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Tiberius, C.C.J.M. (author), Janssen, G.J.M. (author), Koelemeij, Jeroen (author), Dierikx, Erik (author), Diouf, C.E.V. (author), Dun, H. (author)This paper presents a terrestrial networked positioning system that obtains a reliable time reference from a national time scale realization and distributes it in a prototype to six roadside base stations through a fiber-optic Gigabit Ethernet network. Wireless wideband signals are transmitted by the base stations, thereby enabling...journal article 2023
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- Diouf, C.E.V. (author), Dun, H. (author), Janssen, G.J.M. (author), Dierikx, Erik (author), Koelemeij, Jeroen (author), Tiberius, C.C.J.M. (author) journal article 2022
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Tiberius, C.C.J.M. (author), van der Marel, H. (author), Reudink, R.H.C. (author), van Leijen, F.J. (author)This book provides an introduction, at academic level, into the field of surveying and mapping. The book has been compiled based on hand-outs and readers written for the third-year course Surveying and Mapping, in the bachelor program Civil Engineering at Delft University of Technology. This book covers a wide range of measurement techniques,...book 2022
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Koelemeij, Jeroen C.J. (author), Dun, H. (author), Diouf, C.E.V. (author), Dierikx, Erik F. (author), Janssen, G.J.M. (author), Tiberius, C.C.J.M. (author)Global navigation satellite systems (GNSS) are widely used for navigation and time distribution<sup>1–3</sup>, features that are indispensable for critical infrastructure such as mobile communication networks, as well as emerging technologies such as automated driving and sustainable energy grids<sup>3,4</sup>. Although GNSS can provide...journal article 2022
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Lăpădat, Alexandru M. (author), Tiberius, C.C.J.M. (author), Teunissen, P.J.G. (author)Smartphone accelerometers and low-cost Global Navigation Satellite System (GNSS) equipment have faced rapid and important advancement, opening a new door to deformation monitoring applications such as landslide, plate tectonics and structural health monitoring (SHM). The precision potential and operational feasibility of the equipment play an...journal article 2021
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Diouf, C.E.V. (author), Janssen, G.J.M. (author), Dun, H. (author), Kazaz, T. (author), Tiberius, C.C.J.M. (author)For validation and demonstration of high accuracy ranging and positioning algorithms and systems, a wideband radio signal generation and acquisition testbed, tightly synchronized in time and frequency, is needed. The development of such a testbed requires solutions to several challenges. Tight time and frequency synchronization, derived from...journal article 2021
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Dun, H. (author), Tiberius, C.C.J.M. (author), Diouf, C.E.V. (author), Janssen, G.J.M. (author)This paper presents a methodology to design a sparse multiband ranging signal with a large virtual bandwidth, from which time delay and carrier phase are estimated by a low complexity multivariate maximum likelihood (ML) method. In the estimation model for a multipath channel, not all reflected paths are considered, and time delay and carrier...journal article 2021
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Dun, H. (author), Tiberius, C.C.J.M. (author), Diouf, C.E.V. (author), Janssen, G.J.M. (author)Terrestrial positioning systems are being investigated as the complement to the global navigation satellite systems (GNSS), to provide precise and reliable positioning services in a GNSS-challenged environment. In this paper, we present the positioning performance of a ground-based positioning system, in which a multiband OFDM burst is used...conference paper 2021
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Dun, H. (author), Tiberius, C.C.J.M. (author), Diouf, C.E.V. (author), Janssen, G.J.M. (author)Time-based ranging accuracy is inversely proportional to the signal bandwidth. A larger the signal bandwidth leads to a higher accuracy of time delay estimation, but more complex hardware is needed. Alternatively, we explore the idea of using multiple narrow signal bands (e.g., 10 MHz of each) to create a large virtual signal bandwidth, which...conference paper 2020
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Zaminpardaz, S. (author), Teunissen, P.J.G. (author), Tiberius, C.C.J.M. (author)In this contribution, we propose a method for statistically evaluating the risk in a deformation monitoring system. When the structure under monitoring moves beyond tolerance, the monitor system should issue an alert. Only a very small probability is acceptable of the system telling us that no change beyond a critical threshold has taken...journal article 2020
