Title :
Cooperative Positioning for the Converged Networks
Author :
Zhang Yiheng ; Cui Qimei ; Tao Xiaofeng
Author_Institution :
Key Lab. of Universal Wireless Commun., Beijing Univ. of Posts & Telecommun., Beijing
Abstract :
The wireless cooperative positioning scheme based on information fusion is proposed in this paper. The scheme combines large-scale TOA and small-scale distance measured in the converged networks. The asymptotically efficient estimator based on maximum likelihood (ML) estimation is introduced in the proposed scheme, and the position of mobile terminal is estimated with closed-form solution. Moreover, the Cramer-Rao lower bound (CRLB) of location error is analyzed in theory. Theoretical analysis and simulation results verify that the proposed scheme can significantly enhance the location accuracy, especially in NLOS environment, and the MSE performance of the location estimator will approximate the CRLB as the number of reference terminals increases.
Keywords :
maximum likelihood estimation; radio direction-finding; time-of-arrival estimation; Cramer-Rao lower bound; information fusion; maximum likelihood estimation; mobile terminal; non-line-of-sight; time-of-arrival estimation; wireless cooperative positioning; Closed-form solution; Error analysis; FCC; Iterative algorithms; Large-scale systems; Maximum likelihood estimation; Performance analysis; Position measurement; Wireless communication; Wireless networks;
Conference_Titel :
Vehicular Technology Conference, 2009. VTC Spring 2009. IEEE 69th
Conference_Location :
Barcelona
Print_ISBN :
978-1-4244-2517-4
Electronic_ISBN :
1550-2252
DOI :
10.1109/VETECS.2009.5073469