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Computationally Efficient 2D DOA Estimation for L-Shaped Array with Unknown Mutual Coupling

机译：具有未知互耦的L形阵列的计算有效2D DOA估计

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摘要

Although L-shaped array can provide good angle estimation performance and is easy to implement, its two-dimensional (2D) direction-of-arrival (DOA) performance degrades greatly in the presence of mutual coupling. To deal with the mutual coupling effect, a novel 2D DOA estimation method for L-shaped array with low computational complexity is developed in this paper. First, we generalize the conventional mutual coupling model for L-shaped array and compensate the mutual coupling blindly via sacrificing a few sensors as auxiliary elements. Then we apply the propagator method twice to mitigate the effect of strong source signal correlation effect. Finally, the estimations of azimuth and elevation angles are achieved simultaneously without pair matching via the complex eigenvalue technique. Compared with the existing methods, the proposed method is computationally efficient without spectrum search or polynomial rooting and also has fine angle estimation performance for highly correlated source signals. Theoretical analysis and simulation results have demonstrated the effectiveness of the proposed method.
机译：尽管L形阵列可以提供良好的角度估计性能并且易于实现，但是在存在相互耦合的情况下，其二维（2D）到达方向（DOA）性能会大大降低。针对相互耦合的影响，提出了一种计算复杂度低的L形阵列二维DOA估计方法。首先，我们推广了传统的L形阵列互耦模型，并通过牺牲一些传感器作为辅助元件来盲目地补偿了互耦。然后，我们两次使用传播器方法来减轻强信号源相关效应的影响。最后，通过复特征值技术无需配对即可同时实现方位角和仰角的估计。与现有方法相比，该方法计算效率高，无需频谱搜索或多项式求根，并且对于高度相关的源信号具有良好的角度估计性能。理论分析和仿真结果证明了该方法的有效性。

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  • 来源
    《Mathematical Problems in Engineering》 |2018年第2期|5454719.1-5454719.9|共9页
  • 作者

    Dong Yang-Yang; Chang Xin;

  • 作者单位

    Xidian Univ, Sch Elect Engn, Xian 710071, Shaanxi, Peoples R China;

    Xidian Univ, Sch Elect Engn, Xian 710071, Shaanxi, Peoples R China;

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