Efficient Localization based on Imprecise Anchors in RFID System Observation Tag density effects 18164 Major region Minor region Detection Regions'radius 2 A higher tag density more tags to be identified 0.6 0.4 b 0.2 detection regions radius decreases 0 15.720.725.730.715.720.725.730.715.720.725.730.7(dBm) 2 tags/m 6 tags/m 10 tags/m Tag density Xiang Lu,Lei Xie,Yafeng Yin,Wei Wang,Baoliu Ye,Sanglu Lu State Key Laboratory for Novel Software Technology,Nanjing University,ChinaDetection Regions’ radius A higher tag density Observation 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 more tags to be identified detection regions radius decreases Tag density effects