摘要
随着合成孔径雷达(synthetic aperture radar,SAR)的应用需求不断提高,出现了圆迹SAR的成像模式,解决传统直线轨迹SAR只能获取二维斜距图像的问题,在地形测绘、建筑物提取、灾害评估等领域具有较高应用潜力。现有的圆迹SAR三维成像算法还存在计算量大、实现复杂等问题,通过对圆迹SAR模型的斜距几何分析,结合回波信号模型设计波数域补偿函数,将距离压缩曲线矫正为基线为零的正弦曲线;结合逆Radon变换,实现对目标的正弦曲线的二维聚焦;通过逐高度平面二维成像结果的堆叠,实现目标的三维成像。通过仿真分析了所提算法的成像质量,验证了所提算法三维成像的有效性。
With the increasing application demand for synthetic aperture radar(SAR),the imaging mode of circular SAR appears,which solves the problem that the traditional linear trajectory SAR can only obtain twodimensional slant distance images,and has higher application potentials in topographic mapping,building extrac⁃tion,disaster assessment and other fields.The existing circular SAR three-dimensional imaging algorithm still has such problems as large computation load and complex implementation,etc.through the combination of the slant distance geometric analysis of the circular SAR model and the echo signal model,the wave-number domain compensation function is designed,and the range compression curve is corrected to the sine curve with zero base⁃line.The inverse Radon transform is used to realize the two-dimensional focus of the sinusoidal curve of the tar⁃get.By stacking the two-dimensional imaging results of each height plane,three-dimensional imaging of the tar⁃get is realized.Finally,the imaging quality of the proposed algorithm is analyzed by simulation,and the effective⁃ness of 3-D imaging of the proposed algorithm is verified.
作者
车俐
欧阳龙华
蒋留兵
CHE Li;OUYANG Longhua;JIANG Liubing(School of Information and Communication,Guilin University of Electronic Technology,Guilin 541004,China;Guangxi Key Laboratory of Wireless Broadband Communication and Signal Processing,Guilin 541004,China)
出处
《火力与指挥控制》
CSCD
北大核心
2024年第9期18-24,共7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基金(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)
八桂学者专项经费基金(2019A51)
桂林电子科技大学研究生教育创新计划基金资助项目(2022YXW07,2022YCXS080,2023YCXS022)。
