Three-dimensional Multiple-Input Multiple-Output Radar Imaging Method Based on Integration of Multi-snapshot Images

• Published in: Journal of radars = Lei da xue bao Vol. 9; no. 4; pp. 739 - 752
• Main Authors: Tong ZHENG, Libing JIANG, Zhuang WANG
• Format: Journal Article
• Language: English
• Published: China Science Publishing & Media Ltd. (CSPM) 01.09.2020
• Subjects: doppler linear fitting; multi-snapshot images integration; multiple-input multiple-output (mimo) radar; multiple-input multiple-output inverse synthetic aperture radar (mimo-isar) imaging; three-dimensional imaging
• ISSN: 2095-283X
• DOI: 10.12000/JR19069

To improve the cross-range resolution of three-dimensional (3-D) images obtained along the direction of movement by Multiple-Input Mmultiple-Output (MIMO) radar, a novel MIMO-ISAR 3-D imaging method that combines multi-snapshot images is proposed. This method integrates multiple single-snapshot 3-D images acquired by a planar antenna array during a specific period of observation and extracts the peak slice along the linear fitting direction of the scatterers to construct a new 3-D image. The simulation results demonstrated that the proposed method significantly improves the cross-range resolution of the imaging results along the direction of movement compared with other methods based on single-snapshot 3-D images. Additionally, compared with the classical MIMO-ISAR method based on rearrangement and interpolation, this method is suitable for both fast-moving and slow-moving targets. Moreover, the imaging results are well focused and the side lobes along the direction of movement are effectively suppressed.