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Energy Efficiency Maximization for Heterogeneous Networks: A Joint Linear Precoder Design and Small-cell Switching-off Approach

Citation Author(s):
Long D. Nguyen, Trung Q. Duong, Diep N. Nguyen, Le-Nam Tran
Submitted by:
Yan (Lindsay) Sun
Last updated:
7 December 2016 - 10:02am
Document Type:
Document Year:
Presenters Name:
Long D. Nguyen



In heterogeneous networks (HetNets) system, the exploitation of small cells (SCs) will be enhanced spectral efficiency that means guarantee QoS and coverage area to user terminals. We propose a joint linear precoder designproblem to maximize the energy efficiency of the HetNet model. To tackle the cross-tier interference in the HetNets, we exploit zero-forcing precoding where the interference at the users is cancelled out by block diagonalization scheme. A novel group sparsity promoted as group Lasso is proposed using the weighted ℓ1 norm minimization, where the group sparsity pattern indicates those SCs that can be switched off and non-associated users. Simulation results show that the proposed algorithm outperforms many existing algorithms in terms of the total energy efficiency in the HetNets.

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Poster-GLOBALSIP2016 (Long D. Nguyen).pdf