Experimental and statistical analysis of blind spots for UHF RFID portal applications

The radiation field of a typical UHF RFID portal application was measured using our developed LabVIEW based automatic test platform. Path loss exponent and standard deviation of Log-normal shadowing model were obtained through MMSE criteria from measured data. Rician and Rayleigh empirical models were also introduced to predict the probability of blind spots. And fade margins were successfully compared for different blind spots probability.

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