Wireless Location Technologies and Applications

Cramér-Rao-Type Bounds for Localization

The localization problem is fundamentally important for sensor networks. This paper, based on "Estimation bounds for localization" by the authors (2004 © IEEE), studies the Cramér-Rao lower bound (CRB) for two...

Authors: Cheng Chang and Anant Sahai

Autonomous Positioning Techniques Based on Cramér-Rao Lower Bound Analysis

We consider the problem of autonomously locating a number of asynchronous sensor nodes in a wireless network. A strong focus lies on reducing the processing resources needed to solve the relative positioning p...

Authors: Mats Rydström, Andreu Urruela, Erik G. Ström and Arne Svensson

Advanced Integration of WiFi and Inertial Navigation Systems for Indoor Mobile Positioning

This paper presents an aided dead-reckoning navigation structure and signal processing algorithms for self localization of an autonomous mobile device by fusing pedestrian dead reckoning and WiFi signal streng...

Authors: Frédéric Evennou and François Marx

Particle Filtering Algorithms for Tracking a Maneuvering Target Using a Network of Wireless Dynamic Sensors

We investigate the problem of tracking a maneuvering target using a wireless sensor network. We assume that the sensors are binary (they transmit '1' for target detection and '0' for target absence) and capabl...

Authors: Joaquín Míguez and Antonio Artés-Rodríguez

Systematic Errors and Location Accuracy in Wireless Networks

Wireless systems already provide time delay and signal strength measurements and the future may see antenna arrays that provide directional information. All these may be used for positioning. Although the stat...

Authors: Harri Saarnisaari and Timo Bräysy

An Innovative Gateway for Indoor Positioning

Enabling the pervasive paradigm requires the incorporation of location information. Retrieving location data has been a field of ongoing research for both the outdoor and indoor wireless systems. The results i...

Authors: Giannis F. Marias, Giorgos Papazafeiropoulos, Nikos Priggouris, Stathes Hadjiefthymiades and Lazaros Merakos

Performance Evaluation of Indoor Localization Techniques Based on RF Power Measurements from Active or Passive Devices

The performance of networks for indoor localization based on RF power measurements from active or passive devices is evaluated in terms of the accuracy, complexity, and costs. In the active device case, the te...

Authors: Damiano De Luca, Franco Mazzenga, Cristiano Monti and Marco Vari

A New Location Estimation System for Wireless Networks Based on Linear Discriminant Functions and Hidden Markov Models

Location estimation is a recent interesting research area that 0exploits the possibilities of modern communication technology. In this paper, we present a new location system for wireless networks that is espe...

Authors: Galo Nuño-Barrau and José M. Páez-Borrallo

Application of Beamforming in Wireless Location Estimation

A simple technique to estimate the position of a given mobile source inside a building is based on the received signal strength. For this methodology to have a reasonable accuracy, radio visibility of the mobi...

Authors: Kamran Sayrafian-Pour and Dominik Kaspar

Feedforward Delay Estimators in Adverse Multipath Propagation for Galileo and Modernized GPS Signals

The estimation with high accuracy of the line-of-sight delay is a prerequisite for all global navigation satellite systems. The delay locked loops and their enhanced variants are the structures of choice for t...

Authors: Elena Simona Lohan, Abdelmonaem Lakhzouri and Markku Renfors

Robust Estimator for Non-Line-of-Sight Error Mitigation in Indoor Localization

Indoor localization systems are undoubtedly of interest in many application fields. Like outdoor systems, they suffer from non-line-of-sight (NLOS) errors which hinder their robustness and accuracy. Though man...

Authors: R. Casas, A. Marco, J. J. Guerrero and J. Falcó

A New Position Location System Using DTV Transmitter Identification Watermark Signals

A new position location technique using the transmitter identification (TxID) RF watermark in the digital TV (DTV) signals is proposed in this paper. Conventional global positioning system (GPS) usually does n...

Authors: Xianbin Wang, Yiyan Wu and Jean-Yves Chouinard

Blind Mobile Positioning in Urban Environment Based on Ray-Tracing Analysis

A novel scheme is described for determining the position of an unknown mobile terminal without any prior information of transmitted signals, keeping in mind, for example, radiowave surveillance. The proposed p...

Authors: Shohei Kikuchi, Akira Sano and Hiroyuki Tsuji

Wireless Location Technologies and Applications

Authors: Thomas Kaiser, Ian Oppermann and Domenico Porcino

Time of Arrival Estimation for UWB Localizers in Realistic Environments

This paper investigates time of arrival (ToA) estimation methods for ultra-wide bandwidth (UWB) propagation signals. Different algorithms are implemented in order to detect the direct path in a dense multipath...

Authors: Chiara Falsi, Davide Dardari, Lorenzo Mucchi and Moe Z Win

Adaptive Subchip Multipath Resolving for Wireless Location Systems

Reliable positioning of cellular users in a mobile environment requires accurate resolving of overlapping multipath components. However, this task is difficult due to fast channel fading conditions and data il...

Authors: Nabil R Yousef, Ali H Sayed and Nima Khajehnouri

A Constrained Least Squares Approach to Mobile Positioning: Algorithms and Optimality

The problem of locating a mobile terminal has received significant attention in the field of wireless communications. Time-of-arrival (TOA), received signal strength (RSS), time-difference-of-arrival (TDOA), a...

Authors: KW Cheung, HC So, W-K Ma and YT Chan

Practical Network-Based Techniques for Mobile Positioning in UMTS

This paper presents results of research on network-based positioning for UMTS (universal mobile telecommunication system). Two new applicable network-based cellular location methods are proposed and assessed b...

Authors: Jakub Borkowski and ukka Lempiäinen