NDLI: Combined root-MUSIC algorithms for multi-carrier MIMO radar with sparse uniform linear arrays

Content Provider	IET Digital Library
Author	Liu, Aihua Zhang, Xin Yang, Qiang Wu, Xiao Chuan Deng, Weibo
Abstract	In this study, sparse uniform linear arrays are used to improve the direction-of-arrival (DOA) estimation accuracy for the multiple-input multiple-output radar. With a suitable choice of multi-carrier frequencies, the DOA estimation ambiguity problem caused by spatial under-sampling can be resolved. Two kinds of search-free DOA estimation algorithms based on root-multiple signal classification (MUSIC) are proposed. The first algorithm directly applies the root-MUSIC to each carrier frequency separately for the true DOAs as well as their spurious DOAs, then, a novel DOA replicas matching algorithm is proposed to obtain the true DOAs from the ambiguous ones. The second algorithm utilises the manifold separation technique (MST) to align the noise subspaces of all multi-carrier frequencies. Using the MST, the separable representation of the array manifold vector of each carrier frequency is obtained, then the root-MUSIC polynomials of all multi-carrier frequencies are combined to construct a new polynomial, the true DOAs can be obtained directly by applying polynomial rooting without any matching processing. The two proposed algorithms are both practical, computationally efficient and robust. Numerical simulations verify the effectiveness of the proposed algorithms in terms of root-mean-squared error.
Starting Page	89
Ending Page	97
Page Count	9
ISSN	17518784
Volume Number	13
e-ISSN	17518792
Issue Number	Issue 1, Jan (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rsn/13/1
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rsn.2018.5207
Journal	IET Radar, Sonar & Navigation
Publisher Date	2018-09-13
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Algebra Array Manifold Vector Array Signal Processing Carrier Frequency Combined Root-MUSIC Algorithm Direction of Arrival Estimation Direction-of-arrival Estimation Accuracy DOA Estimation Ambiguity Problem Interpolation And Function Approximation Manifold Separation Technique MIMO Radar Multicarrier Frequency Multicarrier MIMO Radar Multiple-input Multiple-output Radar Novel DOA Numerical Analysis Polynomial Polynomial Rooting Root-mean-squared Error Root-multiple Signal Classification Root-MUSIC Polynomials Search-free DOA Estimation Algorithm Signal Classification Signal Processing And Detection Signal Processing Theory Sparse Uniform Linear Array Spurious DOAs
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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