METHOD FOR BUILDING A BEAM FORMATION SYSTEM OF A RECEIVING DIGITAL ANTENNA ARRAY Russian patent published in 2022 - IPC G01S13/26 

FIELD: antenna equipment.

SUBSTANCE: area of application: invention relates to antenna equipment, namely, to methods for building a bema formation system of receiving digital antenna arrays (DAA) for radio communication and location systems. Substance: according to the method, an antenna panel is formed from M receiving modules with N channels in each, combined into L sub-arrays, an input signal is received in each channel of the receiving module by the antenna element, the input signal is amplified, if the receiving digital antenna array is made based on a superheterodyne circuit, the input signal frequency is converted, the input signal is filtered in a bandpass filter, sampled using analogue-to-digital conversion in the form of sequences of complex samples of signals of channels of the receiving modules. Rectangular complex signal matrices with a size N×N_st are formed from the sequences of complex samples of signals of channels of the receiving modules, two-dimensional symmetrical cosine transform of the complex signal matrices of the size N×N_st is performed in each receiving module, forming cosine spectra of complex signal matrices. Using the set basic functions, the corresponding matrix of the cosine spectrum of complex signal matrices is approximated by M′ output coefficients of each receiving module, the vectors of sub-array data are formed by combining M′ output coefficients of each receiving module transmitted consecutively via communication lines in L sub-arrays, a general data sequence with a length M·M′ is formed by combining the vectors of sub-array data transmitted consecutively via communication lines. The output coefficients of each receiving module are retrieved from the general data sequence, cosine spectra of complex signal matrices are formed by weighted summation of the basic functions with the output coefficients of each receiving module. Inverse symmetric cosine transform of the cosine spectrum of complex signal matrices is performed, and complex signal matrices with a size N×N_st are reconstructed. The required number of resulting antenna patterns is formed by weighted summation of the reconstructed complex signal matrices with a size N×N_st corresponding to the same quantisation times.

EFFECT: expanded operational capabilities of the DAA due to the increase in the number of formed beams with the maintained technically provided data transmission rate via communication lines.

1 cl, 10 dwg, 1 tbl