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Efficient tensor decomposition method for noncircular source in colocated coprime MIMO radar |
Qian-Peng Xie(谢前朋), Xiao-Yi Pan(潘小义), Shun-Ping Xiao(肖顺平) |
National University of Defense Technology, Changsha 410073, China |
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Abstract An effective method via tensor decomposition is proposed to deal with the joint direction-of-departure (DOD) and direction-of-arrival (DOA) estimation of noncircular sources in colocated coprime MIMO radar. By decomposing the transmitter and receiver into two sparse subarrays, noncircular property of source can be used to construct new extended received signal model for two sparse subarrays. The new received model can double the virtual array aperture due to the elliptic covariance of imping sources is nonzero. To further exploit the multidimensional structure of the noncircular received model, we stack the subarray output and its conjugation according to mode-1 unfolding and mode-2 unfolding of a third-order tensor, respectively. Thus, the corresponding extended tensor model consisted of noncircular information for DOA and DOD can be obtained. Then, the higher-order singular value decomposition technique is utilized to estimate the accurate signal subspace and angular parameter can be automatically paired via the rotational invariance relationship. Specifically, the ambiguous angle can be eliminated and the true targets can be achieved with the aid of the coprime property. Furthermore, a closed-form expression for the deterministic CRB under the NC sources scenario is also derived. Simulation results verify the superiority of the proposed estimator.
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Received: 04 December 2019
Revised: 02 February 2020
Accepted manuscript online:
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PACS:
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43.60.Jn
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(Source localization and parameter estimation)
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43.60.Cg
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(Statistical properties of signals and noise)
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84.40.Xb
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(Telemetry: remote control, remote sensing; radar)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61701507, 61890542, and 61890540). |
Corresponding Authors:
Xiao-Yi Pan
E-mail: mrpanxy@nudt.edu.cn
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Cite this article:
Qian-Peng Xie(谢前朋), Xiao-Yi Pan(潘小义), Shun-Ping Xiao(肖顺平) Efficient tensor decomposition method for noncircular source in colocated coprime MIMO radar 2020 Chin. Phys. B 29 054304
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