FDTD and empirical exploration of human body and UWB radiation interaction on TOF ranging
Fecha
2019Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión aceptada / Onetsi den bertsioa
Impacto
|
10.1109/LAWP.2019.2910378
Resumen
In time-of-flight (TOF)-based human ranging systems, target sensors are often mounted on or close to the human
body, which may raise non-line-of-sight (NLOS) cases and lead
to significant ranging errors depending on the relative position between the body, transmitter (Tx), and receiver (Rx). In recent years,
ultrawideband (UWB) has become a very popular technology for
human TOF ranging, but i ...
[++]
In time-of-flight (TOF)-based human ranging systems, target sensors are often mounted on or close to the human
body, which may raise non-line-of-sight (NLOS) cases and lead
to significant ranging errors depending on the relative position between the body, transmitter (Tx), and receiver (Rx). In recent years,
ultrawideband (UWB) has become a very popular technology for
human TOF ranging, but its human body interactions have not
been studied yet extensively. In this letter, the UWB and human
body interaction is explored by the finite-difference time-domain
(FDTD) technique, and the obtained E-field strength variation results are validated by means of commercially available UWB kits.
Additionally, an UWB-ranging error model with respect to the human body shadowing effect is proposed and evaluated by extensive
measurements, i.e., in indoor environments, line-of-sight (LOS) and
NLOS are found to be well modeled by Gaussian and Gamma distributions, respectively, while in outdoor fields, LOS and NLOS
are both modeled by Gaussian distributions. The main conclusion
of this study is that there is a clear pattern between a gain in the
E-field strength and TOF ranging errors. It can be established that
in a worst-case scenario, a gain of 4–18 dB is observed, which corresponds to about 30–60 cm of TOF ranging errors. [--]
Materias
FDTD,
Human body,
UWB,
TOF,
Ranging
Editor
IEEE
Publicado en
IEEE Antennas and Wireless Propagation Letters, 18(6) 1119-1123
Departamento
Universidad Pública de Navarra. Departamento de Ingeniería Eléctrica, Electrónica y de Comunicación /
Nafarroako Unibertsitate Publikoa. Ingeniaritza Elektrikoa, Elektronikoa eta Telekomunikazio Ingeniaritza Saila /
Universidad Pública de Navarra/Nafarroako Unibertsitate Publikoa. Institute of Smart Cities - ISC