Implementation of Dynamic Directional Modulation with Software Defined Radio

Dynamic Directional Modulation (DDM) is a technique for phased arrays that can increase security in the physical layer. In this work, we present a setup for a DDM system where the array feeding network is fully implemented with Software Defined Radio (SDR). The calibration of the system is discussed, and some experiments are carried out to demonstrate the tradeoff between security and transmitted power.