| 摘要 |
FIELD: physics. ^ SUBSTANCE: received are interferences representing a mix of passive interferences (PI) and interfering signals in N periods of coherent set repetition, where NëÑ2 is integer. Generated are counts of complex envelope xi,k, where i=im,in 1ëñim,inëñN are numbers of two repetition periods of coherent set, k is the number of range element. Window of Nw range elements is generated. For each window range element, correlation of interferences is determined between im and in repetition periods of coherent set ^ , where is complex conjugate of , and interference power in im and in repetition periods of coherent set: , , in comparing obtained interference correlations zk of interference power , in window range elements. Window range elements containing interfering signals are excluded. Remaining window range elements are used to derive PI correlation estimations between im and in coherent set repetition periods and estimation of the mix of PI and noise in im and in coherent set repetition periods: , , wherefrom magnitude of PI interperiod correlation factor is determined after estimating interference correlations zk and interference power , . Interference correlation magnitudes Zk in window range elements are used to define factors of phase irregularity Kå(k) by the following formulas: ^ , ^ where ån is interference phase difference in im and in repetition periods, n-th range element, n=1,Ç,Nwëák, by comparing interference power , in window range elements. The following condition is checked for observance: ^ , where u() is unit jump function, d is factor smaller than unity and selected to make probability of observance of said conditions with interfering noises is insignificant, Nc is constant that may not exceed the number of interfering signals in range window. Nc window range elements with minimum phase irregularity factors Kå(k) and window range elements for which said condition are observed, are excluded. ^ EFFECT: higher accuracy of estimation. ^ 5 dwg |
