Improved indoor coverage and vehicular connectivity
In order to achieve seamless indoor coverage with data rates up to 10 Gbit per second targeted for 5G, Fraunhofer IIS has developed the concept of a shared UE-side distributed antenna system (SUDAS). SUDAS is an infrastructure of many low-price and easy-to-implement relay nodes scattered in a building or a vehicle that receive signals from base stations and forward them in an mm-wave band. The signals are received by the user equipment (UE) in the building or vehicle.
SUDAS is a type of virtual MIMO (multiple input multiple output) scheme. More specifically, it is a UE-side coordinated multipoint (UE-CoMP) scheme that translates massive spatial multiplexing in a licensed mobile band into massive frequency multiplexing in an unlicensed mm-wave band or vice versa.