title: Computationally Efficient 2D DOA Estimation with Uniform Rectangular Array in Low-Grazing Angle.
abstract: In this paper, we propose a computationally efficient spatial differencing matrix set (SDMS) method for two-dimensional direction of arrival (2D DOA) estimation with uniform rectangular arrays (URAs) in a low-grazing angle (LGA) condition. By rearranging the auto-correlation and cross-correlation matrices in turn among different subarrays, the SDMS method can estimate the two parameters independently with one-dimensional (1D) subspace-based estimation techniques, where we only perform difference for auto-correlation matrices and the cross-correlation matrices are kept completely. Then, the pair-matching of two parameters is achieved by extracting the diagonal elements of URA. Thus, the proposed method can decrease the computational complexity, suppress the effect of additive noise and also have little information loss. Simulation results show that, in LGA, compared to other methods, the proposed methods can achieve performance improvement in the white or colored noise conditions.
authors.affiliation: Air and Missile Defense College, Air Force Engineering University, Xi'an 710051, China. 15667081720@163.com.
authors.forename: Junpeng
authors.initials: J
authors.lastname: Shi
authors.affiliation: Air and Missile Defense College, Air Force Engineering University, Xi'an 710051, China. hgp6068@163.com.
authors.forename: Guoping
authors.initials: G
authors.lastname: Hu
authors.affiliation: Electronic information college, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China. zhangxiaofei@nuaa.edu.cn.
authors.forename: Xiaofei
authors.initials: X
authors.lastname: Zhang
authors.affiliation: College of Information Science and Engineering, Shandong Agricultural University, Tai'an 271018, China. sunfg@sdau.edu.cn.
authors.forename: Fenggang
authors.initials: F
authors.lastname: Sun
authors.affiliation: Air and Missile Defense College, Air Force Engineering University, Xi'an 710051, China. xiaoyu_kgd@163.com.
authors.forename: Yu
authors.initials: Y
authors.lastname: Xiao
keywords: information loss; low-grazing angle; spatial differencing matrix set; two-dimensional direction of arrival estimation