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The location fingerprint algorithm is used to study the offline acquisition and online positioning stages. The positioning flow of the location fingerprint algorithm is discussed, and the improvement of the location fingerprint algorithm is emphasized. The raw data of the RSSI (received signal strength indication) is preprocessed, which makes the location fingerprint data more effective and reliable, thus improving the positioning accuracy. Three different improvement strategies are proposed for the nearest neighbor classification algorithm: a balanced joint metric based on distance weighting and a compromise between the two. Then, in the experimental simulation, the positioning results and errors of the traditional KNN (k-nearest neighbor) algorithm and three improvement strategy algorithms are analyzed separately, and the effectiveness of the three improved strategy algorithms is verified by experiments.<\/jats:p>","DOI":"10.1186\/s13638-019-1601-3","type":"journal-article","created":{"date-parts":[[2019,12,17]],"date-time":"2019-12-17T19:03:02Z","timestamp":1576609382000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Research on Wi-Fi indoor positioning in a smart exhibition hall based on received signal strength indication"],"prefix":"10.1186","volume":"2019","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5033-7694","authenticated-orcid":false,"given":"Qing","family":"Yang","sequence":"first","affiliation":[]},{"given":"Shijue","family":"Zheng","sequence":"additional","affiliation":[]},{"given":"Ming","family":"Liu","sequence":"additional","affiliation":[]},{"given":"Yawen","family":"Zhang","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2019,12,17]]},"reference":[{"issue":"05","key":"1601_CR1","first-page":"21","volume":"2017","author":"C Jin","year":"2017","unstructured":"C. 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