Accurate Multi-Zone UWB TDOA Localization utilizing Cascaded Wireless Clock Synchronization

Friedrich, Johannes; Tiemann, Janis; Wietfeld, Christian

doi:10.1109/ipin51156.2021.9662537

Cited by 11 publications

(3 citation statements)

References 20 publications

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“…However, the positioning rate decreases when there are many anchors in a large building. A multi-hop wireless synchronization algorithm was proposed in [ 35 ], where the synchronization signal from the master anchor propagates between anchors according to the synchronization quality treemap, reducing the synchronization error caused by NLOS in a building. However, line-of-sight (LOS) anchor pairs may not always be present between adjacent rooms, and a viable path may not be included in the treemap.…”

Section: Related Workmentioning

confidence: 99%

Range-Extension Algorithms and Strategies for TDOA Ultra-Wideband Positioning System

Huang

Chen

Wei

et al. 2023

Sensors

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The Internet of Things (IoT) for smart industry requires the surveillance and management of people and objects. The ultra-wideband positioning system is an attractive solution for achieving centimeter-level accuracy in target location. While many studies have focused on improving the accuracy of the anchor coverage range, it is important to note that in practical applications, positioning areas are often limited and obstructed by furniture, shelves, pillars, or walls, which can restrict the placement of anchors. Furthermore, some positioning regions are located beyond anchor coverage, and a single group with few anchors may not be able to cover all rooms and aisles on a floor due to non-line-of-sight errors causing severe positioning errors. In this work, we propose a dynamic-reference anchor time difference of arrival (TDOA) compensation algorithm to enhance accuracy beyond anchor coverage by eliminating local minima of the TDOA loss function near anchors. We designed a multidimensional and multigroup TDOA positioning system with the aim of broadening the coverage of indoor positioning and accommodating complex indoor environments. By employing an address-filter technique and group-switching process, tags can seamlessly move between groups with a high positioning rate, low latency, and high accuracy. We deployed the system in a medical center to locate and manage researchers with infectious medical waste, demonstrating its usefulness for practical healthcare institutions. Our proposed positioning system can thus facilitate precise and wide-range indoor and outdoor wireless localization.

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Section: Related Workmentioning

confidence: 99%

Range-Extension Algorithms and Strategies for TDOA Ultra-Wideband Positioning System

Huang

Chen

Wei

et al. 2023

Sensors

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“…The BLAS system performs well in MAS with many agents, according to experiments and simulations. [19] proposed exact multi-hop wireless clock synchronization and localization zone selection. Test findings reveal that positioning accuracy in complex settings with many spaces is higher than existing methodologies.…”

Section: Related Workmentioning

confidence: 99%

CWCS: Cascaded Wireless Clock Synchronization Scheme for Ultra-Wideband based Positioning Networks

ZHANG¹

2023

Preprint

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<p>Ultra-wideband (UWB)-based positioning is essential in industrial and public spaces, and knowing our location influences many of our key decisions. Precise clock synchronization between anchors is necessary for large-scale localization systems. So the approaches designed for a small-scale and simple lab scenario are inappropriate. In this paper, a cascaded wireless clock synchronization (CWCS) method is suggested as a solution to address these problems. The wireless clock synchronization (WCS) algorithm is initially introduced, followed by a description of the CWCS scheme for multiple master anchors and a discussion of the clock calibration packet (CCP) transmission control algorithm. The experimental findings show that the CWCS scheme performs well in UWB-based positioning networks.</p>

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“…Receivers (base stations), which measure the direction of arrival (angle of incidence of radio waves) of the received signal on the transmission path from the mobile station to more than two base stations through an array of antennas, use direction-based positioning techniques, such as angle of arrival (AOA: angle of arrival) positioning techniques, to determine their locations [ 10 , 11 ]. Distance-based positioning methods such as time difference of arrival (TDOA, time difference of arrival) positioning technology, which uses base stations to detect the time difference between the signal and the mobile station to transmit the signal, can be used to determine a hyperbola [ 12 ]. At least three base stations are required in order to locate the mobile station, although more are possible.…”

Section: Introductionmentioning

confidence: 99%

Bio-Inspired Swarm Intelligence Optimization Algorithm-Aided Hybrid TDOA/AOA-Based Localization

Cao

Chen

et al. 2023

Biomimetics

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A TDOA/AOA hybrid location algorithm based on the crow search algorithm optimized by particle swarm optimization is proposed to address the challenge of solving the nonlinear equation of time of arrival (TDOA/AOA) location in the non-line-of-sight (NLoS) environment. This algorithm keeps its optimization mechanism on the basis of enhancing the performance of the original algorithm. To obtain a better fitness value throughout the optimization process and increase the algorithm’s optimization accuracy, the fitness function based on maximum likelihood estimation is modified. In order to speed up algorithm convergence and decrease needless global search without compromising population diversity, an initial solution is simultaneously added to the starting population location. Simulation findings demonstrate that the suggested method outperforms the TDOA/AOA algorithm and other comparable algorithms, including Taylor, Chan, PSO, CPSO, and basic CSA algorithms. The approach performs well in terms of robustness, convergence speed, and node positioning accuracy.

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Accurate Multi-Zone UWB TDOA Localization utilizing Cascaded Wireless Clock Synchronization

Cited by 11 publications

References 20 publications

Range-Extension Algorithms and Strategies for TDOA Ultra-Wideband Positioning System

Range-Extension Algorithms and Strategies for TDOA Ultra-Wideband Positioning System

CWCS: Cascaded Wireless Clock Synchronization Scheme for Ultra-Wideband based Positioning Networks

Bio-Inspired Swarm Intelligence Optimization Algorithm-Aided Hybrid TDOA/AOA-Based Localization

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