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Teunissen, P.J.G. (author), Zaminpardaz, S. (author), Tiberius, C.C.J.M. (author)In safety-critical applications, deformation monitoring systems are required to issue timely alerts when a deformation beyond a critical threshold occurs. Only a very small probability of failing to issue an alert when in fact one should have been given, is acceptable. This probability is referred to as integrity risk. In this contribution,...journal article 2020
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Dun, H. (author), Tiberius, C.C.J.M. (author), Janssen, G.J.M. (author)In developing a high accuracy terrestrial radio navigation system, as a complement to a global navigation satellite system (GNSS), it is recognized that the performance of time delay estimation is proportional to, and thereby limited by, the signal bandwidth. Given a possibly narrow signal bandwidth, the central carrier phase can,...journal article 2020
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Pang, Menglin (author), Tiberius, C.C.J.M. (author)This paper presents an approach to analyse the quality, in terms of precision and reliability, of a system which integrates-at the observation-level-landmark positions and GNSS measurements, obtained with a single camera and a digital map, and a single frequency GNSS receiver respectively. We illustrate the analysis by means of design...journal article 2020
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Zaminpardaz, Safoora (author), Teunissen, P.J.G. (author), Tiberius, C.C.J.M. (author)The goal of this contribution is to assess the impact statistical model selection has on confidence levels of parameter estimators in linear(ized) GNSS models. In the processing of observational data, parameter estimation and statistical testing are often combined. A testing procedure is exercised to select the most likely observational model...conference paper 2020
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Diouf, C.E.V. (author), Dun, H. (author), Kazaz, T. (author), Janssen, G.J.M. (author), Tiberius, C.C.J.M. (author)Global Navigation Satellite Systems (GNSS) are nowadays the most common solutions used to cope with Positioning-Navigation Timing (PNT) applications demands. GNSS are relied on in very diverse contexts and domains, yet the interest in systems such as GPS, GALILEO and Beidou is continuously increasing. However, and in particular for safety...conference paper 2020
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Dun, H. (author), Tiberius, C.C.J.M. (author), Janssen, G.J.M. (author), Diouf, C.E.V. (author)The matched filter is the most common approach for time delay estimation and ranging in positioning systems. The accuracy is mainly determined by the signal bandwidth and multipath propagation condition. Instead of occupying an enormous signal bandwidth, aggregating multiple signal bands, which are transmitted either simultaneously or...conference paper 2019
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Zaminpardaz, S. (author), Teunissen, P.J.G. (author), Tiberius, C.C.J.M. (author)As parameter estimation and statistical testing are often intimately linked in the processing of observational data, the uncertainties involved in both estimation and testing need to be properly propagated into the final results produced. This necessitates the use of conditional distributions when evaluating the quality of the resulting...journal article 2019
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Imparato, D. (author), Teunissen, P.J.G. (author), Tiberius, C.C.J.M. (author)The Minimal Detectable Bias (MDB) is an important diagnostic tool in data quality control. The MDB is traditionally computed for the case of testing the null hypothesis against a single alternative hypothesis. In the actual practice of statistical testing and data quality control, however, multiple alternative hypotheses are considered. We...journal article 2018
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Dun, H. (author), Tiberius, C.C.J.M. (author), Janssen, G.J.M. (author)High accuracy terrestrial radio positioning systems, as a complement to a global navigation satellite system (GNSS), are attracting significant attention from academia and industry. This article investigates the feasibility of positioning based on carrier phase measurements of orthogonal frequency division multiplexing (OFDM) signals. Generally,...conference paper 2018
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Macarulla Rodriguez, Andrea (author), Tiberius, C.C.J.M. (author), van Bree, Roel (author), Geradts, Zeno (author)Google Location Timeline, once activated, allows to track devices and save their locations. This feature might be useful in the future as available data for evidence in investigations. For that, the court would be interested in the reliability of these data. The position is presented in the form of a pair of coordinates and a radius, hence...journal article 2018
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