High-Speed Radio-on-Free-Space Optical Mobile Fronthaul System for Ultra-Dense Radio Access Network

We present a transmission of radio signals in high-frequency band over a seamless fiber-FSO system for ultra-dense radio access network. We successfully transmitted 80-Gb/s and 40-Gb/s 2×2 MIMO FBMC-OQAM signal in the 90-GHz band over the DL and UL direction.