DocumentCode :
2528186
Title :
Improved UWB localization technique for precision automobile parking system
Author :
Mary, Gerardine Immaculate ; Prithiviraj, V.
Author_Institution :
Dept. of Electron. & Commun. Eng., Pondicherry Univ., Pondicherry
fYear :
2008
fDate :
19-21 Nov. 2008
Firstpage :
1
Lastpage :
4
Abstract :
Ultra-Wideband (UWB) communication system provides high accurate localization due to the high multi-path resolution capacity. For Ultra-Wideband (UWB) Localization systems, time-based schemes namely Time of Arrival (TOA) and Time Difference of Arrival (TDOA) provide very good accuracy due to the high time resolution (large bandwidth) of UWB signals. Due to the inherent suitability and accuracy of time-based approaches for UWB systems, particularly the TDOA technique, it is proposed as the appropriate UWB localization technique for the precision automobile parking system. UWB pulse of 0.5 ns pulse width is simulated. Time-delay estimation is obtained by generalized cross correlation method and position estimation is obtained by direct method (DM) using hyperbolic navigation. The precision of the obtained position estimation is improved by an iterative Davidon-Fletcher-Powell (DFP) algorithm. The performance of the technique is analysed by determining the mean square error for various reference nodes densities. The proposed system is composed of UWB nodes, UWB tags and an UWB location server. With UWB tags, equipped only with transmitters, on targets and UWB nodes with both transmitters and receivers, installed on infrastructure, the system calculates the position of the tags precisely.
Keywords :
delay estimation; mean square error methods; time-of-arrival estimation; traffic control; ultra wideband communication; UWB localization technique; direct method; generalized cross correlation method; high multi-path resolution capacity; hyperbolic navigation; iterative Davidon-Fletcher-Powell algorithm; mean square error; position estimation; precision automobile parking system; time difference of arrival; time of arrival; time-delay estimation; ultra wideband communication system; Automobiles; Bandwidth; Correlation; Delta modulation; Navigation; Signal resolution; Space vector pulse width modulation; Time difference of arrival; Transmitters; Ultra wideband technology;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
TENCON 2008 - 2008 IEEE Region 10 Conference
Conference_Location :
Hyderabad
Print_ISBN :
978-1-4244-2408-5
Electronic_ISBN :
978-1-4244-2409-2
Type :
conf
DOI :
10.1109/TENCON.2008.4766605
Filename :
4766605
Link To Document :
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