Performance analysis of dual-hop optical wireless communication systems over k-distribution turbulence channel with pointing error

TL;DR

This paper analyzes the performance of dual-hop free space optical communication systems affected by atmospheric turbulence and pointing errors, deriving exact formulas for outage probability and bit error rate.

Contribution

It provides a novel exact closed-form analysis of FSO system performance considering k-distribution turbulence and pointing errors, with comparisons across modulation schemes.

Findings

Derived closed-form expressions for outage probability and BER.

Quantified the impact of turbulence and pointing errors on system performance.

Compared different modulation schemes under turbulence conditions.

Abstract

In this paper, we investigate the performance of the dual-hop free space optical (FSO) communication systems under the effect of strong atmospheric turbulence together with misalignment effects (pointing error). We consider a relay assisted link using decode and forward (DF) relaying protocol between source and destination with the assumption that Channel State Information is available at both transmitting and receiving terminals. The atmospheric turbulence channels are modeled by k-distribution with pointing error impairment. The exact closed form expression is derived for outage probability and bit error rate and illustrated through numerical plots. Further BER results are compared for the different modulation schemes.