵自适应修正代数重建算法,提升了有限数据下的建筑布局反演质量;最后,电磁仿真与实测实验结果证明了所提出的建筑布局层析成像方法的有效性,其重建结果的结构相似性指标分别可达到91.2%和81.7%,显著优于现有建筑布局层析成像方法。
Obtaining internal layout information before entering unfamiliar buildings is crucial for various applications,such as counter-terrorism operations,disaster relief,and surveillance,highlighting its great practical significance and research value.To enable the acquisition of the building layout information,this paper presents a building layout tomography method based on joint multidomain direct wave estimation.First,a linear approximation model is established to map the relationship between the propagation delay of direct wave signals and the layout of the unknown building.Using this model,the distribution characteristics of direct wave and multipath signals in the fast-time,slow-time,and Doppler domains are analyzed in the tomographic imaging mode.A joint multidomain direct wave estimation algorithm is then proposed to achieve the suppression of multipath interference and precise estimation of direct wave signals.Additionally,a projection matrix adaptive correction algebraic reconstruction algorithm with total variation constraints is proposed,which enhances building layout inversion quality under limited data scenarios.Finally,electromagnetic simulation and experimental results demonstrate the effectiveness of the proposed building layout tomography method,with structural similarity indices of 91.2% and 81.7% for the reconstructed results,significantly outperforming existing building layout tomography methods.
作者
李念
刘杰
于君明
朱智豪
刘剑光
郭世盛
陈家辉
崔国龙
孔令讲
杨晓波
LI Nian;LIU Jie;YU Junming;ZHU Zhihao;LIU Jianguang;GUO Shisheng;CHEN Jiahui;CUI Guolong;KONG Lingjiang;YANG Xiaobo(School of Information and Communication Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China;The 27th Research Institute of China Electronics Technology Group Corporation,Zhengzhou 450047,China)
出处
《雷达学报(中英文)》
北大核心
2025年第2期309-321,共13页
Journal of Radars
基金
国家自然科学基金(62401098,62371110)。
关键词
建筑布局层析成像
直达波估计
代数重建技术
总变分约束
投影矩阵自适应修正
Building layout tomographic imaging
Direct wave estimation
Algebraic Reconstruction Technique(ART)
Total Variational(TV)constraint
Projection Matrix Adaptive Modification(PMAM)
