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| Target Detection and Range Estimation Based on Time-frequency Analysis and Correlation Coefficient Calculation |
| DU Chenyang, SHEN Junyi, LIU Yangyang, LI Chen, CHEN Chen |
| Shanghai Electro-Mechanical Engineering Institute, Shanghai 201109, China |
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Abstract This paper describes a kind of motion estimation algorithm for detecting low-altitude slow and small target (LSS-target) in heavy clutter environment. The algorithm combines 2-D fast Fourier transform (2-D FFT) and time-frequency analysis to analyze target's echo, and calculates the correlation coefficient of target and heavy clutter environment to detect motionless target. After aforementioned procedure, a time-velocity/range image of the target in heavy clutter environment is obtained. The results of time-frequency analysis and correlation coefficient calculation are used in range extrapolation to calculate low-acceleration target's range information. The feasibility of the algorithm put forward in this paper is verified in an experiment.
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Received: 23 June 2020
Published: 30 September 2020
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2020, Vol. 3 
