Peak-pulse detection error probability for RFID saw-tags with pulse position coding

We discuss the code reading error probability (EP) in the radio frequency identification (RFID) surface acoustic wave tags with pulse position coding and peak-pulse detection. EP is found in the most general form assuming M groups of codes with N slots each and allowing individual signal-to-noise ratios (SNRs) in each slot. We show that if the RFID tag is designed such that the spurious responses are attenuated on more than 20 dB below On-pulses, then EP can be achieved at the level of 10^-8 (one false per 10⁸ readings) with SNR >; 17 dB for any reasonable M and N.