OSR-reduced Quad-level Delta-sigma Modulation based RoF Link for 2-Gbit/s 32-QAM OFDM

An OSR-reduced quad-level delta-sigma modulated 32-QAM OFDM based RoF link was experimentally demonstrated. The 2-Gbit/s data was transmitted over 25-km SMF with OSR reduced to 15 at receiving power of −9 dBm.