Based on the statistical property of the non-line-of-sight(NLOS)propagation in the mobile communication environment

an effective location method is presented to mitigate the influence of the NLOS propagation.First

the excess delay caused by the NLOS propagation is estimated using the measured time of arrival(TOA)and the statistical property of NLOS propagation; and then the excess delay is removed from the measured TOA to estimate the line of sight(LOS)propagation time and the position location of the mobile station(MS); finally

the position locations of the MS of different time are smoothed to improve the precision of the position location of the MS.The location of the MS estimated by this method is unbiased.The method does not increase the cost.It is a simple and practical method.Its effectiveness is verified by the simulation results.