ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Angle Estimation in MIMO Radar with Non-circular Signals Based on Real-valued ESPRIT
Received date: 2012-10-30
Revised date: 2013-05-12
Online published: 2013-05-23
Supported by
National Natural Science Foundation of China (61071163, 61071164, 61271327);A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions
In this paper, the direction of arrival (DOA) estimation in a monostatic multiple-input multiple-output (MIMO) radar is studied, and a real-valued estimation of signal parameters via rotational invariance techniques (ESPRIT) algorithm for the estimation based on non-circular (NC) signals is proposed. Through a reduced-dimensional transformation, the received data is transformed to be low-dimensional, which lead to lower complexity. Thereafter, a center-Hermitian matrix is constructed based on the characteristics of the NC real-valued signals. Then a unitary matrix is used to transform the complex computations into real-valued ones, thus further reducing the complexity. Finally, ESPRIT is employed to estimate the angles. The proposed algorithm requires no peak searching, and has lower complexity but better angle estimation performance than the NC ESPRIT and Unitary ESPRIT. The complexity of the algorithm is analyzed, and the Cramer-Rao bound (CRB) for the angle estimation in MIMO radar is derived. In the simulation, these algorithms are compared, which verifies the effectiveness of our algorithm.
HU Tong , ZHANG Gong , LI Jianfeng , ZHANG Xiaofei , BEN De . Angle Estimation in MIMO Radar with Non-circular Signals Based on Real-valued ESPRIT[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2013 , 34(8) : 1953 -1959 . DOI: 10.7527/S1000-6893.2013.0258
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