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Title: Direction of Arrival Estimation for MIMO Radar via Unitary Nuclear Norm Minimization
Authors: Wang, Xianpeng
Huang, Mengxing
Wu, Xiaoqin
Bi, Guoan
Keywords: Multiple-input Multiple-output Radar
Noncircular Signal
Issue Date: 2017
Source: Wang, X., Huang, M., Wu, X., & Bi, G. (2017). Direction of Arrival Estimation for MIMO Radar via Unitary Nuclear Norm Minimization. Sensors, 17(4), 939-.
Series/Report no.: Sensors
Abstract: In this paper, we consider the direction of arrival (DOA) estimation issue of noncircular (NC) source in multiple-input multiple-output (MIMO) radar and propose a novel unitary nuclear norm minimization (UNNM) algorithm. In the proposed method, the noncircular properties of signals are used to double the virtual array aperture, and the real-valued data are obtained by utilizing unitary transformation. Then a real-valued block sparse model is established based on a novel over-complete dictionary, and a UNNM algorithm is formulated for recovering the block-sparse matrix. In addition, the real-valued NC-MUSIC spectrum is used to design a weight matrix for reweighting the nuclear norm minimization to achieve the enhanced sparsity of solutions. Finally, the DOA is estimated by searching the non-zero blocks of the recovered matrix. Because of using the noncircular properties of signals to extend the virtual array aperture and an additional real structure to suppress the noise, the proposed method provides better performance compared with the conventional sparse recovery based algorithms. Furthermore, the proposed method can handle the case of underdetermined DOA estimation. Simulation results show the effectiveness and advantages of the proposed method.
ISSN: 1424-8220
DOI: 10.3390/s17040939
Rights: © 2017 by The Author(s). Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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