3N1 L M, LIU Y, I.AU Y C. et al. LANDMARC:indoor location sensing using active RFII) [ J ].Wireless Networks, 2004 . 10(6) : 701-710.
4WILSON P, PRASHANTH D, A(iHAJAN H.Utilizing RFID signaling scheme for localization ofstationary objects and speed estimation of mobileobjects[C]. IEEE International Conference on RFID,2007. IEEE. 2007: 94-99.