METHOD FOR SPATIAL INTERFERENCE COMPENSATION USING INFORMATION ABOUT THE DIRECTION TO THE SIGNAL SOURCE Russian patent published in 2023 - IPC H01Q21/00 

FIELD: navigation equipment.

SUBSTANCE: invention relates to the spatial selection of signals and can be used when receiving navigation signals by the navigation equipment of the consumer of the global navigation satellite system (GNSS NEC) under the influence of intentional interference. A method for spatial interference compensation using information about the direction to the signal source using an adaptive antenna array, based on the information about the direction to the signal source , coming from an external source, the formation of the vector (α₁,θ₁)=[s₁, s₂, …, s_K)] with elements

,

where ρ_k and ϕ_k are the polar coordinates of the k-th antenna element of the antenna array, λ is the wavelength of the signal (interference) that enters the weight calculation unit and is used there when calculating the values of the weight coefficients of the antenna array, which ensure that the orientation of the main beam of the diagram is maintained directivity of the antenna array in the direction of the source of the useful signal in the process of its adaptation to the interference environment, which is carried out in three stages: at the first stage, the level of the sum of the signal and interference in the channels of the antenna array is estimated by

,

where 0<μ_s<1, xk(t), k=1, 2, ..., K are the components of the vector X(t)=[x₁, x₂, …, x_K]^T of the signal and noise at the outputs of the antenna elements, "T" - transposition operator; at the second stage, the calculation of the weight vector of the antenna array W(t)=[w₁, w₂, …, w_K]^T with elements w_k(t)=w_k(t-1)-μy(t)x_k(t)s_k, k=1, 2, …, K, μ=μ₀/A(t), 0<μ₀<1; y(t)=X^Н(t)W(t) is the sum of the signal and noise at the output of the antenna array, "H" is the operator of complex conjugation and transposition; at the third stage, the components of the vector W(t) are normalized as follows: W(t+1)=W(t)-I*[-1], where I is a unit column vector.

EFFECT: providing interference compensation using information about the direction to the source of the useful signal.

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