Radio channel measurements in 868 MHz off-body communications in a ferry environment

Cwalina, Krzysztof; Ambroziak, Slawomir J.; Rajchowski, Piotr; Correia, Luıs M.

doi:10.23919/ursigass.2017.8104968

Cited by 10 publications

(11 citation statements)

References 10 publications

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“…In Table 2, the parameters of the fitted lognormal distribution are shown. The average value oscillates around 0 dB, which is in line with the results presented in the literature [28,29]. It also means that the adaptive low-pass filter (Equation (4)) was correctly implemented.…”

Section: Body Shadowing Componentsupporting

confidence: 89%

“…It should be mentioned that the preliminary results, including the mean and the standard deviation system loss values are presented in [29,30], hence, they are not analyzed in detail in this The LOS and NLOS conditions were determined by the presence of the metallic walls between MN and RN. The APR scenario is reversed with respect to the DEP one, i.e., from the aspect of the walking direction and the starting and ending points of the route.…”

Section: Analysis Of the Resultsmentioning

confidence: 99%

Section: Analysis Of the Resultsmentioning

confidence: 99%

“…The results of the distance estimation by RDM indicated the significant differences in the radio wave propagation across the environment. In this environment the waves propagate along the corridor due to the metal structure and the waveguide effect, unlike in the typical indoor environments, where the radio waves can propagate along the direct line (even through the walls) between MN and RN [29,30].…”

Section: Analysis Of the Resultsmentioning

confidence: 99%

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An Off-Body Narrowband and Ultra-Wide Band Channel Model for Body Area Networks in a Ferryboat Environment

2018

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Abstract:In the article an off-body narrowband and ultra-wide band channel model for body area networks in a ferryboat environment is described. Considering the limited number of publications there is a need to develop an off-body channel model, which will facilitate the design of radio links, both from the multimedia services provider and the security point of view, for body area networks in this atypical environment. A mobile heterogeneous measurement stand, using radio distance measurements, which consists of three types of devices: miniaturized mobile nodes, stationary reference nodes, and a data acquisition server, was developed. A detailed analysis of both radio channels' parameters was carried out. An analysis of system loss for off-body communication, including mean system loss, large-scale fading (corresponding to body shadowing), and small-scale fading (associated with the multipath phenomenon), both for 868 MHz narrowband and for 6489 MHz ultra-wide band channels, was performed. A statistical analysis of the obtained system loss model parameters was also carried out; good fit to the empirical data is observed.

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Section: Body Shadowing Componentsupporting

confidence: 89%

Section: Analysis Of the Resultsmentioning

confidence: 99%

Section: Analysis Of the Resultsmentioning

confidence: 99%

Section: Analysis Of the Resultsmentioning

confidence: 99%

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An Off-Body Narrowband and Ultra-Wide Band Channel Model for Body Area Networks in a Ferryboat Environment

2018

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“…In [10,11], one can find description of experimental facilities and scenarios for on-body channels at 2.45 GHz that can be used for analysis of correlation between signals received by two antennas placed in different positions on the body. In the literature, there are also papers containing descriptions of measurement stands for simple Single Input Single Output (SISO) channels, e.g., on-body channels at ultrawideband (UWB) frequencies [12][13][14], off-body channels at 868 MHz [15], or body-to-body channels for UWB and ISM bands [16,17]. To the best of the author's knowledge, there are no papers describing a versatile measurement stand and methodology for comprehensive investigations of off-body and body-to-body radio channels in WBANs with space and polarization diversity schemes.…”

Section: Introductionmentioning

confidence: 99%

Measurement Stand and Methodology for Research of the Off-Body and Body-to-Body Radio Channels in WBANs with Different Diversity Schemes

Ambroziak

2019

International Journal of Antennas and Propagation

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The concept of an experimental test bed for system loss and channel impulse response measurements for off-body and body-tobody radio channels in wireless body area networks (WBANs) is fully described. The possible measurement scenarios that may occur in investigation of off-body and body-to-body channels are classified and described in detail. Additionally, an evaluation is provided of the standard and expanded uncertainties of the presented measurement stand and methodology. Finally, the exemplary results are presented and discussed, in order to point out the need for further investigations of different diversity schemes and their applications in WBANs.

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Fast Fading Characterization for Body Area Networks in Circular Metallic Indoor Environments

et al. 2020

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With the increasing development of 5G and Body Area Network based systems being implemented in unusual environments, propagation inside metallic structures is a key aspect to characterize propagation effects inside ships and other similar environments, mostly composed of metallic walls. In this paper, indoor propagation inside circular metallic structures is addressed and fast fading statistical distributions parameters are obtained from simulation, being assessed with measurements at 2.45 GHz in a passenger ferry discotheque with an 8 m diameter circular shape. It is observed that, in this kind of environments, second order reflections are particularly relevant due to the walls' high reflective nature. Globally, it is concluded that the Rayleigh distribution can be used to characterize fast fading effects with no significant loss of accuracy compared to the Rice one, since a low value of the Rice parameter is observed, being below 3.1 dB, even under Line-of-Sight conditions. Moreover, it is observed that, from the fast fading viewpoint, the best transmitter position is at the circle center. INDEX TERMS Body area networks, fading characterization, metallic structures, propagation modelling.

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Radio channel measurements in 868 MHz off-body communications in a ferry environment

Cited by 10 publications

References 10 publications

An Off-Body Narrowband and Ultra-Wide Band Channel Model for Body Area Networks in a Ferryboat Environment

An Off-Body Narrowband and Ultra-Wide Band Channel Model for Body Area Networks in a Ferryboat Environment

Measurement Stand and Methodology for Research of the Off-Body and Body-to-Body Radio Channels in WBANs with Different Diversity Schemes

Fast Fading Characterization for Body Area Networks in Circular Metallic Indoor Environments

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