Time-frequency characteristics based motion estimation and imaging for high speed spinning targets via narrowband waveforms

• Published in: Science China. Information sciences 2010-08, Vol.53 (8), p.1628-1640
• Main Authors: Zhang, Lei, Li, YaChao, Liu, Yan, Xing, MengDao, Bao, Zheng
• Format: Article
• Language: English
• Subjects: Coherence; Computer Science; Doppler effect; Frequency spectrum; High speed; Imaging; Information Systems and Communication Service; Mathematical models; Motion compensation; Motion simulation; Narrowband; Parameter estimation; Radar imaging; Research Papers; Signal to noise ratio; Spinning; Synthetic aperture radar; Time-frequency analysis; Translational motion; Waveforms; 时频特征; 目标成像; 运动估计; 运动补偿技术; 逆合成孔径雷达; 高速旋转
• ISSN: 1674-733X; 1869-1919
• DOI: 10.1007/s11432-010-4027-4

This paper focuses on the motion parameters estimation and inversed synthetic aperture radar （ISAR） imaging for the high-speed spinning targets via the time-frequency characteristics. Assuming that the translational motion is compensated with the available motion compensation techniques, then the residual part of translational motion and the spinning motion are estimated with high precision based on the timefrequency characteristics. Combining with the procedure of the motion estimation, a novel coherent timefrequency spectrum intensity redistribution method, coherent single range Doppler interferometry （CSRDI）, is proposed, which provides higher resolution and sustain lower signal to noise rate （SNR） than the current approach. Numerical simulation confirms the validity and high precision of the proposed approaches.