Ultra-wideband (UWB) positioning systems often operate in a non-line-of-sight (NLOS) environment. NLOS propagation has become the main source of ultra-wideband indoor errors. As such, how to identify and correct errors key problem that must be solved high-accuracy technology. This paper firstly describes influence path on localization accuracy generation method signals, secondly classifies anal...

A new double-cluster statistical model for non-line-of-sight (NLOS) environment is proposed which is based on analysis of the experimental data. The model itself and the parameters estimating of the corresponding model are simplified. By defining the polarity of a particular model parameter, the model has the flexibility to deal with the “soft NLOS" and the “hard NLOS" environment. Therefore, t...

Fig. 1. Non-line-of-sight (NLOS) imaging aims at recovering the shape and albedo of objects hidden from a camera or a light source. Using ultra-fast pulsed illumination and single photon detectors, the light transport in the scene is sampled for visible objects (left). The global illumination components of these time-resolved measurements (A,E) contain sufficient information to estimate the sha...

The microwave band fixed wireless access (FWA) systems are expected to operate in non-line-of-sight (NLOS) environments in order to loosen the restrictions on antenna installation at a subscriber station (SS). In addition, it is planning to adopt array antenna at a SS in the next generation FWA. In this case, Direction of arrival (DOA) is a one of the important propagation parameters. We carrie...

IEEE 802.15.4a networks can provide the geographic routing solution with high location accuracy for the indoor environments. However, in the non-line-of-sight (NLOS) environments, the IEEE 802.15.4a networks may have a large scale location error and an unstable communication link. In this article, we propose a location estimation and dynamic link detection scheme for the geographic routing in t...

Target localization is an important issue for many applications in wireless sensor networks. However, it is rather difficult to maintain the localization accuracy in mixed line-of-sight (LOS) and non-lineof-sight (NLOS) environments as NLOS propagation leads to larger error than what LOS does. In this paper, we propose a new target localization method in mixed environments where NLOS is dominan...

This paper presents accurate empirical path loss models with route classification for the high band frequency of 5 G wireless. Propagation routes are mainly classified into line sight (LOS) and non-line-of-sight (NLOS). The NLOS 2 separate routes, namely, Hard_NLOS Soft_NLOS. Their include free-space (Lfs) multiscreen diffraction (Lmsd) together reflection from building blocks. However, these c...

For device-to-device (D2D) communications underlaying a cellular network with uplink resource sharing, both cellular and D2D links cause significant co-channel interference. In this paper, we address the critical issue of interference management in the network considering a practical path loss model incorporating both line-of-sight (LoS) and non-line-of-sight (NLoS) transmissions. To reduce the...

The need for determining the position of a mobile station (MS) is increasing rapidly in wireless communications systems. When there is non-line-of-sight (NLOS) path between the MS and base stations (BSs), it is possible to integrate many kinds of measurements to achieve more accurate measurements of the MS location. This paper proposed hybrid methods that utilize time of arrival (TOA) at five B...