期刊
IEEE COMMUNICATIONS LETTERS
卷 23, 期 12, 页码 2224-2228出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LCOMM.2019.2947585
关键词
Sparse array configuration; enhanced nested array; difference co-array; degrees of freedom; direction-of-arrival estimation
资金
- High Level Talent Research Starting Project of Jinling Institute of Technology [jit-b-201724]
- Natural Science Foundation of Jiangsu Province [BK20161104]
- Six Talent Peaks Project in Jiangsu Province [DZXX-022]
In this letter, we propose an enhanced nested array (ENA) configuration consisting of two uniform linear arrays (ULAs) with different separations and an additional sensor, whose resulting difference co-array (DCA) is hole-free. As compared with most of the existing sparse array configurations, the proposed ENA has simple closed-form expressions for array geometry and degrees of freedom (DOF), and also can provide more consecutive DOF and larger array aperture. Based on the above good properties of the ENA, compressive sensing (CS) approach is employed for direction-of-arrival (DOA) estimation by solving an l1-norm minimization problem. The theoretical propositions are proved and numerical simulations are performed to demonstrate the superior performance of the proposed ENA.
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