Revolutionizing Optical Wireless Communications via Smart Optics

Abdelhady, Amr M.; Amin, Osama; Alouini, Mohamed‐Slim; Shihada, Basem

doi:10.1109/ojcoms.2022.3164790

Cited by 15 publications

(5 citation statements)

References 110 publications

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“…For almost everything nowadays, people need a method for secure, highbandwidth, low-congestion communication with low data transmission latency and highspeed, for voice/video conference calls, SMS, MMS, music/video transmissions, HDTV program watching, office work, banking, gaming services, etc. [227][228][229]. Smart phones, tablets, wearables, smart televisions, smart hybrid vehicles, wireless gaming devices, and electrical appliances with sensors require an internet connection in today's smart home.…”

Section: Light-fidelity (Li-fi)mentioning

confidence: 99%

“…Li-Fi is a new full-duplex WOC technology that enables us to connect to the Internet by using LEDs. Li-Fi communication can be established for point-to-multipoint, multipoint-to-point, and to/from multiusers [227,228]. Several studies were conducted in the 1970s demonstrating the potential of infrared-based OwC technology in an indoor environment in terms of bandwidth, data transfer rate, communication link range, etc.…”

Section: Light-fidelity (Li-fi)mentioning

confidence: 99%

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A Review–Unguided Optical Communications: Developments, Technology Evolution, and Challenges

et al. 2023

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This review paper discusses the complete evolution of free-space optical (FSO) communication, also known as unguided optical communication (UOC) technologies, all the way back to ancient man’s fire to today’s machine-learning-supported UOC systems. The principles, significance, and developments that have happened over the past several decades, as well as installation methodologies, technological limitations, and today’s challenges of UOCs are presented. All the subsets of UOC: FSO communication, underwater optical wireless communication (UOWC), and visible light communication (VLC), with their technology/system developments, potential applications, and limitations are reviewed. The state-of-the-art developments/achievements in (i) FSO channel effects and their mitigation techniques; (ii) radio-over-FSO techniques; (iii) wavelength division multiplexing and sub-carrier multiplexing techniques; (iv) FSO for worldwide interoperability for microwave access applications; (v) space optical satellite communication (SOSC); (vi) UWOC; (vii) photoacoustic communication (PAC); (viii) light-fidelity; (ix) VLC; (x) vehicular VLC (V2LC); and (xi) optical camera communication are reviewed. In addition, the current developments on emerging technologies such as artificial intelligence (to improve the performance of UOC systems), energy harvesting (for the effective utilization of UOC channels), and near-future communication network scenarios (mandatory for secured broadband digital links) are covered. Finally, in brief, to achieve the full potential of UOC systems, challenges that require immediate research attention are summarized.

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Section: Light-fidelity (Li-fi)mentioning

confidence: 99%

Section: Light-fidelity (Li-fi)mentioning

confidence: 99%

A Review–Unguided Optical Communications: Developments, Technology Evolution, and Challenges

et al. 2023

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“…Then, once the polarized light reaches the receiver side and passes through the third polarizers with polarization angles θ 31 = 0°and θ 32 = −45°, the intensity of the polarized signal at the k th = 1, 2 receiver can be determined using (1), which reduces to, for 0 ≤ t ≤ T sym ,…”

Section: Sunlight Modulator Designmentioning

confidence: 99%

“…Wireless communication technologies are typically based on either radio frequency (RF) communication, which mainly suffers from a congested frequency band, or optical communication, which requires energy expensive active light sources, such as lasers and light-emitting diodes (LEDs) [1]. Whereas, considerable amounts of ambient light remain unexploited and are mainly used for illumination purposes.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of LCD-Based Modulator for Passive Sunlight Communications

et al. 2022

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Solar energy is widely used for electricity generation, heating systems, and indoor environment daytime illumination. Indeed, large amounts of sunlight energy remain insufficiently used. In this work, we aim at employing sunlight energy for data transmission as a green option for wireless communications. Being emitted by an uncontrollable source, taming the sunlight is a challenging task that requires appropriate technologies to manipulate incident light. Liquid crystal devices are switchable glass technologies that have adequate response time and contrast characteristics for such an application. In this regard, we design a novel dual-cell liquid crystal shutter (DLS) by stacking two liquid crystal cells that operate in opposite manners, and we build our sunlight modulator with an array of DLSs. Then, we adopt time division multiplexing and polarization-based modulation to boost the data rate and eliminate the flickering effect. In addition, we provide mathematical modeling of the system and study its performance in terms of communication and energy consumption. Finally, we introduce some numerical results to examine the impact of multiple parameters on the system's performance and compare it with the state-of-the-art, which showed that our system features higher data rates and extended link ranges.

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“…The emergent Internet of Things (IoT) has boosted the need for innovative communication solutions that provide reliable and efficient data transmission methods. An intelligent, efficient, and reliable system can be obtained by combining VLC and RF technologies [23]. This integrated system can support various IoT applications, such as smart lighting, home automation, e-healthcare, and industrial IoT.…”

Section: Introductionmentioning

confidence: 99%

A Review of Hybrid VLC/RF Networks: Features, Applications, and Future Directions

Bravo Alvarez,

Montejo-Sánchez,

Rodríguez-López

et al. 2023

Sensors

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The expectation for communication systems beyond 5G/6G is to provide high reliability, high throughput, low latency, and high energy efficiency services. The integration between systems based on radio frequency (RF) and visible light communication (VLC) promises the design of hybrid systems capable of addressing and largely satisfying these requirements. Hybrid network design enables complementary cooperation without interference between the two technologies, thereby increasing the overall system data rate, improving load balancing, and reducing non-coverage areas. VLC/RF hybrid networks can offer reliable and efficient communication solutions for Internet of Things (IoT) applications such as smart lighting, location-based services, home automation, smart healthcare, and industrial IoT. Therefore, hybrid VLC/RF networks are key technologies for next-generation communication systems. In this paper, a comprehensive state-of-the-art study of hybrid VLC/RF networks is carried out, divided into four areas. First, indoor scenarios are studied considering lighting requirements, hybrid channel models, load balancing, resource allocation, and hybrid network topologies. Second, the characteristics and implementation of these hybrid networks in outdoor scenarios with adverse conditions are analyzed. Third, we address the main applications of hybrid VLC/RF networks in technological, economic, and socio-environmental domains. Finally, we outline the main challenges and future research lines of hybrid VLC/RF networks.

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Revolutionizing Optical Wireless Communications via Smart Optics

Cited by 15 publications

References 110 publications

A Review–Unguided Optical Communications: Developments, Technology Evolution, and Challenges

A Review–Unguided Optical Communications: Developments, Technology Evolution, and Challenges

Design and Analysis of LCD-Based Modulator for Passive Sunlight Communications

A Review of Hybrid VLC/RF Networks: Features, Applications, and Future Directions

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