Paper Info
Title
Distributed Block Diagonalization with Selective Zero Forcing for Multicell MU-MIMO Systems
Abstract
This letter proposes a distributed beamforming scheme based on block diagonalization (BD) for multicell multiuser multiple-input multiple-output (MU-MIMO) downlink systems. Although conventional BD can be directly extended to these systems in a distributed manner, it suffers from sum-rate degradation due to strict zero-forcing (ZF) constraints. To overcome this problem, we introduce a sum-rate maximization problem for BD, to find the optimal selection of ZF constraints. Then we propose a search algorithm to solve the problem in a distributed and heuristic manner. Simulation results show that the proposed scheme effectively finds a near-optimal solution and significantly improves simple extended BD such that it can provide higher sum rate than the conventional schemes.
Year
DOI
Venue
2014
10.1109/LSP.2014.2311459
IEEE Signal Process. Lett.
Keywords
Field
DocType
distributed block diagonalization,distributed beamforming,multiuser channels,selective zero-forcing constraints,bd,zf constraints,coordinated beamforming,cellular radio,multicell multiuser multiple-input multiple-output downlink systems,inter-cell interference,search problems,array signal processing,sum-rate maximization problem,search algorithm,mimo communication,multicell mu-mimo downlink systems,distributed beamforming scheme,sum-rate degradation,interference,mimo,optimization,vectors,degradation
Beamforming,Mathematical optimization,Heuristic,Multi-user MIMO,Cellular radio,Search algorithm,Control theory,Algorithm,Zero Forcing Equalizer,Mathematics,Maximization,Telecommunications link
Journal
Volume
Issue
ISSN
21
5
1070-9908
Citations 
PageRank 
References 
2
0.38
10
Authors
4
Name
Order
Citations
PageRank
Yo-Seb Jeon1549.12
Young-Jin Kim27810.27
Moonsik Min3355.74
Gi-Hong Im474467.58