Wang Yu, Wang Bin, Zhang Zhi-min, Deng Yun-kai. The Research and Application of Modified Wavenumber Domain Algorithm to Real-time Processing[J]. Journal of Electronics & Information Technology, 2008, 30(6): 1321-1325. doi: 10.3724/SP.J.1146.2006.01862
Citation:
Wang Yu, Wang Bin, Zhang Zhi-min, Deng Yun-kai. The Research and Application of Modified Wavenumber Domain Algorithm to Real-time Processing[J]. Journal of Electronics & Information Technology, 2008, 30(6): 1321-1325. doi: 10.3724/SP.J.1146.2006.01862
Wang Yu, Wang Bin, Zhang Zhi-min, Deng Yun-kai. The Research and Application of Modified Wavenumber Domain Algorithm to Real-time Processing[J]. Journal of Electronics & Information Technology, 2008, 30(6): 1321-1325. doi: 10.3724/SP.J.1146.2006.01862
Citation:
Wang Yu, Wang Bin, Zhang Zhi-min, Deng Yun-kai. The Research and Application of Modified Wavenumber Domain Algorithm to Real-time Processing[J]. Journal of Electronics & Information Technology, 2008, 30(6): 1321-1325. doi: 10.3724/SP.J.1146.2006.01862
Wavenumber Domain Algorithm (WDA), as a superior SAR signal processing algorithm, is widely applied to the case of wide aperture and high squint angle. However, Interpolation in the 2-dimensional frequency domain is necessary and the motion compensation can not be integrated, so it can not be implemented easily in the real-time processing. In this paper, two modified version of WDA are exploited: one is fit for low-accurate processing, in which the residual Range Cell Migration (RCM) is ignored to improve the processing efficiency; Another is fit the high-accurate processing, in which the FRactional Fourier Transform (FRFT) is employed to correct residual RCM. The two algorithms are free of interpolation and able to be implemented in the real-time processing. In addition, the phase errors of the two algorithms are analyzed particularly. Finally, the results of simulating the point targets and processing the real X-band data are given. The results show that the two algorithms can satisfy the requirements of the real engineering.
王宇，张志敏，邓云凯. SAR 实时方位预处理中的量化误差分析[J]. 现代雷达，2006, 28(2): 36-39.[2]Raney R K, Runge H, Bamler R, Cumming I G, and Wong FH. Precision SAR processing using chirp scaling [J].IEEETrans. on Geosciences Remote Sensing.1994, 32(7):786-799[3]Moreira A, Mittermayer J, and Scheiber R. Extended chirpscaling algorithm for air and spaceborne SAR data processingin stripmap and ScanSAR imaging modes [J].IEEE Trans.on Geosciences Remote Sensing.1996, 34(9):1123-1136[4]Stolt R. Migration by Fourier transform techniques [J].Geophysics.1978, 43(1):49-76[5]Reigber A.[J].et al.. Wavenumber domain SAR focusing withintegrated motion compensation [A]. IGARSS2003, Toulouse,France.2003,:-[6]Ozaktas H M, Kutay M A, and Mendlovic D. Introduction tothe fractional Fourier transform and its applications [J].Advances in Imaging Electronics and Physics.1999, 106(4):239-291[7]Curlander J C, and McDonough R N. Synthetic Apertureradar Systems and Signal Processing [M]. 1991: 171-176.[8]Mittermayer J.[J].Moreira A, and Scheiber R. Reduction ofphase errors arising from the approximations in the chirpscaling algorithm [A]. IGARSS1998, Seattle USA.1998,:-
DownLoad: