现代雷达2025，Vol.47Issue(11)：58-65,8.DOI:10.16592/j.cnki.1004-7859.2025071401
基于ADMM的空间目标太赫兹ISAR图像重建算法
A Terahertz ISAR Algorithm for Image Reconstruction of Space Targets Based on the ADMM Framework
摘要
Abstract
For terahertz inverse synthetic aperture radar(ISAR)imaging of space targets,it has significant advantages in achieving high-resolution visualization and all-weather space situation awareness.However,traditional fast imaging methods usually use fast Fourier transform for target image inversion,which will seriously reduce the imaging quality under high dynamic range conditions.To overcome this limitation,a framework based on the adaptive alternating direction method of multipliers(ADMM)is proposed in this study.First,a compressed sensing(CS)model is constructed to complete ISAR imaging reconstruction,and the ADMM algo-rithm is used to optimize the CS model.Next,an adaptive weighting scheme is introduced to adjust the intensity of the regulariza-tion term l1,aiming to alleviate the imaging accuracy loss caused by traditional fast algorithms.It is worth noting that the ISAR im-aging algorithm is derived into a two-dimensional matrix form to reduce memory consumption and improve computational efficiency.Eventually,experimental verification using simulated and field-measured ISAR data shows that the proposed method outperforms the currently existing methods.It achieves improved peak sidelobe ratio and integrated sidelobe ratio in both range and azimuth di-rections,as well as lower image entropy.Due to its excellent sidelobe suppression capability,the ISAR images processed by this method will show a significant improvement in target detection accuracy.关键词
太赫兹雷达/逆合成孔径成像/交替方向乘子法/旁瓣抑制/空间目标Key words
terahertz radar/inverse synthetic aperture radar(ISAR)/alternating direction method of multiplier(ADMM)/side-lobe suppression/space target分类
信息技术与安全科学引用本文复制引用
杨柳笑,曾旸,元志安,刘威,邓彬,王宏强..基于ADMM的空间目标太赫兹ISAR图像重建算法[J].现代雷达,2025,47(11):58-65,8.基金项目
国家自然科学基金资助项目(62301573) （62301573）
