Title :
Optimal Positioning Algorithm in the Presence of Non-line-of-Sight Error
Author :
Lin, Xue ; Xin, Huamei ; Ju, Liu ; He, Jingliang
Author_Institution :
Coll. of Phys. & Electron., Shan Dong Normal Univ., Jinan, China
Abstract :
An optimal positioning algorithm based on polynomial fitting technique for non-line-of-sight (NLOS) environment is presented. First, NLOS errors in TOA measurements are mitigated using an orthogonal polynomial fitting technique. Then the standard deviation of LOS error is exploited to give an optimal location estimation of the mobile station (MS). Performance measure for location accuracy is calculated and comparison with least squares (LS) algorithm, constrained weighted least squares (CWLS) algorithm and Cramér-Rao lower bound (CRLB) in LOS environment is also given. Simulation results show that our proposed algorithm can achieve better location estimation in NLOS environment.
Keywords :
Global Positioning System; polynomials; radio networks; time-of-arrival estimation; Cramér-Rao lower bound; TOA measurements; constrained weighted least square algorithm; least square algorithm; mobile station estimation; nonline-of-sight error; optimal location estimation; optimal positioning algorithm; orthogonal polynomial fitting technique; wireless networks; Computer vision; Least squares methods; Length measurement; Measurement standards; Noise measurement; Nonlinear equations; Pollution measurement; Polynomials; Position measurement; Time measurement; non-line-of-sight (NLOS); optimal positioning; orthogonal polynomial fitting; time-of-arrival(TOA);
Conference_Titel :
Networks Security Wireless Communications and Trusted Computing (NSWCTC), 2010 Second International Conference on
Conference_Location :
Wuhan, Hubei
Print_ISBN :
978-0-7695-4011-5
Electronic_ISBN :
978-1-4244-6598-9
DOI :
10.1109/NSWCTC.2010.64
