Performance Analysis of Modulation Techniques for Indoor Free Space Optics

Faisal Ahmed Dahri; Fahim Aziz Umrani; Kehkashan Memon; Farida Memon; Abdul Waheed Umrani

doi:10.55447/jaet.08.01.151

Authors

Faisal Ahmed Dahri Center for Sensor Systems (ZESS), University of Siegen, Germany
Fahim Aziz Umrani Department of Telecommunications, Mehran University of Engineering & Technology, Jamshoro Pakistan
Kehkashan Memon Department of Telecommunications, Mehran University of Engineering & Technology, Jamshoro Pakistan
Farida Memon Department of Electronics, Mehran University of Engineering & Technology, Jamshoro Pakistan
Abdul Waheed Umrani Department of Telecommunications, Mehran University of Engineering & Technology, Jamshoro Pakistan

DOI:

https://doi.org/10.55447/jaet.08.01.151

Keywords:

Indoor Free Space Optics (IFSO), Q-factor, BER, Modulation Schemes, Optisystem

Abstract

This paper deals with designing and analyzing the performance of indoor Free Space Optics (FSO) link for various modulation techniques in diffused channel conditions. At the present time, FSO is widely adopted because of its features; high speed, security, low power consumption and unlicensed spectrum. LEDs and LASERs are optimum choice to cater the dynamic range of requirements for optical communication system. The indoor FSO system has been simulated in Optisystem 14 software using various modulation schemes under different attenuation factors which may influence the performance of the system. In this paper, we have analyzed the performance of different modulation schemes such as Return to Zero, Non-Return to Zero, Phase Shift Keying, Pulse Amplitude Modulation, Quadrature Amplitude Modulation and Minimum Shift Keying. This work mainly focuses on the parameters; Bit Error Rate, Q-factor and power corresponding to transmission distance achieve minimum attenuation.