Abstract:

To overcome the ambiguity of large phase error induced by motion error, a robust algorithm of multiple aperture mapdrift(MAM) incorporating the contrast method is proposed. Specifically, it can promise high-quality focused image even in the case of dominant scatters absence. In the scheme, the modified MAM method takes advantage of non-overlap subapertures by using the contrast method to resolve the phase error ambiguity. In sequence, it is capable of providing precision estimation for high order phase error. In addition, the robust MAM method can reduce the computation complexity to promote the efficiency. Finally, the simulations and the result of real data processing confirm the validation of the proposed algorithm.