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A Real-Valued 2D DOA Estimation Algorithm of noncircular signal via Euler Transformation and Rotational Invariance Property

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Transactions of Nanjing University of Aeronautics and Astronautics 2018年第3期35卷 437-448页

作者： Chen Xueqiang Wang Chenghua Zhang Xiaofei Key Laboratory of Radar Imaging and Microwave Photonics Nanjing University of Aeronautics and Astronautics College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics

The problem of two-dimensional(2 D)direction of arrival(DOA)estimation for double parallel uniform linear arrays is investigated in this paper.A real-valued DOA estimation algorithm of noncircular(NC)signal is proposed,which combines the Euler transformation and rotational invariance(RI)property between *** this work,the effective array aperture is doubled by exploiting the noncircularity of *** complex arithmetic is converted to real arithmetic via Euler *** main contribution of this work is not only extending the NC-Euler-ESPRIT algorithm from uniform linear array to double parallel uniform linear arrays,but also constructing a new 2 Drotational invariance property between subarrays,which is more complex than that in NCEuler-ESPRIT *** proposed 2 DNC-Euler-RI algorithm has much lower computational complexity than2 DNC-ESPRIT *** proposed algorithm has better angle estimation performance than 2 DESPRIT algorithm and 2 D NC-PM algorithm for double parallel uniform linear arrays,and is very close to that of 2 D NC-ESPRIT *** elevation angles and azimuth angles can be obtained with automatically *** proposed algorithm can estimate up to 2(M-1)sources,which is two times that of 2 D ESPRIT ***-Rao bound(CRB)of noncircular signal is derived for the proposed *** complexity comparison is also ***,simulation results are presented to illustrate the effectiveness and usefulness of the proposed algorithm.

关键词： array signal processing direction of arrival(DOA)estimation noncircular signal Euler transformation

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Efficient tensor decomposition method for noncircular source in colocated coprime MIMO radar

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Chinese Physics B 2020年第5期29卷 333-345页

作者： Qian-Peng Xie Xiao-Yi Pan Shun-Ping Xiao National University of Defense Technology Changsha 410073China

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 *** 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 *** new received model can double the virtual array aperture due to the elliptic covariance of imping sources is *** 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,***,the corresponding extended tensor model consisted of noncircular information for DOA and DOD can be ***,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 ***,the ambiguous angle can be eliminated and the true targets can be achieved with the aid of the coprime ***,a closed-form expression for the deterministic CRB under the NC sources scenario is also *** results verify the superiority of the proposed estimator.

关键词： colocated coprime MIMO radar noncircular signal tensor decomposition DOD and DOA estimation

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