High resolution range profile reconstruction based on local reoptimization FOCUSS algorithm

The Focal Underdetermined System Solver (FOCUSS) method is widely applied in the compressive sensing (CS) based high resolution range profile (HRRP) reconstruction. However, the parameter estimation of the scattering center type is not accurate enough. In this paper, an algorithm named by local reoptimization FOCUSS is presented to deal with such a case. After the traditional FOCUSS algorithm being applied, the estimated parameters of each extracted scattering center in a given range cell are modified by minimizing the construction residual upon each atom with different type of parameter. Finally, the numerical simulations show that the proposed method can effectively estimate the parameters of attributed scattering centers while the traditional FOCUSS algorithm fails, especially for the estimation of type parameter.