INTERFERENCE SUPPRESSION METHOD Russian patent published in 2011 - IPC G01S7/36 

FIELD: radio engineering.

SUBSTANCE: in suppression method of interference representing passive interference (PI) with unknown parametres, from received signals and interference in N repetition periods of coherent block, where N≥2, there formed are references of complex envelope x_i,k, where i - number of repetition period of coherent block, 1≤i≤N, k - number of range element; as per references of complex envelope in window of N_w range elements enveloping k element there formed are evaluations of correlation parametres of interference, which are used to determine weight ratios of rejector filter to the input of which there supplied are references of complex envelope x_ik; at that, references of complex envelope x_i,k are also supplied to M additional rejector filters the weight ratios of which are obtained by using the evaluations of correlation parametres of interference in the appropriate M windows of the size which is less than N_w, and consisting of range elements enveloping k element; then, in window from N_p range elements enveloping k element, where N_p is chosen on the basis of allowable PI suppression reduction, there measured is interference power at outputs of additional rejector filters, where j=1,…,M - number of additional rejector filter, and interference power at the output of the above rejector filter; r filter is chosen from additional rejector filters, where 1≤r≤M with minimum evaluation of interference power at its output after that, the following condition is checked: where d≤1 - coefficient the value of which is determined with allowable reduction of suppression of PI which are homogeneous as to range, depending on the fact whether this condition is met or not; mixture of signals and suppressed interference is picked up from the output either of r additional rejector filter or the above rejector filter.

EFFECT: improving suppression of passive interference which is non-homogeneous as to range.

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