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As the human eye is sensitive to low-rate changes, VLP systems often convey location information through light flickering over 1 KHz, which induces a heavy burden on the VLP receiver. Existing solutions either rely on the high-resolution cameras or a dedicated photodiode to capture the location information, but the high power consumption and extraction deployment cost hinder their wide adoption. In this paper, we present a light-weight VLP system, NALoc, which leverages the ambient light sensor (ALS) readily on many mobile devices to sense high-frequency-modulation location information. To overcome the insufficient sampling ability of ALS, we exploit the nonlinearity of ALS to sense the leaked energy from high frequency(\u2265 1 KHz) at a low sampling rate(100 Hz). Extensive evaluations demonstrate that our system can achieve a decimeter-level localization accuracy with about 1 mW power consumption, which is 2000 times less than existing camera-based VLP solutions.<\/jats:p>","DOI":"10.1145\/3287077","type":"journal-article","created":{"date-parts":[[2018,12,27]],"date-time":"2018-12-27T19:28:03Z","timestamp":1545938883000},"page":"1-22","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":18,"title":["NALoc"],"prefix":"10.1145","volume":"2","author":[{"given":"Lin","family":"Yang","sequence":"first","affiliation":[{"name":"Noah's Ark Lab, Huawei Technologies, Shenzhen"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zeyu","family":"Wang","sequence":"additional","affiliation":[{"name":"Hong Kong University of Science and Technology, Hong Kong"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wei","family":"Wang","sequence":"additional","affiliation":[{"name":"Huazhong University of Science and Technology, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Qian","family":"Zhang","sequence":"additional","affiliation":[{"name":"Hong Kong University of Science and Technology, Hong Kong"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"320","published-online":{"date-parts":[[2018,12,27]]},"reference":[{"key":"e_1_2_1_1_1","unstructured":"AMS. 2010. 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