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| Content Provider | ACM Digital Library |
|---|---|
| Author | Radunovic, Bozidar Choudhury, Romit Roy Minka, Tom Sen, Souvik |
| Abstract | This paper shows the viability of precise indoor localization using physical layer information in WiFi systems. We find that channel frequency responses across multiple OFDM sub-carriers can be suitably aggregated into a location fingerprint. While these fingerprints vary over time and environmental mobility, we notice that their core structure preserves certain properties that are amenable to localization. We demonstrate these ideas through a functional prototype, implemented on off-the-shelf Intel 5300 cards (that export per-subcarrier information to the driver). We evaluate the prototype using the existing APs inside a busy building, a cafeteria, and a museum, and demonstrate localization accuracies in the granularity of 1m × 1m boxes, called spots. Results show that our system, PinLoc, is able to localize users to a spot with 90% mean accuracy, while incurring less than 6% false positives. We believe this holds promise towards an important development in indoor localization. |
| Starting Page | 1 |
| Ending Page | 6 |
| Page Count | 6 |
| File Format | |
| ISBN | 9781450310598 |
| DOI | 10.1145/2070562.2070580 |
| Language | English |
| Publisher | Association for Computing Machinery (ACM) |
| Publisher Date | 2011-11-14 |
| Publisher Place | New York |
| Access Restriction | Subscribed |
| Subject Keyword | Wireless Cross-layer Localization Application |
| Content Type | Text |
| Resource Type | Article |
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