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Wideband Gaussian Source Processing Using a Linear Nested Array
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DOI：10.1109/LSP.2013.2281514.png)
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Abstract
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Based on a recently proposed linear nested array, we consider the problem of source number detection and direction of arrival estimation for wideband Gaussian sources. This array provides O(N-2) degrees of freedom wit O(N) sensors, enabling us to estimate K sources with N < K sensors. To employ the nested array for the wideband case, we propose effective strategies to apply nested-array processing to each frequency component, and combine all the spectral information of various frequencies to conduct the detection and estimation. In particular, for source detection, we propose a novel approach employing the idea of ensemble, used in machine learning and statistics. Numerical simulations demonstrate the advantages of our strategies.
Keywords:
Direction of arrival estimation
ensemble
nested array
source number detection
wideband source
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