Ultrawideband-Based 3-D Localization Using Compact Base-Station Configurations

Bharadwaj, Richa; Parini, C.G.; Alomainy, Akram

doi:10.1109/lawp.2014.2301636

Cited by 20 publications

(19 citation statements)

References 10 publications

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“…The four base stations (BS) with BS1 as reference zero coordinate ) are positioned near the vertices of the cuboid in an area of 1.8  1.8 m 2 to obtain high accuracy positioning in three dimensions [23].…”

Section: Measurement Set-upmentioning

confidence: 99%

“…The time of arrival (TOA) positioning techniques are used due to the fine time resolution/high bandwidth of the UWB signal [23][24][25]. Figure 2 shows the proposed localisation algorithm [16] for dealing with multipath and non-line of sight NLOS situations mainly developed for human body localisation and limb movement tracking.…”

Section: Body-worn Antenna Localisation Techniquesmentioning

confidence: 99%

“…Localisation accuracy depending on number of BS has also been explored leading to the conclusion that 8 BS can give slightly better accuracy in comparison to 4 BS but can increase the installation complexity, cost and time. Three BS will be able to provide 2D localisation and if used in L shape configuration [23] can obtain 3D localisation with some deterioration in the accuracy (1 to 2 cm). Two BSs will not be able to give 2D or 3D localisation as it will be a limitation for the trilateration algorithm.…”

Section: E Kurtosis Limbs Localisationmentioning

confidence: 99%

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Impulse Radio Ultra-Wideband Communications for Localization and Tracking of Human Body and Limbs Movement for Healthcare Applications

Bharadwaj

Swaisaenyakorn

Parini

et al. 2017

IEEE Trans. Antennas Propagat.

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Abstract-Accurate and precise motion tracking of limbs and human subjects has technological importance in various healthcare applications. The use of Impulse Radio Ultra Wideband (UWB) technology due its inherent properties is of recent interest for high accuracy localisation. This paper presents experimental investigations and analysis of indoor human body localisation and tracking of limb movements in 3D based on IR-UWB technology using compact and cost-effective body worn antennas. The body-centric wireless channel characterisation has been analysed in detail using parameters such as path loss magnitude, number of multipath components, RMS delay spread, signal amplitude and Kurtosis with the main focus to differentiate between line-of-sight (LOS) and non-line-of-sight (NLOS) situations. Fidelity of the received signal is also calculated for different activities and antenna positions to study the pulse preserving nature of the UWB antenna when it is placed on the human body. The results reported in this paper have high localisation accuracy with 90 % in the range of 0.5 to 2.5 cm using simple and cost-effective techniques which is comparable to the results obtained by the standard optical motion capture system.

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Section: Measurement Set-upmentioning

confidence: 99%

Section: Body-worn Antenna Localisation Techniquesmentioning

confidence: 99%

Section: E Kurtosis Limbs Localisationmentioning

confidence: 99%

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Impulse Radio Ultra-Wideband Communications for Localization and Tracking of Human Body and Limbs Movement for Healthcare Applications

Bharadwaj

Swaisaenyakorn

Parini

et al. 2017

IEEE Trans. Antennas Propagat.

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“…The subject was made to stand the 1.8 by 1.8 m 2 area. The four base stations are positioned near the vertices of the cuboid to obtain high accuracy positioning in three dimensions [2,9]. The antenna a considered as zero co-ordinate ሺ ‫ݔ‬ , ‫ݕ‬ , reference to find the position of the target placed inside the volume of the cube.…”

Section: IImentioning

confidence: 99%

“…An Inverse Fast Fourier Transform (IFFT) is then applied to obtain the impulse response of the measured channels (CIR). The channel impulse response [9,10] is given by:…”

Section: A Time Of Arrival Estimationmentioning

confidence: 99%

Motion Tracking of a Human Subject in Healthcare Applications Using Compact Ultra Wideband Antennas

Bharadwaj¹,

Swaisaenyakorn²,

Parini³

et al. 2014

Proceedings of the 4th International Conference on Wireless Mobile Communication and Healthcare - "Transforming Healthcare Thro

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This paper presents a study of 3D localisation of compact body-worn sensors using Ultra Wideband technology. Nine different sensor locations on the upper body of the human subject are considered. 3D localisation of the body worn sensors is achieved using time of arrival and peak detection techniques. The average 3D positioning accuracy achieved is in the range of 1 to 3 cm which are comparable with the complex optical motion capture system that is used as reference. Results also show that accuracy in estimation of location of the sensor depends on the position it is placed on the human body, configuration of the base station and the propagation phenomenon in the indoor environment in which localisation is taking place. The high cm accuracy obtained makes UWB technology suitable for various indoor applications in field of healthcare, sports, industry and day to day life.

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