基于SPGA算法的低频超宽带SAR运动补偿方法

对已经初步聚焦的低频超宽带(ultra wideband, UWB)合成孔径雷达(synthetic aperture radar, SAR)图像进行基于图像域的相位误差补偿，可进一步提高图像聚焦质量。依据UWB SAR运动误差模型，提出了基于条带式相位梯度自聚焦（strip phase gradient autofocus, SPGA）算法的相位误差补偿方法。该方法有效地补偿大合成孔径、宽测绘带低频UWB SAR图像中的二维空变相位误差。仿真和实测数据处理结果验证了所提方法的有效性。

Motion compensation method for low frequency ultra-wideband SAR based on SPGA algorithm

For the elementary focused UWB SAR image,the phase error compensation based on image domain will further improve its quality.According to the UWB SAR motion error model,a residual phase error compensation method for UWB SAR image based on strip phase gradient autofocus(SPGA) algorithm is proposed.And this method can effectively correct the space variant phase error in low frequency UWB SAR image,which is induced by the long synthetic aperture and large swath.The feasibility of the new method is verified by ...