Detection on micro-Doppler effect based on 1550 nm laser coherent radar |
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| Affiliation: | 1. National High Magnetic Field Laboratory, Tallahassee, FL 32304, United States;2. Dept. of Chemical Engineering and Materials Science, University of California, Davis, CA 95616, United States;3. Dept. of Geological Sciences, Stanford University, Stanford, CA 94305, United States;1. Graduate School of Engineering, Tohoku University, Sendai 980-8577, Japan;2. Institute of Fluid Science, Tohoku University, Sendai 980-8577, Japan;3. Department of Energy and Resources Engineering, College of Engineering, Peking University, Beijing 100871, China |
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| Abstract: | A laser coherent detection system of 1550 nm wavelength was presented, and experimental research on detecting micro-Doppler effect in a dynamic target was developed. In this paper, the return signal in the time domain is decomposed into a set of components in different wavelet-scales by multi-resolution analysis, and the components are associated with the vibrational motions in a target. The micro-Doppler signatures are extracted by applying the reconstruction (inverse wavelet transform). During the course of the final data processing frequency analysis and time–frequency analysis are applied to analyze the vibrational signals and estimate the motion parameters successfully. The experimental results indicate that the micro-Doppler information in a moving can be effectively detected, and tiny vibrational signatures also can be acquired effectively by wavelet multi-resolution analysis and time–frequency analysis. |
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| Keywords: | Micro-Doppler effect Laser coherent radar Multi-resolution analysis Time–frequency analysis |
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