Hybrid Digital-Analog Radio-over-Fiber (DA-RoF) Modulation and Demodulation Achieving a SNR Gain over Analog RoF of >10 dB at Halved Spectral Efficiency

摘要

We propose and experimentally demonstrate a hybrid digital-analog radio-over-fiber technique based on cascaded digital PCS-121-QAM modulation and analog pulse code modulation for each radio waveform sample, achieving 12.8 dB SNR gain over A-RoF and 1.38% EVM.