Short description of frequency-temporal features of OFDM of signals, determining the list of possible identification signs is given. The cross-correlation method of estimation of basic parameters of difficult signals is offered in the conditions of a priori vagueness, based on the cyclic prefix structure of the combined signal within the limits of interval of mo dulation and carried out from data of digital selections of minimum quality. For determination of list of workings orthogonal sub bearings frequencies the method of linear algebra, providing enhanceable exactness of estimations at a min imum of calculable expenses, is offered. Advantages of the offered method are rotined as compared to the traditional methods of spectral structure of signals.
radiomonitoring, OFDM signals, digital treatment, cross-correlation, system of algebraic equalizations, frequency-temporal parameters