SAR moving objects trajectory estimation: solving the blind angle ambiguity with a single sensor
It has previously been shown that the so-called blind angle ambiguity preventing moving target direction determination from synthetic aperture data can be solved using a single antenna. This paper addresses the design of the antenna radiation pattern leading to the best velocity estimates. Aiming at this goal, the Fisher information matrix for the unknown moving targets' velocity parameters is computed as a function of the antenna radiation pattern. The optimal antenna radiation pattern is then inferred. Simulation results comparing the optimal solution with common antenna radiation patterns shows the advantage of the former.