Beamforming for LEO satellite communication based on FDA

Due to the time-varying phase in frequency diverse arrays (FDAs), traditional phase-based secure communication (SC) methods cannot be utilized. In this reported work, automatic scanning property of FDAs (time-varying property) was rederived. This allows for presetting beam time towards desired receiver (Bob). Subsequently, time-carrying design applied Low Earth Orbit (LEO) satellites. A satellite-to-ground method is proposed based on intervals, which effectively prevents interception information by an undesired (Eve). Simulation results are presented validate effectiveness method.