Fast back-projection algorithm for Bistatic SAR with parallel trajectory

Inhalt:
Exploiting the fundamental redundancy between nearby aperture positions for high frequency reflectivity components in the along-track direction, we will propose a factorized back-projection algorithm for bistatic SAR with parallel trajectory inversion based on recursive partitioning of the back-projection integral. The basic back-projection summation is factorised into n processing stages, each with successively increasing sub-aperture and decreasing sub-image size, the algorithm stops when the full aperture or resolution is reached. The operation numbers reach O(N2log2N), which approaches that of the method based-on FFT.