A new transmission scheme for wireless synchronization and clock errors reduction in UWB positioning system

Djaja-Jośko, Vitomir; Kołakowski, Jerzy

doi:10.1109/ipin.2016.7743635

Cited by 18 publications

(15 citation statements)

References 9 publications

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“…here as the capabilities of the Nodes we rename to include the capabilities we rename from. Now the setup exactly resembles the DJKM method [5]. In addition, our complete DPP setup calculates the same TDoA information as DJKM (comp.…”

Section: A Relation To Other Tdoa Methodsmentioning

confidence: 99%

“…1) More Flexible Positioning of a Passive Node: Until DPP the only method which could be used to position a Passive Node was DJKM. To generate TDoA-values for a Passive Node, DJKM requires an infrastructure of Bilateral Nodes [5]. DPP allows in such cases for other, more flexible device roles in the infrastructure.…”

Section: New Casesmentioning

confidence: 99%

“…To describe the ordering, we consider our set of Anchors as an ordered list. a) First Round: In the first round, as described in [5] each Anchor performs communication with its successor in the list. This process starts with the first Anchor in the list and ends with the last one.…”

Section: E Improved Performancementioning

confidence: 99%

“…Again, this measurement comes at no additional performance cost as the same signals get used for TWR, DPW, and direct values at the same time. While the authors of DJKM mention that their System does measure ToA values between the Anchors, this does only work for certain pairs of Anchors [5]. It also does not work for Tag-Nodes with the role active or bilateral.…”

Section: E Improved Performancementioning

confidence: 99%

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A Generalized TDoA/ToA Model for ToF Positioning

Tschirschnitz

Wagner

Pahl

et al. 2019

2019 International Conference on Indoor Positioning and Indoor Navigation (IPIN)

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Many applications require positioning. Time of Flight (ToF) methods calculate distances by measuring the propagation time of signals. We present a novel ToF localization method. Our new approach works infrastructure-less, without pre-defined roles like Anchors or Tags. It generalizes existing synchronization-less Time Difference of Arrival (TDoA) and Time of Arrival (ToA) algorithms. We show how known algorithms can be derived from our new method. A major advantage of our approach is that it provides a comparable or better clock error robustness, i.e. the typical errors of crystal oscillators have negligible impact for TDoA and ToA measurements. We show that our channel usage is for most cases superior compared to the state-of-the art.

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Section: A Relation To Other Tdoa Methodsmentioning

confidence: 99%

Section: New Casesmentioning

confidence: 99%

Section: E Improved Performancementioning

confidence: 99%

Section: E Improved Performancementioning

confidence: 99%

See 2 more Smart Citations

A Generalized TDoA/ToA Model for ToF Positioning

Tschirschnitz

Wagner

Pahl

et al. 2019

2019 International Conference on Indoor Positioning and Indoor Navigation (IPIN)

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“…A method combining the benefits of SDS-TWR and Whistle was proposed by Djaja-Josko and Kolakowski [7], and therefore we refer to it as Djaja-Josko-Kolakowski-Method (DJKM).…”

Section: Djaja-josko-kolakowski Methodsmentioning

confidence: 99%

Clock Error Analysis of Common Time of Flight based Positioning Methods

Tschirschnitz

Wagner

Pahl

et al. 2019

2019 International Conference on Indoor Positioning and Indoor Navigation (IPIN)

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Today, many applications such as production or rescue settings rely on highly accurate entity positioning. Advanced Time of Flight (ToF) based positioning methods provide highaccuracy localization of entities. A key challenge for ToF based positioning is to synchronize the clocks between the participating entities. This paper summarizes and analyzes ToA and TDoA methods with respect to clock error robustness. The focus is on synchronization-less methods, i.e. methods which reduce the infrastructure requirement significantly. We introduce a unified notation to survey and compare the relevant work from literature. Then we apply a clock error model and compute worst case location-accuracy errors. Our analysis reveals a superior error robustness against clock errors for so called Double-Pulse methods when applied to radio based ToF positioning.

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Bias and variance of asymmetric double‐sided two‐way ranging

Navrátil

Vejrazka

2019

NAVIGATION

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Asymmetric double-sided two-way ranging (ADS-TWR) is a method of range estimation through precisely time-stamped messages sent between two transceivers. In contrast to symmetric double-sided two-way ranging (SDS-TWR), ADS-TWR suppresses the errors induced by transceiver clock drifts even when the message reply delays are unequal. However, due to the nonlinearity of the ADS-TWR estimator, its mean and variance cannot be evaluated in a straightforward or exact way. This article presents an analytical approach of evaluating an approximation of bias and variance of the range estimators and applies it on an exemplary set of parameters, typical for ultra-wide band (UWB) localization systems. Moreover, the obtained results are verified by a Monte Carlo simulation. It will be proven that ADS-TWR is safe to be used in most of the present applications, and its precision is rather similar to SDS-TWR.NAVIGATION. 2019;66:593-602.wileyonlinelibrary.com/journal/navi

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A new transmission scheme for wireless synchronization and clock errors reduction in UWB positioning system

Cited by 18 publications

References 9 publications

A Generalized TDoA/ToA Model for ToF Positioning

A Generalized TDoA/ToA Model for ToF Positioning

Clock Error Analysis of Common Time of Flight based Positioning Methods

Bias and variance of asymmetric double‐sided two‐way ranging

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