Aggregate Hardware Impairments Over Mixed RF/FSO Relaying Systems With Outdated CSI
Elyes Balti, Mohsen Guizani, Bechir Hamdaoui, Bassem Khalfi

TL;DR
This paper analyzes a dual-hop RF/FSO relaying system considering hardware impairments, outdated CSI, and atmospheric effects, providing analytical performance metrics and insights into high SNR behavior.
Contribution
It introduces a comprehensive hardware impairment model and derives analytical expressions for system performance under realistic conditions with outdated CSI.
Findings
Hardware impairments have minimal impact at low SNR.
Impairments significantly degrade performance at high SNR.
Analytical expressions match simulation results.
Abstract
In this paper, we propose a dual-hop RF (Radio-Frequency)/FSO (Free-Space Optical) system with multiple relays employing the Decode-and-Forward (DF) and Amplify-and-Forward (AF) with a Fixed Gain (FG) relaying scheme. The RF channels are subject to a Rayleigh distribution while the optical links experience a unified fading model emcopassing the atmospheric turbulence that follows the M\'alaga distribution (or also called the -distribution), the atmospheric path loss and the pointing error. Partial relay selection (PRS) with outdated channel state information (CSI) is proposed to select the candidate relay to forward the signal to the destination. At the reception, the detection of the signal can be achieved following either heterodyne or Intensity Modulation and Direct Detection (IM/DD). Many previous attempts neglected the impact of the hardware impairments and assumed…
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Taxonomy
TopicsOptical Wireless Communication Technologies · Advanced Wireless Communication Technologies · Satellite Communication Systems
