Abstract
The numerical calculation of forward scatter Shadow Inverse Synthetic Aperture Radar (SISAR) imaging is usually performed by the Fresnel numerical integral which is complicated and time consuming. To improve the calculation speed, the fast SISAR imaging method is investigated. Firstly, a fast imaging method based on the Fast Fourier Transform (FFT) is proposed while the phase errors introduced by the FFT are compensated. Then, through the analysis of the spectrum on the motion compensated signal, the sampling law for SISAR imaging is given, indicating that signals used for imaging can be sampled at a rate much lower than the Nyquist sampling rate. Simulation results show that the proposed fast imaging method can give accurate profiles and significantly reduce the computation, which is of practical meaning in engineering application.
Original language | English |
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Pages (from-to) | 2294-2299 |
Number of pages | 6 |
Journal | Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology |
Volume | 37 |
Issue number | 10 |
DOIs | |
Publication status | Published - 1 Oct 2015 |
Keywords
- Fast Fourier Transform (FFT)
- Forward scatter radar
- Nyquist sampling rate
- Phase compensation
- Shadow Inverse Synthetic Aperture Radar (SISAR)