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arXiv 2103.03244eess.SP
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基于任意线阵的宽带信号超分辨DOA估计

Super-Resolution DOA Estimation for Wideband Signals using Arbitrary Linear Arrays without Focusing Matrices

Milad Javadzadeh Jirhandeh, Mohammad Hossein Kahae

摘要:

基于无网格稀疏概念,提出了一种有效的宽带信源波达方向(DOA)估计方法。先前的相干方法已经通过将宽带频率划分为几个子带而被设计,这些子带使用聚焦矩阵被转移到参考子带。在这项工作中,相对于以前的技术,我们提出了一个凸优化问题,导致准确的宽带DOA估计方法,不需要任何聚焦矩阵。该方法不需要初始波达方向估计,适用于任意线阵。数值仿真结果表明,与一些著名的技术相比,该方法产生突出的精度和更好的鲁棒性噪声。该方法的有效性也得到了验证,在存在紧密相邻的源。

英文摘要:

We focus on developing an effective Direction Of Arrival (DOA) estimation method for wideband sources based on the gridless sparse concept. Previous coherent methods have been designed by dividing wideband frequencies into a few subbands which are transferred to a reference subband using focusing matrices. In this work, as opposed to the previous techniques, we propose a convex optimization problem that leads to an accurate wideband DOA estimation method with no need for any focusing matrix. Moreover, in this method, no initial DOA estimates are required and it can be used for any arbitrary linear arrays. Numerical simulations show that in comparison to some well-known techniques, the proposed method generates outstanding accuracy and better robustness to noise. The effectiveness of the method is also verified in presence of close adjacent sources.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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