FIELD: radio engineering.;SUBSTANCE: method consists in conversion of coded interrogation signals to signals corresponding to them and involves separation of group of pulses with the specified amplitude-time distribution from interrogation signal received in the form of a set of pulses chaotically distributed as to time intervals of sending of the specified duration; before group of pulses with the specified amplitude-time distribution is separated from interrogation signal, there separated are joint "two-amplitude" pulses formed from interrogation signal and interference into two pulses spread as to pulse time with various amplitude, and for that purpose mutual correlation function of received signal and reference pulses is calculated; calculation result is compared to the specified threshold and when it exceeds the specified threshold, value of amplitude of interrogation signals is fixed and pulse is shaped with duration equal to distance between input signal readouts. Interrogation radar includes decoding device of interrogation signals, which includes analogue-to-digital converter, pulse detection unit, multi-channel decoder, which are in series connected to receiving device; at that, pulse detection unit includes computer of mutual correlation function of received signal and reference pulse, threshold device and pulse shaper.;EFFECT: providing high decoding reliability of received interrogation signals together with interference at any time moment.;2 cl, 2 dwg
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