S-TDoA — Sequential time difference of arrival — A scalable and synchronization free approach forl Positioning

Pelka, Mathias; Hellbrück, Horst

doi:10.1109/wcnc.2016.7565024

Cited by 24 publications

(11 citation statements)

References 10 publications

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“…Technique Architecture Accuracy(2D) Feature [18] sequential-TDOA Tiny TriSOS 1 m Low precision, low cost, no limit on the number of blind nodes.No need global clock synchronization, but no clock drift compensation. [25] TDOA…”

Section: Refmentioning

confidence: 99%

“…J. X. Lee, et al [17] proposed a new method that does not require the time synchronization initially and can realize sub-meters ranging error. The Sequential-TDOA method in [18] is proposed to reduce the requirement of time synchronization, but the clock drift is not considered and the positioning accuracy is nearly 1 m. In [19], the clock offset is estimated by symmetrical doublesided two way ranging (SDS-TWR) but used as a constant value. TWR, also called Round Trip Time (RTT) [20], can avoid the time synchronization issue effectively with twoway communication between anchor nodes and blind nodes.…”

Section: Introductionmentioning

confidence: 99%

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Design and Implementation of Synchronization-free TDOA Localization System Based on UWB

Wang¹,

Huang²,

Cai³

et al. 2019

RADIOENGINEERING

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At present, indoor localization system based on ultra-wideband (UWB) has attracted more and more attention. In UWB system, Time Difference of Arrival (TDOA) and Two-Way Ranging (TWR) are widely used. However, TDOA requires high-accuracy time synchronization between all anchor nodes and even slight noise can cause large localization error. In TWR, although two-way communication between anchor nodes with known location and blind nodes to be located can avoid the time synchronization issue effectively, the clock drift and the number of blind nodes will affect the system performance. To overcome these problems, a new synchronization-free TDOA location algorithm is proposed. Firstly,the clock model is established and the influence of antenna delay is considered. Then, the system signal exchange mechanism and localization model are proposed. In the system, the blind nodes just receive the ranging signals from anchor nodes so that the system has no limit on the number of blind nodes. Finally,the major factor affecting the accuracy of ranging -clock drift, is discussed, and then a clock frequency offset compensation algorithm is proposed. The indoor localization experiment results show that the indoor localization system designed in this paper can achieve 3-D localization.

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Section: Refmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design and Implementation of Synchronization-free TDOA Localization System Based on UWB

Wang¹,

Huang²,

Cai³

et al. 2019

RADIOENGINEERING

View full text Add to dashboard Cite

show abstract

“…The second group of possible approaches is based on a certain degree of cooperation between the target and the positioning system sensors. This group includes, for example, the sequential TDOA method [ 19 ]. However, this cooperation can be a major limitation, especially for military applications.…”

Section: Introductionmentioning

confidence: 99%

Radar Position Estimation by Sequential Irradiation of ESM Receivers

Hubacek

Veselý

Olivová

2021

Sensors

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In this article, a new technique for determination of 2D signal source (target) position is proposed. This novel approach, called the Inscribed Angle (InA), is based on measuring the time difference of sequential irradiation by the main beam of the target antenna’s radiation pattern, using Electronic Support Measures (ESM) receivers, assuming that the target antenna is rotating and that its angular velocity is constant. In addition, it is also assumed that the localization system operates in a LOS (Line of Sight) situation and that three time-synchronized sensors are placed arbitrarily across the area. The main contribution of the article is a complete description of the proposed localization method. That is, this paper demonstrates a geometric representation and an InA localization technique model. Analysis of the method’s accuracy is also demonstrated. The time of irradiation of the receiving station corresponds to the direction in which the maximum received signal strength (RSS) was measured. In order to achieve a certain degree of accuracy of the proposed positioning technique, a method was derived to increase the accuracy of the irradiation time estimation. Finally, extensive simulation was conducted to demonstrate the performance and accuracy of our positioning method.

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“…The proposed method requires fewer messages through indirect distance measurement by passive listening. Sequential TDOA is proposed in [34], where the anchors are triggered sequentially to send periodic signals. This approach supports an unlimited number of agents as well as high update rates, and it enhances covertness because agents are not "visible" as they do not send signals.…”

Section: Introductionmentioning

confidence: 99%

An Efficient Single-Anchor Localization Method Using Ultra-Wide Bandwidth Systems

2019

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Ultra-wideband technology has the merits of high temporal resolution and stability, and it has been widely used for high-accuracy localization and tracking. However, most ultra-wideband localization systems need multiple anchors for trilateration, which results in high system cost, large messages overhead, and insufficient extraction of information. In this paper, we propose a single-anchor localization (SAL) mehtod that achieves high-accuracy multi-agent localization with high efficiency. In the proposed method, the anchor broadcasts the first two messages and then each agent responds one message to the anchor (quasi-)simultaneously. Based on the received message with superpositioned agent responses, the time-of-flight and angle-of-arrival information from all agents to the anchor can be extracted altogether. We implement the localization system in two indoor environments, and show that the proposed method can achieve decimeter-level accuracy for multiple agents using three messages. Our method provides design guidelines for high-accuracy and high-efficiency multi-agent localization systems.

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S-TDoA — Sequential time difference of arrival — A scalable and synchronization free approach forl Positioning

Cited by 24 publications

References 10 publications

Design and Implementation of Synchronization-free TDOA Localization System Based on UWB

Design and Implementation of Synchronization-free TDOA Localization System Based on UWB

Radar Position Estimation by Sequential Irradiation of ESM Receivers

An Efficient Single-Anchor Localization Method Using Ultra-Wide Bandwidth Systems

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