Browsing Electrical & Electronics Engineering by Author "Elamassie, Mohammed"
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Feedback-free adaptive modulation selection algorithm for FSO systems
Elamassie, Mohammed; Uysal, Murat (IEEE, 2021-09)Free space optical (FSO) communication systems experience turbulence-induced fading. As a possible solution to mitigate the effects of fading, adaptive transmission that allows the adjustment of transmission parameters ... -
Finite-SNR diversity gain analysis of FSO systems over gamma-gamma fading channels with pointing errors
Elamassie, Mohammed; Sait, S. M.; Uysal, Murat (IEEE, 2021-06)Free space optical (FSO) communication systems are subject to turbulence-induced fading as a result of fluctuations in the refractive index. Gamma-Gamma (GG) distribution is commonly used in the literature to characterize ... -
FPGA based DCO-OFDM PHY transceiver for VLC systems
Levent, V. E.; Sağlam, Gürol; Uğurdağ, Hasan Fatih; Annafianto, Nur Fajar Rizqi; Aydın, Furkan; Tesfay, Shewit Weldu; Mohamed, Bassam Aly Abdelrahman; Elamassie, Mohammed; Kebapçı, Burak; Uysal, Murat (IEEE, 2019)Satisfying the demand for high bandwidth and low latency in Visible Light Communication (VLC) systems is a difficult challenge. VLC channels exhibit frequency-selectiveness at peak-speeds. This phenomenon generates a serious ... -
Free space optical communication: An enabling backhaul technology for 6G non-terrestrial networks
Elamassie, Mohammed; Uysal, Murat (MDPI, 2023-11)The deployment of non-terrestrial networks (NTNs) is envisioned to achieve global coverage for 6G and beyond. In addition to space nodes, aerial NTN nodes such as high-altitude platform stations (HAPSs) and rotary-wing ... -
FSO-based backhauling for airborne THz base stations
Elamassie, Mohammed; Edemen, Çağatay; Uysal, Murat (IEEE, 2023)Airborne nodes in the form of high-altitude platform stations (HAPSs) or unmanned aerial vehicles (UAVs) can be used for backhauling and wireless access. In this paper, we investigate the cascaded free space optical ... -
Hybrid RF/VLC systems: A comprehensive survey on network topologies, performance analyses, applications, and future directions
Abuella, H.; Elamassie, Mohammed; Uysal, Murat; Xu, Z.; Serpedin, E.; Qaraqe, K. A.; Ekin, S. (IEEE, 2021)Wireless communications refer to data transmissions in unguided propagation media through the use of wireless carriers such as radio frequency (RF) and visible light (VL) waves. The rising demand for high data rates, ... -
IEEE 802.11BB reference channel models for light communications
Miramirkhani, F.; Baykas, T.; Elamassie, Mohammed; Uysal, Murat (IEEE, 2023-12-01)Increasing industrial attention to visible light communications (VLC) technology led the IEEE 802.11 to establish the task group 802.11bb 'Light Communications' (LC) for the development of a VLC standard. As a part of the ... -
Implementation of software-defined adaptive DCO-OFDM for vehicular visible light communication
Tettey, D. K.; Elamassie, Mohammed; Uysal, Murat (IEEE, 2023)With its high data rates and electromagnetic interference-free operation capability, visible light communication (VLC), has emerged as a potential candidate for 6G and beyond networks. In this work, we present the preliminary ... -
Incremental diversity order for characterization of FSO communication systems over lognormal fading channels
Elamassie, Mohammed; Uysal, Murat (IEEE, 2020-04)Free space optical (FSO) communication systems experience atmospheric turbulence-induced fading, which is typically modelled by lognormal distribution. Since the decreasing rate of error probability over lognormal fading ... -
Infrastructure-to-vehicle visible light communications: Channel modelling and performance analysis
Eldeeb, Hossien Badr Hossien; Elamassie, Mohammed; Sait, S. M.; Uysal, Murat (IEEE, 2022-03)Visible light communication (VLC) has emerged as a potential wireless connectivity solution for infrastructure-to-vehicle (I2V) communications. In this paper, we investigate the performance of I2V VLC systems with access ... -
