A study of interference canceller for DDD system on millimeter-wave band fixed wireless access system

Our efforts are being made to realize a high speed and high frequency utilization efficiency millimeter-wave band backhaul system for the purpose of applying it to the 5th generation (5G) mobile networks. We propose a fixed wireless access (FWA) system of full duplex radio communication (called the Directional Division Duplex (DDD) system) capable of simultaneous bi-directional communication of the same radio frequency channel and same polarization, which has been achieved by a combination of dual waveguide slot array antenna with high spatial isolation using the millimeter-wave band characteristics and interference canceller for suppressing the self-interference signals from transmission to its own reception. This paper describes the overview of the proposed system and explains the characteristics of the dual antenna and the interference canceller required to the realization of DDD system.