标题：Some Issues on WSN Localization Based on MLE
作者：Wang, Lei; Wang, Xiaopeng; Du, Xiaotong
作者机构：[Wang, Lei; Wang, Xiaopeng; Du, Xiaotong] Shandong Univ, Sch Control Sci & Engn, Jinan 250100, Shandong, Peoples R China.
会议名称：8th World Congress on Intelligent Control and Automation (WCICA)
会议日期：JUL 06-09, 2010
来源：2010 8TH WORLD CONGRESS ON INTELLIGENT CONTROL AND AUTOMATION (WCICA)
关键词：WSN(Wireless Sensor Networks); Localization; Ranging; RSSI(Received; Signal Strength Indicator); MLE(Maximum Likelihood Estimation)
摘要：Node localization plays a key role in the validity of WSN applications. To improve the precision of WSN node localization, A localization algorithm is studied which is based on Maximum Likelihood Estimation (MLE). A new RSSI ranging model is proposed that is depicted by two empirical models. The optimal number of reference WSN nodes for localization are studied. The test results show that the error of localization is less than 1m with the new model while the reference node number is 5.