Parametric Investigation Of Different Modulation Techniques On Free Space Optical Systems

TL;DR

This paper analyzes the performance of various modulation techniques in Free Space Optical systems under different parameters, highlighting that NRZ and RZ formats outperform others in terms of system quality.

Contribution

It provides a comparative analysis of modulation formats in FSO systems considering parameters like data rate, range, and attenuation, which is a novel contribution.

Findings

NRZ and RZ modulation formats yield the highest Q-values.

Performance depends on data rate, link range, and attenuation.

Weather conditions assumed to be nearly clear for analysis.

Abstract

Free Space Optics systems (FSO) is one of the evolving wireless technologies. FSO is the only technology with highest data rates in wireless mode of operation but it suffers from bad weather conditions. In this work, analysis is carried out on FSO system having certain parameters constant using different modulation formats (i.e. RZ, NRZ, MDRZ, MODB and CSRZ). Impact of data rate, link range, input power and attenuation factor has been computed. Weather conditions are supposed to be nearly clear and suitable for FSO communication while taking attenuation factor up to 10dB/Km. Q-factor, received signal power and BER is calculated in all scenarios for obtaining an estimate of system performance. Results have shown that NRZ & RZ formats are in the lead until now with highest Q values.