Li-Fi Technology Research Articles

Smarter Data Transfer Through Light-Fidelity Systems

The proliferation of wireless communication technologies has spurred the exploration of novel approaches to address the increasing demand for high-speed data transmission and alleviate the challenges posed by radio frequency-based systems. Li-Fi (Light Fidelity) has emerged as a promising paradigm by harnessing visible light to establish data communication. This research paper delves into the intricate mechanics, capabilities, and potential applications of Li-Fi technology. The underlying principles of Li-Fi involve the modulation of visible light using light-emitting diodes (LEDs) to transmit data in the form of binary signals. This modulation occurs at high speeds, beyond the perceptible range of the human eye, enabling the encoding and transmission of vast amounts of data. By capitalizing on the unexplored spectrum of visible light, Li-Fi not only offers remarkable data transfer rates but also addresses concerns related to electromagnetic interference, a constraint often encountered by radio frequency-based systems. The significance of Li-Fi extends to diverse domains, including indoor wireless communication, the Internet of Things (IoT), and intelligent lighting systems. In environments where radio frequency signals encounter limitations, such as aircraft cabins and healthcare facilities, Li-Fi presents a compelling solution by providing reliable connectivity. Moreover, the integration of data communication capabilities with existing illumination infrastructure has the potential to pave the way for energy-efficient smart environments, thereby aligning with contemporary sustainability objectives.

Li-Fi technology based long range free-space communication data transmit system evaluation

AbstractThe most flexible and reliable technological system is Wi-Fi, which is made possible by a wireless connection that transmits data using radio frequencies. Wi-Fi networks, however, encounter numerous issues related to power supply, availability, efficiency, and security as a result of the various access points. While relational waves describe the medical device, Wi-Fi radios produce radio waves that are very dangerous for patients. This document offers line-of-sight communication between the transmitter and receiver using LED technology. Li-Fi technology is a method that transmits audio data using LED light, which is faster and more efficient than Wi-Fi. Since it is practically ubiquitous, light can be used for communication as well. A cutting-edge technology called optical communication includes a subset called light fidelity. By sending out visible light, the Li-Fi device enables wireless intranet communication. This paper is an in-depth study and analysis of Light Fidelity (Li-Fi), a novel technology that transmits data at high speeds over a wide spectrum by using light as a medium of transmission. The research fields that are pertinent to Li-Fi networks are thoroughly analyzed and categorized in this paper: high speed data transmission, receiving, sharing, broadcasting through light in free space optical communication system by Li-Fi technology. In this paper, we followed some methods and developed a unique method to develop this study: VLC, OOK, a Lambertian discharge mechanism, LOS, NLOS, or a CMOS optical receiver. The proposed model tested transmits and receives audio, video, and other data, which is very high-rated and near the 2 GB/s range.

Design and performance evaluation of a hybrid LiFi transceiver using OSTBC-based spatial multiplexing and transmit diversity

The need for data transmission systems that are high-speed, secure, and reliable increases as wireless communication technologies continue to advance rapidly. Light fidelity (LiFi) can meet this need through its several advantages, including high transmission rates, low electromagnetic interference, and indoor localization capabilities. This study proposes a hybrid LiFi transceiver, which utilizes LiFi technology using orthogonal space–time block coding (OSTBC), based on the spatial multiplexing (SM) and transmit diversity (Tx). The suggested hybrid LiFi transceiver aims to integrate the advantages of OSTBC, Tx diversity, and SM techniques to enhance the performance of the overall transceiver. The suggested transceiver plan to implement one of the diversity techniques, which are either Tx diversity or SM at a time. The selected technique will depends on the channel quality, optimizing the transceiver's throughput and ensuring effective utilization of the available spectrum. Through simulation results, this research aims to demonstrate that the proposed hybrid LiFi transceiver surpasses conventional LiFi transceivers that lack Tx diversity or SM. Anticipated outcomes of this research include superior data rates, enhanced reliability, and increased resilience against real channel impairments. These findings hold substantial promise for applications that requires high-speed and reliable communication, including smart homes, the Internet of Things, and forthcoming 5 G/6 G communication networks.

