时-空欠采样的信号频率和二维DOA估计

Frequency and 2-D DOA Estimation with Sub-Nyquist Spatial-temporal Sampling Signal

在空间信号时 -空欠采样下 ,基于时延、四阶累积量和MUSIC算法提出了一种新的多空间信号频率和 2 D到达方向分离估计方法。适当地选取时延和非均匀阵列阵元位置 ,该方法的信号频率和 2 D到达方向估计无模糊。灵活地运用矢量Kronecker积估计信号数大于二阶技术。

Based on time delay and the fourth order cumulant and MUSIC algorithm, a novel approach of estimating multiple spatial signal frequencies and 2 D directions of arrival with spatio temporal sub Nyquist sampling is proposed in this paper. With choosing signal time delay and element location of nonuniform array properly, the estimated frequencies and 2 D directions of arrival are unambiguous. Moreover, with using vector Kronecker product flexibly ,the number of estimated signal is more than the second statistics. Computer simulation confirms its effectiveness.