METHOD OF DETECTING DISTORTED PULSED SIGNALS Russian patent published in 2011 - IPC G01S7/292 

FIELD: physics.

SUBSTANCE: main detection channel is formed, comprising matched filtration of a signal with threshold decision making on its presence or absence according to a selected criterion. Two additional detection channels are formed, in which time instants τ_i, i=1,2 for reference readings are determined from the initial signal S(t) and the given model of frequency-selective distortions H(ω,t). Total values of the residual signal and noise U_sn(τ_i) at the output of the matched filter are measured in these readings and correlation coefficients r(τ_i) thereof are calculated. For known power of output noise P_n of the matched filter and given false alarm probability P_f, the decision threshold values are calculated using the formula where Φ^-1(·) is a function which is inverse to the probability interval. Said threshold values are set in additional detection channels. The resultant decision on the presence or absence of a signal is taken based on partial decisions on the main and additional channels according to the rule: a signal is detected if it is recorded in at least one of the partial channels.

EFFECT: high reliability of detecting a pulsed signal on the background of white noise under conditions of frequency-selective distortions with invariable energy and frequency-time resources of the communication channel.

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