Low complexity beamfoming algorithm for multiuser MIMO systems

In order to reduce the inter-user interference in multiuser Multiple-Input Multiple-Output (MIMO) wireless communication systems, e.g., MIMO-Orthogonal Frequency Division Multiplexing (MIMO-OFDM) systems, it is often desirable to the complex pre-processing at the transmitter. In this paper, we propo...

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Bibliographic Details
Published in2009 International Conference on Wireless Communications & Signal Processing pp. 1 - 5
Main Authors Kechu Yi, Wengang Li, Yongjun Sun, Daixian Zhu
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.11.2009
Subjects
CCI
Computational complexity
Computational modeling
Feedforward systems
Frequency division multiplexing
Interference
Leak detection
linear beamforming
Matrix decomposition
MIMO
MMSE
Multi-user MIMO
Transmitters
Wireless communication
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Summary:In order to reduce the inter-user interference in multiuser Multiple-Input Multiple-Output (MIMO) wireless communication systems, e.g., MIMO-Orthogonal Frequency Division Multiplexing (MIMO-OFDM) systems, it is often desirable to the complex pre-processing at the transmitter. In this paper, we propose a multi-user beamfoming algorithm with sub-codebook selection. Based on the minimal leakage criterion, the codebook selection, limited feed-forward and MMSE detection are combined in the proposed algorithm. This avoids the complex channel matrix decomposition and inversion. Consequently, the computational complexity at the transmitter is significantly reduced. Simulation results show that the proposed algorithm performs better than existing beamforming algorithms.
ISBN:9781424448562
1424448565
DOI:10.1109/WCSP.2009.5371625