Performance study of an improved version of li-fi and wi-fi networks

With the increasing demand and need for telecommunication technologies, wireless communication has become a heavily useful and widely popular utility. Capacity, availability, efficiency, and security are issues generally linked to wireless communications, more specifically Wi-Fi systems. Yet we can exploit billions of light bulbs, which we use anywhere and everywhere on a daily basis and of which the infrastructure is already part of our ordinary life. This study focuses on Li-Fi theory and practices. The purpose of this paper is to demonstrate how these light sources can be used as a transmitter or, to be more precise, as an access point. This idea was proposed for the first time by Prof. Harald Hass in Global TED (2011). During the last two years, Li-Fi technology has been enhanced and improved by many professional and international studies. As new wireless communication technology develops to use LED, the efficiency, availability, security, and safety of light fidelity transform today’s telecommunication into tomorrow’s visible light communication.

Need of Li-Fi (light fidelity) technology for the world to track COVID-19 patients

In this modern world, a single day without light or the internet is unimaginable. Nowadays, wireless fidelity, often known as Wi-Fi, is the most well-known and commonly utilized conventional wireless technology. Wi-Fi employs radio waves or electromagnetic waves to carry data across networks. Imagine if a basic LED light in and around the hospital could link us to high-speed wireless internet with just a simple flickering of light at a very high speed where eyes cannot detect it. This technology is known as Li-Fi, or light fidelity, and it is 10,000 times faster than Wi-Fi. Hospitals are among the locations where Wi-Fi is absolutely forbidden. As doctors are the frontline soldiers against COVID-19, the objective of this project is to develop smart healthcare systems that use green communications to monitor COVID-19 patients using temperature, pressure, and heart rate sensors from Li-Fi transmitter to Li-Fi receiver by using simple LED light as a medium to transmit the data or information of COVID-19 to the cloud by using Li-Fi Dongle.

Li-Fi technology-based long-range FSO data transmit system evaluation

Visible light is used by a technology known as Light Fidelity to establish wireless internet connections very quickly. This article offers line-of-sight communication between the transmitter and receiver using LED technology. Li-Fi technology is a method that transmits data using LED light, which is faster and more efficient than Wi-Fi. Since it is practically ubiquitous, light can be used for communication as well. A cutting-edge technology called optical communication includes a subset called Li-Fi. By sending out visible light, the Li-Fi device enables wireless intranet communication. An in-depth study and analysis of Li-Fi, a novel technology that transmits data at high speeds over a wide spectrum by using light as a medium of transmission.

Li-Fi Technology Based Long Range Free-Space Optics Data Transmit System Evaluation

INTRODUCTION: The most flexible and reliable technological system is Wi-Fi, which is made possible by a wireless connection that transmits data using radio frequencies. Wi-Fi networks, however, encounter numerous issues related to power supply, availability, efficiency, and security as a result of the various access points. While relational waves describe the medical device, Wi-Fi radios produce radio waves that are very dangerous for patients. This document offers line-of-sight communication between the transmitter and receiver using LED technology. Li-Fi technology is a method that transmits audio data using LED light, which is faster and more efficient than Wi-Fi. Since it is practically ubiquitous, light can be used for communication as well. A cutting-edge technology called optical communication includes a subset called light fidelity. By sending out visible light, the Li-Fi device enables wireless intranet communication. This paper is an in-depth study and analysis of Light Fidelity (Li-Fi), a novel technology that transmits data at high speeds over a wide spectrum by using light as a medium of transmission. The research fields that are pertinent to Li-Fi networks are thoroughly analyzed and categorized in this paper.OBJECTIVES: High speed data transmission, receive, share, broadcast through light in free space optical communication system by Li-Fi technology.METHODS: We followed some methods and developed a unique method to develop this project. which is VLC, OOK, a Lambertian discharge mechanism, LOS, NLOS, or a CMOS optical receiver.RESULTS: Successfully, we transmitted and received audio, video, and other data, which is very high-rated and near the 2 GB/s range.CONCLUSION: Visible light communication may be a fast-evolving technique in the field of wireless technology. Li-Fi is a wireless data transfer system that is both fast and inexpensive. It can also be used in potentially hazardous situations, such as in nuclear power plants, without causing electromagnetic interference. We are considering adding more features to our project in the future to get better outcomes.

