Investigation of the orthogonality of antenna array beams
https://doi.org/10.55648/1998-6920-2025-19-3-76-94
Abstract
Multiple input – multiple output (MIMO) technology, thanks to the beamforming and beam direction control (beamforming) system, is a key technology that has a significant impact on improving the spectral efficiency of fifth-generation (5G) wireless communication systems. The main idea of this technology is spatial separation of users, simultaneous transmission of symbols of several users on one element of the time-frequency resource due to their spatial multiplexing. Due to the possibility of repeated use of the same time-frequency resources in different beams of a common antenna system, the efficiency of using the frequency band increases. However, the widespread use of the same time-frequency resources in neighboring beams leads to interference between neighboring beams (interbeam interference) in the antenna system. Estimating the level of this interference is one of the most important procedures in spatial planning of modern wireless networks. This article proposes a technique for determining the influence of the direction and width of neighboring beams on the level of interference between these beams, which makes it possible to reduce the level of such interference by dividing the beam pattern into fractions. A new method of arranging adjacent beams is also proposed, which makes it possible to reduce the level of interference between the beams. Based on the conducted research, the gain from the proposed technique in the transmission rate in the beam has been determined.
About the Authors
Isfandiyor Vakosovich Aliev
Siberian State University of Telecommunications and Informatics
Russian Federation
postgraduate student of the Department of Digital Television and Radio Broadcasting and Radio Communication Systems at SibSUTI
Russian Federation
postgraduate student of the Department of Digital Television and Radio Broadcasting and Radio Communication Systems at SibSUTI
Vladimir Ivanovich Nosov
Siberian State University of Telecommunications and Informatics
Russian Federation
TsTRV and SRS, professor, 5119-0176
Russian Federation
TsTRV and SRS, professor, 5119-0176
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For citations:
Aliev I.V., Nosov V.I. Investigation of the orthogonality of antenna array beams. The Herald of the Siberian State University of Telecommunications and Information Science. 2025;19(3):76-94. (In Russ.) https://doi.org/10.55648/1998-6920-2025-19-3-76-94
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