Adaptive noise cancellation for two frequency radars using frequency doubling passive RF tags

Abstract

The use of adaptive noise cancellation technique was explored in order to separate sources of motion for a two frequency Doppler radar system. Simulations and experiments were performed. The reference signal was obtained from a harmonic radar system using passive harmonic tags. The tag signal was effectively cancelled from data simultaneously obtained from a 2.45 GHz Doppler radar, facilitating the monitoring of un-tagged source of motion and providing reliable information about both motions.