【摘要】 在分析聚束合成孔径雷达(SAR)方位向时频关系的基础上,提出了一种新的全孔径分辨率SAR成像算法。根据SAR在条带与聚束模式下回波信号之间的差别,利用现有成熟的条带SAR成像算法实现先对聚束SAR各方位向子孔径成像,而后再将各方位子孔径带宽合成为全孔径带宽,以形成具有全孔径分辨率的SAR图像,极大降低了系统PRF的要求。更多还原

【Abstract】 In this paper,basing on analyzing the time-frequency relationship in azimuth of Spotlight SAR,and according to the difference of the signals of spotlight SAR and strip SAR,a new method which can realize the imaging of spotlight SAR by utilizing the squint mode imaging method of strip SAR is proposed.The azimuth signal of a sub-aperture can be regarded as a sub-band of the full aperture.After imaging the spotlight SAR signal using the imaging method for squint mode strip SAR,the sub-apertures are combined.The having full aperture resolution image is recovered and the azimuth resolution is improved.更多还原