Smart Home Automation System Based on Li-Fi Technology

In general, home automation means controlling the utilities and features of the household appliances. To achieve this most automation systems use Wi-Fi as a communication technology. But when it comes to Wi-Fi the overall setup cost will be higher and it also not possible to connect all the household appliances to the network. For that we had proposed a system called smart home automation system based on Li-Fi technology. Since its Li-Fi, a VLC, we can use our domestic household LED lights as a transmitting source. This system will control the power up function of the appliances. And the overall setup of this system is very simple on both the hardware and software sides. The specific light encoded data will be transmitted by the LEDs and decoded by photodiode at the receiver section. By implementing this Li-Fi technology in home automation will bring the new era of automation with simple, speed, cost-effective and secure features. And this will be the dual benefits of both luminance and automation in a single implementation setup. And on the security side also it will provide secure communication with the ability to be impenetrable through physical objects because of the nature of light. Not only smart devices, every electrical device can be operated with this technology implementation. Key Word: Home Automation; LI-FI; Sensor; Connection; Future

A Novel Approach to Increase Data Transfer Rate in WIFI Network

Due to the proliferation of devices and the rise of applications that rely heavily on data, the demand for high-speed data transfer in WiFi networks has been rising rapidly in recent years. However, due to their limitations in terms of data transfer rate and capacity, conventional WiFi networks have prompted the investigation of novel strategies to address these issues. By combining beamforming techniques with Multiple Input Multiple Output (MIMO) technology, this study proposes a novel strategy for increasing the data transfer rate in WiFi networks. Multiple data streams can be transmitted simultaneously using MIMO technology, effectively increasing bandwidth and data transfer rate. The proposed approach explains the potential of using a hybrid LiFi-WiFi network was also explored to further increase the data transfer rate in WiFi networks. LiFi technology uses light waves instead of radio waves to transmit data and has the potential to provide faster data transfer rates than WiFi networks. The research was motivated by the limitations of conventional approaches and the rising demand for high-speed data transfer in WiFi networks. The new solution proposed in this approach has the potential to address these limitations and significantly increase the rate of data transfer.

Image and Text Transmission using Li-Fi Technology

This research paper focuses on the use of LiFi (Light Fidelity) technology for the transmission of image and text data. LiFi technology is an emerging technology that uses visible light communication (VLC) for data transmission, providing a high-speed and secure wireless communication system. In this project, a LiFi system is developed using an LED (Light Emitting Diode) bulb and a photodiode receiver to transmit and receive data. The system is tested for its ability to transmit image and text data at a high speed and with minimal interference. The results show that LiFi technology can provide a viable alternative to traditional wireless communication systems for certain applications, such as indoor communication and data transfer, where security and high-speed data transfer are essential. Overall, this research demonstrates the potential of LiFi technology as a reliable and secure means of wireless data transmission

UNDERWATER COMMUNICATION USING LIFI

As far as terrestrial applications, underwater wireless communication is not a straight forward process. The objective of this wireless underwater communications can be established by Li-Fi technology along with the use of LED and photodiode. The Li-Fi module passes the message to the destination underwater. Underwater communication is required in many applications such as the transfer of messages and speech transmission between submarine ships, Scuba drivers, etc., and to track lost ships and located down planes. Since Li-Fi technology used in underwater communication can be done the data rate would be near as the terrestrial data communications. Since the transmitted signal is in encoded form, so the hacker cannot track the signals easily, so the privacy/Security of information is obtained. So that data is not last.

