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兵工学报  2015 

互耦效应下一种基于实值稀疏表示的波达方向估计算法

DOI: 10.3969/j.issn.1000-1093.2015.02.015, PP. 294-298

Keywords: 信息处理技术,波达方向估计,稀疏表示,互耦,均匀线阵

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Abstract:

?针对未知互耦条件下的波达方向(DOA)估计问题,提出了一种未知互耦条件下基于实值稀疏表示的加权子空间DOA估计算法。新算法利用一个特定的酉变换矩阵,将一个复杂的复值优化问题转化为一个实值优化问题,从而有效地将原问题的计算复杂度减少4倍以上。此外,为了进一步提高稀疏表示的估计算法估计精度,在原有l1范数优化模型基础上引入一个能使得DOA估计方差取得最小值的最优子空间加权矩阵。仿真实验表明,在低信噪比情况下,新算法能进一步提高稀疏表示的估计算法抗噪能力,获得更好的估计精度。

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