Time Delay Estimation Based on Multi-band Multi-carrier Signal in Multipath Environments

Dun, Han; Tiberius, C.C.J.M.; Janssen, G. C. A. M.; Diouf, Cherif

doi:10.33012/2019.16958

Cited by 5 publications

(7 citation statements)

References 12 publications

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“…Instead of occupying the entire available signal bandwidth, in [3] we explored the idea of using multiple signal bands that are sparsely located within the available signal spectrum, to create a large virtual signal bandwidth, which has been referred to as a sparse multiband signal. As a follow-up, in this paper, we focus on the signal design, specifically on how to sparsely select multiple signal bands from the available signal spectrum, such that we occupy little total spectrum bandwidth, and can still achieve a favorable ranging accuracy.…”

Section: Introductionmentioning

confidence: 99%

Sparse Signal Bands Selection for Precise Time-based Ranging in Terrestrial Positioning

Dun

Tiberius

Diouf

et al. 2020

2020 IEEE/ION Position, Location and Navigation Symposium (PLANS)

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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 maintains the spectral efficiency but largely improves the ranging accuracy. Considering the impact of multipath, the propagation delay of the LoS path is computed from the estimated channel impulse response (CIR). In this paper, we propose an approach to sparsely select signal bands for ranging and positioning based on convex optimization. The Cramér-Rao lower bound (CRLB) for the propagation delay and gain estimators, as a performance criterion, is employed in the constraint of the optimization. The CRLB is derived in a two-path channel, so that the accuracy and the correlation between the LoS path and the reflection are taken into account. Experiments are conducted in a laboratory environment to illustrate the proposed signal design methodology dedicated for ranging with a sub-decimeter accuracy.

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Section: Introductionmentioning

confidence: 99%

Sparse Signal Bands Selection for Precise Time-based Ranging in Terrestrial Positioning

Dun

Tiberius

Diouf

et al. 2020

2020 IEEE/ION Position, Location and Navigation Symposium (PLANS)

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“…This approach will facilitate (to a large extent) the high time resolution offered by this wide bandwidth while occupying only a fraction of the entire wide band. This approach was discussed previously in Dun et al (2019) and Kazaz et al (2021). Similarly, spectral resources are needed only for a fraction of the time.…”

Section: Wideband Radiomentioning

confidence: 99%

“…Aspects of this research project have been published previously, including presentations at several of ION conferences (Dun et al, 2019); (Diouf et al, 2020). The full concept of the system together with positioning results obtained with the prototype were also published previously (Koelemeij et al, 2022).…”

Section: Earlier Workmentioning

confidence: 99%

Decimeter Positioning in an Urban Environment Through a Scalable Optical-Wireless Network

Tiberius

Janssen

Koelemeij

et al. 2023

navi

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While global positioning systems (GPSs) play a significant role in modern life, they are far from perfect. GPSs and global navigation satellite systems (GNSSs) in general are critical assets for three-dimensional positioning, navigation, and timing (PNT) worldwide. GPSs have built a remarkable track-record since their inception, meeting set performance standards and achieving impressive up-times. GPSs have become a very popular PNT sensors in a large variety of applications, including vital functions such as sustainable energy grids, telecommunication networks, and electronic banking and trading, as well as aviation, logistics and transportation, and unmanned vehicle applications. However, GPSs have several shortcomings and vulnerabilities. Typically, GPSs perform worst where they are needed most, i.e., in densely-built urban areas. In these areas, satellite signals are frequently blocked by objects that are abundantly present in these environments. This may lead to a denial of its PNT functionality. Also, signals are frequently reflected by these objects; these detoured signals are received instead of or immediately adjacent to direct line-of-sight (LoS) signals, thereby degrading its PNT performance. In addition, several authorities have expressed increasing concern about the reliance of

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“…When both channels are associated, a contiguous 320 MHz bandwidth can be obtained. Using sub-band techniques an even higher transmitting and receiving virtual bandwidth can be achieved [7]. In that way, a ranging system can be implemented which to a very large extent is resilient to multipath.…”

Section: C) Sdr Based Pseudolites and Receiver Unitsmentioning

confidence: 99%

Demonstration of a Decimeter-level Accurate Hybrid Optical-wireless Terrestrial Positioning System

Diouf¹,

Dun²,

Kazaz³

et al. 2020

Proceedings of the 33rd International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GNSS+ 202

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BIOGRAPHIES Cherif Diouf received a PhD degree in system modeling of electronic circuits from the Université de Bretagne Occidentale (France) in 2014. He later carried out research on optical communication and seabed power-over-fiber systems. More recently, he was an embedded systems engineer on deep-sea autonomous floats at the French oceanographic institute. He is currently working in the department of Geoscience and Remote Sensing, Delft University of Technology on the development of an accurate optical-wireless terrestrial positioning system demonstrator.

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Time Delay Estimation Based on Multi-band Multi-carrier Signal in Multipath Environments

Cited by 5 publications

References 12 publications

Sparse Signal Bands Selection for Precise Time-based Ranging in Terrestrial Positioning

Sparse Signal Bands Selection for Precise Time-based Ranging in Terrestrial Positioning

Decimeter Positioning in an Urban Environment Through a Scalable Optical-Wireless Network

Demonstration of a Decimeter-level Accurate Hybrid Optical-wireless Terrestrial Positioning System

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