Study on motion compensation of helicopter-borne snapshot imaging radar based on antenna array

The Snapshot imaging radar based on antenna array can achieve high-resolution imaging both in spatial domain and time domain. In this paper, the snapshot imaging radar located on helicopter platform is studied. The paper mainly focused on the influence on the echo caused by the vibration characteristics and non-ideal trajectory of helicopter platform. Firstly, adopting frequency modulated continuous wave signal, the paper analyzes the echo model with motion errors. Then, the error is decomposed into linear and quadratic terms, and the frequency scaling algorithm with motion error compensation is deduced. Finally, the model and methods described in the paper are verified via a snapshot imaging experiment based on antenna array.