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Low-Complexity User Selection for Rate Maximization in MIMO Broadcast Channels with Downlink Beamforming
Joint Authors
Silva, Adão
Gameiro, Atílio
Castañeda, Eduardo
Samano-Robles, Ramiro
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-01-16
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Medicine
Information Technology and Computer Science
Abstract EN
We present in this work a low-complexity algorithm to solve the sum rate maximization problem in multiuser MIMO broadcast channels with downlink beamforming.
Our approach decouples the user selection problem from the resource allocation problem and its main goal is to create a set of quasiorthogonal users.
The proposed algorithm exploits physical metrics of the wireless channels that can be easily computed in such a way that a null space projection power can be approximated efficiently.
Based on the derived metrics we present a mathematical model that describes the dynamics of the user selection process which renders the user selection problem into an integer linear program.
Numerical results show that our approach is highly efficient to form groups of quasiorthogonal users when compared to previously proposed algorithms in the literature.
Our user selection algorithm achieves a large portion of the optimum user selection sum rate (90%) for a moderate number of active users.
American Psychological Association (APA)
Castañeda, Eduardo& Silva, Adão& Samano-Robles, Ramiro& Gameiro, Atílio. 2014. Low-Complexity User Selection for Rate Maximization in MIMO Broadcast Channels with Downlink Beamforming. The Scientific World Journal،Vol. 2014, no. 2014, pp.1-13.
https://search.emarefa.net/detail/BIM-1051406
Modern Language Association (MLA)
Castañeda, Eduardo…[et al.]. Low-Complexity User Selection for Rate Maximization in MIMO Broadcast Channels with Downlink Beamforming. The Scientific World Journal No. 2014 (2014), pp.1-13.
https://search.emarefa.net/detail/BIM-1051406
American Medical Association (AMA)
Castañeda, Eduardo& Silva, Adão& Samano-Robles, Ramiro& Gameiro, Atílio. Low-Complexity User Selection for Rate Maximization in MIMO Broadcast Channels with Downlink Beamforming. The Scientific World Journal. 2014. Vol. 2014, no. 2014, pp.1-13.
https://search.emarefa.net/detail/BIM-1051406
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1051406