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A Low-Complexity Algorithm for Coherent DOA Estimation in Monostatic MIMO Radar

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Abstract

This paper investigates the topic of direction of arrival (DOA) estimation for coherent sources in monostatic multi-input multi-output (MIMO) radar, and proposes a low-complexity algorithm for coherent DOA estimation. The direction vector of MIMO radar can be firstly mapped into a vector of virtual uniform linear array (ULA), and after that, a linear operator is constructed by partial cross-correlations from the received data of the virtual ULA. Finally, the DOAs can be obtained via roots finding method based on this linear operator. The DOAs can be estimated without any eigen-decomposition, nor evaluating all correlations of the received data. The proposed algorithm has much lower complexity as well as much better angle estimation performance than conventional forward backward spatial smoothing (FBSS)-propagator method (FBSS-PM), FBSS- estimation method of signal parameters via rotational invariance techniques (FBSS-ESPRIT), FBSS- root multiple signal classification (FBSS-Root MUSIC), and ESPRIT-like algorithm. Simulations present the effectiveness and improvement of our approach.

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Acknowledgments

This work is supported by A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), China NSF Grants (61201208, 61271327, 61071164), Jiangsu Planned Projects for Postdoctoral Research Funds (1201039C), China Postdoctoral Science Foundation (2012M521099), Open project of key laboratory of underwater acoustic communication and marine information technology (Xiamen University), Hubei Key Laboratory of Intelligent Wire1ess Communications (IWC2012002), Open project of Key Laboratory of Nondestructive Testing (Nanchang Hangkong University), Open project of Key Laboratory of modern acoustic of Ministry of Education (Nanjing University), the Aeronautical Science Foundation of China(20120152001), by Qing Lan Project and the Fundamental Research Funds for the Central Universities (NZ2012010, kfjj120115, kfjj20110215).

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Authors and Affiliations

  1. College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, 210016 , Nanjing, China

    Chen Chen, Xiaofei Zhang, Han Chen & De Ben

  2. Hubei Key Laboratory of Intelligent Wireless Communications, South-Central University for Nationalities, 430074 , Wuhan, China

    Xiaofei Zhang

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  1. Chen Chen
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  2. Xiaofei Zhang
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Correspondence to Chen Chen.

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Chen, C., Zhang, X., Chen, H. et al. A Low-Complexity Algorithm for Coherent DOA Estimation in Monostatic MIMO Radar. Wireless Pers Commun 72, 549–563 (2013). https://doi.org/10.1007/s11277-013-1029-8

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