阵列误差对四阶MUSIC算法到达角估计的影响

子空间算法用于窄带信号到达角估计时，通常认为阵列响应是已知的。然而，在实际中，阵列响应往往偏离正常值，成为角度估计误差的重要来源之一。文中讨论阵列误差对四阶MUSIC算法估计到达角的影响，并与传统二阶MUSIC算法进行比较。结果表明：相同阵列误差时，四阶MUSIC算法的角度估计误差小于二阶MUSIC算法。

An Analysis of FO-MUSIC Algorithm in the Presence of Sensor Perturbations

Application of subspace-based algorithm to narrowband direction-of-arrive(DOA) estimation requires that the array response be known. In practice, however, the response often deviates from its nominal values, which becomes one of the important sources of the estimation errors. In this article, we analyze performance of FO-MUSIC algorithm in the presence of sensor perturbations, and then compare it with SO-MUSIC algorithm. The result shows that when the sensor perturbations are the same the error of DOA estimation of FO-MUSIC algorithm is smaller than that of SO-MUSIC algorithm.