累量域虚拟阵列二维波达方向估计算法
Cumulant-Based Virtual Array 2-D Direction of Arrival Estimation
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摘要: 利用空间四阶累量的孔径扩展性质,构造了一种新的累量域虚拟阵列波达方向矩阵。由累量域虚拟阵列波达方向矩阵非零特征值的幅值和相位即可分别估计出信号源的方位角和俯仰角。本算法阵元利用率高,阵列布置灵活,由于采用了累量,通过适当布置阵列可压制任意分布噪声,获得较好的估计效果。Abstract: A new type cumulant-based virtual DOA matrix is formed using the property of aperture extension of fourth-order cumulants. The azimuth and elevation of the incident sources can be estimated simultaneity from the amplitude and phase information of non-zero eigenvalue of the new matrix respectively. With arbitrary geometry of the array, this method can extend actual array aperture efficiently. By properly laying out the array, this algorithm can suppress arbitrary distributed background noise and better estimation of DOA can be obtained.
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