Vol. 15, no.3, 2023
РусскийEnglish
RADIOELECTRONICS
EXTENDED ORTHOGONAL FEEDBACK PRECODING FOR SPATIAL MULTIPLEXING SYSTEMS
Mikhail G. Bakulin, Vitaly B. Kreyndelin
Moscow Technical University of Communications and Informatics, http://mtuci.ru/
Moscow 111024, Russian Federation
E-mail: m.g.bakulin@gmail.com, vitkrend@gmail.com
Andrey A. Reznev
Scientific-Technical Center "Atlas", http://www.stcnet.ru/
Moscow 127018, Russian Federation
E-mail: andrey.reznev@gmail.com
Received May 19, 2023, peer-reviewed May 26, 2023, accepted June 02, 2023
Abstract: Various methods of generating of space-time codes and algebraic structures for increasing noise immunity of MIMO communication systems with a large number of transmitting and receiving antennas are considered. The possibility of generation of an orthogonal precoding matrix in MIMO systems depending on changing reception conditions in a radio channel using feedback from a transmitter to a receiver is shown. It is obtained that to transmit such a precoding matrix in MIMO systems with 4×4, 8×8, 16×16 antenna configurations, feedback is required with the ability to transmit only 2 bits on the reverse link at an energy gain of 1.5 dB ... 2.5 dB compared to an open loop system. The precoding matrices obtained in the article and their formation algorithms can be used in the development of new MIMO mobile communication systems.
Keywords: MIMO, spatial multiplexing, algebraic codes, precoding, Golden code, maximum likelihood, ML, MMSE
UDC 621.396
RENSIT, 2023, 15(1):235-242e DOI: 10.17725/rensit.2023.15.235
Full-text electronic version of this article - web site http://en.rensit.ru/vypuski/article/507/15(3)235-242e.pdf