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Novel Diagonal Reloading Based Direction of Arrival Estimation in Unknown Non-Uniform Noise

机译：未知非均匀噪声中基于新颖对角线重载的到达方向估计

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摘要

Nested array can expand the degrees of freedom (DOF) from difference coarray perspective, but suffering from the performance degradation of direction of arrival (DOA) estimation in unknown non-uniform noise. In this paper, a novel diagonal reloading (DR) based DOA estimation algorithm is proposed using a recently developed nested MIMO array. The elements in the main diagonal of the sample covariance matrix are eliminated; next the smallest MN-K eigenvalues of the revised matrix are obtained and averaged to estimate the sum value of the signal power. Further the estimated sum value is filled into the main diagonal of the revised matrix for estimating the signal covariance matrix. In this case, the negative effect of noise is eliminated without losing the useful information of the signal matrix. Besides, the degrees of freedom are expanded obviously, resulting in the performance improvement. Several simulations are conducted to demonstrate the effectiveness of the proposed algorithm.
机译：从差异协同阵列的角度来看，嵌套阵列可以扩展自由度（DOF），但是在未知的非均匀噪声中会受到到达方向（DOA）估计性能的降低。在本文中，使用最近开发的嵌套MIMO阵列提出了一种新颖的基于对角线重载（DR）的DOA估计算法。样本协方差矩阵的主对角线上的元素被消除；接下来，获得修正后的矩阵的最小MN-K个特征值，并将其平均以估计信号功率的总和。此外，将估计的和值填充到修正矩阵的主对角线中，以估计信号协方差矩阵。在这种情况下，消除了噪声的负面影响，而不会丢失信号矩阵的有用信息。此外，自由度明显扩大，从而提高了性能。进行了一些仿真，以证明所提出算法的有效性。

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  • 来源
    《Mathematical Problems in Engineering》 |2018年第6期|3084516.1-3084516.9|共9页
  • 作者

    Zhou Hao; Hu Guoping; Shi Junpeng; Feng Ziang;

  • 作者单位

    Air Force Engn Univ, Air & Missile Def Coll, Xian, Shaanxi, Peoples R China;

    Air Force Engn Univ, Air & Missile Def Coll, Xian, Shaanxi, Peoples R China;

    Air Force Engn Univ, Air & Missile Def Coll, Xian, Shaanxi, Peoples R China;

    Air Force Engn Univ, Air & Missile Def Coll, Xian, Shaanxi, Peoples R China;

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