Simplified 27.15 Gbits/s spread-OFDM PON using DFT/IDFT-free receiver with 1/16 sub-Nyquist sampling rate

This paper presents 27.15-Gbits/s spread-OFMD PON sub-Nyquist receiver via 1-GSample/s ADC for each 32-ONU to demodulate signals, which greatly reduces complexity. Moreover, DC algorithm is proposed to eliminate DC-located distortion caused by sub-Nyquist ADC.