Journal ArticleDOI
WiFi-based indoor positioning
Chouchang Yang,Huai-Rong Shao +1 more
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TLDR
Simulation results show that the WiFi-based positioning approach can achieve 1 m accuracy without any hardware change in commercial WiFi products, which is much better than the conventional solutions from both academia and industry concerning the trade-off of cost and system complexity.Abstract:
Recently, several indoor localization solutions based on WiFi, Bluetooth, and UWB have been proposed. Due to the limitation and complexity of the indoor environment, the solution to achieve a low-cost and accurate positioning system remains open. This article presents a WiFibased positioning technique that can improve the localization performance from the bottleneck in ToA/AoA. Unlike the traditional approaches, our proposed mechanism relaxes the need for wide signal bandwidth and large numbers of antennas by utilizing the transmission of multiple predefined messages while maintaining high-accuracy performance. The overall system structure is demonstrated by showing localization performance with respect to different numbers of messages used in 20/40 MHz bandwidth WiFi APs. Simulation results show that our WiFi-based positioning approach can achieve 1 m accuracy without any hardware change in commercial WiFi products, which is much better than the conventional solutions from both academia and industry concerning the trade-off of cost and system complexity.read more
Citations
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Journal ArticleDOI
An Approach to Improve the Indoor Positioning Performance of Pseudolite/UWB System with Ambiguity Resolution
TL;DR: In this article , the virtual pseudo-range measurements of UWB are used to replace the pseudolite to solve the indoor multipath problem, and the channel difference observation equation and UWB-aided ambiguity resolution are proposed for precise positioning.
Proceedings ArticleDOI
The use of Multiwall model for reference RSSI data preparation for indoor localization purposes
TL;DR: The article discusses the suitability of the multiwall radio wave propagation model for RSSI reference data preparation for fingerprinting-based indoor positioning applications and shows that for some cases it is possible to use less complex propagation models without losing sufficient localization accuracy.
Proceedings ArticleDOI
A graph anonymity-based privacy protection scheme for smart city scenarios
Man Luo,Hairong Yan +1 more
TL;DR: Wang et al. as mentioned in this paper proposed a location privacy protection scheme based on graph anonymity, which represents the spatial distribution among APs in the form of a graph model, using the method of finding clustered noisy fingerprint information in the graph model to ensure a similar performance to the real location fingerprint in the localization process, and thus will not be distinguished by the location providers.
Book ChapterDOI
Exploiting Fingerprint Correlation for Fingerprint-Based Indoor Localization: A Deep Learning-Based Approach
Proceedings ArticleDOI
Cooperative self-localization and wayfinding services through visible light communication
TL;DR: Results indicate that the VLC cooperative system is able to perform not just the self-localization, but also infer the travel direction and interact with it, optimizing the route to a static or dynamic destination.
References
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Journal ArticleDOI
Survey of Wireless Indoor Positioning Techniques and Systems
TL;DR: Comprehensive performance comparisons including accuracy, precision, complexity, scalability, robustness, and cost are presented.
Journal ArticleDOI
MUSIC, maximum likelihood, and Cramer-Rao bound
Petre Stoica,Nehorai Arye +1 more
TL;DR: The Cramer-Rao bound (CRB) for the estimation problems is derived, and some useful properties of the CRB covariance matrix are established.
Proceedings ArticleDOI
Indoor localization without the pain
TL;DR: Despite the absence of any explicit pre-deployment calibration, EZ yields a median localization error of 2m and 7m in a small building and a large building, which is only somewhat worse than the 0.7m and 4m yielded by the best-performing but calibration-intensive Horus scheme from prior work.
Journal ArticleDOI
Indoor geolocation science and technology
TL;DR: An overview of the technical aspects of the existing technologies for wireless indoor location systems is presented, providing a fundamental understanding of the issues related to indoor geolocation science that are needed for design and performance evaluation of emerging indoorGeolocation systems.
Proceedings ArticleDOI
MUSIC, maximum likelihood and Cramer-Rao bound
Petre Stoica,Arye Nehorai +1 more
TL;DR: The authors derive the Cramer-Rao bound (CRB) for the estimation problems mentioned above, and establish some useful properties of the CRB covariance matrix.
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