Analysis of Bit Rate and Distance Variation on Multiplexing System of Indoor Li-Fi Technology Using Movable LED Panel

The major problem of using light fidelity (Li-Fi) technology is still limited to the line of sight (LOS) conditions, which poses a challenge to perform bandwidth efficiency to support increased bit rates, especially for indoor use. In addition, the distance between the lamp driver (transmitter) and the receiver becomes a critical discussion to determine the characteristics of propagation losses. Therefore, this study focuses on analyzing the performance of an indoor Li-Fi multiplexing system using a movable LED panel (LP) based on parameters of bit rate and distance variation on multiple-input multiple-output (MIMO) 2x2 and 4x4. The parameter analysis of signal quality included optical and electrical signal spectrum characteristics, signal-to-noise ratio (SNR), bit error rate (BER), and Q-factor parameters. Based on the results, the increase in bit rate and distance significantly increases the BER value and decreases the Q-factor value. Both the 2x2 and 4x4 mux systems can meet standards up to a bit rate of 30 Mbps at a LOS distance of 3 meters, while at a bit rate of 40 Mbps, there are no channels that meet the ITU-T standard. In addition, the quality of the signal received at a distance of 4 meters, the 2x2 mux system can only reach the standard at a bit rate of 20 Mbps for all channels. However, channel 3 and channel 4 on the 4x4 mux system model still have the BER and Q-factor values that meet the standard in the bit rate of 30 Mbps. However, the decrease in the SNR value affected by the bit rate increase and distance is insignificant. Therefore, it becomes an opportunity for further observation of the proposed multiplexing system, detection scheme, or responsivity, and signal processing on the receiver side to be reliable on the higher bit rate.

A Review: Vehicle to Vehicle Communication Using Li-Fi Technology

Light Fidelity or Li-Fi, is a form of communication that relies on using light as a medium. This method, known as Visible Light Communication, eliminates the complexity of cable transmission (VLC). Li-Fi has proven to be safe, efficient, and capable of delivering data at extremely high rates as it has evolved over the past few years. The proposed study investigates the viability of integrating Li-Fi into a communication system by describing the architecture, the modulation techniques, and the advantages and disadvantages of Li- Fi. In order to communicate data from a transmitter to a receiver in the communication system utilized in this research to control the speeds of two motors, light is used as the medium. Key Words: V2V, Li-Fi, VLC, Visible Light Spectrum

A Novel Social Distancing Approach for Limiting the Number of Vehicles in Smart Buildings Using LiFi Hybrid-Network

The coronavirus (COVID-19) has arisen as one of the most severe problems due to its ongoing mutations as well as the absence of a suitable cure for this virus. The virus primarily spreads and replicates itself throughout huge groups of individuals through daily touch, which regretfully can happen in several unanticipated way. As a result, the sole viable attempts to constrain the spread of this new virus are to preserve social distance, perform contact tracing, utilize suitable safety gear, and enforce quarantine measures. In order to control the virus's proliferation, scientists and officials are considering using several social distancing models to detect possible diseased individuals as well as extremely risky areas to sustain separation and lockdown procedures. However, models and systems in the existing studies heavily depend on the human factor only and reveal serious privacy vulnerabilities. In addition, no social distancing model/technique was found for monitoring, tracking, and scheduling vehicles for smart buildings as a social distancing approach so far. In this study, a new system design that performs real-time monitoring, tracking, and scheduling of vehicles for smart buildings is proposed for the first time named the social distancing approach for limiting the number of vehicles (SDA-LNV). The proposed model employs LiFi technology as a wireless transmission medium for the first time in the social distance (SD) approach. The proposed work is considered as Vehicle-to-infrastructure (V2I) communication. It might aid authorities in counting the volume of likely affected people. In addition, the proposed system design is expected to help reduce the infection rate inside buildings in areas where traditional social distancing techniques are not used or applicable.

