... simulation results and the experimental results. And we extend theerror bound to the multiple recognition range case.204 Advanced Radio Frequency Identification Design and Applications Fig. ... 0.6661(16,16,16) 7.0 53 0.4781(17,17,17) 7 .38 9 0 .31 04(18,18,18) 7.497 0.1407(19,19,19) 7 .36 7 0.0754(20,20,20) 6.9 53 0.0209(21,21,21) 6.872 0.00 93 (22,22,22) 7.049 0.0025( 23, 23, 23) 6.922 0.0007(24,24,24) ... 23dBm. The improvement of position202 Advanced Radio Frequency Identification Design and Applications pseudo table of the tag positions. Choi et al. (2008) augmented the ultra sonic sensors and...