METHOD FOR REGULARIZED DETERMINATION OF THE OPTIMAL OPERATING FREQUENCY FOR IONOSPHERIC-SPATIAL PROPAGATION OF RADIO WAVES Russian patent published in 2023 - IPC G01S13/02 H04B7/22 

FIELD: radar systems.

SUBSTANCE: invention is intended to solve the problems of frequency adaptation of over-the-horizon radar systems (OHRS) to the non-stationarity of the ionosphere during ionospheric-spatial propagation of radio waves (ISPRW). The claimed method is carried out using cyclic reciprocating-sloping sounding with a period of (RSS/δ_D-probing) of ISPRW traces with δ_Dƒ “trial”-signals (RSS/δ_Dƒ -signals) displayed by the Dirac δ-function (approximately) - a quasi-monochromatic “on” signal » with a duration of Δt_trf, their subsequent standard radio reception and processing. The processing is carried out by analyzing, on the interval Δt_trf, the totality of the frequency characteristics of the received corresponding "trial" signals , forming their functional representation-model , then generating, on the basis of the obtained data, the reference signal (OOF-i) necessary for processing - , its delay for a period . As a result of processing, data are obtained on the relative indicator in the current interval from the i-th to (i + j)-th cycle of the RSS//δ_D -probing of the functional changes of the signals , reflecting the measure of compliance in this interval of the current operating frequency f_o with the predicted range Δf_r . On the basis of determine the values of the OOF that satisfies the criterion of non-exceeding the minimum-extremum limits of the total measurement errors of the received signals.

EFFECT: creation of a method for quickly determining the current values of the optimal operating frequency (OOF) in the case of non-stationary ionospheric-spatial propagation of radio waves in the general operating conditions, invariant to geography, seasonal-daily-solar cycles of the heliogeophysical conditions of the ionosphere, its dynamics and stochasticity.

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