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Sensors 2014, 14(8), 14411-14422; doi:10.3390/s140814411

A Unitary ESPRIT Scheme of Joint Angle Estimation for MOTS MIMO Radar

State Key Laboratory of Integrated Services Networks, School of Electronic Engineering, Xidian University, No.2 Taibai South Road, Xi'an 710071, China
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Received: 22 May 2014 / Revised: 24 June 2014 / Accepted: 24 June 2014 / Published: 7 August 2014
(This article belongs to the Section Physical Sensors)
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Abstract

The transmit array of multi-overlapped-transmit-subarray configured bistatic multiple-input multiple-output (MOTS MIMO) radar is partitioned into a number of overlapped subarrays, which is different from the traditional bistatic MIMO radar. In this paper, a new unitary ESPRIT scheme for joint estimation of the direction of departure (DOD) and the direction of arrival (DOA) for MOTS MIMO radar is proposed. In our method, each overlapped-transmit-subarray (OTS) with the identical effective aperture is regarded as a transmit element and the characteristics that the phase delays between the two OTSs is utilized. First, the measurements corresponding to all the OTSs are partitioned into two groups which have a rotational invariance relationship with each other. Then, the properties of centro-Hermitian matrices and real-valued rotational invariance factors are exploited to double the measurement samples and reduce computational complexity. Finally, the close-formed solution of automatically paired DOAs and DODs of targets is derived in a new manner. The proposed scheme provides increased estimation accuracy with the combination of inherent advantages of MOTS MIMO radar with unitary ESPRIT. Simulation results are presented to demonstrate the effectiveness and advantage of the proposed scheme. View Full-Text
Keywords: MOTS MIMO; DOD and DOA estimation; OTS; Unitary ESPRIT MOTS MIMO; DOD and DOA estimation; OTS; Unitary ESPRIT
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Wen, C.; Shi, G. A Unitary ESPRIT Scheme of Joint Angle Estimation for MOTS MIMO Radar. Sensors 2014, 14, 14411-14422.

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