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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
document
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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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
document
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
document
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
document
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
document
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)
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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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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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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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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