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arXiv 1812.03091eess.SP
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非均匀阵列测向的分析与设计

Analysis and Design of Nonuniform Arrays for Direction Finding

Elie Bou Daher

摘要:

本研究的目的是采用非均匀阵列在不同的有源和无源传感应用的窄带和宽带操作,同时提供了大量的阵列处理方法,以帮助处理遇到的不同挑战。研究了非均匀阵列的波达方向估计问题。处理的不同的挑战包括减少可用的自由度(DOFs),相干目标的存在下,在实际的天线阵列的互耦效应。利用多频操作来增加自由度,可用于DOA估计使用高分辨率子空间和稀疏重建技术。此外,提出了一种基于稀疏性的内插技术来实现具有增加自由度的DOA估计。在此基础上,提出了一种窄带信号平台下基于稀疏重构和有源非均匀阵列的相干非相关混合目标DOA估计方法。上述方法处理理想的操作场景。为了解决一个更实际的情况下,各种方法的DOA估计使用非均匀阵列中存在的互耦。广泛的数值模拟验证不同的方法也包括在内。

英文摘要:

The purpose of this research is to employ non-uniform arrays in different active and passive sensing applications for both narrowband and wideband operations, while providing a multitude of array processing methodologies that assist in dealing with the different encountered challenges. The problem of direction-of-arrival (DOA) estimation using non-uniform arrays is considered. The different challenges that are treated include the reduction of the available degrees-of-freedom (DOFs), the presence of coherent targets, and the mutual coupling effect in practical antenna arrays. Multi-frequency operation is exploited to increase the DOFs that are available for DOA estimation using both high-resolution subspace and sparse reconstruction techniques. In addition, a sparsity-based interpolation technique is presented to perform DOA estimation with increased DOFs. Moreover, a DOA estimation approach for a mixture of coherent and uncorrelated targets based on sparse reconstruction and active non-uniform arrays under narrowband signal platform is proposed. The aforementioned approaches deal with ideal operational scenarios. To address a more practical scenario, various methods for DOA estimation using non-uniform arrays in the presence of mutual coupling are presented. Extensive numerical simulations which validate the different proposed methods are also included.

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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