【作者】 黄晓芳； 马仑； 刘峥；

【Author】 Huang Xiaofang Ma Lun Liu Zheng (National Key Lab.for Radar Signal Processing,Xidian University,Xi’an 710071)

【机构】 西安电子科技大学雷达信号处理国家重点实验室；

【摘要】 针对空对舰导弹的工作特点,研究了一种将自聚焦技术用于弹载合成孔径制导雷达成像的改进算法。弹载SAR录取数据的模式是聚束式,且斜视角较大。在各种聚束式SAR成像算法中,由于对距离迁移的补偿性能欠佳,使图像质量难以保证。本文以距离多普勒(RD)算法为例,利用基于最小熵准则的SAR图像自聚焦算法完成相位误差校正,改善聚焦质量以提高打击精度。仿真结果证明了该方法的有效性。更多还原

【Abstract】 Based on work characteristics of air-to-ship missile,this paper presents an extended algorith which uses the auto focus technique to missileborne synthetic aperture controlling and guiding radar imaging.The mode of missileborne SAR matriculating data is spotlight mode,just for high squint angle.In several SAR imaging algorithms of spotlight mode,bad compensating of range migratory results to bad imaging.In the paper,using minimum entropy criteria,the method,according to RD algorithm,carries out phase errors correction via multidimensional search and improves the imaging quality in order to advance beat precision.The simulating results show the validity of the proposed method.更多还原