A High Precision Localization Algorithm in Wireless Sensor Network

Author

Zhang, Shi ; Ren, Lirong ; Xiao, Jun ; Tan, Jindong

Author_Institution

Coll. of Inf. Sci. & Eng., Northeastern Univ., Shenyang

fYear

2006

fDate

5-8 Dec. 2006

Firstpage

1

Lastpage

6

Abstract

With the development of research on wireless sensor networks (WSNs), localization in the WSNs has become a very important research point. At present, there are mainly two kinds of approaches, range-based approach and range-free approach. Localization precision of range-based approach is higher than the range-free approach. In the range-based approach, time difference of arrival (TDOA) method needs less requirements for time synchronization. This paper proposes a high precision localization algorithm based on TDOA, which utilizes average value of time difference by rolling average to decrease the measurement error, and adopts unconstrained least squares (LS) estimator to achieve the accurate localization. Simulation results and error analysis prove its validity

Keywords

direction-of-arrival estimation; least squares approximations; maximum likelihood estimation; synchronisation; time-of-arrival estimation; wireless sensor networks; anchor node; error analysis; measurement error; range-based approach; range-free approach; time difference of arrival method; time synchronization; unconstrained least squares estimation; wireless sensor network localization; Biosensors; Costs; Distance measurement; Educational institutions; Global Positioning System; Information science; Measurement errors; Temperature sensors; Time difference of arrival; Wireless sensor networks; TDOA; anchor node; wireless sensor networks localization;

fLanguage

English

Publisher

ieee

Conference_Titel

Control, Automation, Robotics and Vision, 2006. ICARCV '06. 9th International Conference on

Conference_Location

Singapore

Print_ISBN

1-4244-0341-3

Electronic_ISBN

1-4214-042-1

Type

conf

DOI

10.1109/ICARCV.2006.345464

Filename

4150249