Multi-User Mixed FSO-RF Systems With Aperture Selection Under Poisson Field Interference

Abstract

In this paper, we study the performance of mixed free space optical (FSO)-radio frequency (RF) multiuser relay network with aperture selection and opportunistic user scheduling in the presence of Poisson field interference. The considered system includes multiple optical sources (apertures), one amplify-andforward (AF) relay, and multiple users. The source is connected with the relay node through FSO links and the relay is connected with the users through RF links with a Poisson field interference at the users. The FSO-RF channels are assumed to follow Málaga-M/shadowed κ-µ fading models with pointing errors on the FSO links. Exact closed-form expressions are derived for the outage probability and average symbol error probability (SEP). Moreover, the system performance is studied at the high signal-to-noise ratio (SNR) regime, where an approximate expression for the system outage probability is derived, in addition to deriving the system diversity order and coding gain. Then, the optimum source and relay transmission powers and relay position are determined to minimize the system asymptotic outage probability. The Monte-Carlo simulations are provided to validate the achieved exact and asymptotic results.

Performance evaluation of dual backhaul links RF/FSO for small cells of 5G cellular system

“…These links applied to small cells at 5G cellular networks, FSO link superiority on the RF link in this work. Several research [14], [15] proposed a switching scheme for hybrid FSO and millimeter wave RF communications. The system is analyzed based on the outage probability and bit error rate (BER) [16].…”

“…A closedform for the outage probability and average of BER was derived in [17] and [18]. The performance of mixed FSO/RF multi-user relay system with aperture selection was studied in [15] based on opportunistic user scheduling in the presence of Poisson field interference. The main contributions of this work are increasing the number of user at the cell edge region by using the mixed RF/FSO link between the deployed RSs at the boundaries of cell.…”

Performance analysis of reconfigurable intelligent surface in a dual-hop DF relay empowered asymmetric RF/FSO networks

“…The beam width 𝑤 𝑧 can be defined as 𝑤 𝑧 = 𝜙𝐷 𝑇 with 𝜙 denotes as the divergent angle of the beam width and 𝐷 𝑇 = 𝐷 1 + 𝐷 2 with 𝐷 1 and 𝐷 2 respectively represent the distance between relay and the RIS, and between the RIS and destination. The 𝜎 𝜃 2 and 𝜎 𝛽 2 signify the variance of pointing error angle and deflection error angle for ICRN respectively. Thus, the mean and variance of the PDF given in (8) can be expressed as:…”

“…Actually, the RF-based wireless system provides wide operational range but suffers from few challenges such as scarcity of spectrum, interference, lower capacity and so on [1]. As a result of this, free space optical (FSO) has been considered as a promising solution owing to its advantages that includes unlicensed spectrum, higher data rate, low cost and easy of deployment, immunity to inference etc [2]. However, the performance of FSO system is highly degraded by atmospheric turbulence induce-fading causing fluctuation in the refractive index due to inhomogeneities in temperature and pressure of the environment [3].…”

Performance of Hybrid THz and Multi-Antenna RF System with Diversity Combining

“…The authors in [25] developed asymptotic analysis for the mixed FSO/RF system with the best user selection from multiple users on RF channels with Nakagami-m fading in the presence of co-channel signal interference. The authors in [24] studied the performance of a mixed FSO and RF multi-user network with aperture selection and opportunistic user scheduling over shadowed κ-µ RF channels in the presence of Poisson field interference. A multiple relay setup was considered in [26], where the best relay was selected to forward the data from a source over Nakagami-m RF channel to a multi-aperture FSO detector.…”