title: A Fast Algorithm for 2D DOA Estimation Using an Omnidirectional Sensor Array.
abstract: The traditional 2D MUSIC algorithm fixes the azimuth or the elevation, and searches for the other without considering the directions of sources. A spectrum peak diffusion effect phenomenon is observed and may be utilized to detect the approximate directions of sources. Accordingly, a fast 2D MUSIC algorithm, which performs azimuth and elevation simultaneous searches (henceforth referred to as AESS) based on only three rounds of search is proposed. Firstly, AESS searches along a circle to detect the approximate source directions. Then, a subsequent search is launched along several straight lines based on these approximate directions. Finally, the 2D Direction of Arrival (DOA) of each source is derived by searching on several small concentric circles. Unlike the 2D MUSIC algorithm, AESS does not fix any azimuth and elevation parameters. Instead, the adjacent point of each search possesses different azimuth and elevation, i.e., azimuth and elevation are simultaneously searched to ensure that the search path is minimized, and hence the total spectral search over the angular field of view is avoided. Simulation results demonstrate the performance characters of the proposed AESS over some existing algorithms.
authors.affiliation: School of Information Science and Technology, Northwest University, Xi'an 710127, China. weikenie@163.com.
authors.forename: Weike
authors.initials: W
authors.lastname: Nie
authors.affiliation: School of Electro-Mechanical Engineering, Xidian University, Xi'an 710071, China. kjxu@stu.xidian.edu.cn.
authors.forename: Kaijie
authors.initials: K
authors.lastname: Xu
authors.affiliation: National Laboratory of Radar Signal Processing, Xidian University, Xi'an 710071, China. dzfeng@xidian.edu.cn.
authors.forename: Dazheng
authors.initials: D
authors.lastname: Feng
authors.affiliation: School of Information Science and Technology, Northwest University, Xi'an 710127, China. chase.wu@njit.edu.|Department of Computer Science, New Jersey Institute of Technology, Newark, NJ 07102, USA. chase.wu@njit.edu.
authors.forename: Chase Qishi
authors.initials: CQ
authors.lastname: Wu
authors.affiliation: School of Information Science and Technology, Northwest University, Xi'an 710127, China. houaiqin@nwu.edu.cn.
authors.forename: Aiqin
authors.initials: A
authors.lastname: Hou
authors.affiliation: School of Information Science and Technology, Northwest University, Xi'an 710127, China. yinxy@nwu.edu.cn.
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Yin
keywords: 2D MUSIC; Direction of Arrival estimation; fast algorithm; sensor array; spectrum peak diffusion effect