阵列天线通道误差的盲校正

基于特征值分解的高分辨率DOA估计MUSIC算法,在理想阵列条件下性能很好,但对噪声扰动和系统误差都很敏感,噪声扰动和系统误差会严重恶化这一类算法的性能,使其分辨率下降。提出一种基于MUSIC算法的盲校正方法,需要在阵列周围满足远场条件的地方布置一个RF信号源,不需要知道信号源的方位角,就可以精确校正阵列天线的通道误差。仿真结果证明这种方法有效,校正结果理想。

Blind calibration of array antenna

The high-resolution eigenstructure-based DOA estimation methods, such as MUSIC algorithm, have an excellent performance in ideal cases. Their performance is susceptible to noise perturbation and array error and degrade significantly when array is with error. A blind calibration method MUSIC-based is presented. It need only one RF signal generator placed in the far-field without knowledge of DOA of incidence signal. Computer simulation illustrate that the method is effective and the calibration result is perfectly.