Hole-Free Nested Array with Three Sub-ULAs for Direction of Arrival Estimation.

Publisher: MDPI Country of Publication: Switzerland NLM ID: 101204366 Publication Model: Electronic Cited Medium: Internet ISSN: 1424-8220 (Electronic) Linking ISSN: 14248220 NLM ISO Abbreviation: Sensors (Basel) Subsets: PubMed not MEDLINE; MEDLINE

Original Publication: Basel, Switzerland : MDPI, c2000-

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.

Sensors (Basel). 2017 Aug 03;17(8):. (PMID: 28771212)

2022M723879 China Postdoctoral Science Foundation

Keywords: degrees of freedom; difference co-array; direction of arrival estimation; hole-free nested array with three sub-ULAs; sparse array

Date Created: 20230610 Date Completed: 20230612 Latest Revision: 20230612

20231215

PMC10256018

10.3390/s23115214

37299940