Numerical Evaluation of the MU-MIMO Beamforming Performance with Channel Estimation
https://doi.org/10.55648/1998-6920-2024-18-1-109-120
Abstract
This paper presents the numerical evaluation of the ZF beamforming algorithm and DFT precoding using the LS channel estimation in the multiuser multiantenna (MU-MIMO) downlink system. The sum rate performance depending on a number of users are presented. The arising inter user correlation degrades the sum rate (spectral efficiency) performance of multiuser MIMO system especially in scenarios where the number of users is larger than the number of antennas at the BS. For MIMO channel simulation the QuaDRiGa channel model reflecting the real propagation conditions is used. The obtained performance of MU-MIMO ZF precoding in spatially correlated channel are compared with DFT precoding based on the empirical cumulative density function of the sum rate of multiple users. Numerical results show that the ZF precoder outperforms the DFT precoder in channel with less spatial correlation. The DFT precoder in spatially more correlated channel has advantage over ZF precoder.
About the Author
A. A. Kalachikov
Siberian State University of Telecommunications and Information Science (SibSUTIS)
Russian Federation
Russian Federation
Aleksander A. Kalachikov, Cand. of Sci. (Engineering), Lecturer of the Department of Radio Systems
630102, Novosibirsk, Kirov St. 86
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Review
For citations:
Kalachikov A.A. Numerical Evaluation of the MU-MIMO Beamforming Performance with Channel Estimation. The Herald of the Siberian State University of Telecommunications and Information Science. 2024;18(1):109-120. (In Russ.) https://doi.org/10.55648/1998-6920-2024-18-1-109-120
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