Improve the positioning accuracy for wireless sensor nodes based on TFDA and TFOA using data fusion

In wireless sensor networks (WSN), location information acquisition is critical to guarantee their performance. This paper presents the positioning methods in WSN with based on the linear frequency modulation continuous wave (FMCW) techniques. Reference nodes with known locations transmit linear FMCW reference signals, while other sensor nodes estimate their locations based on the time frequency difference arrival (TFDA) or time frequency of arrival (TFOA). The geometric locations of RNs affect the location accuracy. In order to overcome the geometric dilution of precision (GDOP) effect and improve the location accuracy, the data fusion method is proposed. The location estimates from TFDA and TFOA are combined using Bayes rule. The simulation results show that the data fusion method enjoys higher location accuracy.

[1]  Dragos Niculescu,et al.  Positioning in ad hoc sensor networks , 2004, IEEE Network.

[2]  Fang Liu,et al.  LKE: A Self-Configuring Scheme for Location-Aware Key Establishment in Wireless Sensor Networks , 2008, IEEE Transactions on Wireless Communications.

[3]  MengChu Zhou,et al.  A Position-Based Clustering Technique for Ad Hoc Intervehicle Communication , 2008, IEEE Transactions on Systems, Man, and Cybernetics, Part C (Applications and Reviews).

[4]  Sen M. Kuo,et al.  An innovative positioning method based on linear frequency modulation for wireless sensor networks , 2009, 2009 IEEE/INFORMS International Conference on Service Operations, Logistics and Informatics.

[5]  Andrew Gerald Stove,et al.  Linear FMCW radar techniques , 1992 .

[6]  G. S. Dow,et al.  A W-band single-chip transceiver for FMCW radar , 1993, IEEE 1993 Microwave and Millimeter-Wave Monolithic Circuits Symposium Digest of Papers.

[7]  B. R. Badrinath,et al.  Ad hoc positioning system (APS) using AOA , 2003, IEEE INFOCOM 2003. Twenty-second Annual Joint Conference of the IEEE Computer and Communications Societies (IEEE Cat. No.03CH37428).

[8]  Joseph Shmuel Picard,et al.  Network Localization with Biased Range Measurements , 2008, IEEE Transactions on Wireless Communications.

[9]  Ian F. Akyildiz,et al.  Sensor Networks , 2002, Encyclopedia of GIS.

[10]  WADE FOY,et al.  Position-Location Solutions by Taylor-Series Estimation , 1976, IEEE Transactions on Aerospace and Electronic Systems.

[11]  Elliott D. Kaplan.  Understanding GPS : principles and applications , 1996 .

[12]  Yanwei Wang,et al.  Relative location in wireless networks , 2001, IEEE VTS 53rd Vehicular Technology Conference, Spring 2001. Proceedings (Cat. No.01CH37202).