Stefan Videv
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View article: 100 Gbps Indoor Access and 4.8 Gbps Outdoor Point-to-Point LiFi Transmission Systems Using Laser-Based Light Sources
100 Gbps Indoor Access and 4.8 Gbps Outdoor Point-to-Point LiFi Transmission Systems Using Laser-Based Light Sources Open
In this paper, we demonstrate the communication capabilities of light-fidelity (LiFi) systems based on high-brightness and high-bandwidth integrated laser-based sources in a surface mount device (SMD) packaging platform. The laser-based so…
View article: 100 Gbps Indoor Access and 4.8 Gbps Outdoor Point-to-Point LiFi Transmission Systems using Laser-based Light Sources
100 Gbps Indoor Access and 4.8 Gbps Outdoor Point-to-Point LiFi Transmission Systems using Laser-based Light Sources Open
In this paper, we demonstrate the communication capabilities of light-fidelity (LiFi) systems based on highbrightness and high-bandwidth integrated laser-based sources in a surface mount device (SMD) packaging platform. The laserbased sour…
View article: Analysis of guest ratings and reviews from the platform “Booking’’ for destination Plovdiv
Analysis of guest ratings and reviews from the platform “Booking’’ for destination Plovdiv Open
Using the methods of comprehensive statistical research, case study and content analysis, the current article tries to summarize the information from guest reviews available in the platform “Booking” for destination Plovdiv, to compare the…
View article: Tourism as an economic diversification tool in mountain rural regions (research on the rural tourism facilities in several towns and villages in Smolyan District)
Tourism as an economic diversification tool in mountain rural regions (research on the rural tourism facilities in several towns and villages in Smolyan District) Open
Smolyan district is characterized on one side by uneven development of the tourism branch with prevelance of mass tourism, which leads to toverconcentration of tourists flow only in two of the municipals – Chepelare and Smolyan and on one …
View article: The local feast “Young wine festival” as a marketing, tourist and cultural event
The local feast “Young wine festival” as a marketing, tourist and cultural event Open
The current article focuses on the local feast "Young Wine Festival”. An attempt has been made to position the festival in comparison to other festival events as well as to wine events and tours held in our country. Based on this, its mark…
View article: 5G-CLARITY: 5G-Advanced Private Networks Integrating 5GNR, WiFi, and LiFi
5G-CLARITY: 5G-Advanced Private Networks Integrating 5GNR, WiFi, and LiFi Open
The future of the manufacturing industry highly
\ndepends on digital systems that transform existing
\nproduction and monitoring systems into autonomous systems fulfilling stringent requirements in
\nterms of availability, reliability, sec…
View article: Effect of Sunlight on Photovoltaics as Optical Wireless Communication Receivers
Effect of Sunlight on Photovoltaics as Optical Wireless Communication Receivers Open
This paper explores the effects of sunlight on using a low-cost off-the-shelf silicon solar panel as an optical wireless communication (OWC) receiver. A receiver circuit structure has been proposed to maximize simultaneous energy harvestin…
View article: Organic photovoltaics for simultaneous energy harvesting and high-speed MIMO optical wireless communications
Organic photovoltaics for simultaneous energy harvesting and high-speed MIMO optical wireless communications Open
View article: Towards Energy Neutral Wireless Communications: Photovoltaic Cells to Connect Remote Areas
Towards Energy Neutral Wireless Communications: Photovoltaic Cells to Connect Remote Areas Open
In this work, we have designed, developed and deployed the world’s first optical wireless communication (OWC) system using off-the-shelf lasers and solar photovoltaics. Four bidirectional OWC prototypes have been installed on the Orkney Is…
View article: Pump-power-dependence of a CsPbBr<sub>3</sub>-in-Cs<sub>4</sub>PbBr<sub>6</sub> quantum dot color converter
Pump-power-dependence of a CsPbBr<sub>3</sub>-in-Cs<sub>4</sub>PbBr<sub>6</sub> quantum dot color converter Open
A detailed study of the pump-intensity dependent characteristics of an all-inorganic CsPbBr3-in-Cs4PbBr6 quantum dot (QD) color converter are reported. This is an attractive material to color convert UV/blue GaN optical pump sources for di…
