天线阵元的位置误差会影响阵列所接收到的信号相位。基于特征值分解的DOA估计算法对信号的相位误差非常敏感,因此有必要对阵元位置误差进行校正。文中提出一种基于模拟退火算法的校正方法对阵元位置误差进行校正,其优点是所需的辅助信号源数目较少,算法稳健性较好,并且适用于任意形式的天线阵。计算机模拟结果表明该方法是有效的。

The uncertainties of array element position affect phase of received array signal.DOA estimation algorithm based on eigenvalue decomposition is very sensitive to phase error of array signal.Thus,it is necessary to calibrate signal phase error brought by array element position error.From the objective function based on signal subspace,a calibration method is put forward which can calibrate error effectively.And it can be applied to any pattern of array.The simulated results prove it is effective.

TN957