星地双基合成孔径雷达聚束模式快速BP算法

A Fast Backprojection Algorithm for Spotlight Mode Bi-SAR Imaging

该文提出了一种应用于双基合成孔径雷达聚束模式的快速反向投影(FBP)算法,该算法在距离向压缩上使用地面接收器的同步信道作为回波信号的距离向匹配滤波器,在方位向压缩上采用2次相位校正降低快速BP算法中的近似误差对成像造成的影响,算法的计算复杂度为O(N^(2.5))。最后利用仿真数据和实测数据在图形处理器(GPU)上对该算法进行了验证。

A Fast BackProjection （FBP） algorithm for spotlight mode Bistatic Synthetic Aperture Radar （Bi-SAR） was presented. The syne channel signal from a land receiver was taken as the matched filter for the echo signal in the phase of range compression. The secondary phase calibration was shown to decrease the approximation error effects of FBPA in the phase of azimuth compression. Computational complexity of this algorithm was O（N2.5） . In addition, this algorithm was validated on a Graphic Processing Unit （GPU） using measured and simulation data.