A Channel Model for Polarized Off-Body Communications With Dynamic Users

This paper presents an off-body channel model for polarized communications with dynamic users. The model is based on Geometrical Optics and Uniform Theory of Diffraction and accounts for free space propagation, reflections, and diffractions. It allows for arbitrary antennas' polarizations and g...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2019-11, Vol.67 (11), p.7001-7013
Main Authors: Turbic, Kenan, Correia, Luis M., Beko, Marko
Format: Article
Language:English
Subjects:
Analytical models
Antenna accessories
Antennas
Body area networks (BANs)
Channel models
Computer simulation
Depolarization
Diffraction
Diffraction theory
dynamic users
Dynamics
Geometrical optics
Geometry
Polarization
polarized off-body channel
Propagation
Wearable technology
wireless communication
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Summary:This paper presents an off-body channel model for polarized communications with dynamic users. The model is based on Geometrical Optics and Uniform Theory of Diffraction and accounts for free space propagation, reflections, and diffractions. It allows for arbitrary antennas' polarizations and gain patterns and supports a number of on-body antenna placements. In order to take the influence of users' motion into account, a mobility model for wearable antennas on dynamic users is used. Signal depolarization mechanisms are identified, and simulations are performed to analyze the influence of user dynamics on the channel. The results show that significant polarization mismatch losses occur due to wearable antenna rotations, resulting in received power variations up to 37.5 dB for the line-of-sight component and 41.4 dB for the scattered one. The importance of taking signal polarization into account is demonstrated by comparing the simulation results between polarized and nonpolarized channel models in a free space propagation scenario, where a difference up to 53 dB in between the two is observed.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2019.2925157