【作者】 何志敏； 何岷； 李景文； 陈杰； 周荫清；

【Author】 He Zhimin He Min Li Jingwen Chen Jie Zhou Yinqing (School of Electronics and Information Engineering Beijing University of Aeronautics and Astronautics Beijing 100083 China)

【机构】 北京航空航天大学电子信息工程学院；

【摘要】 常规多普勒中心频率估计算法对环扫雷达数据进行杂波锁定,存在估计误差较大、稳定性差等缺点,影响了图像质量和后续应用。本文针对环扫成像的工作体制,提出了一种具有较高估计精度和稳定性的改进杂波锁定算法。该算法充分利用环扫过程中多普勒中心频率变化的特点,克服了局部样本估计误差较大带来的影响,提高了多普勒中心频率的估计精度和稳定性。真实回波数据和仿真结果的实验表明,该算法满足图像质量要求,具有较大的实用价值。更多还原

【Abstract】 The accuracy and the stability of the traditional method estimating the Doppler centroid frequency of Circular Scanning Radar data for the clutter lock is not high enough and the estimation result will eventually degrade the quality of the radar image and affect its later applications.In this paper,we propose an improved method that suits to the circular scanning imaging radar.The method bases on the characteristics of the Doppler centroid frequency of Circular Scanning Imaging Radar,conquers the bad influence some error estimation results brings and improves the accuracy and the stability of the Doppler centroid frequency.The effectiveness of this method has been demonstrated by experimental results and the emulational results.更多还原