Date of Award




Document Type


Degree Name

Doctor of Philosophy (PhD)


Department of Electrical and Computer Engineering

Content Description

1 online resource (xv, 130 pages) : illustrations (chiefly color)

Dissertation/Thesis Chair

Hany Elgala

Committee Members

Gary Saulnier, Dola Saha, Georges Kaddoum


Hybrid Networks, LiFi, OFDM, Physical Layer Security, Visible Light Communication, Wireless Communication, Mobile communication systems, Wireless communication systems, Optical communications, Internet of things

Subject Categories

Computer Engineering | Electrical and Electronics


Recently, research on sixth-generation (6G) wireless networks has gained significant interest. By 2030, it is expected that 6G will introduce revolutionary applications and services. Thus, 6G is likely to expand across all available spectrum, including terahertz (THz) and optical frequency bands. Although 5G will offer a massive upgrade to the spectrum, the technology does not provide solutions to support a vast multitude of services and devices simultaneously.Motivated by the heterogeneity of wireless technologies, devices, and services, the Mixed Carrier Communication (MCC) concept is introduced for the first time. MCC is a novel concept that supports the 6G vision by enabling simultaneous broadband access, low-rate Internet-of-Things (IoT) connectivity, device-free sensing, and device-based localization. Additionally, visible light communication (VLC) acts as a core technology for the introduced design motivated by 1. the unlimited and unregulated spectrum, 2. the green nature of the technology introducing substantial power savings to provide communication on top of illumination, 3. the availability of the indoor lighting infrastructure, and 4. the fact that indoor communications represent more than 80% of the communications capacity. MCC enables a unified transmission physical layer (PHY) design to simultaneously connect devices with different complexities. Thus, the proposed approach addresses the huge spectrum needs by futuristic applications, as well as the multitude of services enabled by varying device capabilities. Additionally, MCC addresses the VLC system requirements of illumination constraints and dimming control that is an essential feature for lighting systems. Modeling, simulation, and experimental results highlight the possibility of capturing high-speed, low-speed, and localization information from the same transmitted MCC waveform based on the receiver design.