Characterization of the Ultra Wideband Body Area Propagation Channel

Fort, A.; Desset, Claude; Ryckaert, Julien; Doncker, Philippe De; Biesen, Leo Van; Wambacq, Piet

doi:10.1109/icu.2005.1569950

Cited by 94 publications

(91 citation statements)

References 10 publications

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“…S ∼ N(0, σ 2 s )). The obtained average path-loss exponent is 2.83 which is roughly in agreement with the physical experiment results reported in [8], [9]. The slight difference could be due to the different antennas used in those studies and the UWB antenna that we have used in our simulation.…”

Section: Simulation Scenarios and Resultssupporting

confidence: 80%

“…Authors in [7] conduct measurement around the human torso in various parallel planes and obtain a pathloss exponent of around 5.8. Path loss exponents of around 3 have also been reported when measurements are performed in front of the torso [8], [9]. These discrepancies simply point to the need for more detailed studies in order to understand the behavior of Radio Frequency (RF) waves over the human body surface.…”

Section: Introductionmentioning

confidence: 90%

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RF Propagation and Channel Modeling for UWB Wearable Devices

Yazdandoost

Sayrafian-Pour

Honda

2011

IEICE Trans. Commun.

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SUMMARYWireless body area network for sensing and monitoring of vital signs is the one of most rapidly growing wireless communication system and Ultra Wide-Band (UWB) is a favorable technology for wearable medical sensors. The wireless body area networks promise to revolutionize health monitoring. However, designers of such systems face a number of challenging tasks. Efficient transceiver design requires in-depth understanding of the propagation media which in this case is the human body surface. The human body is not an ideal medium for RF wave transmission; it is partially conductive and consists of materials of different dielectric constants, thickness and characteristic impedance. The results of the few measurement experiments in recent publications point to varying conclusions in the derived parameters of the channel model. As obtaining large amount of data for many scenarios and use-cases is difficult for this channel, a detailed simulation platform can be extremely beneficial in highlighting the propagation behavior of the body surface and determining the best scenarios for limited physical measurements. In this paper, an immersive visualization environment is presented, which is used as a scientific instrument that gives us the ability to observe three-dimensional RF propagation from wearable medical sensors around a human body. We have used this virtual environment to further study UWB channels over the surface of a human body. Parameters of a simple statistical path-loss model and their sensitivity to frequency and the location of the sensors on the body are discussed. key words: UWB antenna, immersive visualization system, channel model, body area network

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Section: Simulation Scenarios and Resultssupporting

confidence: 80%

Section: Introductionmentioning

confidence: 90%

RF Propagation and Channel Modeling for UWB Wearable Devices

Yazdandoost

Sayrafian-Pour

Honda

2011

IEICE Trans. Commun.

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“…Furthermore, less path loss is observed in line of sight (LOS) communication as compared to non line of sight due to capability of body fluid to absorb waves [8]. Fast movement of human can also greatly affect the signal loss, by increasing movement and degree of movement, more signal loss occur [9][10][11]. There are many research and design issues in antenna and radios that must be resolved to enable efficient and flawless deployment of WBAN.…”

Section: Introductionmentioning

confidence: 99%

Multi-Channel Framework for Body Area Network in Health Monitoring

Alrajeh¹,

Khan²,

Campbell³

et al. 2013

Appl. Math. Inf. Sci.

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Increasing use of wireless networks has empowered the facility of ubiquitous health monitoring especially in advanced countries. Various small devices are attached to human body forming personalized wireless body area network (WBAN). These small devices interact with each other using different radios and antennas schemes proposed by many researchers around the globe. However, most of these schemes are facing problem of inefficiency due to fading and shadowing effects. We propose a novel multi-radio multichannel framework for efficient communication among devices in WBAN. The focus of this research is to ensure energy efficient and reliable communication in WBAN.

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“…In [7][8][9][10][11][12][13][14], on-body radio channel characterisation was presented at the unlicensed frequency band of 2.45 GHz. UWB on-body radio propagation channel characterisation for body-centric wireless networks have been presented extensively in the open literature [15][16][17][18][19][20][21][22][23][24][25][26][27]. However, the sizes and shapes of the different human bodies will affect the propagation path and lead to different system performances.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Subject-Specific On-Body Radio Propagation Channels for Body-Centric Wireless Communications

et al. 2014

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Abstract:In this paper, subject-specific narrowband (2.45 GHz) and ultra-wideband (3-10.6 GHz) on-body radio propagation studies in wireless body area networks (WBANs) were performed by characterizing the path loss for eight different human subjects of different shapes and sizes. The body shapes and sizes of the test subjects used in this study are characterised as thin, medium build, fatty, shorter, average height and taller. Experimental investigation was made in an indoor environment using a pair of printed monopoles (for the narrowband case) and a pair of tapered slot antennas (for the ultra-wideband (UWB) case). Results demonstrated that, due to the different sizes, heights and shapes of the test subjects, the path loss exponent value varies up to maximum of 0.85 for the narrowband on-body case, whereas a maximum variation of the path loss exponent value of 1.15 is noticed for the UWB case. In addition, the subject-specific behaviour of the on-body radio propagation channels was compared between narrowband and UWB systems, and it was deduced that the on-body radio channels are subject-specific for both narrowband and UWB system cases, when the same antennas (same characteristics) are used. The effect of the human body shape and size variations on the eight different on-body radio channels is also studied for both the narrowband and UWB cases.

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Characterization of the Ultra Wideband Body Area Propagation Channel

Cited by 94 publications

References 10 publications

RF Propagation and Channel Modeling for UWB Wearable Devices

RF Propagation and Channel Modeling for UWB Wearable Devices

Multi-Channel Framework for Body Area Network in Health Monitoring

Experimental Investigation of Subject-Specific On-Body Radio Propagation Channels for Body-Centric Wireless Communications

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