【摘要】 估计星载合成孔径雷达 ( SAR)的多普勒调频率 ,建立星载 SAR方位向信号相位的多项式模型 .通过差分处理 ,使调频率的估计变换为频率的估计 ,采用频率估计方法估计多普勒调频率 .通过估计精度和计算量的理论分析 ,指出该方法在保证一定估计精度的情况下 ,可以较大地减少计算量 .最后 ,利用 RADARSAT的数据对算法进行了验证 ,给出了多普勒调频率的参数估计结果 ,并利用该参数进行了成像处理 ,验证了该方法的可行性和有效性 .这种多普勒调频率估计方法可以应用于实时成像、快视成像和粗成像更多还原

【Abstract】 The Estimation of spaceborne SAR Doppler frequency rate is studied. A polynomial model is set up to demonstrate the azimuth signal of the spaceborne SAR and this method converts frequency rate estimation to frequency estimation through difference processing. With the analysis of estimation accuracy and computational complexity, the method is proved to be able to reduce the burden of computation while the estimation accuracy is guaranteed. Finally, the raw data of RADARSAT are used to test the method and the estimation results are given to compute the image of raw data which proves the effectiveness and feasibility of the method. This method can be used on quick look digital image processing of spaceborne SAR.更多还原