Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Institution
Articles 1 - 11 of 11
Full-Text Articles in Systems and Communications
Lora Radio Propagation & Antenna Design For Freight Trains, Cesar Chavez, Marlon Jennson Hernandez
Lora Radio Propagation & Antenna Design For Freight Trains, Cesar Chavez, Marlon Jennson Hernandez
Electrical Engineering
Freight-train environments present significant challenges for wireless communication due to large metallic structures, varying cargo types, and changing antenna orientations that can degrade radio-frequency propagation. This project evaluated the performance of LoRa-based communication links intended for End-of-Train (EOT) and Head-of-Train (HOT) systems operating at 915 MHz. Field testing was conducted to characterize antenna performance using metrics including received signal strength indicator (RSSI), signal-to-noise ratio (SNR), and communication range. Experimental results showed that antenna polarization and directivity significantly affect communication performance in freight-train environments. Directional antennas provided improved signal strength when properly aligned but experienced performance degradation as antenna orientation changed. …
Space Quacker Advanced Development (Squad): Lora Modulation On A Leo Cubesat Mission For Evaluation Of 916 Mhz Uplink, Samantha Brunton
Space Quacker Advanced Development (Squad): Lora Modulation On A Leo Cubesat Mission For Evaluation Of 916 Mhz Uplink, Samantha Brunton
Master's Theses
The LoRa Modulation format was developed by SEMTECH in 2018 and has revolutionized terrestrial Internet of Things (IoT) networks. LoRa (Long Range) has been successfully demonstrated as a long-range, low-data-rate communication modulation format and packet protocol for low-power terrestrial applications. LoRa offers low power consumption, low cost, robust signal sensitivity, and long communication range. Recently, interest has grown in using LoRa communication in Low Earth Orbit (LEO) satellite systems, especially for global IoT connectivity. Previous studies have investigated the theoretical feasibility and simulated the performance of LoRa satellite communication. Companies such as Lacuna Space have demonstrated the practical potential of …
Project Owl: Quad Rc2, Ethan Cy Zane
Project Owl: Quad Rc2, Ethan Cy Zane
Electrical Engineering
Quad RC2 is a new radio designed to be compatible with the Cluster Duck Protocol (CDP). It must be able to act as all parts of the mesh network and be able to find its location with GPS. Much of the RC2 effort is already completed. This project ports the previously developed firmware to the new board and runs tests to assess its capabilities.
Exploration Of Software Defined Radios To Increase Capabilities Of Affordable Mesh Networks, Liam K. Mccarthy
Exploration Of Software Defined Radios To Increase Capabilities Of Affordable Mesh Networks, Liam K. Mccarthy
Electrical Engineering
Project OWL is developing a LoRa mesh network “DuckLinks” for emergency communications, and the current LoRa protocol the Clusterduck Protocol is based on is severely limited in data rate. OWL plans to use Raspberry Pi computers to develop the next phase of Duck radios, which greatly opens the computing potential and flexibility of the system the Ducks run on. Using LimeSDR and GNU Radio, an open source SDR programming environment, this project seeks to develop a simple SDR-based packet transmission system that allows for communication with Duck radios as well as the use of a different modulation scheme for higher …
Advancing Embedded Iot Architectures For Space And Terrestrial Applications, Wuwei Douglas Liu, Nicolas Jesus Alvarez, Eric Huang
Advancing Embedded Iot Architectures For Space And Terrestrial Applications, Wuwei Douglas Liu, Nicolas Jesus Alvarez, Eric Huang
Electrical Engineering
Radio transceivers play a pivotal role in establishing communication networks, particularly in regions where existing infrastructures are unstable or compromised due to natural disasters or conflicts. By utilizing LoRa (Long Range) communication technology, OWL Integrations develops radio transceivers to establish mesh networks to communicate with one another during disasters. This project team continues development of a second generation OWL board, classified as Quacker Advanced Development (QuAD), with a focus on transitioning to a new microcontroller and integrating GNSS libraries and drivers. An ulterior objective involved R&D for a space application of the board.
