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Open AccessArticle

DOA Estimation for Coprime Linear Array Based on MI-ESPRIT and Lookup Table

State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System, National University of Defense Technology, Changsha 410073, China
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Sensors 2018, 18(9), 3043; https://doi.org/10.3390/s18093043
Received: 16 August 2018 / Revised: 2 September 2018 / Accepted: 7 September 2018 / Published: 12 September 2018
(This article belongs to the Special Issue Recent Advances in Array Processing for Wireless Applications)
In order to improve the angle measurement performance of a coprime linear array, this paper proposes a novel direction-of-arrival (DOA) estimation algorithm for a coprime linear array based on the multiple invariance estimation of signal parameters via rotational invariance techniques (MI-ESPRIT) and a lookup table method. The proposed algorithm does not require a spatial spectrum search and uses a lookup table to solve ambiguity, which reduces the computational complexity. To fully use the subarray elements, the DOA estimation precision is higher compared with existing algorithms. Moreover, the algorithm avoids the matching error when multiple signals exist by using the relationship between the signal subspace of two subarrays. Simulation results verify the effectiveness of the proposed algorithm. View Full-Text
Keywords: coprime linear array; DOA estimation; solving ambiguity; MI-ESPRIT; lookup table coprime linear array; DOA estimation; solving ambiguity; MI-ESPRIT; lookup table
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Zhang, W.; Chen, X.; Cui, K.; Xie, T.; Yuan, N. DOA Estimation for Coprime Linear Array Based on MI-ESPRIT and Lookup Table. Sensors 2018, 18, 3043.

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