Implementation of Digital Moduation Techniques Using Radio over Fiber for Hybrid Passive Optical Networks

Abstract

Hybrid gigabit-passive optical network (GPON) is a hybrid passive optical network, which integrates wavelength division multiplexing (WDM) and time division multiplexing (TDM) into a single passive optical network with reduced cost, high scalability and increased data rate. The objective of this paper is to investigate and analyze the performance of 8-DPSK and 16-QAM data modulation techniques for 5.1 Gbps, 5.5 Gbps, 6.5Gbps and 8.5 Gbps using 25 km single mode fiber. It is described that 16-QAM offers better performance at higher data rates than 8-DPSK modulation technique. The simulated model can support 32 and 64 users. The analysis have been made on the basis of the performance of eye diagram, constellation diagram, optical signal to noise ratio (OSNR) and received optical power.