Title :
Analysis of a Linear Least-Squares Localization Technique in LOS and NLOS Environments
Author :
Guvenc, Ismail ; Chong, Chia-Chin ; Watanabe, Fujio
Author_Institution :
DoCoMo Commun. Lab. USA, Inc., Palo Alto, CA
Abstract :
In this paper, we analyze the localization accuracy of a linear least-squares technique both theoretically and via simulations. Closed-form expressions for the mean square localization errors are derived both for line-of-sight (LOS) and non-line-of-sight (NLOS) scenarios and compared with the Cramer-Rao lower bound (CRLB). Analysis reveals that the localization error tends to increase as the mobile terminal moves away from the reference base-station.
Keywords :
least squares approximations; mean square error methods; mobile radio; signal processing; Cramer-Rao lower bound; LOS environment; NLOS environment; line-of-sight scenario; linear least-squares localization technique; localization accuracy; mean square localization errors; mobile terminal; nonline-of-sight scenario; AWGN; Additive white noise; Analytical models; Closed-form solution; Gaussian noise; Land mobile radio cellular systems; Least squares approximation; Nonlinear equations; Position measurement; Wireless sensor networks;
Conference_Titel :
Vehicular Technology Conference, 2007. VTC2007-Spring. IEEE 65th
Conference_Location :
Dublin
Print_ISBN :
1-4244-0266-2
DOI :
10.1109/VETECS.2007.391
