Prototype system evaluation and field trial of 40 GHz-band directional division duplex (DDD) radio system

For the purpose of the realization of radio communication with high speed and high frequency utilization efficiency, we propose a 40 GHz-band full duplex radio system (called the Directional Division Duplex (DDD) system). The system realizes transmission and reception at the same time by using the same radio frequency and same polarization. We have developed the DDD radio system and performed field trial with the prototype equipments. This paper describes the overview of the prototype system and explains the characteristics of DDD system and the result of field trial.