On the Performance Analysis of Higher Order QAM Schemes over Mixed RF/FSO Systems
Type
ArticleKAUST Department
Communication Theory LabComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
Date
2020-04-27Online Publication Date
2020-04-27Print Publication Date
2020-07Permanent link to this record
http://hdl.handle.net/10754/662685
Metadata
Show full item recordAbstract
In this work, the performance of a dual-hop variable gain amplify-and-forward (AF) mixed radio frequency (RF)/free space optics (FSO) system is analyzed in details. As variable gain AF relay network is considered, processing delay results in outdated channel state information (CSI) during amplification at the relay. For general applicability, the RF link is modeled with the generalized Nakagami-m fading. The FSO link is modeled with the Gamma-Gamma distribution which is affected with the atmospheric turbulence and pointing error impairments, and both the intensity modulation with direct detection (IM/DD) and heterodyne detection are employed at the FSO receiver. In this context, analytical expressions of outage probability and ergodic capacity are derived in terms of Meijer-G function and extended generalized bivariate Meijer-G function. For diversity order, asymptotic outage probability expression is also derived. Further, cumulative distribution function based generalized average symbol error rate expressions for various quadrature amplitude modulation (QAM) schemes such as hexagonal QAM, rectangular QAM, and cross QAM are derived in terms of Meijer-G function. Furthermore, a detailed comparative study of various modulation schemes is presented and the impact of pointing error, atmospheric turbulence, outdated CSI, and Nakagami-m parameter are highlighted on the system performance. Finally, all the analytical results are verified through Monte-Carlo simulations.Citation
Singya, P. K., Kumar, N., Bhatia, V., & Alouini, M.-S. (2020). On the Performance Analysis of Higher Order QAM Schemes over Mixed RF/FSO Systems. IEEE Transactions on Vehicular Technology, 1–1. doi:10.1109/tvt.2020.2990747Additional Links
https://ieeexplore.ieee.org/document/9079579/https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9079579
ae974a485f413a2113503eed53cd6c53
10.1109/TVT.2020.2990747