METHOD OF DETECTING USEFUL SIGNAL ON BACKGROUND OF ADDITIVE INTERFERENCE Russian patent published in 2024 - IPC H04B1/10 G01S7/36 

FIELD: radio electronics.

SUBSTANCE: invention can be used when detecting useful signals with unknown phase or time delay in conditions of action of additive broadband non-Gaussian interference at any ratio of power of useful signal and interference, when distributions of instantaneous values of interference are unknown or vary in time, and the false alarm probability must be maintained at a given level. Method of detecting useful signal s(t) on background of additive noise consists in memorizing in memory of computing device sequence of discrete readings, obtained as a result of discretization of the process of changing current or voltage according to the sampling theorem, sorting the stored readings in ascending order to obtain a variation series, determining for each reading y_i its number R_i in a variation series, non-linear conversion of number R_i into a sequence of readings ƒ(R_i) by approximation of the variation series and calculation for each reading R_i of the approximation result in the form of reading ỹ_i, estimating the probability density of the counts W(ỹ_i) and using the dependence on ỹ_i found as a result of the estimation to calculate counts 1/W(ỹ_i), estimating for each count ỹ_i the nature of the slope of the found dependence, outputting as a result of nonlinear conversion ƒ(R_i) readings 1/W(ỹ_i) or −1/W(ỹ_i), corresponding to the positive and negative slope of the found relationship, calculating the maximum modulo value of the correlation function between the sequence ƒ(R_i) and the specified sequence of readings of the useful signal s(t_i), comparing with a given detection threshold and making a decision on the presence or absence of a useful signal at the output of the receiving path depending on the comparison result.

EFFECT: possibility of maintaining, in real conditions of receiving signals, the maximum possible probability of correct decision-making on the presence or absence of a useful signal in the observed process at the input of the receiving path.

1 cl, 4 dwg