Performance analysis and improvement of phase gradient autofocus algorithm; 相位梯度自聚焦算法的性能分析及改进 2. And then,the strip phase gradient autofocus(PGA) algorithm is ameliorated. 首先建立了适合机载UWB SAR成像几何的相位误差模型,并分析了其特点;然后针对模型特点,对条带式相位梯度自聚焦算法作...
Beaver. Two-dimensional phase gradi- ent autofocus. 4123:162-173, 2000.Warner D W,Ghiglia D C,Htzgerrel A,et al.Two-dimensional phase gradient autofocus.Proceedings of SPIE the International Society for Optical Engineering. 2000Warner D W,Ghiglia D C,Fitzgerrel A,et al. Two-dimensionalphase...
Finally, we obtained both the aberration-corrected volume and the aberration wavefront estimated from the integral of the phase gradient map S(u). The estimated aberration wavefront can also be used during the PSF generation process to obtain a more accurate description of the imaging model, ...
For real-time autofocus of defocused images produced by Synthetic Aperture Radar(SAR), the twodimensional autofocus approach proposed in this study is used to correct the residual range cell migration and compensate for the phase error. Next, a block-wise Phase Gradient Autofocus(PGA) is used to...
gradient adaptive algorithm was adopted to reconstruct the echoes in range dimension.Then the method of minimizing the entropy of the average range profile was applied to estimate the parameters which are used to compensate translation components of the received echoes.Besides,the phase adjustment and ...
Azimuth migration-corrected phase gradient autofocus for bistatic SAR polar format imaging. IEEE Geosci. Remote Sens. Lett. 2020, 18, 697–701. [Google Scholar] [CrossRef] Mao, X.; Zhu, D.; Zhu, Z. Polar format algorithm wavefront curvature compensation under arbitrary radar flight path. ...
Phase gradient autofocus—A robust tool for high resolution SAR phase correction. IEEE Trans. Aerosp. Electron. Syst. 1994, 30, 827–835. [Google Scholar] [CrossRef] Chen, J.; Chen, J.; Wang, S. Bistatic Radar DPCA Technique. In Proceedings of the 2006 CIE International Conference on ...
Ji et al. [25] introduced an application of the phase gradient autofocus to compensate for spatially varying and anisotropic scintillation phase errors. Lin et al. [26] proposed a method integrated into the focusing process to estimate and mitigate ionospheric effects in bistatic SAR System, ...
Aiming at the problem that the RCM and ANP of UAV Bi-SAR in spotlight mode are difficult to correct and equalize due to the severe two-dimensional (2D) spatial variation, an RCM correction (RCMC) and ANP equalization (ANPE) method based on Doppler domain blocking is proposed. First, the ...
WUFI 2D was used to perform one-dimensional hygrothermal transfer simulations. The version used was the 4.5 developed by the Department of Hygrothermics at Fraunhofer IBP (Stuttgart, Germany). Both walls were designed within the software, leveraging its material database to attribute specific propert...