A novel ROF link scheme with frequency quadrupling optical millimeter-wave carrying dual-stream of 10Â Gbit/s 16-QAM signals

► We proposed a novel ROF system multiplexing two 10Gbit/s 16QAM electronic RF signals. ► The system has higher spectrum efficiency and great tolerance to fiber dispersion. ► The results show good transmission performance even after 39 km fiber transmission.