Abstract:
Self–adaptive band-pass filters are devices, which produce a band-pass filter
characteristic around a signal carrier frequency. In this paper a new model of these
filters is build based on [1].
This filter has the ability to select rapidly the carrier frequency from a modulated signal.
When a train of radio frequency pulses fully immersed in a high-level noise excites this
filter, it tracks the entire band and extracts the carrier frequency. The self-adaptive bandpass
filter operates as an ECCM (Electronic Counter-Countermeasures) technique
because it is trying to cancel out the effects of jammers especially those with barrage
jamming over the entire radar band, or spot jamming in which the noise power is
concentrated into the radar receiver bandwidth [2,3]. This ECCM technique is applied to
the RF section at the radar receiver.