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

• DOI: 10.3390/s18093043
• Publication Date: 2018-09-12T14:26:36Z
• Authors: Weike Zhang; Xi Chen; Kaibo Cui; Tao Xie; Naichang Yuan
• Keywords: Coprime integers; Rotational invariance; Lookup table; Direction of arrival; Signal subspace; SIGNAL (programming language)

In order to improve the angle measurement performance of a coprime linear array, this paper proposes novel direction-of-arrival (DOA) estimation algorithm for array based on multiple invariance signal parameters via rotational techniques (MI-ESPRIT) and lookup table method. The proposed does not require spatial spectrum search uses solve ambiguity, which reduces computational complexity. To fully use subarray elements, DOA precision is higher compared with existing algorithms. Moreover, avoids matching error when signals exist by using relationship between subspace two subarrays. Simulation results verify effectiveness algorithm.