Smart V2V Communication Based on Li-Fi

In this article, Li-Fi is introduced as a communication system with its modulation techniques, and the entire architecture is explained. The challenges and benefitsof Li-Fi are described with its goal to provide high-speed data transmission being one of its biggest benefits. The project's realization of a V2V communication application, in which the speed of both engines is controlled using Li-Fi, is how the Li-Fi implementation is demonstrated.The data is transmitted from one control unit to another and that controls the speed of the engine. The required system analysis with the block diagrams is also provided. It is therefore concluded that the Li-Fi is used as a communication tool and that both engine speeds are checked. In addition to the above, this framework will identify, and detect the vehicle drivers who drink alcohol and get inside the vehicle for access to drive the vehicle. After detection of the driver's status, this framework sends the details to the concerned authority. Once the concerned authority receives the data about the particular vehicle, it will alert the neighboring vehicle drivers about its current status . The issue of more or heavy traffic during vehicle movement in a particular region is identified. The vehicle speed of the neighboring vehicles is also calculated and if it violates the traffic rules, this proposed framework shall send data to the concerned authority for further action againstthe vehicle driver. The above-said issues are discussed in this paper with the help of Li-Fi technology implemented with the microcontroller-based Arduino.

Enhancement of Light Fidelity System According to Multi-Users Utilizing OCDMA Technology under Weather Conditions

Due to the significant need for modern technologies to meet the growing requirements of wide bandwidths, high levels of security, and high speeds. Considered Light fidelity is a future technology optical WC system that employs VL to transport data in open space. The end-user has employed VLC based on (LEDs). This technique provides a high data transfer rate, higher security, and less interference with other radio frequencies. This study investigates Li-Fi System Performance based on OCDMA/FOS under Effective Weather conditions on L-band frequency. LI-FI technology faces many challenges in maintaining system performance owing to the rise in user numbers and the different weather conditions. This causes the system performance to decrease in BER, Q-factor, power, etc. and maintains good security at the lowest possible costs and the best results. Proposed system, in addition to measuring the frequency filtering amount used in the proposed system, The results showed a significant improvement using the proposed technique, where the system achieved the error bit rate in clear weather from 3.93 * 10-28 to 2.5 * 10-24, and also in dusty weather, it achieved from 1.7 * 10-28 to 8 * 10-23 in addition to that The amount of frequencies filtering in UFBG This means that the minimum amount to use the filter feature is1.2nm. Suggested design has proven its ability to maintain acceptable performance in end-user in light of the increase in the number of users.

Li-Fi BASED HEALTH MONITORING SYSTEM FOR INFANTS

The objective of the project is to design an infant health monitoring system based on LI-FI Technology. In this project we are continuously monitoring an infant through LI-FI Technology, it transmits data faster than WI-FI. The patient parameters are quickly transmitted via LI-FI transmitter, and it is received by LI-FI Receiver. For each parameter different sensors are used to monitor patient health in real time. We are transmitting and receiving data via LI-FI Technology. The sensors like SpO2 sensor for monitoring patient’s blood oxygen saturation and pulse level, temperature sensor is used to monitor patient body temperature, All these parameters are stored in Arduino microcontroller and then it will be uploaded and Receiver receive a data from LI-FI transmitter and it will be displayed, In case of emergency doctor can provide treatment for the particular infant based on the parametric value. This method is efficient than conventional systems. The main advantage of this project is implementation of LI-FI technology for faster data transmission and to avoid the presence of electromagnetic radiations.

