Passive extended double-sided two-way ranging algorithm for UWB positioning

Horváth, Kristóf; Ill, Gergely; Milánkovich, Ákos

doi:10.1109/icufn.2017.7993831

Cited by 31 publications

(13 citation statements)

References 14 publications

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“…These methods were carefully chosen to reflect the general overview of the available TWR methods in the literature. The remaining TWR methods, derived mainly from the presented techniques, are: SDS-TWR with multiple acknowledgments [7], asynchronous double TWR (D-TWR) [8], burst-mode SDS-TWR [9], SDS-TWR with unequal reply-time method [10], TWR using estimated frequency offsets [11], parallel DS-TWR [12], and passive extended DS-TWR [13].…”

Section: State Of the Art For Twr Methods And Related Workmentioning

confidence: 99%

Numerical and Experimental Evaluation of Error Estimation for Two-Way Ranging Methods

Sang

Adams

Hörmann

et al. 2019

Sensors

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The Two-Way Ranging (TWR) method is commonly used for measuring the distance between two wireless transceiver nodes, especially when clock synchronization between the two nodes is not available. For modeling the time-of-flight (TOF) error between two wireless transceiver nodes in TWR, the existing error model, described in the IEEE 802.15.4-2011 standard, is solely based on clock drift. However, it is inadequate for in-depth comparative analysis between different TWR methods. In this paper, we propose a novel TOF Error Estimation Model (TEEM) for TWR methods. Using the proposed model, we evaluate the comparative analysis between different TWR methods. The analytical results were validated with both numerical simulation and experimental results. Moreover, we demonstrate the pitfalls of the symmetric double-sided TWR (SDS-TWR) method, which is the most highlighted TWR method in the literature because of its highly accurate performance on clock-drift error reduction when reply times are symmetric. We argue that alternative double-sided TWR (AltDS-TWR) outperforms SDS-TWR. The argument was verified with both numerical simulation and experimental evaluation results.

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Section: State Of the Art For Twr Methods And Related Workmentioning

confidence: 99%

Numerical and Experimental Evaluation of Error Estimation for Two-Way Ranging Methods

Sang

Adams

Hörmann

et al. 2019

Sensors

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“…Based on a recent work [17], where state-of-the-art TWR methods have been studied respecting their estimation performance, the AltDS-TWR method is most preferred in real-world scenarios due to its robustness against variation of reply-delay time and clock offsets. Interestingly, the alternative double-sided TWR with passive ranging (AltDS-TWR&PR) [18] method has been proposed recently as an improvement over the symmetric double-sided TWR with passive ranging (SDS-TWR&PR) [19] method, where the TOFs from a mobile node to several anchor nodes can be obtained simultaneously with a minimal number of packets over the air. However, the method requires that a ranging session can only be initiated by an anchor node and lacks flexibility in implementation for a variety of RTLS applications.…”

Section: Introductionmentioning

confidence: 99%

“…Step 8: Node M computesP M using Equations (18) and 20, node A computesP A using Equations (19) and 20, while each passive anchor node…”

mentioning

confidence: 99%

Multiple Simultaneous Ranging in IR-UWB Networks

Shah

Demeechai

2019

Sensors

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Growth in the applications of wireless devices and the need for seamless solutions to location-based services has motivated extensive research efforts to address wireless indoor localization networks. Existing works provide range-based localization using ultra-wideband technology, focusing on reducing the inaccuracy in range estimation due to clock offsets between different devices. This is generally achieved via signal message exchange between devices, which can lead to network congestion when the number of users is large. To address the problem of range estimation with limited signal messages, this paper proposes multiple simultaneous ranging methods based on a property of time difference of reception of two packets transmitted from different sources in impulse-radio ultra-wideband (IR-UWB) networks. The proposed method maintains similar robustness to the clock offsets while significantly reducing the air time occupancy when compared with the best existing ranging methods. Experimental evaluation of ranging in a line-of-sight environment shows that the proposed method enables accurate ranging with minimal air time occupancy.

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“…TDOA-based localization methods can reduce the number of message exchanges between nodes while completing ranging and localization [29][30][31][32]. A passive extended double-sided two-way ranging method is proposed in [33], which is a passive asynchronous localization strategy that uses extended two-way ranging to improve ranging accuracy. The proposed method requires fewer messages through indirect distance measurement by passive listening.…”

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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Passive extended double-sided two-way ranging algorithm for UWB positioning

Cited by 31 publications

References 14 publications

Numerical and Experimental Evaluation of Error Estimation for Two-Way Ranging Methods

Numerical and Experimental Evaluation of Error Estimation for Two-Way Ranging Methods

Multiple Simultaneous Ranging in IR-UWB Networks

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

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