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Wearable Ubiquitous Technol."],"published-print":{"date-parts":[[2020,9,4]]},"abstract":"<jats:p>Some important indoor localization applications, such as localizing a lost kid in a shopping mall, call for a new peer-to-peer localization technique that can localize an individual's smartphone or wearables by directly using another's on-body devices in unknown indoor environments. However, current localization solutions either require pre-deployed infrastructures or multiple antennas in both transceivers, impending their wide-scale application. In this paper, we present P2PLocate, a peer-to-peer localization system that enables a single-antenna device co-located with a batteryless backscatter tag to localize another single-antenna device with decimeter-level accuracy. P2PLocate leverages the multipath variations intentionally created by an on-body backscatter tag, coupled with spatial information offered by user movements, to accomplish this objective without relying on any pre-deployed infrastructures or pre-training. P2PLocate incorporates novel algorithms to address two major challenges: (i) interference with strong direct-path signal while extracting multipath variations, and (ii) lack of direction information while using single-antenna transceivers. We implement P2PLocate on commercial off-the-shelf Google Nexus 6p, Intel 5300 WiFi card, and Raspberry Pi B4. Real-world experiments reveal that P2PLocate can localize both static and mobile targets with a median accuracy of 0.88 m.<\/jats:p>","DOI":"10.1145\/3411833","type":"journal-article","created":{"date-parts":[[2020,9,4]],"date-time":"2020-09-04T21:39:45Z","timestamp":1599255585000},"page":"1-25","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":21,"title":["Peer-to-Peer Localization for Single-Antenna Devices"],"prefix":"10.1145","volume":"4","author":[{"given":"Xianan","family":"Zhang","sequence":"first","affiliation":[{"name":"Huazhong University of Science and Technology, Wuhan, Hubei, China"}]},{"given":"Wei","family":"Wang","sequence":"additional","affiliation":[{"name":"Huazhong University of Science and Technology, Wuhan, Hubei, China"}]},{"given":"Xuedou","family":"Xiao","sequence":"additional","affiliation":[{"name":"Huazhong University of Science and Technology, Wuhan, Hubei, China"}]},{"given":"Hang","family":"Yang","sequence":"additional","affiliation":[{"name":"Huazhong University of Science and Technology, Wuhan, Hubei, China"}]},{"given":"Xinyu","family":"Zhang","sequence":"additional","affiliation":[{"name":"University of California San Diego, San Diego, California, USA"}]},{"given":"Tao","family":"Jiang","sequence":"additional","affiliation":[{"name":"Huazhong University of Science and Technology, Wuhan, Hubei, China"}]}],"member":"320","published-online":{"date-parts":[[2020,9,4]]},"reference":[{"key":"e_1_2_1_1_1","first-page":"11","volume":"802","year":"2016","journal-title":"IEEE Std"},{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1145\/2486001.2486039"},{"key":"e_1_2_1_3_1","volume-title":"RADAR: An in-building RF-based user location and tracking system. 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