The Indirect method of obtaining Estimates of the Parameters of Radio Signals of covert means of obtaining Information
Олег Барабаш
Abstract
The article considers the method of indirect determination of the parameters of the signals of the means of covert receipt of information.Attention is paid to random signals.Because their presence gives the chance to record the fact of the existence of a signal of means of secret reception of the information.Random signals of different power are considered by the statistical method.Modern statistical theory of radio signal detection considers the measuring device as a filter that extracts useful information (information about the parameters we need) from the whole mixture of signal and interference.An accurate mathematical description of radio signals is usually impossible.Therefore, an indirect method of estimating radio signals is proposed in order to detect the signals of the means of secretly obtaining information.The method of comparing the signals obtained during radio monitoring is based on the fact that the output signal at any point, including estimates of maximum likelihood, can be approximated in a polynomial with a finite number of members.This allows you to update the input signal, based on the measurement of the corresponding values of the parameters of the output signal and their derivatives, which is within the evaluation range.