Publications
Chosen filters:
Chosen filters:
Establishing transparent IPv6 communication on LoRa based Low Power Wide Area Networks (LPWANS) Vrije Universiteit Brussel
New Long-Range radio technologies have recently appeared in the IoT landscape. Combining the existing communication
protocols with these novel radio technologies could increase the potential opportunities and the diversity of use cases
for Wireless Sensor Networks. In this paper, an implementation of a LoRa based sensor platform that uses the Contiki OS is
proposed, in order to enable standardized IPv6 LoRa communications. This ...
protocols with these novel radio technologies could increase the potential opportunities and the diversity of use cases
for Wireless Sensor Networks. In this paper, an implementation of a LoRa based sensor platform that uses the Contiki OS is
proposed, in order to enable standardized IPv6 LoRa communications. This ...
Experimental parameter optimization for adaptive LoRa modulation in body-centric applications Ghent University
The relentless expansion of the Internet of Things is fueled by constant innovations in low-power wide-area network technologies. Industry forerunners such as LoRa, SigFox and NB-IoT continuously seek to achieve larger communication ranges while consuming as little energy as possible. These efforts, in turn, facilitate vast performance increases in a wide range of related application areas, such as body-centric communication. For example, ...
A Multi-Channel Software Decoder for the LoRa Modulation Scheme Hasselt University
LoRa is a recently introduced modulation scheme specifically designed for Low-Power Wide-Area Networks. In this paper, we provide the first detailed and complete description of the LoRa PHY layer, and present a novel methodology for detecting and decoding LoRa frames using Software Defined Radios. Our proposed decoding approach can efficiently decode multiple channels simultaneously in software due to an invariance towards the signal frequency. ...
LoRa base-station-to-body communication with SIMO front-to-back diversity Ghent University
The LoRa standard is currently widely employed for low-power long-range wireless sensor networks at sub-GHz frequency bands. The longer wavelengths associated with sub-GHz technology provide excellent radiowave propagation characteristics, yielding a much larger coverage than the higher frequency bands. In the case of wearable sensors, the 868 MHz band can be covered by textile substrate-integrated-waveguide antennas of a convenient size. In ...
Enabling RPL multihop communications based on LoRa Vrije Universiteit Brussel
New Long-Range radio technologies have recently emerged in the IoT landscape. These technologies work in the Sub-GHz bands, allowing low-power communications over long distances. They are typically based on star-topology networks, where nodes send the data directly to a base station connected to the Internet. One of such technologies is LoRa. Enabled LoRa-based multihop communications would open up new possibilities. In this paper we present ...
Demo: Development and demonstration of a LoRa TDOA-based localisation system Vrije Universiteit Brussel
The demonstrator addresses the problem of localising a trans-
mitter using time dierence of arrival (TDOA) between pairs
of nodes in a Long Range (LoRa) wireless sensor network
(WSN). The proposed frequency counter scheme is able to
timestamp multiple incoming LoRa (burst) transmissions in
an eort to accurately determine the dierence in arrival
across multiple base stations. Our proposed system demon-
strates ...
mitter using time dierence of arrival (TDOA) between pairs
of nodes in a Long Range (LoRa) wireless sensor network
(WSN). The proposed frequency counter scheme is able to
timestamp multiple incoming LoRa (burst) transmissions in
an eort to accurately determine the dierence in arrival
across multiple base stations. Our proposed system demon-
strates ...
Wearable 868 MHz LoRa wireless sensor node on a substrate-integrated-waveguide antenna platform Ghent University
Nowadays, wireless sensor networks at sub-GHz frequencies are becoming more and more ubiquitous, owing to their impressive link budget. One of the most widespread standards is LoRa, employing Chirp Spread Spectrum modulation to achieve a relatively high data rate at low transmit powers. The latter is ideal for body-centric communication, but the challenge for wearable devices consists in keeping the antenna dimensions sufficiently small. By ...
TDoA-based outdoor positioning in a public LoRa network Ghent University
The performance of LoRa Geo-location for outdoor tracking purposes has been evaluated on a public LoRaWAN network. Time Difference of Arrival (TDOA) localization accuracy, probability and update frequency were evaluated for different trajectories (walking, cycling, driving) and LoRa spreading factors. A median accuracy of 200m was obtained and in 90% of the cases the error was less then 480m.
Experimental performance evaluation of outdoor TDoA and RSS positioning in a public LoRa network Ghent University
This paper experimentally compares the positioning accuracy of TDoA-based and RSS-based localization in a public outdoor LoRa network in the Netherlands. The performance of different Received Signal Strength (RSS)-based approaches (proximity, centroid, map matching,...) is compared with Time-Difference-of-Arrival (TDoA) performance. The number of RSS and TDoA location updates and the positioning accuracy per spreading factor (SF) is assessed, ...