Kawther Dawood Salman; Ekhlas Kadum Hamza
Volume 21, Issue 2 , June 2021, , Page 1-15
Abstract
Wireless Fidelity (Wi-Fi) is particularly popular today. Every place hashotspots to access the internet via Wi-Fi, including homes, offices, colleges, and otherpublic places. This increased number of users, and hence the use of bandwidth, has led toradio spectrum congestion. Thus, in the year of 2011, ...
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Wireless Fidelity (Wi-Fi) is particularly popular today. Every place hashotspots to access the internet via Wi-Fi, including homes, offices, colleges, and otherpublic places. This increased number of users, and hence the use of bandwidth, has led toradio spectrum congestion. Thus, in the year of 2011, Light-Fidelity (Li-Fi) wasintroduced, which applies a visible light region for data transmission, to solve this radiocrisis problem. This visible part of the spectrum was 10,000 times big compared to thepart utilized in the Wi-Fi radio. Furthermore, Li-Fi was a sub-set of Visible LightCommunication (VLC), using Light-Emitting Diode (LED) bulbs for transmitting datautilizing light-medium. This paper reviews the differences between Li-Fi technology andwireless types. It Also focuses on the architecture, components, functioning, modulationtechnologies, and applications of Li-Fi.
Noor Abdul Khaleq Zghair; Muayad Sadik Croock; Ali Abdul Razzaq Taresh
Volume 19, Issue 2 , April 2019, , Page 69-77
Abstract
Recently, indoor localization has witnessed an increase in interest,due to the potential wide range of using in different applications, such asInternet of Things (IoT). It is also providing a solution for the absence of GlobalPositioning System (GPS) signals inside buildings. Different techniques havebeen ...
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Recently, indoor localization has witnessed an increase in interest,due to the potential wide range of using in different applications, such asInternet of Things (IoT). It is also providing a solution for the absence of GlobalPositioning System (GPS) signals inside buildings. Different techniques havebeen used for performing the indoor localization, such as sensors and wirelesstechnologies. In this paper, an indoor localization and object tracking system isproposed based on WiFi transmission technique. It is done by distributingdifferent WiFi sources around the building to read the data of the trackedobjects. This is to measure the distance between the WiFi receiver and theobject to allocate and track it efficiently. The test results show that the proposedsystem is working in an efficient way with low cost.