Terrestrial Precise Positioning System Using Carrier Phase from Burst Signals and Optically Distributed Time and Frequency Reference

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

doi:10.33012/2021.17846

Cited by 6 publications

(5 citation statements)

References 18 publications

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“…In this run, the receiver was installed on a car and operated in asynchronous mode. The carrier phase measurement model and additional results are presented in Dun et al (2021b).…”

Section: Tnps-prototype Resultsmentioning

confidence: 99%

“…An OFDM signal consists of a large number of closely spaced orthogonal sub-carriers arranged in parallel. As described by Dun et al (2021b), each transmitter transmits a burst-like signal packet for ranging that contains three training symbols as shown in Figure 11. The first two symbols are used (although one symbol would suffice in principle) for packet synchronization and channel estimation, in which a PRN sequence is QPSK-modulated on all available sub-carriers (i.e., the length of the sequence equals the number of sub-carriers used.)…”

Section: Ranging Signalmentioning

confidence: 99%

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

Tiberius

Janssen

Koelemeij

et al. 2023

navi

Self Cite

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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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“…In this run, the receiver was installed on a car and operated in asynchronous mode. The carrier phase measurement model and additional results are presented in Dun et al (2021b).…”

Section: Tnps-prototype Resultsmentioning

confidence: 99%

Section: Ranging Signalmentioning

confidence: 99%

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

Tiberius

Janssen

Koelemeij

et al. 2023

navi

Self Cite

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show abstract

“…The platform has been tested and validated through indoor ToA ranging experiments in a corridor located at the TU Delft campus. More experimental results using this testbed can be found in [37] and [38]. In [37], a ranging system based on the sparse selection of narrow signal bands is presented and validated using the testbed.…”

Section: Toa Ranging Experimentsmentioning

confidence: 99%

“…This work aims at increasing the bandwidth occupancy efficiency using a CRLB constrained convex optimization to select the frequency bands. In [38], a positioning system using carrier phase measurements is validated using the testbed.…”

Section: Toa Ranging Experimentsmentioning

confidence: 99%

Accurate Differentially Private Deep Learning on the Edge

Han

Ouyang

et al. 2021

IEEE Trans. Parallel Distrib. Syst.

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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 a centrally distributed time-frequency reference signal, needs to be maintained in the hardware of the transmitter and receiver nodes, and wideband signal acquisition requires sustainable data throughput between the receiver and host PC as well as data storage at GB level. This article presents a testbed for wideband radio signal acquisition, for validation and demonstration of high accuracy ranging and positioning. It consists of multiple Ettus X310 universal software radio peripherals (USRPs) and supports high accuracy (<100 ps) time-deterministic, sustainable signal transmission and acquisition, with a bandwidth up to 320 MHz (in dual channel mode) and frequencies up to 6 GHz. Generation and processing of wideband arbitrary signal waveforms is done offline. To realize these features, radio frequency on chip (RFNoC) compatible HDL units were developed for integration in the X310 SDR platform. Wideband transmission and signal acquisition at a lower duty cycle is applied to reduce the data offloading throughput to the host's personal computer (PC). Benchmarking of the platform was performed to demonstrate sustainable long duration dual channel acquisition. Indoor range measurements with the synchronous operation of the testbed show a decimeter-level accuracy.

show abstract

“…The platform has been tested and validated through indoor ToA ranging experiments in a corridor located at the TU Delft campus. More experimental results using this testbed can be found in [37] and [38]. In [37], a ranging system based on sparse selection of narrow signal bands is presented and validated using the testbed.…”

Section: Toa Ranging Experimentsmentioning

confidence: 99%

A USRP-Based Testbed for Wideband Ranging and Positioning Signal Acquisition

Diouf

Janssen

Dun

et al. 2021

IEEE Trans. Instrum. Meas.

Self Cite

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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 a centrally distributed timefrequency reference signal, needs to be maintained in the hardware of the transmitter and receiver nodes, and wideband signal acquisition requires sustainable data throughput between receiver and host PC as well as data storage at GB level.This paper presents a testbed for wideband radio signal acquisition, for validation and demonstration of high accuracy ranging and positioning. It consists of multiple Ettus X310 USRPs and supports high accuracy (<100 ps) time-deterministic, sustainable signal transmission and acquisition, with a bandwidth up to 320 MHz (in dual channel mode) and frequencies up to 6 GHz. Generation and processing of wideband arbitrary signal waveforms, is done offline. To realize these features, RFNoC compatible HDL units were developed for integration in the X310 SDR platform. Wideband transmission and signal acquisition at a lower duty cycle is applied to reduce the data offloading throughput to the host PC. Benchmarking of the platform was performed to demonstrate sustainable long duration dual channel acquisition. Indoor range measurements with synchronous operation of the testbed show a decimeter-level accuracy.

show abstract

Terrestrial Precise Positioning System Using Carrier Phase from Burst Signals and Optically Distributed Time and Frequency Reference

Cited by 6 publications

References 18 publications

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

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

Accurate Differentially Private Deep Learning on the Edge

A USRP-Based Testbed for Wideband Ranging and Positioning Signal Acquisition

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