现代雷达2026，Vol.48Issue(3)：57-64,8.DOI:10.16592/j.cnki.1004-7859.20240823001
斜视模型下的被动合成孔径定位算法
Passive Synthetic Aperture Localization Algorithm in Squint Model
摘要
Abstract
In synthetic aperture localization,the squint mode is more flexible compared to the broadside mode,and can better adapt to target localization in complex environments.However,the Doppler center frequency is no longer zero in squint mode,resulting in azimuth localization errors for the target.To address this issue,a passive localization algorithm based on squint synthetic aper-ture is proposed in this paper.First,the algorithm constructs a squint positioning model in full aperture mode,which compensates for the Doppler center through linear phase modulation and effectively corrects the frequency offset of the Doppler center,thereby e-liminating positioning deviations.Then,azimuth-focusing is achieved through matched filtering to obtain focused image of the tar-get.Finally,geometric correction is employed to eliminate the spatial variability of azimuth bias,thereby achieving accurate locali-zation results.Simulation analysis and Monte Carlo experiment results demonstrate that the proposed algorithm can effectively en-hance localization accuracy under low signal-to-noise ratio.Experimental data further validate the effectiveness and correctness of the proposed algorithm.关键词
合成孔径定位/斜视模式/多普勒补偿/定位偏差/几何校正Key words
synthetic aperture localization/squint mode/Doppler compensation/localization error/geometric correction分类
信息技术与安全科学引用本文复制引用
葛哲,王裕旗,王安义,孙光才,邢孟道..斜视模型下的被动合成孔径定位算法[J].现代雷达,2026,48(3):57-64,8.基金项目
国家自然科学基金资助项目(62271386) （62271386）
