METHOD FOR ESTIMATING THE EFFECTIVE SCATTERING CROSS-SECTION OF AN AERODYNAMIC TARGET Russian patent published in 2022 - IPC G01S7/41 G01S13/00 

FIELD: radio location.

SUBSTANCE: invention relates to radar and can be used in systems for estimating the effective scattering cross-section (ESCS) of an aerodynamic target. In the claimed method, when estimating the ESCS of the target by the maximum likelihood functional for each j^th hypothesis of the ESCS of the target, the likelihood functional is approximated by two sections: the first section, where the amplitude of the target signal with noise x_i is greater than or equal to the detection threshold h, by Rayleigh distribution with the calculated dispersion of the amplitude of the target signal with noise D_ij, and on the second section, where the amplitude of the target signal x_i is less than the detection threshold h, by an equally probable law with a probability density of wherein D_ij is calculated by a known expression as a function of the target tracked by range and angle, the hypothesis of the ESCS value σ_j, the gain coefficient of the transceiver antenna in the direction toward the target, the power of the transmitter, the gain coefficient of the receiver k_Gi for the tracked range according to the known dependence of the gain coefficient of the receiver on the adjustment voltage supplied to the receiver from the automatic gain control system.

EFFECT: reduction in the difference between the maximum tracking range of a fluctuating target and the maximum range whereto the ESCS estimates of the target are near true and do not require compensation for the offset connected with the dependence on the signal-to-noise ratio.

1 cl, 6 dwg