View article: Operating an In-Cabin Femto-Cellular System Within a Given LTE Cellular Network
Operating an In-Cabin Femto-Cellular System Within a Given LTE Cellular Network Open
An onboard mobile communication system can be operated when the height of an aircraft is above 3000 m and the maximum equivalent isotropic radiated power outside an aircraft is below -13 dBm for 200 kHz bandwidth in a 1800 MHz system based…
View article: 0.5-Gb/s OFDM-Based Laser Data and Power Transfer Using a GaAs Photovoltaic Cell
0.5-Gb/s OFDM-Based Laser Data and Power Transfer Using a GaAs Photovoltaic Cell Open
In this letter, we demonstrate for the first time the additional capability of high-speed data communication for single-junction photovoltaic (PV) cells. A record 3-dB bandwidth of 24.5 MHz is reported for a gallium arsenide (GaAs) PV cell…
View article: The Impact of Solar Irradiance on Visible Light Communications
The Impact of Solar Irradiance on Visible Light Communications Open
This paper aims to address the perception that visible light communication (VLC) systems cannot work under the presence of sunlight. A complete framework is presented to evaluate the performance of VLC systems in the presence of solar irra…
View article: Flexible Glass Hybridized Colloidal Quantum Dots for Gb/s Visible Light Communications
Flexible Glass Hybridized Colloidal Quantum Dots for Gb/s Visible Light Communications Open
Color converting films of colloidal quantum dots (CQDs) encapsulated with flexible glass are integrated with microsize GaN LEDs (μLEDs) in order to form optical sources for high-speed visible light communications (VLC). VLC is an emerging …
View article: 15 Gb/s OFDM-based VLC using direct modulation of 450 GaN laser diode
15 Gb/s OFDM-based VLC using direct modulation of 450 GaN laser diode Open
A record data rate for visible light communications (VLC) using a transistor outline (TO) packaged Gallium Nitride (GaN) laser diode is reported. Using a system 3 dB bandwidth of 1.4 GHz data transmission at 15 Gb/s is reported. This is ac…
View article: Towards 10 Gb/s orthogonal frequency division multiplexing-based visible light communication using a GaN violet micro-LED
Towards 10 Gb/s orthogonal frequency division multiplexing-based visible light communication using a GaN violet micro-LED Open
Visible light communication (VLC) is a promising solution to the increasing demands for wireless connectivity. Gallium nitride micro-sized light emitting diodes (micro-LEDs) are strong candidates for VLC due to their high bandwidths. Segme…
View article: Indoor Optical Wireless Power Transfer to Small Cells at Nighttime
Indoor Optical Wireless Power Transfer to Small Cells at Nighttime Open
The application of wireless backhaul communication and power transfer to outdoor small cells (SCs) could significantly decrease their installation cost. In this paper, the concept of indoor optical wireless power transfer to SCs is investi…
View article: Organic solar cells as high-speed data detectors for visible light communication
Organic solar cells as high-speed data detectors for visible light communication Open
Funding: Engineering and Physical Sciences Research Council (EPSRC) (EP/I00243X, EP/K00042X/1, EP/K008757/1).
View article: Unlocking Spectral Efficiency in Intensity Modulation and Direct Detection Systems
Unlocking Spectral Efficiency in Intensity Modulation and Direct Detection Systems Open
A number of inherently unipolar orthogonal frequency division multiplexing (OFDM) modulation schemes have been introduced recently in an attempt to improve the energy efficiency of OFDM-based intensity modulation and direct detection (IM/D…
View article: Towards a 100 Gb/s visible light wireless access network
Towards a 100 Gb/s visible light wireless access network Open
Potential visible light communication (VLC) data rates at over 10 Gb/s have been recently demonstrated using light emitting diodes (LEDs). The disadvantage is, LEDs have an inherent trade-off between optical efficiency and bandwidth. Conse…
View article: On the Design of a Solar-Panel Receiver for Optical Wireless Communications With Simultaneous Energy Harvesting
On the Design of a Solar-Panel Receiver for Optical Wireless Communications With Simultaneous Energy Harvesting Open
This paper proposes a novel design of an optical wireless communications (OWC) receiver using a solar panel as a photodetector. The proposed system is capable of simultaneous data transmission and energy harvesting. The solar panel can con…