Highly Efficient Imaging Technique for Sparse ISAR Based on Realification AMP Algorithm

To improve operation speed of conventional imaging algorithms, an improved AMP(Approximate Message Passing) algorithm using realification, namely RMoAMP algorithm, was proposed. In RMoAMP algorithm, we multiply a realification matrix by the azimuth sparse transform matrix and using the relationship between Kronecker Product and vectorization of matrix in iterative process to reduce the amount of calculation. the simulations show that compared to the traditional reconstruction algorithms such as OMP, SLO and AMP, the proposed algorithm requires less computation time and good imaging results have been obtained. Proposed algorithm can be used in ISAR fast imaging.