Title :
A scattering model based approach to NLOS mitigation in TOA location systems
Author :
Al-Jazzar, S. ; Caffery, J., Jr. ; You, H.-R.
Author_Institution :
Dept. of ECECS, Cincinnati Univ., OH, USA
fDate :
6/24/1905 12:00:00 AM
Abstract :
We present a novel approach for reducing the effect of non-line-of-sight (NLOS) error that inhibits accurate location of wireless mobile stations (MSs). The location algorithm is developed based on the distribution of times of arrival (TOAs) generated from multipath scattering models that have been published in the literature. By matching the statistics of the measured TOAs of several multipath arrivals with those produced by the scattering models, estimates of the line-of-sight (LOS) TOAs between each base station (BS) and the MS are obtained. The LOS TOAs can then be used in any traditional TOA location algorithm. The algorithm shows a significant improvement in location accuracy for a TOA system in NLOS environment.
Keywords :
electromagnetic wave scattering; land mobile radio; multipath channels; radio direction-finding; radiowave propagation; statistical analysis; NLOS environment; NLOS error; NLOS mitigation; TOA location algorithm; TOA location systems; base station; line-of-sight TOA; location accuracy; measured TOA statistics; multipath scattering models; nonline-of-sight error; signal propagation; wireless mobile stations; Global Positioning System; History; Measurement standards; Mobile handsets; Multiaccess communication; Scattering; Statistical distributions; Telephone sets; Time measurement; Wireless sensor networks;
Conference_Titel :
Vehicular Technology Conference, 2002. VTC Spring 2002. IEEE 55th
Print_ISBN :
0-7803-7484-3
DOI :
10.1109/VTC.2002.1002610
