Adaptation of the transmitter - and reception properties of a rfid reader as a function of the electromagnetic environmental

摘要

The electronic identification system uses adjustable parameters for detection, emission and reception of Radio frequency reading signals. These parameters are adjusted as a function of the ambient electromagnetic noise, and also in response to the signals detected from this reference transponder. The Radio frequency electronic identification system includes a Radio frequency reader (10) connected to an antenna (20) which produced an interrogation field which is traversed by the transponders to be identified. The parameters for detection, emission and reception of the Radio frequency reader are adjusted as a function of the ambient electromagnetic noise. The process includes a stage of measuring the ambient electromagnetic noise, and a second stage of adjusting the parameters on the basis of this noise measurement. A further stage includes measuring the response from a reference transponder (30) placed, at least temporarily, in the interrogation field. The parameters may then be further adjusted in response to the signals detected from this reference transponder.