Title :
Position location by time reversal in communication networks
Author :
Jin, Yuanwei ; O´Donoughue, Nicholas ; Moura, José M F
Author_Institution :
Carnegie Mellon Univ., Pittsburgh, PA
fDate :
March 31 2008-April 4 2008
Abstract :
Multipath effects are significant in urban or indoor communications. Current position location techniques such as TDOA suffer from multipath effects, which reduces the estimation accuracy. In this paper we propose time-reversal in a wireless communication network, where a mobile terminal wants to determine, through feedback, its own position in the request of the base station. The proposed method improves the estimation accuracy and reduces the estimation variance compared with correlation based method. We derive the closed form of the Cramer-Rao bound (CRB) on the time reversal estimation and the correlation estimation, showing that time reversal achieves a smaller CRB than the correlation method. Numerical examples are presented to illustrate the behavior of these bounds.
Keywords :
Fourier transforms; correlation methods; indoor communication; position measurement; Cramer-Rao bound; TDOA; communication networks; correlation estimation; estimation accuracy; indoor communications; position location; time reversal estimation; Base stations; Communication networks; Electromagnetic scattering; Feedback; Global Positioning System; Multipath channels; Radio frequency; Time difference of arrival; Transmitters; Wireless sensor networks; Cramer-Rao Bound; Localization Accuracy; Position Measurement; Time Reversal;
Conference_Titel :
Acoustics, Speech and Signal Processing, 2008. ICASSP 2008. IEEE International Conference on
Conference_Location :
Las Vegas, NV
Print_ISBN :
978-1-4244-1483-3
Electronic_ISBN :
1520-6149
DOI :
10.1109/ICASSP.2008.4518281