Constructing a sub-nanosecond time synchronization network using White Rabbit: Proof-of-concept study on a distributed White Rabbit Switch

Highly accurate time sources, such as Cesium-based or GPS clocks, are the best candidates to provide a correct notion of time, but are too costly and impractical for implementation in every modern digital device. Ubiquitously, (crystal) oscillators are employed instead. To maintain a shared notion of time, the offsets and drift/jitter have to be...

Joint Method of Moments (JMoM) and Successive Moment Cancellation (SMC) Multiuser Time Synchronization for ZP-OFDM-Based Waveforms Applicable to Joint Communication and Sensing

It has been recently shown that zero padding (ZP)-orthogonal frequency-division multiplexing (OFDM) is a promising candidate for 6G wireless systems requiring joint communication and sensing. In this paper, we consider a multiuser uplink scenario where users are separated in power domain, i.e., non-orthogonal multiple access (NOMA), and use...

In-band Time Synchronization in Real-Time systems

Real-time (RT) systems are widespread over different industries, e.g., healthcare, robotics, manufacturing, machine vision, etc. These systems consist of a hardware and software part that execute an RT application. These systems require a bounded and predictable time response on incoming events and execute all input and output (IO) tasks...

Time Synchronization for Anchorless Satellite Networks

In this thesis, we propose a new class of pairwise frequency, multi-domain time synchronization and ranging algorithms for anchorless mobile networks of asynchronous nodes. We apply these techniques and study network and mission level aspects of time synchronization to Orbiting Low Frequency Array for Radio astronomy (OLFAR), a proposed...

On vectorial integer bootstrapping implementations in the estimation of satellite orbits and clocks based on small global networks

The estimation of satellite orbits and clocks plays a central role in different Global Navigation Satellite System (GNSS) domains, e.g. precise positioning or time transfer. Such products can be computed in the process of Orbit Determination and Time Synchronization (ODTS), which relies on a network of ground-based stations, well distributed...

Developing interactions, disentangling contradictions: Examining paradoxes of inter-organisational relations in constructing collaborations

The positive nature of partnering to resolve adversarial relationships in the construction industry is well-rehearsed. However, critics have argued that espoused benefits of partnering have not materialised because business-as-usual prevails. Furthermore, some scholars insist that more needs to be done to analyse the practices of partnering by...