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Localization of an RF source inside the Human body for Wireless Capsule Endoscopy

Chandra, Rohit LU ; Johansson, Anders J LU and Tufvesson, Fredrik LU (2013) 8th International Conference on Body Area Networks, BodyNets 2013 p.48-54
Abstract
This paper presents a method based on the phase dierence

of arrival and the non-linear least square estimation to lo-

calize a radio-frequency (RF) source, e.g a wireless capsule

endoscope, inside the human body. The phase dierence of

arrival at multiple frequencies of a signal is used to estimate

the distance of the source to a receiver. The linear least

square estimation is used to estimate the initial position of

the source followed by a non-linear least square method to

improve the localization accuracy. The method is applied on

noise free simulated data obtained from FDTD simulations

in the 403.5 MHz MedRadio band of a simple ... (More)
This paper presents a method based on the phase dierence

of arrival and the non-linear least square estimation to lo-

calize a radio-frequency (RF) source, e.g a wireless capsule

endoscope, inside the human body. The phase dierence of

arrival at multiple frequencies of a signal is used to estimate

the distance of the source to a receiver. The linear least

square estimation is used to estimate the initial position of

the source followed by a non-linear least square method to

improve the localization accuracy. The method is applied on

noise free simulated data obtained from FDTD simulations

in the 403.5 MHz MedRadio band of a simple homogeneous

phantom and a more realistic heterogeneous phantom. The

distance between the true position and the estimated po-

sition is found to be within 1 cm for the simulated cases

showing the possibility to use the proposed method for lo-

calization of an RF source inside the human body, as long

as the signal to noise ratio is high enough. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to conference
publication status
published
subject
pages
48 - 54
conference name
8th International Conference on Body Area Networks, BodyNets 2013
DOI
10.4108/icst.bodynets.2013.253713
project
EIT_UPD Wireless Communication for Ultra Portable Devices
language
English
LU publication?
yes
id
98eb5a1b-93b9-45e1-ae27-b6562f37fc09 (old id 3972275)
date added to LUP
2013-08-16 13:35:59
date last changed
2016-08-15 13:28:49
@misc{98eb5a1b-93b9-45e1-ae27-b6562f37fc09,
  abstract     = {This paper presents a method based on the phase dierence<br/><br>
of arrival and the non-linear least square estimation to lo-<br/><br>
calize a radio-frequency (RF) source, e.g a wireless capsule<br/><br>
endoscope, inside the human body. The phase dierence of<br/><br>
arrival at multiple frequencies of a signal is used to estimate<br/><br>
the distance of the source to a receiver. The linear least<br/><br>
square estimation is used to estimate the initial position of<br/><br>
the source followed by a non-linear least square method to<br/><br>
improve the localization accuracy. The method is applied on<br/><br>
noise free simulated data obtained from FDTD simulations<br/><br>
in the 403.5 MHz MedRadio band of a simple homogeneous<br/><br>
phantom and a more realistic heterogeneous phantom. The<br/><br>
distance between the true position and the estimated po-<br/><br>
sition is found to be within 1 cm for the simulated cases<br/><br>
showing the possibility to use the proposed method for lo-<br/><br>
calization of an RF source inside the human body, as long<br/><br>
as the signal to noise ratio is high enough.},
  author       = {Chandra, Rohit and Johansson, Anders J and Tufvesson, Fredrik},
  language     = {eng},
  pages        = {48--54},
  title        = {Localization of an RF source inside the Human body for Wireless Capsule Endoscopy},
  url          = {http://dx.doi.org/10.4108/icst.bodynets.2013.253713},
  year         = {2013},
}