METHOD OF THE OBJECTS RADIO-FREQUENCY IDENTIFICATION AND SYSTEM FOR ITS IMPLEMENTATION Russian patent published in 2018 - IPC H03H9/42 

FIELD: radio engineering; acoustics.

SUBSTANCE: group of inventions relates to the field of the objects radio frequency identification using the surface acoustic waves (SAWs), and can be used in the access control systems establishment. In the method and system, performing the passive RFID tag on the SAWs radio sounding by irradiation with the harmonic signal, interrogation signals encoding by RFID tag on the SAW by means of elementary symbols phase modulation, by RF mark on the SAW response signals generation containing the RFID tag identification code, and their reemission towards the transceiver path, radio sounding is performed by the radio pulses packet, containing at least one pair of pulses, one of the pulses has carrier frequency f₁, corresponding to the frequency band Δf₁ central frequency, in which the RFID tag generates the identification code first part, and the other pulse has frequency f₂, corresponding to the frequency band Δf₂ central frequency, in which the RFID tag generates the identification code second part. Time interval between pulses must be at least t_i=t_d+t_c+2t_s, where t_d is the initial signal delay in the RFID tag; t_c is the RFID tag response signal code part duration; t_s is the signal from the transceiver path to the RFID tag propagation time. Pulses order in the pair is set randomly. In the claimed method, in addition to the decoding, obtaining the each response signal spectral amplitude characteristics, by which the RFID tag encoded response signals amplitude spectra maxima ratios values are calculated and comparing these values with the true RFID tag response validity criteria.

EFFECT: technical result consists in the using passive tags on SAW monitoring systems reliability improvement, and in the safety level improvement.

4 cl, 4 dwg