FIELD: physics.
SUBSTANCE: invention relates to radiolocation and can be used to detect pulsed radio signals in conditions of narrow-band active interference. According to the method of non-destructive detection of pulsed radio signals, the frequencies, powers and frequency bands of narrow-band interference and the filtering matched to the input signal are estimated. According to the output signal of the matched filter, the time points of taking the information and reference samples are selected in which the corresponding values of the signal-interference realizations are measured, and the value of the correlation coefficient of the resulting interference between the information and reference samples is calculated. On the opposite edge of the output signal of the matched filter, the time points for taking additional information and reference samples are selected, in which the corresponding values of signal-interference realizations are measured, and the value of the correlation coefficient of the narrow-band interference between the additional information and reference samples is calculated. Based on the measured signal-interference realizations in the information and reference samples and the calculated values of the correlation coefficients of the resulting interference between the corresponding information and reference samples, the resulting value is calculated, which is compared with a predetermined threshold value, and according to the selected criterion, a decision is made on the presence or absence of a signal at the detector input.
EFFECT: invention is aimed at increasing the noise immunity of detecting pulsed radio signals in conditions of narrow-band interference and white noise without destroying the output signal of the detector with unchanged energy and frequency-time resources of the radio channel.
1 cl, 2 dwg
