Joint-sparse estimation of migration targets with velocity ambiguity

Range migration is the basic and troublesome problem in moving target detection for wideband radar. In this paper, we propose a joint-sparse estimation algorithm that gives a sparse representation of migration targets with velocity ambiguity. The proposed algorithm utilizes a non-ambiguous representation of the wideband signals to alleviate the velocity ambiguity, then the estimation of the targets scenario is achieved by joint-sparse recovery. Numerical results are presented to demonstrate the effectiveness of the proposed algorithm in case of a multi-target scenario.