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Sen. Netw."],"published-print":{"date-parts":[[2023,8,31]]},"abstract":"<jats:p>\n            Existing device-free localization systems have achieved centimeter-level accuracy and show their potential in a wide range of applications. However, today\u2019s radio-based solutions fail to locate the target in millimeter-level due to their limited bandwidth and sampling rate, which constrains their applications in high-accuracy demand scenarios. We find an opportunity to break the bottleneck of existing radio-based localization systems by reconstructing the accurate signal spectral peak from the discrete samples, without changing either the bandwidth or the sampling rate of the radio hardware. This study proposes\n            <jats:italic>milliLoc<\/jats:italic>\n            , a millimeter-level radio-based localization system. We first derive a\n            <jats:italic>spectral peak reconstruction algorithm<\/jats:italic>\n            to reduce the ranging error from the previous centimeter-level to millimeter-level. Then, we improve the AoA measurement accuracy by leveraging the signal amplitude information. To ensure the practicality of\n            <jats:italic>milliLoc<\/jats:italic>\n            , we further extend our system to handle multi-target situations. We fully implement\n            <jats:italic>milliLoc<\/jats:italic>\n            on a commercial mmWave radar. Experiments show that\n            <jats:italic>milliLoc<\/jats:italic>\n            achieves a median ranging accuracy of 5.5 mm and decreases the AoA measurement error by 31.2% compared with the baseline. Our system fulfills the accuracy requirements of most application scenarios and can be easily integrated with other existing solutions, shedding light on high-accuracy location-based applications.\n          <\/jats:p>","DOI":"10.1145\/3570505","type":"journal-article","created":{"date-parts":[[2022,11,9]],"date-time":"2022-11-09T11:55:38Z","timestamp":1667994938000},"page":"1-21","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":14,"title":["Push the Limit of Millimeter-wave Radar Localization"],"prefix":"10.1145","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8822-9579","authenticated-orcid":false,"given":"Guidong","family":"Zhang","sequence":"first","affiliation":[{"name":"Tsinghua University, Beijing, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6941-1612","authenticated-orcid":false,"given":"Guoxuan","family":"Chi","sequence":"additional","affiliation":[{"name":"Tsinghua University, Beijing, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5179-3202","authenticated-orcid":false,"given":"Yi","family":"Zhang","sequence":"additional","affiliation":[{"name":"Tsinghua University, Beijing, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2807-2597","authenticated-orcid":false,"given":"Xuan","family":"Ding","sequence":"additional","affiliation":[{"name":"Tsinghua University, Beijing, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4048-2684","authenticated-orcid":false,"given":"Zheng","family":"Yang","sequence":"additional","affiliation":[{"name":"Tsinghua University, Beijing, China"}]}],"member":"320","published-online":{"date-parts":[[2023,4,17]]},"reference":[{"key":"e_1_3_2_2_2","unstructured":"Sandeep Rao. 2020. 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