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Tensor-Based Angle Estimation Approach for Strictly Noncircular Sources with Unknown Mutual Coupling in Bistatic MIMO Radar

机译:双静态MIMO雷达中基于互互未知的严格非圆形源的基于张量的角度估计方法

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摘要

In the paper, the estimation of joint direction-of-departure (DOD) and direction-of-arrival (DOA) for strictly noncircular targets in multiple-input multiple-output (MIMO) radar with unknown mutual coupling is considered, and a tensor-based angle estimation method is proposed. In the proposed method, making use of the banded symmetric Toeplitz structure of the mutual coupling matrix, the influence of the unknown mutual coupling is removed in the tensor domain. Then, a special enhancement tensor is formulated to capture both the noncircularity and inherent multidimensional structure of strictly noncircular signals. After that, the higher-order singular value decomposition (HOSVD) technology is applied for estimating the tensor-based signal subspace. Finally, the direction-of-departure (DOD) and direction-of-arrival (DOA) estimation is obtained by utilizing the rotational invariance technique. Due to the use of both noncircularity and multidimensional structure of the detected signal, the algorithm in this paper has better angle estimation performance than other subspace-based algorithms. The experiment results verify that the method proposed has better angle estimation performance.
机译:本文研究了未知耦合的多输入多输出(MIMO)雷达中严格非圆形目标的联合出发方向(DOD)和到达方向(DOA)的估计,并考虑了张量提出了一种基于角度的角度估计方法。在提出的方法中,利用互耦合矩阵的带状对称托普利兹结构,在张量域中消除了未知互耦合的影响。然后,制定了一个特殊的增强张量,以捕获严格非圆形信号的非圆形性和固有的多维结构。之后,将高阶奇异值分解(HOSVD)技术用于估计基于张量的信号子空间。最后,利用旋转不变性技术获得出发方向(DOD)和到达方向(DOA)估计。由于使用了非圆形度和被检信号的多维结构,本文算法比其他基于子空间的算法具有更好的角度估计性能。实验结果证明,该方法具有较好的角度估计性能。

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