FIELD: physics, communications.
SUBSTANCE: invention relates to communication engineering. The system uses controlled band-pass filters to filter a received signal. A control circuit generates a control signal to control the filter band-pass. If intensity of the received signal is above a first threshold device, a wider band-pass can be used for the filters. If the received signal is below a second threshold value, the control circuit generates a control signal to adjust the filters to a narrower band-pass. The band-pass of the filters can also vary depending on presence of a source of narrow-band radio interference (malicious interference). The adjustable delay unit guarantees constant group delay between all possible filter configurations.
EFFECT: increased noise-immunity.
45 cl, 10 dwg
