Downlink multiuser MIMO scheduling in LTE Advanced systems

In this paper, we consider the downlink (DL) multiuser (MU) multi-input-multi-output (MIMO) scheduling for the fourth generation LTE Advanced (LTE-A) cellular networks. The DL MU-MIMO scheduling can be posed as an optimization problem to maximize the weighted sum rate subject to several practical co...

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Bibliographic Details
Published in2012 IEEE International Conference on Communications (ICC) pp. 4484 - 4488
Main Authors Guosen Yue, Prasad, N., Rangarajan, S.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.06.2012
Subjects
Greedy algorithms
MIMO
Resource management
Scheduling
Scheduling algorithms
Signal to noise ratio
Vectors
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Summary:In this paper, we consider the downlink (DL) multiuser (MU) multi-input-multi-output (MIMO) scheduling for the fourth generation LTE Advanced (LTE-A) cellular networks. The DL MU-MIMO scheduling can be posed as an optimization problem to maximize the weighted sum rate subject to several practical constraints, such as a per-user rank constraint. Due to these constraints finding the optimal solution becomes an NP-hard problem. Consequently, we propose an efficient albeit sub-optimal rank balancing approach that enforces the peruser rank constraint and present several rank balancing based scheduling algorithms. We show that the proposed algorithms are guaranteed to yield constant-factor approximations. Simulation results demonstrate that the proposed rank balancing based scheduling algorithms outperform other competing schemes over various relevant system scenarios.
ISBN:9781457720529
1457720523
ISSN:1550-3607
DOI:10.1109/ICC.2012.6364507