Localization and Tracking Related Work [Localization]L.Yang,Y.Chen,X.Li,C.Xiao,M.Li,and Y.Liu,Tagoram:Real- time Tracking of Mobile RFID Tags to High Precision Using COTS Devices,in Proc.of ACM MOBICOM,2014. [Localization]J.Wang and D.Katabi,Dude,where's my card?:RFID Positioning That Works with Multipath and Non-Line of Sight,in Proc.of ACM S/GCOMM, 2013. [Localization]Y.Ma,N.Selby and F.Adib,Minding the Billions:Ultra-wideband Localization for Deployed RFID Tags,in Proc.of ACM MOBICOM,2017. [Tracking]J.Wang,D.Vasisht,and D.Katabi,RF-IDraw:Virtual Touch Screen in the Air Using RF Signals,in Proc.of ACM SIGCOMM,2014. [Trackingl L.Shangguan,Z.Zhou and K.Jamieson,Enabling Gesture-based Interactions with Objects,in Proc.of ACM MobiSys,2017.Localization and Tracking Related Work [Localization] L. Yang, Y. Chen, X. Li, C. Xiao, M. Li, and Y. Liu, Tagoram: Real￾time Tracking of Mobile RFID Tags to High Precision Using COTS Devices, in Proc. of ACM MOBICOM, 2014. [Localization] J. Wang and D.Katabi, Dude, where’s my card?: RFID Positioning That Works with Multipath and Non-Line of Sight, in Proc. of ACM SIGCOMM, 2013. [Localization] Y. Ma, N. Selby and F. Adib, Minding the Billions: Ultra-wideband Localization for Deployed RFID Tags, in Proc. of ACM MOBICOM, 2017. [Tracking] J. Wang, D. Vasisht, and D. Katabi, RF-IDraw: Virtual Touch Screen in the Air Using RF Signals, in Proc. of ACM SIGCOMM, 2014. [Tracking] L. Shangguan, Z. Zhou and K. Jamieson, Enabling Gesture-based Interactions with Objects, in Proc. of ACM MobiSys, 2017