基于等效单站的双基地SAR波数域成像算法

为了使传统波数域成像算法能够很好地适用于双基地合成孔径雷达(synthetic aperture radar,SAR),首先建立了双基地SAR的等效单站模型。然后又进一步建立了基于该等效单站SAR的波数域二维频谱模型。通过分析发现,传统的波数域成像算法会造成波数域回波信息的损失,从而达不到理想的聚焦效果,所以为了充分利用全部波数域回波信息以提高聚焦能力,提出了一种全新的波数域成像数学模型。最后实验结果验证了新算法的有效性。

Omega K imaging algorithm for bistatic SAR based on equivalent monostatic model

An equivalent monostatic model is first established for the traditional Omega K imaging algorithm being to be applied to the bistatic synthetic aperture radar (SAR). Then, based on the equivalent monostatic SAR, a two dimensional spectrum model is further established. In fact, the traditional Omega K imaging algorithm can cause the loss of echo information, so the optimal focusing effect can not be approached. Therefore, a kind of new Omega K imaging mathematical model is proposed in order to make full use of all echo information and effectively improve the focusing performance. Finally, the experimental results show that the above mentioned methods are valid and feasible.