Title :
Imaging and micro-Doppler analysis of vibrating target in multi-input–multi-output synthetic aperture radar
Author :
Guanhua Zhao ; Yaowen Fu ; Lei Nie ; Zhaowen Zhuang
Author_Institution :
Coll. of Electron. Sci. & Eng., Nat. Univ. of Defense Technol., Changsha, China
Abstract :
The micro-Doppler (m-D) signature induced by the micro-motion dynamics of a component or structure on a radar target can provide additional information for classification, recognition, and identification of the object. Since the m-D signature from conventional synthetic aperture radar (SAR) is insufficient for further application, attention centred on multi-input-multi-output (MIMO) SAR. MIMO SAR employs diversity to improve SAR performance and shows great potential in applications including high-resolution wide-swath remote sensing, slow moving target detection, and three-dimensional (3D) imaging. Take vibration for research, because vibration is a basic kind of micro-motion and it occurs commonly such as vehicle engine. In this study, the vibration signal modelling is deduced and the m-D signature of vibrating target is analysed, based on short-term shift-orthogonal waveform in MIMO SAR. Simulations verify the influence of vibration parameters on imaging and time-frequency profile and show the m-D signature difference through different MIMO channels. The results demonstrate the potential of MIMO SAR for 3D micro-motion estimation.
Keywords :
Doppler radar; MIMO radar; object detection; radar detection; remote sensing by radar; synthetic aperture radar; time-frequency analysis; vibrations; wireless channels; 3D imaging; MIMO SAR; MIMO channels; high resolution wide swath remote sensing; m-D signature analysis; micro-Doppler analysis; micromotion dynamics; moving target detection; multiple input multiple output; shift-orthogonal waveform; synthetic aperture radar; time-frequency analysis; vibrating target analysis; vibration parameters; vibration signal modelling;
Journal_Title :
Radar, Sonar Navigation, IET
DOI :
10.1049/iet-rsn.2014.0480