非圆实信号MIMO雷达中基于实值ESPRIT的角度估计

doi:10.7527/S1000-6893.2013.0258

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2013, Vol. 34 ›› Issue (8): 1953-1959.doi: 10.7527/S1000-6893.2013.0258

• Electronics and Control • Previous Articles Next Articles

Angle Estimation in MIMO Radar with Non-circular Signals Based on Real-valued ESPRIT

HU Tong, ZHANG Gong, LI Jianfeng, ZHANG Xiaofei, BEN De

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

Received:2012-10-30 Revised:2013-05-12 Online:2013-08-25 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

Abstract

Abstract:

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.

Key words: multiple-input multiple-output radar, non-circular signal, angle estimation, ESPRIT, Cramer-Rao bound

CLC Number:

V243.2

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.

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Angle Estimation in MIMO Radar with Non-circular Signals Based on Real-valued ESPRIT

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