Non-line-of-sight (NLOS) propagation, which widely exists in wireless systems, will degrade the performance of wireless positioning system if it is not taken into consideration in the localization algorithm design. Different from existing approaches which treat NLOS measurements as outliers and only work when there is a large number of measurements, in this paper, we propose to use Maximum Like...

This paper presents the node localization of static blind sensor nodes and the mobile anchor nodes. Each of the sensor nodes determines its own position by itself is localization. Obstacles blocking between the direct path, called as Non-Line-Of-Sight (NLOS), which causes NLOS error. The propagation of this error results in unreliable localization and significantly decreases localization accura...

In order to enhance accuracy and reliability of wireless location in the mixed line-of-sight (LOS) and non-line-of-sight (NLOS) environments, a robust mobile location algorithm is presented to track the position of a mobile node (MN). An extended Kalman filter (EKF) modified in the updating phase is utilized to reduce the NLOS error in rough wireless environments, in which the NLOS bias contain...

An effective geometrical method which can locate a source based on the time-of-arrival (TOA) measurements and the floor plan information is proposed in simple non-line-of-sight (NLOS) indoor environment where the multiplebound scattering signal paths can be ignored. The novelty of our work resides in converting the NLOS problem into line-of-sight (LOS) problem based on the virtual stations (VSs...

Fixed broadband microwave communications are usually considered line-of-sight (LOS) technologies. Conventional wisdom holds that non-line-of-sight (NLOS) paths are of insufficient quality for broadband commercial deployments. However, it is possible that the only links available in an emergency deployment are NLOS paths. Since little work has been published regarding the usefulness of these cha...