SAR雷达色散效应抑制的自适应匹配滤波算法  

Adaptive Matching Filtering Algorithm for SAR Radar Dispersion Effect

作　　者：肖晖 尹畅 罗茜今 王博[1] XIAO Hui;YIN Chang;LUO Xijin;WANG Bo(College of Astronautics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;College of Environmental Science,Nanjing Xiaozhuang University,Nanjing 211171,China)

机构地区：[1]南京航空航天大学航天学院,江苏南京210016 [2]南京晓庄学院环境科学学院,江苏南京211171

出　　处：《测绘地理信息》2024年第2期38-44,共7页Journal of Geomatics

基　　金：自然资源部国土卫星遥感应用重点实验室开放基金(KLSMNR-G202317);国家自然科学基金(41701531)。

摘　　要：星载合成孔径雷达(synthetic aperture radar,SAR)具备强穿透性和不受光照限制等优势,针对在高频波段星载SAR和地面通信时受色散效应影响,产生的信号畸变、失真、幅度起伏和相位起伏问题,提出了一种基于自适应滤波的校正匹配滤波算法,分析了信号失真的特征,对脉冲波形进行校正。实验结果表明,该算法有效补偿了时间延迟和相位畸变,纠正了脉冲信号波形失真。Spaceborne synthetic aperture radar(SAR)has the advantages of strong penetrability and no limitation of illu-mination.Aiming at the problems of signal distortion,signal inaccuracy,amplitude fluctuation and phase fluctuation caused by dispersion effect in high-frequency band during the communication of spaceborne SAR and ground,we propose a corrective matching filtering algorithm based on adaptive filtering,and analyze the characteristics of signal distortion and correct the pulse waveform.The experimental results show that the proposed algorithm can effectively compensate the time delay and phase distortion and correct the pulse signal waveform distortion.

关 键 词：合成孔径雷达(synthetic aperture radar SAR) 高频波段 色散效应自适应滤波 

分 类 号：TN957[电子电信—信号与信息处理]