Enhanced 4×4 MIMO RoF architecture for 5G mmWave indoor applications at 60 GHz unlicensed band

4×4 Multiple Input Output (MIMO) optical architecture based on Radio over Fiber (RoF) is proposed for 5G millimeter Wave (mmWave) indoor applications in the unlicensed 60 GHz band. First-order and second-order sidebands, generated by Dual-Drive Mach-Zehnder Modulator (DD-MZM), are exploited as subcarriers order to reduce number of Local Oscillators (LOs) implemented. Four MIMO-OFDM signals multiplexed using Dual-Parallel (DP-MZM) configured perform Optical Carrier Suppression (OCS) modulation. spacing ensured between each data signal its corresponding subcarrier which allows simple heterodyne detection at Access Point (RAP) level. In addition, we have a MIMO extension Triple-S-and-Valenzuela (TSV) radio channel model geometrical approach. We demonstrate that RoF system with adequate configuration can meet New (NR) requirement terms Error Vector Magnitude (EVM). Moreover, Bit Rate (BER) performance evaluated without NR coding, transmission 25 km fiber followed 3 m channel, exploiting overall allocated band achieve very high rate up 122.5 Gb/s.