Ruan Hang, Wu Yan-Hong, Ye Wei. Inverse Synthetic Aperture Ladar Imaging Algorithm for Maneuvering Target Based on FRFT-CLEAN[J]. Journal of Electronics & Information Technology, 2013, 35(7): 1540-1546. doi: 10.3724/SP.J.1146.2012.01423
Citation:
Ruan Hang, Wu Yan-Hong, Ye Wei. Inverse Synthetic Aperture Ladar Imaging Algorithm for Maneuvering Target Based on FRFT-CLEAN[J]. Journal of Electronics & Information Technology, 2013, 35(7): 1540-1546. doi: 10.3724/SP.J.1146.2012.01423
Ruan Hang, Wu Yan-Hong, Ye Wei. Inverse Synthetic Aperture Ladar Imaging Algorithm for Maneuvering Target Based on FRFT-CLEAN[J]. Journal of Electronics & Information Technology, 2013, 35(7): 1540-1546. doi: 10.3724/SP.J.1146.2012.01423
Citation:
Ruan Hang, Wu Yan-Hong, Ye Wei. Inverse Synthetic Aperture Ladar Imaging Algorithm for Maneuvering Target Based on FRFT-CLEAN[J]. Journal of Electronics & Information Technology, 2013, 35(7): 1540-1546. doi: 10.3724/SP.J.1146.2012.01423
When imaging maneuvering target with Inverse Synthetic Aperture Ladar (ISAL), dispersion and Doppler frequency time-variation exist in the echo signal in range and cross-range direction, respectively. For targets of which the maneuverability can be approximated as a second-order motion, the characteristics of the ISAL echo signal are analyzed, and an imaging algorithm based on FRactional Fourier Tronsform(FRFT-CLEAN) is proposed. FRFT is used for range dispersion elimination. After motion compensation, a method combining FRFT and CLEAN technique (FRFT-CLEAN) is proposed for azimuth imaging. Simulation results demonstrate the validity of this algorithm.