A body-shadowing model for indoor radio communication environments

Obayashi, Shuichi; Zander, Jens

doi:10.1109/8.686781

Cited by 133 publications

(61 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A statistical human body shadowing model for indoor environments has been developed by Obayashi and Zander [13]. The model can be used to estimate the shadowing using specific indoor layouts.…”

Section: Related Workmentioning

confidence: 99%

Scooter-to-X communications: Antenna placement, human body shadowing, and channel modeling

2016

View full text Add to dashboard Cite

In countries such as Taiwan, with a high percentage of scooters, scooterrelated accidents are responsible for most injuries and deaths of all traffic accidents. One viable approach to reduce the number of accidents is to utilize short-range wireless communications between the scooter and other vehicles. This would help neighboring vehicles to detect the scooter and vice-versa, thus reducing the probability of a collision. In this paper, we perform extensive measurements to characterize communication links between a scooter and other vehicles. Our results suggest that, when the line-of-sight propagation path is blocked by the body of the scooter driver (and possibly also a passenger), shadowing of the human body results in significant signal attenuation, ranging from 9 to 18 dB on average, presenting challenging channel characteristics unique to scooters. In addition, we perform simulations, which show that it is imperative to incorporate the body shadowing effect to obtain realistic simulation results. We also develop a model to determine whether human body shadowing is in effect, given the relative positions of the transmitter and the receiver.

show abstract

Section: Related Workmentioning

confidence: 99%

Scooter-to-X communications: Antenna placement, human body shadowing, and channel modeling

2016

View full text Add to dashboard Cite

show abstract

“…Human body shadowing is one of the factors that can significantly degrade transmission quality in indoor wireless systems [6]- [8]. Moving pedestrians can intersect the direct path of the wave between the transmitting and receiving antenna, potentially blocking the line-of-sight (LOS) path.…”

Section: Propagation Model For Populated Environmentsmentioning

confidence: 99%

Prediction of variation in MIMO channel capacity for the populated indoor environment using a Radar cross-section-based pedestrian model

Ziri-Castro

Scanlon

Evans

2005

IEEE Trans. Wireless Commun.

View full text Add to dashboard Cite

“…An indication of this can be seen in the recently published Global Wearable Medical Device Market Outlook 2020, which predicts that the market of medical sensors will grow from USD 1.5 Billion in 2014 to USD 4.6 Billion by 2020 [5]. However, key limitations of wearable devices, which are still open research questions are signal drop due to body shadowing [6], polarization misalignments [7] due to body movements and degradation in antenna efficiency due to body proximity effects [8][9][10]. It is therefore imperative to understand and characterize the 'local' environment provided by the human body moving in an indoor environment and its effect on the antenna, radio channel and therefore the wearable system's performance.…”

Section: Introductionmentioning

confidence: 99%

Investigation into off-body links for wrist mounted antennas in bluetooth systems

Abdullah

Fafoutis

Mellios

et al. 2015

2015 Loughborough Antennas &Amp; Propagation Conference (LAPC)

View full text Add to dashboard Cite

General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. Full terms of use are available: http://www.bristol.ac.uk/pure/about/ebr-terms Abstract-This paper presents a detailed investigation into off-body links for wrist mounted Bluetooth Low Energy (BLE) devices for an indoor environment and revolves around three low profile antennas (microstrip patch, printed monopole and external monopole). It studies the received signal strength across different usage scenarios and obstructions such as body shadow, wall and ceiling through measurement campaigns carried out in a 2-storey house. It is observed that RSSIs show little variation from the mean value at any position in a given room of the house. In the living room, the average RSSI for patch, printed and external monopole is close to -61,-73 and -61 dBm respectively. The study describes the effect of usual obstructions such as wall and ceiling to off-body links and shows that the range of RSSI for any antenna (30 dBm at P=0.5 for Patch Antenna) is bounded at one end by the CDF of wall plus body shadow and at the other end by CDF of Line of Sight (LOS). The effect of body shadowing is studied in greater detail. It is observed that the microstrip patch antenna in LOS, under a ceiling and behind a wall, drops by approximately 15dB, 5dB and 10dB at P=0.4 when it goes into body shadow. The study also suggests that the Access Point (AP) on the ceiling provides better off-body links as compared to it in the adjacent room. The study compares the overall performance of the three antennas across all possible usage scenarios, obstructions & polarizations and concludes that the external monopole and patch antenna performs better than printed monopole by approximately 10-13 dBm. Finally, the study shows the variation of Packet Error Rate (PER) with RSSI and determines threshold values of RSSI for acceptable PERs, for reliable and robust applications.

show abstract

A body-shadowing model for indoor radio communication environments

Cited by 133 publications

References 9 publications

Scooter-to-X communications: Antenna placement, human body shadowing, and channel modeling

Scooter-to-X communications: Antenna placement, human body shadowing, and channel modeling

Prediction of variation in MIMO channel capacity for the populated indoor environment using a Radar cross-section-based pedestrian model

Investigation into off-body links for wrist mounted antennas in bluetooth systems

Contact Info

Product

Resources

About