SAR moving targets imaging based on ambiguity function and Radon transform

A new usage of the ambiguity function is given in this paper to resolve the moving targets imaging of SAR. It is well known that the SAR echo can be considered as a linear FM signal, so does the echo of moving targets. The square modulus of the linear FM signal has high energy centrality in the ambiguity domain. Its peaks represent straight lines whose slopes are equal to the Doppler rates of the moving targets´ echo signals. The parameters of the moving targets can be estimated by applying the Radon transform to the ambiguity function. In this way, we can easily detect and image the moving targets. The simulation results prove the effectiveness and feasibility of this new method