Non-orthogonal multiple access-based underwater VLC systems in the presence of turbulence
Bariah, L.; Elamassie, Mohammed; Muhaidat, S.; Sofotasios, P. C.; Uysal, Murat (IEEE, 2022-02)The promising potential of underwater applications in visible light communication (VLC) systems has recently gained considerable research attention, as an efficient technology for enabling high data rate, massive connectivity, ... -
Operation altitude optimization of solar-powered rotary-wing UAVs for FSO backhauling
Mahmoodi, Khadijeh Ali; Elamassie, Mohammed; Uysal, Murat (IEEE, 2023)Free space optical communication (FSO) has emerged as an alternative backhauling technology. It provides a line-of-sight (LOS) link with a capacity comparable to fiber optics and much higher than those that can be supported ... -
Outage performance analysis of vertical underwater VLC links
Elamassie, Mohammed; Uysal, Murat (IEEE, 2022)In this paper, we investigate the outage performance of vertical stratified underwater optical links in the presence of moderate/strong turbulence conditions. Specifically, we consider the cascaded Gamma-Gamma turbulence ... -
Outage probability analysis of a vertical underwater wireless optical link subject to oceanic turbulence and pointing errors
Ijeh, I. C.; Khalighi, M. A.; Elamassie, Mohammed; Hranilovic, S.; Uysal, Murat (Optica Publishing Group, 2022-06-01)The reliability of an underwater wireless optical communication (UWOC) network is seriously impacted by beam misalignment between transmitters (Txs) and receivers (Rxs). Also, the performance of UWOC systems can be affected ... -
Path selection for relay-assisted underwater visible light communication systems
Elamassie, Mohammed; Uysal, Murat (IEEE, 2022)In this paper, we consider underwater visible light communication (UVLC) system with M parallel relaying paths where each path has N decode-and-forward (DF) relays. One path (not necessarily the best one) out of M paths ... -
Performance analysis and optimization of cascaded I2V and V2V VLC links
Eldeeb, Hossien Badr Hossien; Elamassie, Mohammed; Uysal, Murat (IEEE, 2021-09-06)In smart transportation systems, the infrastructures such as traffic lights are expected to transmit different safety messages according to the receptors (i.e., vehicle, pedestrian, platoon, etc.). The focus of this study ... -
Performance characterization of underwater visible light communication
Elamassie, Mohammed; Miramirkhani, Farshad; Uysal, Murat (IEEE, 2019-01)In this paper, we investigate the performance limits of underwater visible light communication (UVLC) systems. We first develop a closed-form path loss expression as a function of transceiver parameters and water type. We ... -
Performance characterization of vertical underwater VLC links in the presence of turbulence
Elamassie, Mohammed; Uysal, Murat (IEEE, 2018-09-24)In this paper, we investigate the performance of vertical underwater visible light communication (VLC) links. In vertical links, water properties such as temperature and salinity change with the depth. This leads to changes ... -
Performance investigation of streetlight-to-vehicle visible light communication
Eldeeb, Hossıen Badr; Elamassie, Mohammed; Muhaidat, S.; Uysal, Murat; Ho, T. D. (IEEE, 2023)This paper investigates streetlight-to-vehicle visible light communication (VLC) system performance for outdoor broadcasting applications. We adopt streetlight lamps as optical internet-of-thing (IoT) devices broadcasting ... -
Pilot-aided channel estimation for RIS-assisted wireless systems over time-varying fading channels
Azizzadeh, Maryam; Elamassie, Mohammed; Uysal, Murat (IEEE, 2023)Reconfigurable intelligent surfaces (RISs) have emerged as a promising technology for improving wireless communication system performance. RISs can adjust signals' phase and amplitude, resulting in improved signal strength. ...
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