一种基于旋转测量的阵列幅相误差校正新方法

发布时间：2018-03-06 18:46

本文选题：阵列校正　切入点：幅相误差　出处：《电子与信息学报》2017年08期 　论文类型：期刊论文

【摘要】：校正源信号方向角不容易精确测量,限制了阵列有源校正方法的精度。另一方面,无源校正方法难以应用于存在大阵列误差的场合,其实际应用也受到严重限制。该文提出一种基于旋转测量的阵列幅相误差校正新方法,无需测量校正源信号方向角就能获得较高的校正精度。该方法利用已知的阵列旋转角度,基于最大似然准则获得阵列幅相误差、校正源信号方向角及其复振幅的无模糊估计。相对于校正源信号方向角,阵列旋转角度通过专用测试转台更容易精确测量,因此该方法能以较小的代价获得很高的校正精度。仿真实验验证了该方法的有效性和通用性。
[Abstract]:It is difficult to accurately measure the direction angle of the source signal, which limits the precision of the array active correction method. On the other hand, the passive correction method is difficult to be applied to the situation where there are large array errors. In this paper, a new method for correcting the amplitude and phase error of array based on rotation measurement is proposed, which can obtain higher correction accuracy without measuring the direction angle of the source signal. This method uses the known rotation angle of the array. Based on the maximum likelihood criterion, the array amplitude-phase error is obtained, and the direction angle of the source signal and its complex amplitude are estimated without ambiguity. Compared with the corrected direction angle of the source signal, the rotation angle of the array is more easily and accurately measured by the special test turntable. Therefore, the method can obtain high correction accuracy at a low cost, and the simulation results show that the method is effective and universal.
【作者单位】：电子信息系统复杂电磁环境效应国家重点实验室;武汉大学电子信息学院;
【基金】：CEMEE国家重点实验室主任基金(CEMEE2014 Z0101B) 国家自然科学基金(U1333106,61331012,61371197) 国家重点研发计划(2016YFB0502403)~~
【分类号】：TN911.7

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