Survey on NLOS Identification and Error Mitigation for UWB Indoor Positioning

Indoor Positioning with Uwb Technology

A Novel NLOS Mitigation Approach for Wireless Positioning System

A Non-light-of-sight (NLOS) mitigation approach based on GBSBEM was proposed in this paper. The main idea is to model the NLOS errors to the elliptical model and mitigate them with a novel method. At the first step, the semi-minor of GBSBEM is estimated, then a way to restrain the NLOS errors with the help of the semi-minor is used. When the semi-minor can not be estimated, an optimization meth...

An Efficient NLOS Error Mitigation Method for Wireless Location

Wireless location has received considerable attention over the past few years. Many techniques, such as time-based methods (TOA and TDOA), AOA based methods, and Assisted-GPS, have been proposed. Time-based methods such as TOA and TDOA, are particularly exciting since they are sufficiently accurate for E911 under ideal conditions. However, several error sources, such as NLOS (Non-Line-Of-Sight)...

Survey on UWB Positioning System: Sampling methods

Millimeter-accuracy Ultra-Wideband (UWB) positioning systems using the Time Difference Of Arrival (TDOA) algorithm are able to be utilized in military and many other important applications. Previous research on UWB positioning system has achieved up to mm or sub-mm accuracy. However, one bottleneck in UWB system is at sampling high resolution UWB signals, as well as high resolution timing infor...

GLRT Detector for NLOS Error Reduction in Wireless Positioning Systems

The objective of this paper is to determine the potentialities of an optimal detection scheme within the framework of subscriber location. Using a Generalized Likelihood Ratio Test (GLRT), an improved first arriving path detector from propagation channel estimates is derived. Furthermore, an expression for false alarm probability is provided and detector performance is evaluated for different c...