Application of correlation receiver on the RFID marker localization signals

This paper deals with the application of correlation receiver and matched filter for the processing of the signals received from passive markers during their localization. The markers are single bit RFID transponders buried under the ground surface to mark the position of cables and pipes. A simulation model of locator - marker system created in the Multisim software is used to obtain the ideal (reference) signals from the markers. These signals are then used as basis function for calculation of cross-correlation with the real signals received from the markers and recorded by a digital oscilloscope for off-line processing. Moreover, from the ideal signal the impulse response needed for the matched filter design was derived and the matched filter was used to process the real recorded signals.