Three-Dimensional Imaging with Bistatic Vortex Electromagnetic Wave Radar

Abstract

The vortex electromagnetic wave radar based on monostatic geometry can realize the imaging of a radar target in both range dimension and azimuth dimension by adjusting vortex electromagnetic wave modes, but it has no ability to distinguish the elevation of the radar target. To achieve three-dimensional imaging of the radar target, a three-dimensional imaging method of vortex electromagnetic wave based on bistatic geometry is proposed. The echo model of the target based on vortex electromagnetic wave in bistatic geometry is constructed firstly. The elevation resolution of the target is realized, and then the three-dimensional coordinate of the target is reconstructed. Moreover, the elevation resolution and the computational complexity of the proposed method are also analyzed. Simulation results demonstrate the effectiveness of the proposed method. The results also illustrate that the array element requirements and the computational complexity of presented algorithm are less than Multiple Signal Classification (MUSIC) algorithm.

Targets’ Radial and Tangential Velocities Estimation Based on Vortex Electromagnetic Waves

“…Different from the conventional plane electromagnetic wave, by modulating the orbital angular momentum (OAM), a vortex electromagnetic wave (VEW) provides special characteristics, such as circular beam pattern [1], rotational phase front [2], and orthogonality of OAM modes [3]. In the past decade, due to these special characteristics, VEW has been widely involved in areas such as wireless communication [4][5][6], remote sensing [7][8][9][10][11][12][13][14][15][16][17], and topographical altimetry [13].…”

“…Multiple Input Multiple Output (MIMO) radar configuration was combined with VEW to improve range-vortex azimuth imaging performance [8]. Moreover, the three-dimensional imaging ability of VEW was studied in [14][15][16].…”

Micro-Motion Parameter Extraction of Multi-Scattering-Point Target Based on Vortex Electromagnetic Wave Radar

“…Over the past few years, vortex electromagnetic waves have attracted increasing attention in the fields of rotation Doppler parameter estimation [1,2], OAM modulated wireless communication [3,4], and quantum applications [5] due to their unique spiral phase structure and orthogonal characteristics [6]. In addition, when a moving target is irradiated by vortex radar, a unique wave front shows the characteristic of angular diversity and the vortex echo contains more target information, which allows electromagnetic vortex radar to be utilized to improve the accuracy of object identification [7,8].…”