基于GA的阵列幅相误差校正新方法

Array gain and phase error correction based on GA

研究了在单、多信源入射条件下并存在幅相误差时,用MUSIC算法对信号到达方向进行估测的问题。针对一般方法对均匀细阵误差测不准、对信源数限制较严等问题,提出了一种利用遗传算法来估测阵列幅相误差的方法。该方法适用于任意阵列,放宽了对信源数的限制,在估测幅相误差的基础上对原导向矢量进行了修正,得到了更为准确的信号到达方向估计值。计算机仿真结果验证了此方法的有效性和可行性。

This paper studies the problem of direction finding using MUSIC algorithm in the presence of sensor gain and phase uncertainties when one or several signals impinge on. For many methods that have been raised, the array errors in the uniform linear array （ULA） are difficult to estimate and the number of the signals is restricted hard. A novel algorithm based on the genetic algorithm （GA） is proposed for the estimations of uniform linear array gain and phase uncertainties. The method here can be used in any array manifold and relaxes the limit to the signal number. The steering vector is modified to get the more accurate DoA of the signals. The simulation results are presented to show the feasibility and validity of the algorithm proposed.