Highway Navigation System Using Li-Fi

Light is present everywhere as street lamp and traffic light. Imagine that all these light bulbs are high speed wireless transmitter that connects either human to human or systems with systems. In recent times the using of internet is rapidly increase which leads to radio waves being widely used. Long distance data transmission makes use of this spectrum. It has become difficult to keep up with the demand for the high speed connectivity as the number of users is increasing. An alternative and advantageous replacement can be visible light communication (VLC).In this paper, Li-Fi technology is used to build the highway navigation system. The Li-Fi technology based on the visible light communication and it is one of the applications of VLC. Frequently we have to navigating one place to another place. The major issues faced by drivers are navigating at night. Low battery of mobile phone or network connectivity issues are the major problems to use the Gmap. This paper proposes a system which aims to provide efficient and secure communication between vehicles and the street light .To improve safety and reduce accidents in roads at night we are using this system .In this system, LED lights embedded in the highway street light that act as a data transmitter and the receiver are installed on vehicles like car, truck to receive and process the data without using internet. The received information is then displayed on a display screen in the vehicle, such as current location and future diversions. This system is alternate solution for the road navigation board system. In this system the Arduino UNO is used in the transmitter and receiver portions, and it is programmed using the Arduino IDE. The overall the highway navigation system using Li-Fi technology to improve traffic safety and efficiency while reducing the environmental impact of transportation.

Li-Fi concept in terms of modulation techniques

Li-Fi (light fidelity) is a bidirectional wireless system that transmits data via LED or infrared light. Li-Fi technology only needs a light source with a chip to transmit an internet signal through light waves. The system has a receiver to pick up light signals and transmitter to send light signals back to the lamp using infrared light. The technology has high data rate as well as high spectral efficiency and also robust against inter symbol interference. Different forms of OFDM (a multicarrier modulation technique) are being used for Li-fi scheme. This paper reflects the theoretical study of various modulation techniques of Li-fi technology.

Hybrid mmWave-Li-Fi 5G Architecture for Reconfigurable Variable Latency and Data Rate Communications

Despite modern vehicles having the necessary advanced driver assistance systems (ADAS) for autonomous operation, current implementations rely solely on sensor information from the surrounding environment or data from smart infrastructure. However, shortcomings in current implementations and standards around cost-effective variable latency and data rate have prevented widespread adoption of the technology to enable autonomous operation. This paper presents a proof-of-concept (PoC) reconfigurable design and performance of a hybrid high-ultra-high bands [i.e., millimetre-Wave (mmWave)-light fidelity (Li-Fi)] fifth generation (5G) architecture for autonomous vehicular communication applications. The hybrid multiple input multiple output (MIMO) system architecture design is mathematically modelled and presented. The reported prelim PoC validation focuses on the Li-Fi experiment and results. The proposed hybrid system’s effectiveness was evaluated using the open-source “Model-based Autonomous Traffic Simulation” (MOBATSim). The simulation results of a potential Li-Fi system and a PoC prototype are presented to demonstrate the role of the Li-Fi system in the proposed hybrid mmWave-Li-Fi 5G architecture. Three models of LED/lamp and two models of photodiode were simulated at three different vehicle speeds to ascertain the potential of the system. Promising results are reported at low speeds with received power values of up to -8.39 dBm and signal to noise ratios of up to 29.39 dB. Practical prototype simulations showed auspicious results including received power of -24.6 dBm to -34.12 dBm at the vehicle speeds of 10 MPH to 30 MPH respectively. The implemented PoC Li-Fi technology component has demonstrated the ability to transmit information with a theoretical output of 333 bits per second at 1.92 m, without the use of any high-power processors, components, and modulation techniques. The proposed system yields high data rates due to reconfigurable high bandwidth channels; many simultaneous multimedia mmWave-Li-Fi connections enabled due to spatial reuse with narrow beams; and easier mmWave-Li-Fi ultra-low latency support occasioned by smaller packet sizes. This holds a great promise for the hybrid 5G/6G mmWave-Li-Fi autonomous vehicular communication use case and/or applications.