Performance Analysis of Two Way All Optical Relay Assisted PM-FSO over Different Weather Conditions

Abstract

This paper proposes a novel method of relaying in Polarization Multiplexing (PM) in Free Space Optical (FSO) networks using amplify and forward and decode and forward relays with and without fixed gain. The idea of multiplexing scheme combined with relay helps in improving the channel capacity and the link distance. To mitigate the inter channel crosstalk that occurs in Wavelength Division Multiplexing, PM is proposed. To avoid the degrading performance of the system due to atmospheric turbulence, QAM modulation scheme is used. The performance of the system is analyzed by considering various parameters like BER, link distance and the transmitted and received power. Monte Carlo simulations are used to validate the results.

Keywords

• free space Optical communication (FSO)
• bit error rate(BER)
• serial and parallel relays
• amplify and forward (AF)
• decode and forward (DF)
• gamma gamma channel