一种MIMO雷达幅相误差估计方法  

An Estimation Method for MIMO Radar Gain and Phase Errors

作　　者：徐青[1] 廖桂生[1] 张娟[1] 曾操[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《航空学报》2012年第3期530-536,共7页Acta Aeronautica et Astronautica Sinica

基　　金：国家"973"计划(2011CB707001);国家自然科学基金(61101242);长江学者和创新团队发展计划(IRT0954);中央高校基本科研业务费专项资金(K50511020009)~~

摘　　要：针对单基地相关多输入多输出(MIMO)雷达中存在的阵列幅相误差问题进行了研究。给出了单基地相关MI-MO雷达的阵列模型,并提出了一种MIMO雷达幅相误差估计方法。利用发射正交信号对阵列接收信号进行匹配滤波,可分离得到类似传统阵列的"虚拟阵列",利用分时信源数据将该阵列中真实导向矢量中信源波达方向(DOA)引起的相位与幅相误差分离开,通过构造代价函数得到波达方向估计值,进而分别得到发射阵与接收阵的幅相误差的估计值,同时给出了误差引入量分析。最后通过仿真验证了该方法的有效性。本文介绍的方法简单可行,适用于任意构型MI-MO雷达的幅相误差估计。This paper studies the problem of estimation of array gain and phase errors in a collocated multiple-input multiple-output（MIMO） radar.An array model for a monostatic collocated MIMO radar is presented,and a method that estimates the gain and phase errors for MIMO radar systems is also given.By using the transmitted orthogonal waveforms to match the received signals,a ＂virtual array＂ similar to the conventional array can be obtained.Based on the time-sharing data,the phase caused by the direction of arrival（DOA） of the time-sharing signal and the gain and phase errors are separated from each other in the ＂virtual array＂ real steering vector.A cost function is structured to get the DOA estimation,and then the gain and phase errors are estimated based on the DOA estimates obtained afore.The remainder error induced by the estimation process is analyzed.Finally,the validity of the model is testified through computer simulation.The method introduced in this paper is simple and feasible,and suitable for any array manifold.

关 键 词：雷达 MIMO 幅相误差 校正 单基地雷达 

分 类 号：V243.2[航空宇航科学与技术—飞行器设计] TN958[电子电信—信号与信息处理]