Hybrid Phase Shift Keying-Multipulse Pulse-Position Modulated O-OFDM Signals for NG-PONs

摘要

In this paper, Hybrid PSK-MPPM is proposed to improve the system performance of the conventional ACO-OFDM by modulating the subcarriers with less number of high power PSK modulated symbols while their positions will also be utilized to carry additional information. At the receiver, the position of the modulated subcarriers will be firstly identified on each sub-frame by selecting the subcarriers with the highest received power and the PSK symbols will be subsequently decoded. The performance of the proposed detection scheme is close to that of ML detection scheme with significant reduction in the computational complexity. Throughout simulations, we demonstrate enhancement in the receiver sensitivity and the PON reach compared to the conventional PSK modulation for the same spectral efficiency.