Publicaties
Contact-free multitarget tracking using distributed Massive MIMO-OFDM communication system : prototype and analysis Universiteit Gent KU Leuven
Wireless-based human activity recognition has become an essential technology that enables contact-free human-machine and human-environment interactions. In this article, we consider contact-free multitarget tracking (MTT) based on available communication systems. A radar-like prototype is built upon a sub-6-GHz distributed massive multiple-input and multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) communication system. ...
A survey of on-body antenna arrays : future improvements, new designs, and lessons learned Universiteit Gent
This manuscript presents a survey of the existing literature on on-body antenna arrays. They can be used to enable wireless communication to and from different on-body nodes in a wireless body area network (WBAN) and are also used in medical applications. The design process and the required characteristics of on-body antenna arrays are discussed. On-body antenna arrays should be small, lightweight, and low profile to ensure user comfort. The ...
Fast and precise neural network-based environment detection utilizing UWB CSI for seamless localization applications Universiteit Gent
Seamless localization, navigation, and tracking applications can be realized utilizing different sensors and cameras, radio frequency signals such as WiFi, ultra-wideband, and global navigation satellite system, each of which is better suited for different types of environments. As such, awareness of the environment is crucial for the system to efficiently utilize the most relevant resources in each scenario and enable seamless transition ...
Characterization of vegetation loss and impact on network performance at V-band frequencies Universiteit Gent
Wireless communication systems using millimeter-wave (mmWave) frequencies can be used for high-throughput applications such as fixed wireless access, where static line-of-sight links are used to provide internet connectivity. The directive antennas are typically mounted on building facades above street level. Therefore, the wireless links are mainly subject to attenuation due to atmospheric absorption, rain, and vegetation. In this letter, we ...
MmWave physical layer network modeling and planning for fixed wireless access applications Universiteit Gent
The large bandwidths that are available at millimeter-wave frequencies enable fixed wireless access (FWA) applications, in which fixed point-to-point wireless links are used to provide internet connectivity. In FWA networks, a wireless mesh is created and data are routed from the customer premises equipment (CPE) towards the point of presence (POP), which is the interface with the wired internet infrastructure. The performance of the wireless ...
Conformal in-body bolus antenna for precision goat farming Universiteit Gent
Precision livestock farming has seen an increased interest in the past years. To enable this technology, solid ground work needs to be done to roll-out the system. One major pillar of the ground work is the sensor to base station communication link. In this work, we present an in-body conformal bolus antenna to improve the wireless capability of the sensor nodes, as well in efficiency as in performance. Throughout the paper, we explain the ...
Measurement of the V2I channel in cell-free vehicular networks with the distributed MaMIMOSA channel sounder Universiteit Gent
In this paper, we present a small, yet realistic, vehicular cell-free massive MIMO (multiple-input multiple-output) architecture deployed at the University of Lille in a typical suburban environment under both Line-of-Sight (LOS) and obstructed LOS (OLOS) shadowing conditions. The radio channels were acquired with a distributed RF-over-Fiber (RoF) upgrade of the real-time channel sounder MaMIMOSA. The system operates at 5.89 GHz with an 80 MHz ...
Toward seamless localization : situational awareness using UWB wearable systems and convolutional neural networks Universiteit Gent
Depending on the environment, an increasing number of localization methods are available ranging from satellite-based localization to visual navigation, each with its own advantages and disadvantages. Fast and reliable identification of the environment characteristics is crucial for selecting the best available localization method. This research introduces a deep-learning-based method utilizing data collected with wearable ultra-wideband ...
Optimal frequency and wireless power budget for miniature receivers in obese people Universiteit Gent
This study investigates wireless power transfer for deep in-body receivers, determining the optimal frequency, power budget, and design for the transmitter and receiver. In particular, the focus is on small, in-body receivers at large depths up to 20 cm for obese patients. This enables long-term monitoring of the gastrointestinal tract for all body types. Numerical simulations are used to investigate power transfer and losses as a function of ...