레이다 모션에 따른 STAP 위상 보상

Abstract

The conventional space-time adaptive processing (STAP) using a short coherent processing interval (CPI) is generally applied to an environment, where the variations in angle and Doppler information caused by stationary clutter patches during the CPI are negligible. The direct application of the conventional STAP to a relatively long CPI environment causes a performance degradation. This study proposes a method of applying the conventional STAP to the data acquired for a medium CPI scenario. In the proposed method, we compensate for the received signal phase by considering the change in the angle and Doppler information during the CPI, which results in the reduction of the phase variation due to the radar motion. Furthermore, we propose a method of improving the angular resolution by forming a virtual aperture when a high PRF radar with a non-negligible motion that satisfies the DPCA condition. Finally, we demonstrate the proposed method’s performance through a simulation.