与常规SAR相比,双站合成孔径雷达(Bi-SAR)收发距离和的变化规律更为复杂,且距离徙动量更大,用单站算法的一般改进形式难以达到理想的成像效果。文中讨论了在波数域上Bi-SAR成像的解决方案,提出利用双站数据波数域补偿和波数域坐标旋转实现星载双站SAR成像,并通过大场景点阵目标仿真结果验证了理论分析的正确性。

Compared with general SAR,bistatic synthetic aperture radar(Bi-SAR) has the complexity of its range history and its range migration,thus it is difficult to get perfect imaging effect with some commonly modified versions of algorithms.Here some wave number domain solution for Bi-SAR image formation is discussed and some approaches that utilize data compensation and coordinate rotation on wave number domain to implement space-borne Bi-SAR imaging are proposed.The simulation result of point array's imaging on wide scene has verified the correctness of the theoretical analysis.

TN958