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High frequency vibration of the platform or the targets is an inevitable problem in the field of radar imaging, and it has significant effects on the image quality, especially in the terahertz band. In this paper, a compensation method for high frequency vibration based on dominant scatterers is proposed. The essence of this method is estimation and compensation of the high frequency vibration by...
Terahertz (THz) wave has important advantages in micro motion measurement because its wavelength is shorter than that of microwave. A method for parameter estimation of micro-vibration target based on the combination of Phase-Derived-Range (PDR) and Empirical Mode Decomposition (EMD) is proposed. In this method, the displacement of the target created by vibration is obtained firstly by using the PDR...
The intricate vibration of a working vehicle provides an important signature to the vehicle type. Small vibrations introduce phase modulation in radar echoes, which is referred to as micro-Doppler (m-D) phenomenon and can be modeled as sinusoidal frequency-modulated (SFM) signal. Such phase modulation induced by vibrations consists of multiple frequency components; moreover, the modulation is usually...
Vibration signature extraction and vehicle type identification are traditional aspirations in micro-Doppler domain. Radar echoes from vibrating targets can be modeled as frequency-modulated signals, with micro stochastic Doppler components in phase item. In this work, the sinusoidal frequency modulation Fourier transform (SFMFT) in sinusoidal frequency modulated signal space is proposed, which owns...
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