High accuracy location estimation for a Mobile Tag using one-way UWB signaling

Saad, Mohamed; Bleakley, Chris J.; Walsh, Michael; Ye, Tingcong

doi:10.1109/upinlbs.2012.6409769

Cited by 12 publications

(3 citation statements)

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“…Four base stations, the coordinates of which were known, were set at the four corners of the ceiling in the test space, which means that the activity range of all test points was below the height of the base stations, and their planar coordinate activity range was limited. The coordinates were as follows: A1(1, 1, 3), A2(1, 13, 3), A3 (13,13,3), and A4(13, 1, 3). Fifteen test points were randomly generated in the test space.…”

Section: Experiments 41 Multitest Point-positioning Simulationmentioning

confidence: 99%

“…While, GNSS can provide accurate three-dimensional (3D) positions in outdoor environments, UWB positioning is considered a reliable positioning method in indoor environments due to its high ranging accuracy. With the development of two-way ranging (TWR) technology, UWB positioning can achieve centimeter-scale ranging with unsynchronized clocks between stations [1][2][3]. Many researchers have built indoor positioning systems based on UWB technology, which can achieve centimeter-level positioning accuracy.…”

Section: Introductionmentioning

confidence: 99%

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An Indoor UWB 3D Positioning Method for Coplanar Base Stations

Zhou

et al. 2022

Sensors

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As an indispensable type of information, location data are used in various industries. Ultrawideband (UWB) technology has been used for indoor location estimation due to its excellent ranging performance. However, the accuracy of the location estimation results is heavily affected by the deployment of base stations; in particular, the base station deployment space is limited in certain scenarios. In underground mines, base stations must be placed on the roof to ensure signal coverage, which is almost coplanar in nature. Existing indoor positioning solutions suffer from both difficulties in the correct convergence of results and poor positioning accuracy under coplanar base-station conditions. To correctly estimate position in coplanar base-station scenarios, this paper proposes a novel iterative method. Based on the Newton iteration method, a selection range for the initial value and iterative convergence control conditions were derived to improve the convergence performance of the algorithm. In this paper, we mathematically analyze the impact of the localization solution for coplanar base stations and derive the expression for the localization accuracy performance. The proposed method demonstrated a positioning accuracy of 5 cm in the experimental campaign for the comparative analysis, with the multi-epoch observation results being stable within 10 cm. Furthermore, it was found that, when base stations are coplanar, the test point accuracy can be improved by an average of 63.54% compared to the conventional positioning algorithm. In the base-station coplanar deployment scenario, the upper bound of the CDF convergence in the proposed method outperformed the conventional positioning algorithm by about 30%.

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Section: Experiments 41 Multitest Point-positioning Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Indoor UWB 3D Positioning Method for Coplanar Base Stations

Zhou

et al. 2022

Sensors

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“…Introduction: Time-of-arrival (TOA) is an important ranging and positioning technology for indoor localisation applications and internet of things [1]. Over the past few decades, there have been numerous studies about examining TOA-based techniques in radar systems, impulse radio UWB systems [2], acoustic positioning systems [3], and visible localisation communication systems [4]. Compared with other ranging technologies, such as receive-signal-strength approach and round time of flight estimation, TOA estimation technology usually exhibits better performance in terms of ranging accuracy, instantaneity, and expandability and has been researched extensively for a long time.…”

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confidence: 99%

Time‐of‐arrival estimation for smartphones based on built‐in microphone sensor

Liu

Chen

et al. 2020

Electron. lett.

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The time‐of‐arrival (TOA) estimation method is an important ranging and positioning technology for indoor localisation and navigation. In this Letter, a novel TOA estimation method for smartphones based on a built‐in microphone sensor is proposed, which utilises the propagation delay between optical and acoustic signals to achieve distance estimation. Unlike other TOA estimation technologies based on multi‐sensors, a single MEMS microphone of a smartphone is used as the receiving sensor for both optical and acoustic signals, which is beneficial for eliminating the synchronisation error and improving ranging precision. Experimental results demonstrate that the proposed TOA estimation method is effective and accurate with an average ranging error of <0.29 m under a signal‐to‐noise ratio (SNR) of 1.18 dB for the smartphones tested in this work.

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