Localization of an RF source inside the Human body for Wireless Capsule Endoscopy
Författare
Summary, in English
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.
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.
Avdelning/ar
Publiceringsår
2013
Språk
Engelska
Sidor
48-54
Fulltext
- Available as PDF - 343 kB
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Länkar
Dokumenttyp
Konferensbidrag
Ämne
- Electrical Engineering, Electronic Engineering, Information Engineering
Conference name
8th International Conference on Body Area Networks, BodyNets 2013
Conference date
2013-09-30 - 2013-10-02
Status
Published
Projekt
- EIT_UPD Wireless Communication for Ultra Portable Devices
Forskningsgrupp
- Radio Systems