Performance Evaluation of Long Range (LoRa) Wireless RF Technology blue for the Internet of Things (IoT) Using Dragino LoRa at 915 MHz

Internet of Things (IoT) is a developing concept that introduces the network of physical sensors which are interconnected to each other. Some sensors are wirelessly connected among themselves and to the internet. Currently, IoT applications demand substantial requirements in terms of Radio Access Network (RAN) such as long-range outdoor coverage, environmental factors, obstructions, interference, power consumption, and many others. Also, the current wireless technologies are not able to satisfy all these requirements simultaneously. Therefore, there is no single wireless standard that would predominate the IoT. However, one relevant wireless radio solution to IoT is known as Long Range Wide Area Network (LoRaWAN), which is one of the Low Power Wide Area Network (LPWAN) technologies. LPWAN has appeared as a significant solution to offer advantages such as long-range coverage connectivity with low power consumption, an unlicensed spectrum, and affordability. Most likely LoRa with the inherent long-range coverage and low power consumption features will become the “go-to” technology for IoT applications. For that reason, the proposed research entails the performance evaluation of LoRa IoT application under different scenarios at the University of the North Florida campus. Each scenario includes dynamic and static tests that focus on performance evaluation of the LoRaWAN physical-layer, such as different configurations, coverage range, strength and quality indicators (RSSI and SNR respectively), test schedules, and environmental factors. This application will involve connecting to different IoT servers in the cloud, such as The Things Network (TTN), Amazon Web Services (AWS), integration with Cayenne

Performance Analysis of Indoor Optical Wireless Links

Indoor wireless optical communication is a good alternative to existing mature RF technology. However various challenges in indoor optical wireless technology are due to free space loss, ambient light, and multi path dispersion causing inter symbol interference (ISI). The degradation in performance due to these facts is very much influenced by the channel topology. So in this paper the performance of indoor optical configuration has been analyzed using three types of channel topologies viz., directed (LOS), non-directed (LOS), and multi beam diffused link for various transmitter and receiver design parameters. The analysis has been carried using Optiwave simulation tools

Free space optical communication

This book provides an in-depth understanding of free space optical (FSO) communication with a particular emphasis on optical beam propagation through atmospheric turbulence. The book is structured in such a way that it provides a basic framework for the beginners and also gives a concise description from a designer’s perspective. The book provides an exposure to FSO technology, fundamental limitations, design methodologies, system trade-offs, acquisition, tracking and pointing (ATP) techniques and link-feasibility analysis. The contents of this book will be of interest to professionals and researchers alike. The book may also be used as a textbook for engineering coursework and professional training

The probability of error in FSO communication system using Differential Chaos Shift Keying

In present-day communication system, Free Space Optical (FSO) communication is in demand due to its various advantages such as large bandwidth, high capacity, license-free spectrum, high directivity, low power consumption, cost effectiveness, etc. The basic concern for any communication system is its privacy and security. Although FSO communication is more secure as compared to conventional radio frequency (RF) systems, there are still chances of leakage of information. Here, chaotic signals are used in order to ensure the guaranteed reception only by the intended-receiver and not by any other external agent. In this manuscript, Differential Chaos Shift Keying (DCSK) in FSO system taking Gamma–Gamma turbulence model is studied as it is easy to implement and one of the robust techniques for wireless multipath channels. The system performance is analyzed using probability of error as a metric for various link lengths, spreading factor and turbulence condition. It is observed that an increase in spreading factor results in increase of average signal-to-noise ratio (SNR) for same link length, probability of error and turbulence conditions. Therefore we have to compromise between high SNR and security for DCSK based FSO communication system