Title :
A non-line-of-sight error mitigation algorithm in location estimation
Author_Institution :
Dept. of Electr. & Comput. Eng., Rutgers Univ., Piscataway, NJ, USA
Abstract :
The location estimation of mobile telephones is of great current interest. The two sources of range measurement errors in geolocation techniques are measuring error and non-line-of-sight (NLOS) error. The NLOS errors, derived from the blocking of direct paths, have been considered as a killer issue in the location estimation. In this paper we develop an algorithm to mitigate the NLOS errors in location estimation when the range measurements corrupted by NLOS errors are not identifiable. This algorithm, referred to as the residual weighting algorithm (Rwgh), assumes that the number of range measurements is greater than the minimum number required. The Rwgh algorithm is compared with two other generic algorithms and tested under various scenarios and NLOS error models, which includes deterministic and random NLOS error models. In both cases, Rwgh has shown the effectiveness of NLOS error mitigation in location estimation
Keywords :
land mobile radio; measurement errors; parameter estimation; radio direction-finding; radiotelephony; random processes; NLOS errors; Rwgh algorithm; deterministic NLOS error models; direct paths blocking; generic algorithms; geolocation techniques; location estimation; measuring error; mobile telephones; nonline-of-sight error mitigation algorithm; random NLOS error models; range measurement errors; range measurements; residual weighting algorithm; time of arrival estimation; Computer errors; Estimation error; Intelligent networks; Laboratories; Measurement errors; Mobile computing; Telephony; Testing; Time measurement; Transmitters;
Conference_Titel :
Wireless Communications and Networking Conference, 1999. WCNC. 1999 IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-5668-3
DOI :
10.1109/WCNC.1999.797838