2009•Laser TechnologyRequires access
Study of self-mixing interference signal processing based on time-frequency analysis
Qiao Liu
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Abstract
To overcome the limitation of fringe counting and phase analysis,a new method based on the time-frequency analysis is proposed to process the self-mixing interference signal.The frequency of the self-mixing interference signal is acquired by time-frequency analysis,and this frequency is equal to the Doppler shift,so the velocity of external object is gained easily.The simulation experiments show that the proposed method is very easy,effective,and accurate.