The active badge location system
ACM Transactions on Information Systems (TOIS)
The Cricket location-support system
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
Practical robust localization over large-scale 802.11 wireless networks
Proceedings of the 10th annual international conference on Mobile computing and networking
LANDMARC: indoor location sensing using active RFID
Wireless Networks - Special issue: Pervasive computing and communications
The Horus WLAN location determination system
Proceedings of the 3rd international conference on Mobile systems, applications, and services
Pervasive and Mobile Computing
Towards mobile phone localization without war-driving
INFOCOM'10 Proceedings of the 29th conference on Information communications
FM radio for indoor localization with spontaneous recalibration
Pervasive and Mobile Computing
Indoor location sensing using geo-magnetism
MobiSys '11 Proceedings of the 9th international conference on Mobile systems, applications, and services
Indoor localization without infrastructure using the acoustic background spectrum
MobiSys '11 Proceedings of the 9th international conference on Mobile systems, applications, and services
Energy-efficient positioning for smartphones using Cell-ID sequence matching
MobiSys '11 Proceedings of the 9th international conference on Mobile systems, applications, and services
Precise indoor localization using PHY layer information
Proceedings of the 10th ACM Workshop on Hot Topics in Networks
Accurate GSM indoor localization
UbiComp'05 Proceedings of the 7th international conference on Ubiquitous Computing
You are facing the Mona Lisa: spot localization using PHY layer information
Proceedings of the 10th international conference on Mobile systems, applications, and services
You are facing the Mona Lisa: spot localization using PHY layer information
Proceedings of the 10th international conference on Mobile systems, applications, and services
Locating in fingerprint space: wireless indoor localization with little human intervention
Proceedings of the 18th annual international conference on Mobile computing and networking
Energy efficient GPS sensing with cloud offloading
Proceedings of the 10th ACM Conference on Embedded Network Sensor Systems
Tagging cities?: reading RFID tags from inside brick and mortar
Proceedings of the 10th ACM Conference on Embedded Network Sensor Systems
A2PSM: audio assisted wi-fi power saving mechanism for smart devices
Proceedings of the 14th Workshop on Mobile Computing Systems and Applications
FM-based indoor localization via automatic fingerprint DB construction and matching
Proceeding of the 11th annual international conference on Mobile systems, applications, and services
Guoguo: enabling fine-grained indoor localization via smartphone
Proceeding of the 11th annual international conference on Mobile systems, applications, and services
Vision: mapping the world in 3d through first-person vision devices with mercator
Proceeding of the fourth ACM workshop on Mobile cloud computing and services
Total variation regularization for training of indoor location fingerprints
Proceedings of the 2nd ACM annual international workshop on Mission-oriented wireless sensor networking
WASA'13 Proceedings of the 8th international conference on Wireless Algorithms, Systems, and Applications
Pharos: enable physical analytics through visible light based indoor localization
Proceedings of the Twelfth ACM Workshop on Hot Topics in Networks
Spatially Resolved Monitoring of Radio-Frequency Electromagnetic Fields
Proceedings of First International Workshop on Sensing and Big Data Mining
From RSSI to CSI: Indoor localization via channel response
ACM Computing Surveys (CSUR)
Epsilon: a visible light based positioning system
NSDI'14 Proceedings of the 11th USENIX Conference on Networked Systems Design and Implementation
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The major challenge for accurate fingerprint-based indoor localization is the design of robust and discriminative wireless signatures. Even though WiFi RSSI signatures are widely available indoors, they vary significantly over time and are susceptible to human presence, multipath, and fading due to the high operating frequency. To overcome these limitations, we propose to use FM broadcast radio signals for robust indoor fingerprinting. Because of the lower frequency, FM signals are less susceptible to human presence, multipath and fading, they exhibit exceptional indoor penetration, and according to our experimental study they vary less over time when compared to WiFi signals. In this work, we demonstrate through a detailed experimental study in 3 different buildings across the US, that FM radio signal RSSI values can be used to achieve room-level indoor localization with similar or better accuracy to the one achieved by WiFi signals. Furthermore, we propose to use additional signal quality indicators at the physical layer (i.e., SNR, multipath etc.) to augment the wireless signature, and show that localization accuracy can be further improved by more than 5%. More importantly, we experimentally demonstrate that the localization errors of FM andWiFi signals are independent. When FM and WiFi signals are combined to generate wireless fingerprints, the localization accuracy increases as much as 83% (when accounting for wireless signal temporal variations) compared to when WiFi RSSI only is used as a signature.