信号处理2026，Vol.42Issue(3)：385-397,13.DOI:10.12466/xhcl.2026.03.008
一种基于贝叶斯估计的旋转轨道SAR建筑物三维成像方法研究
Method for Three-Dimensional Building Imaging Using Rotating Orbit SAR Based on Bayesian Estimation
摘要
Abstract
Synthetic aperture radar(SAR)plays a crucial role in the health monitoring of urban buildings.However,in two-dimensional imaging,it encounters challenges such as geometric distortion(overlap,shadowing,and foreshorten-ing)because of the complexity of building structures.As SAR uses the geometric deformations in two-dimensional pro-jections to obtain three-dimensional structural information,3D imaging becomes highly significant in building health monitor-ing.This paper proposes a Bayesian estimation-based rotational millimeter-wave SAR 3D imaging model,as a new approach for building 3D point cloud reconstruction and high-precision height calculation.To address the image quality degradation caused by sidelobes and speckle noise,a multiangle millimeter-wave radar system was developed for data acquisition through rotation along a linear trajectory.A hierarchical matching strategy based on height hypotheses was employed to solve the Range-Doppler(R-D)equation,using correlation matching to improve efficiency.To address point matching errors,a hy-brid distribution model based on stereo matching was developed.Geometric offsets were modeled as target errors,to mini-mize error distribution,optimize elevation,and accelerate 3D imaging.Experiments using a 77 GHz millimeter-wave radar for multiangle data acquisition and 3D point cloud imaging demonstrated an imaging accuracy of 0.412 m compared with Li-DAR point cloud heights,verifying the method's effectiveness and imaging mode reliability.关键词
SAR三维成像/旋转轨道SAR/贝叶斯估计/R-D方程/毫米波雷达Key words
SAR three-dimensional imaging/rotating orbit SAR/Bayesian estimation/R-D equation/millimeter-wave radar分类
信息技术与安全科学引用本文复制引用
董健坤,林赟,王彦平,申文杰,李洋,蒋雯,白泽朝..一种基于贝叶斯估计的旋转轨道SAR建筑物三维成像方法研究[J].信号处理,2026,42(3):385-397,13.基金项目
国家自然科学基金面上项目(62371005) （62371005）
国家自然科学基金重点项目(62131001) The National Natural Science Foundation of China(62371005,62131001) （62131001）
