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- W4378904788 abstract "Sparse arrays are of deep concern due to their ability to identify more sources than the number of sensors, among which the hole-free difference co-array (DCA) with large degrees of freedom (DOFs) is a topic worth discussing. In this paper, we propose a novel hole-free nested array with three sub-uniform line arrays (NA-TS). The one-dimensional (1D) and two-dimensional (2D) representations demonstrate the detailed configuration of NA-TS, which indicates that both nested array (NA) and improved nested array (INA) are special cases of NA-TS. We subsequently derive the closed-form expressions for the optimal configuration and the available number of DOFs, concluding that the DOFs of NA-TS is a function of the number of sensors and the number of the third sub-ULA. The NA-TS possesses more DOFs than several previously proposed hole-free nested arrays. Finally, the superior direction of arrival (DOA) estimation performance based on the NA-TS is supported by numerical examples." @default.
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- W4378904788 date "2023-05-30" @default.
- W4378904788 modified "2023-10-16" @default.
- W4378904788 title "Hole-Free Nested Array with Three Sub-ULAs for Direction of Arrival Estimation" @default.
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- W4378904788 doi "https://doi.org/10.3390/s23115214" @default.
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