BEAM FORMING METHOD Russian patent published in 2013 - IPC G01S3/80 

FIELD: radio engineering, communication.

SUBSTANCE: method involves receiving signals using a flat antenna array having M rows of antenna elements lying one above the other, wherein the antenna elements in one row have the same coordinates in the elevation plane; directional angles of maxima of beams are given in the azimuthal θ₁…θ_K and elevation φ₁…φ_K planes; weight coefficients are calculated for each receiving channel in the azimuthal plane and weight coefficients are calculated for each row of antenna elements in the elevation plane, where K is the number of formed beams; synchronous sampling and quantisation of each signal from the output of each antenna element is performed. The series of readings from the output of each digital-to-analogue converter is converted to a series of quadrature readings; filtration and decimation of the repetition frequency is performed K times. For each receiving channel, a series of weighted readings is formed by multiplying each quadrature reading by weight coefficients which correspond to coordinates of beams from the 1st to the K-th in the azimuthal plane. For each m-th row of antenna elements, a series with readings of partial beams of the beam pattern in the azimuthal plane is formed by summing weighted readings of receiving channels of each row, following with period K and associated with identical sampling moments. For each row, a series of weighted readings is formed by multiplying each reading, associated with the k-th beam, by weight coefficients which correspond to coordinates of beams in the elevation plane. The resultant series of readings of K beams of the beam pattern is formed by summing weighted readings of each row associated with the k-th beam associated with identical sampling moments.

EFFECT: eliminating the dependency of the size of equipment on the number of formed beams and forming a multi-beam pattern with independent beam control.

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