一种快速自适应角度-多普勒补偿算法  

A Fast Adaptive Angle Doppler Compensation Method

作　　者：田斌[1] 朱岱寅[1] 朱兆达[1] 

机构地区：[1]南京航空航天大学电子信息工程学院,江苏南京210016

出　　处：《航空学报》2011年第9期1705-1713,共9页Acta Aeronautica et Astronautica Sinica

基　　金：国家自然科学基金(61071165);航空科学基金(20102052024)~~

摘　　要：自适应角度-多普勒补偿(Adaptive Angle Doppler Compensation,A2DC)算法可在惯导参数未知的情况下解决非正侧视阵列中由杂波距离相关性引起的非均匀问题,但该算法运算量大、工程实现困难。本文首先对A2DC算法的基本工作原理进行了深入的分析,在此基础上,针对算法运算量大的缺点,将分块处理和近似投影子空间跟踪(Projection Approxi mation Subspace Tracking,PAST)技术引入到A2DC算法中,提出一种快速自适应角度-多普勒补偿(Fast Adaptive Angle Doppler Compensation,FA2DC)算法。与常规的A2DC算法相比,二者补偿性能相当,但FA2DC算法的运算量显著降低。系统仿真验证了此算法的有效性。The adaptive angle Doppler compensation （A2DO） method can be applied to compensate for the clutter range dependence for non-sidelooking arrays without requiring any navigation data. However, this method suffers from a serious drawback of high computational complexity which limits its real-time application. In this paper, the principle of the A2DO method is first investigated. Then, to address the computational burden, a block processing and projection approximation subspace tracking （PAST） technique is inserted into the A2 DO method and a fast A2DO （FA2DO） method is proposed. Simulation results are presented to show that these two compensation methods demonstrate approximately the same performance, but the proposed method reduces the computational complexity significantly.

关 键 词：非正侧视阵列 自适应角度-多普勒补偿 近似投影子空间跟踪 分块处理 空时自适应处理 

分 类 号：V243.2[航空宇航科学与技术—飞行器设计] TN951[电子电信—信号与信息处理]