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| The airborne sar moving target detection based on fractional fourier transform |
| Sun Hongbo; Gu Hong;Su Weimin; Liu Guosui |
| Res. Center of Electron. Eng. Tech., Nanjing Univ. of Sci. and Tech., Nanjing 210094 China |
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Abstract In this paper, the signal model of airborne SAR moving target echo is constructed firstly, which is a chirp signal naturally. According to this feature, a new technique of SAR moving target detection based on fractional Fourier transform is proposed. The effects of coupling in time-frequency domain on signal detection are eliminated. Compare with the bilinear time-frequency distribution algorithms, the fractional Fourier transform is a linear operator, and it will not affected by the intercross terms when multiple moving targets exist. The simulation results validate the effectiveness of this technique.
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Received: 09 April 2001
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2002, Vol. 24 
