Imaging and micro-Doppler analysis of vibrating target in multi-input–multi-output synthetic aperture radar

Guanhua Zhao; Yaowen Fu; Lei Nie; Zhaowen Zhuang

Imaging and micro-Doppler analysis of vibrating target in multi-input–multi-output synthetic aperture radar

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Author(s): Guanhua Zhao ¹ ; Yaowen Fu ¹ ; Lei Nie ¹ ; Zhaowen Zhuang ¹
- Affiliations: 1: College of Electronic Science and Engineering, National University of Defense Technology, Changsha, People's Republic of China
Source: Volume 9, Issue 9, December 2015, p. 1360 – 1365
DOI: 10.1049/iet-rsn.2014.0480 , Print ISSN 1751-8784, Online ISSN 1751-8792

Received 06/11/2014, Accepted 19/05/2015, Revised 11/05/2015, Published 01/12/2015

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.

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Imaging and micro-Doppler analysis of vibrating target in multi-input–multi-output synthetic aperture radar

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