METHOD OF DETECTING AND SELECTING RADIO SIGNALS BASED ON COMPLEX POLARIZATION FEATURE Russian patent published in 2025 - IPC G01S7/02 G01S13/04 

FIELD: radio engineering.

SUBSTANCE: invention relates to radio engineering and can be used in radio monitoring systems for detecting and selecting radio signals with known polarization parameters, as well as in passive polarization radar for detecting and selecting radar signals. Claimed method is based on the radio signal two orthogonal components reception, their quadrature components calculation, the received signal polarization parameters calculation, which are the ellipticity angle and the polarization ellipse inclination angle, and making decision on presence of selected signal, with polarization parameters α₀ and γ₀, based on integrated use of polarization parameters when meeting conditions α₀ ∈ [−α'_thr; α'_thr], α'_lh ≤ α ≤ α'_uh and γ'_lh ≤ γ ≤ γ'_uh, or by value of ellipticity angle when meeting conditions α₀ ∉ [−α'_thr; α'_thr] and α_lh ≤ α ≤ α_uh. At that, boundaries of detection intervals α_lh; α_uh; γ'_lh; γ'_uh; α'_lh and α'_uh are determined using the Neyman-Pearson criterion with P_fa(α) = P_{fa_req} and

EFFECT: high probability of correct detection of a radio signal with a fixed false alarm probability, due to further calculation and taking into account the inclination angle of the polarization ellipse of the received radio signal when making a decision on presence of a selected signal.

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