Efficient Localization based on Imprecise Anchors in RFID System Scenario Conventional localization mainly leverage precise anchor nodes to help compute the user's location. Anchor nodes are intentionally deployed for localization. Y-avis OReference Tag LANDMARC Target Tag Winels Notrks 2004.Ni et al Challenges: Difficult to find or deploy enough anchor nodes for accurate localization. The k-nearest neighbor in RSSI (k=4) X-avis Xiang Lu,Lei Xie,Yafeng Yin,Wei Wang,Baoliu Ye,Sanglu Lu State Key Laboratory for Novel Software Technology,Nanjing University,ChinaScenario Xiang Lu, Lei Xie, Yafeng Yin, Wei Wang, Baoliu Ye, Sanglu Lu State Key Laboratory for Novel Software Technology, Nanjing University, China Efficient Localization based on Imprecise Anchors in RFID System Conventional localization mainly leverage precise anchor nodes to help compute the user’s location. LANDMARC Wireless Networks 2004, Ni et al VIRE ICPP 2007, Zhao et al Challenges: Difficult to find or deploy enough anchor nodes for accurate localization. Anchor nodes are intentionally deployed for localization