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By employing H infinity filter, we show improved throughput performance of the system compared to that of previously proposed approaches (e.g., the Kalman filter and particle filter) based on the improved performance in tracking <jats:italic>n<\/jats:italic>. In this paper, we justify the superiority of the proposed approach in the terms of tracking performance, throughput performance, and computational complexity.<\/jats:p>","DOI":"10.1186\/1687-6180-2013-182","type":"journal-article","created":{"date-parts":[[2013,12,5]],"date-time":"2013-12-05T12:13:48Z","timestamp":1386245628000},"update-policy":"http:\/\/dx.doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Estimating the number of competing terminals without a state variation detector in wireless LAN"],"prefix":"10.1186","volume":"2013","author":[{"given":"Jaechan","family":"Lim","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Taejin","family":"Kim","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Daehyoung","family":"Hong","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2013,12,5]]},"reference":[{"key":"564_CR1","volume-title":"Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications","author":"IEEE","year":"1999","unstructured":"IEEE: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications. 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