PDA-RoF: Polar Coordinates Assisted Hybrid Digital-Analog Radio-over-Fiber Modulation and Demodulation Architecture

We propose and demonstrate a polar coordinates-assisted digital-analog radio-over-fiber technique based on cascaded analog pulse code modulation and digital modulation with hybrid constellation shaping, achieving >12.27dB SNR gain over A-RoF, 1.29% EVM and 2.1Tb/s CPRI-equivalent rate.