DEVICE FOR SUPPRESSING NARROW-BAND INTERFERENCE Russian patent published in 2010 - IPC H04B1/10 

FIELD: physics, radio.

SUBSTANCE: invention relates to radio engineering and can be used mainly in duplex control radio channels and in packet radio networks for operational-command communication in position areas under influence of narrowband interference. The device includes in each of n lines of the unit for protection from narrowband interference, a corresponding electronic switch (10₁-10_n), as well as a first (11) and a second (12) time selector whose outputs are connected to corresponding inputs of an OR circuit (13). The first input of each electronic switch (10₁-10_n) is connected to the output of the corresponding element for suppressing narrowband interference (6₁-6_n), and the output is the corresponding output of the unit for protection from narrowband interference (2). Outputs of the first (11) and second (12) time selectors are connected to the second output of a matched filter (4). The output of the OR circuit (13) is connected to the second inputs of the first (10₁) and second (10₂), as well as the last two (10_n-1 and 10_n) electronic switches. The output of the second time selector (12) is connected to second inputs of the third (10₃) and (n-2)-th (10_n-2) electronic switches.

EFFECT: increased efficiency of using the allocated frequency band, which enables increase of the signal-to-noise ratio.

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