METHOD FOR SIMULTANEOUS MEASURING TWO ANGULAR OBJECTIVE COORDINATES IN REVIEW AMPLITUDE MONOPULSE RADAR SYSTEM WITH ANTENNA ARRAY AND DIGITAL SIGNAL PROCESSING Russian patent published in 2017 - IPC G01S13/44 H01Q21/00 G01S3/14 

FIELD: radio engineering, communication.

SUBSTANCE: modeling of the receiving and processing process is carried out before receiving the signals, taking into account the use of the antenna array with a rectangular aperture, in which factorization of the two-dimensional weighting function (WF) W(x,y)=W_x(x)W_y(y) is performed, excluding at this aperture form the value effect of one of the measured coordinates on the measurement process of the other coordinate in the azimuth and elevation planes and providing factorization of the two-dimensional directivity diagram (DD) of the channels F_m(ϑ,ϕ)=F_mθ(ϑ)F_mϕ(ϕ), where is the number of the partial channel reception, and the dependence of the two-dimensional DF characteristics (DFC) only from the measured coordinate S_ϑ(ϑ,ϕ,ϑ₀)=S_ϑ(ϑ,ϑ₀), S_ϕ(ϑ,ϕ,ϕ₀)=S_ϕ(ϕ,ϕ₀). One-dimensional WFs are the Hamming functions W_x(x)=0.08+0.92cos²(πx/2),-1≤x≤1 and W_y(y)=0.08+0.92cos²(yπ/2), -1≤y≤1, providing the sidelobe level not higher than minus 40 dB, and the working zone width of each angular coordinate not less than twice the width of the DD partial channel at half power, or the other WFs providing the sidelobe level not higher than the Hamming function, and not smaller than the size of the working zone, in the modeling process taking into account the weight functions, the antenna array parameters and the said factorization, the specific form of the functionsϑϑ F_1ϑ(ϑ)_, F_2ϑ(ϑ)_, F_3ϕ(ϕ), F_4ϕ(ϕ) and S_ϑ(ϑ,ϑ₀), S_ϕ(ϕ,ϕ₀) is determined, parametrically-dependent on the offset angles ϑ₀ and ϕ₀, the odd functions S_ϑ(ϑ_,ϑ₀) and S_ϕ(ϕ,ϕ₀) describing the one-dimensional DFCs resulting from factorization by the odd degrees of the angles ϑ and ϕ in the Maclaurin series, are expanded.

EFFECT: reducing calculation and the simultaneous measurement time of the two angular target coordinates with a high measurement accuracy, and an error of less than 1 percent the width of the directivity diagram.

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