Measurements of on-body propagation characteristics

Hall, Peter; Ricci, María Luz Martínez; Hee, T.M.

doi:10.1109/aps.2002.1016087

Cited by 31 publications

(10 citation statements)

References 3 publications

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“…Initial studies in [20] reported peak-to-peak signal variations of 16 dB between belt-and shoulder-worn antennas when changes in body posture occurred. In [19], the walking process in different environments (i.e., anechoic chamber, open office area and hallway) was characterized.…”

Section: Radio Channel Characterization For a Jogging Scenariomentioning

confidence: 98%

Physiological Features from an On-Body Radio Propagation Channel

Munoz

Foster

Hao

2012

2012 Ninth International Conference on Wearable and Implantable Body Sensor Networks

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A pair of low-power wireless sensor nodes, operating in the 2.45 GHz ISM band, are used to record the radio propagation of a particular on-body channel, the waistchest channel. The recorded time-sampled radio link data is analysed in the frequency domain. It is shown that the wave propagation along the human body's surface embeds not only the radio channel characteristics, but also physiological features.

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Section: Radio Channel Characterization For a Jogging Scenariomentioning

confidence: 98%

Physiological Features from an On-Body Radio Propagation Channel

Munoz

Foster

Hao

2012

2012 Ninth International Conference on Wearable and Implantable Body Sensor Networks

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“…In addition, the pattern diversity antenna produced better diversity gain than the space diversity antenna for the same antenna spacing [4]. There are much works on establishing the antenna types on the body [5] as well as the characterization of onbody channels [6], [7]. However, there is no experimental or simulated data available for onbody diversity measurements.…”

Section: Introductionmentioning

confidence: 96%

Onbody Diversity and Angle-of-Arrival Measurement Using a Pattern Switching Antenna

Kamarudin

Nechayev²,

Hall³

2009

IEEE Trans. Antennas Propagat.

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Diversity is one of the methods to overcome the multipath effect in the mobile environment. A pattern diversity antenna with four beams was used to investigate the diversity performance in the onbody environment. A switched diversity combining method-switch-and-stay strategy-was used to analyze the data. Finding an angle of arrival (AoA) of different multipath components is very useful since it allows optimization of the base-station antenna radiation patterns and can be used to locate and track the handsets that operate in a particular cell. Similarly, in onbody communications, knowing the AoA enables determining the position of the antennas relative to each other and supports the design of antennas with optimized radiation patterns. Diversity and AoA measurements have been performed for five randomly movements body channels. In diversity measurements, the antenna beams are switched quickly considerably faster than the body movements. The results show that significanct gains are achieved for non-line-of-sight channels and no gain is obtained for the LOS channel since the signal is received by the same beam during the measurement. During AoA measurements, the 2-D process is chosen in which the angles are in a 2-D plane around the ground plane of the antenna. The main propagation paths of the transmitted signal are limited to a limited interval of the AoA range. These AoA estimates for onbody propagation channels can be used for designing better fixed beam and pattern diversity antennas.Index Terms-Angle of arrival (AoA), diversity gain, onbody channels and switched diversity combining, pattern diversity antenna.

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“…This on-body channel is a combination of different effects and the received ray is a grouping of rays reflecting from different parts of the human body and also from the surroundings [10]. An on-body surface wave component, a Creeping wave, is also present which propagates along human tissue.…”

Section: Introductionmentioning

confidence: 99%

Characterization of on-body communication channel for vertical and horizontal polarization of center fed dipole at GSM frequency

Khattak

Edwards

Shafi

2014

2014 Ieee Region 10 Symposium

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While designing a wearable antenna for on-body communications, particular importance is given to lessen the lossy effects of the human body on transmission coefficient. This paper presents experimental and simulation results for two different polarizations of center-fed dipole antenna on human body at mobile communication frequency. The isolated parameter is S 21 (dB). Early results suggest that vertical polarization of dipole gives better transmission coefficient than horizontal polarization.

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Measurements of on-body propagation characteristics

Cited by 31 publications

References 3 publications

Physiological Features from an On-Body Radio Propagation Channel

Physiological Features from an On-Body Radio Propagation Channel

Onbody Diversity and Angle-of-Arrival Measurement Using a Pattern Switching Antenna

Characterization of on-body communication channel for vertical and horizontal polarization of center fed dipole at GSM frequency

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