Issues related to the features of multi-channel signal processing based on superresolution methods using a system with a quasi-ring arrangement of receivers are considered. The output characteristic is compared using the classical processing method (radiation pattern is formed) and the superresolution method (direction-finding relief is formed). As a basis of the signal processing algorithm, the property of 2π-periodicity of the angular dependence of the directivity characteristics of the receivers and the signal power is used. The issues of increasing the resolution in the angular direction of the received signals were studied during multichannel processing in a receiver system with a ring arrangement. The possibility of a significant improvement in resolution during the transition from the classical method to the method of superresolution is shown.

Keywords: multichannel processing, radiation patterns, Hamiltonian cycle, angular distribution, annular and quasi-ring antenna array, directivity characteristics, synthesis of amplitude-phase distribution

An algorithm for the synthesis of the amplitude-phase distribution in quasi-circular antenna array for a given amplitude-phase radiation pattern is considered in the article. Selection of amplitude-phase radiation pattern as the set is due to the ability to use the most simple method of amplitude-phase synthesis of amplitude-phase radiation pattern. The predetermined amplitude-phase radiation pattern parameters (width of main lobe, level of side-lobes) are selected on the basis of physically realizable amplitude-phase pattern. The amplitude-phase radiation pattern may be formed using an circular or linear antenna. The solution is reduced to the formation of an overdetermined system of linear algebraic equations for the unknown complex amplitudes of the excitation currents in quasi-circular antenna array. The coefficients of the unknowns in the system of equations are amplitude-phase radiation pattern each of emitters for certain number of angular. The number of lines exceeds the number of emitters in a part of the antenna. The question of the possibility of saving the amplitude-phase radiation pattern parameters in the transition from the ring to the quasi-circular antenna array are discussed. Achieved mean square difference between the ring and the amplitude-phase distribution pattern quasi-circular antennas does not exceed 0,001.

Keywords: ring and quasi-circular antenna array, capability of pattern, amplitude-phase distribution synthesis