Abstract
The existing two-dimension (2-D) autofocus algorithms for bistatic system aperture radar (SAR) do not make full use of the structure of phase error knowledge and estimate phase error in a blind manner. They often suffer from low computational efficiency and imprecise parameter. In this paper, an efficient 2-D autofocus algorithm for bistatic SAR is presented. First, the new bistatic PFA (polar format algorithm) interpretation is used to derive the structure of phase error. Then, based on this knowledge, a 2-D autofocus approach is proposed. This algorithm only requires an estimate of azimuth (1-D) phase error, and then the 2-D phase error can be computed from the 1-D phase error. Compared with other existing autofocus approaches, the experimental results demonstrate that both the accuracy of the parameter estimation and the computational efficiency in this algorithm is obviously improved.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
