机载雷达成像中的两种改进多普勒质心估计算法  

TWO IMPROVED DOPPLER CENTROID ESTIMATION TECHNIQUES IN IMAGING THROUGH DOPPLER BEAM SHARPENING

作　　者：孙泓波[1] 顾红[1] 苏卫民[1] 刘国岁[1] 

机构地区：[1]南京理工大学电子工程技术研究中心,江苏南京210094

出　　处：《兵工学报》2002年第1期49-53,共5页Acta Armamentarii

基　　金：国防科技重点实验室基金资助项目 (99JS0 1.4.1.DZ2 40 1)

摘　　要：多普勒质心估计是机载脉冲多普勒雷达DBS成像技术中最为关键的步骤之一。本文针对载机惯导参数误差较大的实际情况 ,提出了改进的频域和时域多普勒质心估计算法。新的算法克服了传统算法受地面场景非均匀性和回波信号起伏的影响 ,大大提高了估计的精度。最后将这些算法用于某型脉冲多普勒雷达的实测数据 。Doppler centroid estimation is one of the most important steps in the DBS imaging of airborne pulse Doppler radars. Under the condition that marked inertial navigation units(INU) measurement errors do exist, two new Doppler centroid estimation techniques in frequency domain and time domain were proposed. The new algorithm obviates the effects of non homogeneity in sight and fluctuations of echoes, and the precision of estimation is improved significantly. These algorithms are applied to some radar data, and results of imaging proved their effectiveness.

关 键 词：多普勒波束锐化 机械脉冲多普勒雷达 多普勒质心估计 机载雷达 

分 类 号：TN959.73[电子电信—信号与信息处理]