DocumentCode :
3425663
Title :
Location estimation accuracy in wireless sensor networks
Author :
Patwari, Neal ; Hero, Alfred O., III
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA
Volume :
2
fYear :
2002
fDate :
3-6 Nov. 2002
Firstpage :
1523
Abstract :
The peer-to-peer nature of a wireless sensor network presents the opportunity for accurate and low-configuration sensor location estimation. Range measurements are made between pairs of sensors, regardless of their a priori coordinate knowledge. This paper quantifies via the Cramer-Rao bound (CRB) variance limits on location estimators which use measured time-of-arrival (TOA) or received signal strength (RSS). An extensive campaign measures TOA and RSS in a 44-device multipoint-to-multipoint indoor network for input into maximum-likelihood estimators (MLE) of location. RMS location errors of 1.2 and 2.2 m are demonstrated using TOA and RSS, respectively.
Keywords :
ad hoc networks; distance measurement; distributed sensors; indoor radio; maximum likelihood estimation; parameter estimation; 1.2 m; 2.2 m; CRB variance limits; Cramer-Rao bound; MLE; RMS location errors; RSS; TOA measurement; location estimation accuracy; maximum-likelihood estimators; multipoint-to-multipoint indoor network; peer-to-peer network; range measurements; received signal strength; sensor location estimation; time-of-arrival measurement; wireless sensor networks; Constraint optimization; Coordinate measuring machines; Costs; Distributed algorithms; Global Positioning System; Intelligent networks; Peer to peer computing; Power measurement; State estimation; Wireless sensor networks;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signals, Systems and Computers, 2002. Conference Record of the Thirty-Sixth Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
ISSN :
1058-6393
Print_ISBN :
0-7803-7576-9
Type :
conf
DOI :
10.1109/ACSSC.2002.1197033
Filename :
1197033
Link To Document :
بازگشت