METHOD OF PROTECTING CHANNELS WITH FREQUENCY MANIPULATION FROM ARTIFICIAL RADIO INTERFERENCE Russian patent published in 2019 - IPC H04B1/10 

FIELD: radio engineering and communications.

SUBSTANCE: invention relates to radio engineering and can be used for protection against structural (imitation) interference of radio channels using signals with two-position frequency manipulation (FM-2). To achieve the technical result, an additional detection channel is arranged to form a sequence of pulses with detected moments and duration of difference between information and interfering signals. Besides, reference information signals are generated by the reference signal generator, which are successively compared to the received implementation in the first and second signal subtraction units. Additional detection channel is used to connect the required reference "zero" or "one" information signal. If there is no interference, the received signal is directly transmitted to the demodulation unit through the first output of the key circuit.

EFFECT: high reliability owing to direct comparison of a received input realization containing a useful signal with reference information signals generated by a reference signal generator prior to detection operations thereof.

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