Radial velocity estimation for the extended moving target with distributed space-borne SAR

This paper describes a new radial velocity estimation method for the extended moving target of low signal-to-clutter ratio with the distributed space-borne SAR system.By velocity searching for one fitting best to the under-test signal,a fine estimation of target radial velocity can be achieved.The estimation performance would not be sacrificed in order to suppress clutter and/or interference and the high resolution radial velocity estimation can be achieved.A preliminary result against space-borne simulation data demonstrates the effectiveness of the proposed method.