Multi-Hop And Automated Testing Of Wide-Area Network Radio Systems, Zachary C. Numa, Joseph S. Nuccio
Multi-Hop And Automated Testing Of Wide-Area Network Radio Systems, Zachary C. Numa, Joseph S. Nuccio
Electrical Engineering
Requests for low-power and versatile wide-area Internet-of-Things (IoT) networks are becoming more prevalent with upcoming research in low-data rate ad-hoc mesh networks. Connections to terrestrial satellites have proven promising methods for increasing range capabilities for wide area networks (WAN). As research in communication with IoT networks and satellites progresses, reliable multi-hop mesh networks for Earth-based communication are still necessary to develop the base for satellite communication. These multi-hop communication mesh networks are being developed to allow communication where Line-of-Sight (LOS) from A to B is incapable due to environmental barriers. Hence, communication is possible without LOS by providing an intermediate …
Emulating The Doppler-Shift For Lora Based Low Earth Orbit Satellite Communication, Ariel Freiman, John Stephen Gharib
Emulating The Doppler-Shift For Lora Based Low Earth Orbit Satellite Communication, Ariel Freiman, John Stephen Gharib
Electrical Engineering
This project investigates the adverse effects of the Doppler Shift on a LoRa waveform transmitted from a Low Earth Orbit Satellite or LEOSAT. This work is on behalf of Project OWL, who will use these results to justify further investment into developing a LEOSAT for their communication network. Part of the project is to design a test setup to replicate the Doppler Shift in the lab. The Doppler shift replication setup distorts the transmitted waveform, similar to how the signal gets distorted if sent from a LEOSAT. The test setup will comprise both software and hardware control, wherein software, the …
Autonomous Wildfire Detection System, Matthew Pyle, Nick Garrett
Autonomous Wildfire Detection System, Matthew Pyle, Nick Garrett
Williams Honors College, Honors Research Projects
According to the National Fire Protection Association Journal, federal wildfire suppression costs in the United States have risen from an annual average of about $425 million from 1985 to 1999 up to $1.6 billion from 2000 to 2019. On average, more than 200,000 acres in the United States are burned per year due to wildfires, with more than 700,000 acres burned in 2020 alone. With the risk of wildfire ever rising, there is a need for better early detection of remote wildfires, as existing methods often include long delays like satellites or rely on human lookout towers. The objective is …
Wildland Fire Location Management System (Wflms), Robert G. Goldie, Jack A. Gallegos
Wildland Fire Location Management System (Wflms), Robert G. Goldie, Jack A. Gallegos
Electrical Engineering
Wildland firefighters work in complex, dangerous environments where effective communication is key to developing situational awareness. Currently, the only communication firefighters have is with Very High Frequency (VHF) 160 MHz band analog radios. While digital radio protocols could potentially allow location data and commands to be sent to field crews, the technology is primarily for voice communication. This project presents a new system that frees up voice channels and uses LoRa transceivers for robust communication. The system allows for emergency and location reports to be sent to a dispatcher via an airborne repeater. The entire system is software-defined, so it …
Performance Evaluation Of Long Range (Lora) Wireless Rf Technology For The Internet Of Things (Iot) Using Dragino Lora At 915 Mhz, Victor Hugo Lopez Chalacan
Performance Evaluation Of Long Range (Lora) Wireless Rf Technology For The Internet Of Things (Iot) Using Dragino Lora At 915 Mhz, Victor Hugo Lopez Chalacan
UNF Graduate Theses and Dissertations
Internet of Things (IoT) is a developing concept that introduces the network of physical sensors that are interconnected to each other. Within this smart environment, smart objects use the interconnectivity to process, communicate, and exchange data among themselves without any human interaction. 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 …
Wireless Communication For Greenhouse Environment, Chris J. Lambert, Dean T. Lockman, Ian A. Nielsen
Wireless Communication For Greenhouse Environment, Chris J. Lambert, Dean T. Lockman, Ian A. Nielsen
Electrical Engineering
Modern day population growth and global climate change requires high-yield agricultural systems that can function in harsh environments. Greenhouses can maintain temperature and humidity, while serving as a protective, nurturing alternative to vulnerable farm environments. With weather effects eliminated, greenhouses provide productive environments for experimental agriculture techniques such as hydroponics and aquaculture. These methods of agriculture, specifically aquaculture, require constant monitoring. The failure of electronic devices such as an air pump prove fatal to a fish population in a short time frame. In developing countries, agricultural locations may be a significant distance from a farmer’s home, with no internet or …