Narrowband Radar Imaging and Scaling for Space Targets

• Published in: IEEE geoscience and remote sensing letters Vol. 14; no. 6; pp. 946 - 950
• Main Authors: Luo, Ying, Chen, Yong-an, Sun, Yu-xue, Zhang, Qun
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 01.06.2017; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antennas; Echoes; Fourier transforms; Imaging; Imaging techniques; Information processing; Interferometry; Methods; Micro-Doppler effect; multiantenna interferometric processing; Narrowband; narrowband radar; Radar; Radar antennas; Radar imaging; Scaling; Signal processing; space targets; Spaceborne radar; Target recognition; Time-frequency analysis
• ISSN: 1545-598X; 1558-0571
• DOI: 10.1109/LGRS.2017.2688702

Based on the narrowband radar, an imaging method for space targets is proposed in this letter, which is named as single-range interferometric imaging. First, the theory of space target echo signal interferometric processing in narrowband radar is explained. Then, through conducting short-time Fourier transform on the echo signal received by three antennas, the curves on time-frequency plane correspond to different scatterers are effectively extracted and separated and the interferometric phase of different scatterers is obtained. Finally, 2-D imaging for space target is realized. Compared to existing methods, only a single multiantenna radar is needed to obtain the 2-D image of target with accurate scaling result. The simulation results under different occasions have confirmed the effectiveness of the proposed method.