Wireless information networks
An Analysis of Error Inducing Parameters in Multihop Sensor Node Localization
IEEE Transactions on Mobile Computing
Cramér-Rao-type bounds for localization
EURASIP Journal on Applied Signal Processing
Indoor geolocation in the absence of direct path
IEEE Wireless Communications
Analysis of wireless geolocation in a non-line-of-sight environment
IEEE Transactions on Wireless Communications
Wideband radio propagation modeling for indoor geolocation applications
IEEE Communications Magazine
Indoor geolocation science and technology
IEEE Communications Magazine
IEEE Communications Magazine
Ultra-wideband radio technology: potential and challenges ahead
IEEE Communications Magazine
Ranging in a dense multipath environment using an UWB radio link
IEEE Journal on Selected Areas in Communications
Combining Positioning and Communication Using UWB Transceivers
DCOSS '09 Proceedings of the 5th IEEE International Conference on Distributed Computing in Sensor Systems
Integrated wireless access point architecture for wireless sensor networks
ICACT'09 Proceedings of the 11th international conference on Advanced Communication Technology - Volume 1
Error scaling laws for linear optimal estimation from relative measurements
IEEE Transactions on Information Theory
Performance of TOA- and RSS-based indoor geolocation for cooperative robotic applications
MELT'09 Proceedings of the 2nd international conference on Mobile entity localization and tracking in GPS-less environments
Error analysis of non-collaborative wireless localization in circular-shaped regions
Computer Networks: The International Journal of Computer and Telecommunications Networking
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In recent years there has been growing interest in ad-hoc and wireless sensor networks (WSNs) for a variety of indoor applications. Localization information in these networks is an enabling technology and in some applications it is the main sought after parameter. The cooperative localization performance of WSNs is constrained by the behavior of the utilized ranging technology in dense cluttered indoor environments. Recently, ultra-wideband (UWB) Time-of-Arrival (TOA) based ranging has exhibited potential due to its large bandwidth and high time resolution. The performance of its ranging and cooperative localization capabilities in dense indoor multipath environments, however, needs to be further investigated. Of main concern is the high probability of non-line of sight (NLOS) and Direct Path (DP) blockage between sensor nodes which biases the TOA estimation and degrades the localization performance. In this paper, based on empirical models of UWB TOA-based Outdoor-to-Indoor (OTI) and Indoor-to-Indoor (ITI) ranging, we derive and analyze cooperative localization bounds for WSNs in different indoor multipath environments: residential, manufacturing floor, old office and modern office buildings. First, we highlight the need for cooperative localization in indoor applications. Then we provide comprehensive analysis of the factors affecting localization accuracy such as network and ranging model parameters.