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Table 2 Summary of signal variability (statistics per position middle line)

From: Enhancing RFID indoor localization with cellular technologies

Tech. Statistic \( {\sigma}_{\Pr \mathrm{x}}^{\mathrm{static}} \) (dB) \( {\sigma}_{\Pr \mathrm{x}}^{\mathrm{adjacent}} \) (dB) \( {N}_{\mathrm{IDSrx}}^{\mathrm{static}} \) (number) \( {\sigma}_{\mathrm{IDSrx}}^{\mathrm{adjacent}} \) (ratio)
RFID Mean 0.7 3.2 28.7 1.4
Median 0.5 3.2 29 1.0
UMTS Mean 0.5 2.6 1.7 0.7
Median 0.2 2.5 1.0 0.7
GSM Mean 0.6 6.0 1.1 0.3
Median 0.0 6.6 1.0 0.0