Development and Assessment of Resource Management Solutions for Throughput Enhancement in a RIS-aided Mobile Network

Reconfigurable Intelligent Surfaces (RIS) are envisioned to become a pivotal transformative technology within the realm of 6G mobile networks. In this study, we introduce three heuristic algorithms designed to optimize radio resource management, ultimately enhancing throughput within a RIS-enhanced mobile network. Our findings demonstrate that...

Power Consumption Analysis of 5G Transmit Antenna Topologies and Beamforming Schemes

An exponential growth in the mobile communications industry over the past decade has raised concerns over it’s energy consumption, especially in light of the current climate crisis. 5G technologies in particular exhibit features that imply high power consumption, such as the densification of 5G base stations. Implementing mitigation measures...

Using beamforming to maximise the detection capability of Kwintsheul’s seismic array

To run Nature’s Heat geothermal operations (Kwintsheul, The Netherlands) in a safe and efficient manner, and with the support of the local population, it is important to mitigate potential hazards. A well known potential hazard related to geothermal operations is the occurrence of induced seismicity due to injection and extraction of fluids in...

Clock skew invariant beamforming: for a wireless acoustic sensor network

This thesis is focused on Wireless Acoustic Sensor Networks (WASNs) used for beamforming in a speech enhancement task. Since each node in a WASN has its own clock, clock offsets and clock skews between the nodes are inevitable. Clock offsets and clock skew can be detrimental to the beamformer performance. In this thesis we focus on the effect of...

Assessing the performance of two new acoustic imaging techniques

These are exciting times to work in the field of acoustics: researchers have a more granular understanding of sound than ever before due to the ability to acquire, store and analyze unprecedented amounts of acoustical data. The purpose of acoustic imaging is noise reduction. If noise can be measured, it can be reduced. Acoustic imaging is...

Acoustic Array Design: The design of a reconfigurable phased microphone array for aeroacoustic wind tunnel measurements

Since both the aircraft and wind energy sectors are experiencing rapid growth, improvements must be made in terms of noise reduction as to enable growth whilst fulfilling the restrictions on noise pollution. An open-section vertical wind tunnel with an anechoic test chamber has recently been constructed at the Delft University of Technology, in...

Uniform Gain Beamforming in 60 GHz Communications

Wireless data traffic is growing rapidly as the number of mobile devices increase and video contents become more popular. As 2.4\,GHz and 5\,GHz band communications only provide limited bandwidth, these frequency bands cannot support the demand of ultra-high data rate. Millimeter-wave (mmWave) communications promise massive available bandwidth...

Beamforming for novel matrix arrays: Fresnel Zone Beamforming and Stolt Migration

Currently a lot of effort is put into developing matrix arrays which allow for volumetric imaging and new applications. There are however multiple problems. Compared to arrays currently in use which have in the order of 128 elements, matrix arrays can easily contain 1000 to 10000 elements. If all elements would be connected independently, the...

Assessing the Effects of Deafness on Cortical Activity Peaks in the Developing Human Auditory System Measured by an EEG Neuroimaging Method

Bilateral cochlear implants (CIs) can restore hearing in deaf children, by electrically stimulating the auditory pathways. The effects of long-term deafness have been extensively studied and it is well known that deafness leads to cross-modal reorganization of the brain. However, the short term effects of CI use on the developing auditory...

Assessing noise level variability in fly-over data

As the air travel industry steadily grows, so does the noise pollution that comes with it. This brings with it a myriad of socio-economic consequences, especially in the vicinity of airports. In order to combat this aircraft noise at its origin, it is important to know where it originates from and determine the prevalent sound sources on an...

On Determining Smartphone Microphone Directivity with Application to Beamforming

An equiangular sampling scheme and accessory measurement set-up for determining the directivity gain pattern of a commercially available smartphone is presented. Determining this directivity gain pattern based on these measuremenents was not possible, because next to the impulse response of the microphone also the impulse response of the...

Sensor-Assisted Movement Identification and Prediction for Beamformed 60 GHz Links

The 60 GHz frequency band promises very high data rates { in the order of Gb/s { due to the availability of large amounts of bandwidth. High free- space path loss at the 60 GHz frequency band makes it necessary to employ beamforming capable directional antennas to confine signal power in the desired direction. When beamforming is used, the links...

Verbetering van verstaanbaarheid in teleconferenties door het gebruik van beamformen

De verstaanbaarheid van de aanwezigen bij teleconferenties is minder dan bij gesprekken waarbij beide partijen zich in \'e\'en ruimte bevinden, aangezien stoorsignalen net zo goed worden opgenomen en verder de ruimtelijke informatie van de spraak verloren gaat. Een systeem werd ontworpen dat real-time bepaalt uit welke richting iemand spreekt,...

Node Selection Technique for Distributed Beamforming in Green Cognitive Radio Networks

The wide deployment of wireless sensor nodes for varieties of applications calls the need for distributed beamforming as a cooperative scheme to efficiently use spectrum, to improve communication range and to save precious battery power during transmission. Given that there are a large set of cooperative cognitive radio users, ensuring the...

Noise reduction application for Android smartphones

Noise reduction application for Android smartphones using a beamforming algorithm. Acquiring microphone signals, designing a user interface and hardware connectivity.

Real-time Beamforming and Sound Classification Parameter Generation in Public Environments

Undesired, human behavior in public environments is an increasing issue in today’s society. The overload of security operators and law enforcement addresses the need for automatic detection of anomalous behavior. The EU-project ADABTS aims to facilitate the protection of EU citizens, property and infrastructure against threats of terrorism,...

60 GHz Beamforming Transmitter Design for Pulse Doppler Radar

Beamforming systems operating at millimeter-wave frequencies provide spatial selectivity, array gain and wide bandwidth, which benefit point-to-point Gb/s wireless communication network and high-resolution radar applications. In this thesis, a 60 GHz beamforming transmitter for a pulse Doppler radar is designed, which can be used for indoor...