DEVICE FOR LINEAR SUPPRESSION OF RETRANSMITTED NOISE Russian patent published in 2009 - IPC H04B1/00 

FIELD: radar-location.

SUBSTANCE: invention relates to radar-location and can be used for suppressing retransmitted noise. This technical outcome is achieved due to that, the device for linear suppression of retransmitted noise (RN) contains series connected amplitude detector, non-linear element, first multiplier, the input of which is connected to a bandpass limiter, the input of which is connected to the input of the amplitude detector. The device also contains series connected analogue-to-digital converter (ADC), first memory device, device for weighted processing, unit for every period fast Fourier transform (FFT), second memory device, noise detector, device for evaluating noise amplitude, third multiplier and a matched filter. The output of the noise detector is connected to the first input of the second multiplier, the second input of which is connected to the second output of the device for evaluating noise amplitude. The output of the second multiplier is connected to inputs of the amplitude detector and the bandpass limiter. The output of the first multiplier is connected to the first input of the third multiplier. The second input of the third multiplier is connected to the first output of the device for evaluating noise amplitude. The first output of the noise detector is connected to the input of the matched filter.

EFFECT: increased efficiency of suppressing several retransmitted signals (noise), with different delays and frequency shifting, created by an active jammer (AJ).

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