SAR Imaging of Moving Target Based on Quadratic Phase Function

Chao  Wang; Shaobin  Li

doi:10.4236/jsip.2013.43B003

Chao Wang^*, Shaobin Li

Abstract: In this paper, a novel signal processing technique hasbeen developed to refocus moving targets image from their smeared responses in the Synthetic Aperture Radar (SAR) image according to the characteristics of the received signals for moving targets. Quadratic Phase Function is introduced to the parameters estimation for moving target echo and SAR imaging. Our method is available even under a low SNR environment and acquiring an exact SAR image of moving targets. The simulated results demonstrated the validity of the algorithm proposed.

Keywords: Synthetic Aperture Radar; Moving Targets; Quadratic Phase Function

Cite this paper: C. Wang and S. Li, "SAR Imaging of Moving Target Based on Quadratic Phase Function," Journal of Signal and Information Processing, Vol. 4 No. 3, 2013, pp. 14-18. doi: 10.4236/jsip.2013.43B003.

References

[1] H. S. Wang and C. Mainlobe, “Clutter Cancellation by DPCA for Space Based Radars,” IEEE Aero Space Ap-plications Conference, Crested Butte, CO, USA: IEEE, 1991. pp. 1- 128.

[2] R. Klemm, “Application of Spacetime Adaptive Processing,” The Institution of Electrical Engineers, London, 2004.

[3] T. J. Abatzog-lou, “Fast Maximum Likelihood Joint Estimation of Frequency and Frequency Rate,” IEEE Transactions on Aerospace and Electronic System, Vol. 22, No. 6, 1986, pp. 708-715. doi:10.1109/TAES.1986.310805

[4] J. C. Wood and D. T. Barry, “Linear Signal Synthesis Using the Radon-Wigner Transforms,” IEEE Transactions On Signal Processing, Vol. 42, No. 8, 1994, pp. 2105-2111. doi:10.1109/78.301845

[5] M. S. Wang, A. K. Chan and C. K. Chui, “Linear Frequency-Modulated Signal Detection Using Radon-ambiguity Transform,” Vol. 46, No. 3, 1998, pp. 571-586.

[6] R. Tao, B. Deng and Y. Wang, “Research Progress of the Fractional Fourier Transform in Signal Processing,” Science in China (Ser. F, Information Science), Vol. 49, No. 1, 2006, pp. 1-25.

[7] P. O’Shea, “A New Technique for Estimating Instantaneous Frequency Rate,” IEEE Signal Processing Letters, Vol. 9, No. 8, 2002, pp. 251-252. doi:10.1109/LSP.2002.803003

[8] P. O’Shea, “A Fast Algorithm for Estimating the Parameters of a Quadratic FM Signal,” IEEE Transactions On Signal Processing, Vol. 52, No. 2, 2004, pp. 385-393. doi:10.1109/TSP.2003.821097

[9] V. C. Chen “Time-Frequency Transforms for Radar Imaging and Signal Analysis,” Artech House. 2002.

[10] L. Hong, “Analysis of Multi-component LFM Signals by the Integrated Quadratic Phase Function,” Journal of Electronics & Information Technology, Vol. 31, No. 6, pp. 2009, pp. 1363-1366.

[11] P. Wang and J. Y. Yang, “Multicomponent Chirp Signals Analysis Using Product Cubic Phase Function,” Digital Signal Processing, Vol. 16, No. 6, 2006, pp. 654-669. doi:10.1016/j.dsp.2006.09.002