Title :
Location using LOS range estimation in NLOS environments
Author :
Venkatraman, 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 an algorithm for mitigating the non-line-of-sight (NLOS) error that corrupts time of arrival (TOA), or range, measurements. The method uses the available data regarding the ranges and the base station (BS) layout, in conjunction with cell geometry, to adjust the measured ranges to near their true line-of-sight (LOS) values. The range adjustments are obtained by scaling the NLOS ranges using scale factors that are estimated from a constrained nonlinear optimization problem.
Keywords :
cellular radio; optimisation; parameter estimation; radio direction-finding; LOS; NLOS error; NLOS range scaling location algorithm; base station layout; cell geometry; constrained nonlinear optimization; cost function; line-of-sight; mobile station location; nonline-of-sight error; radio location systems; range measurement; scale factors; time of arrival measurement; Base stations; Constraint optimization; Error analysis; FCC; Geometry; History; Intelligent networks; Noise measurement; Telecommunications; Time measurement;
Conference_Titel :
Vehicular Technology Conference, 2002. VTC Spring 2002. IEEE 55th
Print_ISBN :
0-7803-7484-3
DOI :
10.1109/VTC.2002.1002609
