Wideband distributed coherent aperture radar

The distributed coherent aperture radar (DCAR) consisting of several cooperating small aperture radars and a control center is proposed to replace the traditional large aperture radar, which is more easily to transport and less expensive to build. In this paper, the constitution and workflow of DCAR are described at first. In the following, the estimation methods of coherent parameters are introduced. And then, a robust full coherent technology based on step frequency signal is proposed to reduce the effect of time synchronization error. At last, the simulations are carried out to verify the proposed methods.