Proceedings ArticleDOI
SpotFi: Decimeter Level Localization Using WiFi
Manikanta Kotaru,Kiran Joshi,Dinesh Bharadia,Sachin Katti +3 more
- Vol. 45, Iss: 4, pp 269-282
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TLDR
SpotFi only uses information that is already exposed by WiFi chips and does not require any hardware or firmware changes, yet achieves the same accuracy as state-of-the-art localization systems.Abstract:
This paper presents the design and implementation of SpotFi, an accurate indoor localization system that can be deployed on commodity WiFi infrastructure. SpotFi only uses information that is already exposed by WiFi chips and does not require any hardware or firmware changes, yet achieves the same accuracy as state-of-the-art localization systems. SpotFi makes two key technical contributions. First, SpotFi incorporates super-resolution algorithms that can accurately compute the angle of arrival (AoA) of multipath components even when the access point (AP) has only three antennas. Second, it incorporates novel filtering and estimation techniques to identify AoA of direct path between the localization target and AP by assigning values for each path depending on how likely the particular path is the direct path. Our experiments in a multipath rich indoor environment show that SpotFi achieves a median accuracy of 40 cm and is robust to indoor hindrances such as obstacles and multipath.read more
Citations
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Proceedings ArticleDOI
Indoor Object Sensing Using Radio-Frequency Identification with Inverse Solutions
TL;DR: Both the received signal strength indicator and carrier phase from tag backscattering are assembled to generate the voxel reflectivity distribution by the inverse method, which has lower computational cost and higher locating accuracy than the conventional matched filtering.
Proceedings ArticleDOI
GPS Spoofing Detection by Leveraging 5G Positioning Capabilities
TL;DR: In this article , the authors present a technique to detect GPS spoofing attacks by comparing the final estimated location based on the GPS measurements with that derived by 5G New Radio positioning signals.
Proceedings ArticleDOI
Interpersonal Distance Tracking with mmWave Radar and IMUs
TL;DR: In this paper , a system that uses a millimeter wave radar and exploits the inertial measurement data from user-carried smartphones or wearables to track interpersonal distances is presented.
Journal ArticleDOI
3D Human Mesh Construction Leveraging Wi-Fi
Yichao Wang,James Chih-Hsin Yang +1 more
TL;DR: The proposed system has the advantage of re-using the WiFi devices that already exist in the environment for potential mass adoption, and can also work in non-line of sight (NLoS), poor lighting conditions, and baggy clothes, where the camera-based systems do not work well.
Patent
Enhancing the accuracy of angle-of-arrival device locating through machine learning
Chandail Mukul,Mirfakhraei Khashayar,Matthew A. Silverman,Zhang Xu,Gao Zhigang,Paul J. Stager +5 more
TL;DR: In this paper, a machine learning model indicative of how to focus on particular location information from a plurality of radio frequency (RF) elements to provide an accurate location estimate of a wireless client based at least in part on angle-of-arrival information of the wireless client.
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