The estimation of BFSAR Doppler parameter based on radon transform combined with hough transform

In bistatic synthetic aperture radar (SAR), Doppler parameter estimating algorithm is a pivotal issue. Accuracy of the Doppler parameter affects the image quality directly. Based on the analysis of the relationship between the range migration and Doppler parameter of the bistatic forward-looking SAR (BFSAR), this paper provides a new method to estimate Doppler centroid and Doppler frequency rate of BFSAR by Radon transform combined with Hough transform. This method not only can accurately estimate the Doppler centroid and the Doppler frequency rate, but also reduces the computation time. Simulations validate the effectiveness of this method.