Effect of Signal Direct Detection on Sub-Carrier Multiplexed Radio over Fiber System

Abstract: Sub-carrier multiplexing is an emerging technology for Radio over Fiber systems. . It provides high capacity transmissions at lower costs and enables fiber based wireless access. It uses optical components for high performance but limitations of electronic components cause electronic bottleneck which limits the overall system performance. In this paper an attempt has been made to reduce the number of electronic components for the detection of baseband signals. Here baseband signals are directly detected from optical signals without any need of electrical demodulation module. This method overcomes limitations of electronic components and reduces system cost simultaneously. Performance of the system is reported for variation in fiber length and bit rate in form of Max. Q Factor and Min. BER and values of these parameters are plotted on graphs. All the simulations are done on Optisystem v 7.0.

Keywords: Baseband signal, Direct detection, Reduced electronic components, Radio over Fiber, Sub- Carrier Multiplexing, Optisystem.