METHOD FOR PROCESSING HF RANGE SIGNALS BY CASCADE OF ADAPTIVE FILTERS OF VARIOUS INERTIATION WITH COMMON FEEDBACK

摘要

The method of signal processing, which consists in the fact that the signal is processed by a broadband adaptive antenna system (ShAAS), operating according to the Wiener algorithm and the minimum mean square error criterion (ISCED), the output from the ShAAS is fed to a decision-making circuit, characterized in that the output signal is from a broadband the antenna system is processed by an additional filter controlled by a common signal from the ShAAS standard evaluation signal and an independent error signal of the second stage e, formed by the difference; the output signal from ShAAS is fed to an additional filter of a non-recursive structure with a recursive least squares algorithm; ShAAS adaptive algorithm controlled by an independent error signal of the first stage e generated by the difference y (k) should have an inertia higher than that of the additional filter, in which the stationarity interval L equal to 250 (symbolic premises) should be less than the Stationarity interval L of the broadband antenna of the system, equal to 600 (symbolic premises), i.e. L L, thereby providing conditions for different inertia of the cascades; the length of the delay line of the additional filter should be less than L - the length of the delay line of the ShAAS; equal to 5 and 19 symbolic premises, respectively; the signal converted from y (k) only after the additional filter is fed to the decision-making circuit, which generates a general signal estimate that provides a unifying control connection between the ShAAS and the additional filter, while the error signals e (k) and e (k) for ShAAS and the additional filter are different; a general assessment of the signal of the standard in the decision-making scheme for the adaptive filter system is developed according to a single characteristic criterion