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- W2898933251 abstract "This paper is concerned with the joint linear precoder design problem for the multiuser multiple-input multiple-output (MIMO) heterogeneous networks (HetNets) in which multiple femto base stations (FBSs) coexist with a macro base station (MBS). To tackle the inter-user interference in the macrocell, we exploit the blockdiagonalization scheme and then use the convex optimization to maximize the sum rate of the macrocell. The FBS transmission strategy is to maximize the sum-rate of femtocells subject to the transmitted power constraints per FBS and restrictions on the cross-tier interference to macro-users (MUs). Such a design problem is typically nonconvex, and, thus, challenging to find the FBS precoders. We reformulate the design problem of the FBS precoders as a d.c. (difference of convex functions) programming, and develop an efficient iterative algorithm to obtain the optimal precoders. Numerical simulation results show that the proposed algorithm outperforms the other methods in terms of the total sum-rate of the HetNet." @default.
- W2898933251 created "2018-11-09" @default.
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- W2898933251 date "2015-08-30" @default.
- W2898933251 modified "2023-09-26" @default.
- W2898933251 title "Optimal precoder designs for sum rate maximization in MIMO multiuser multicells" @default.
- W2898933251 doi "https://doi.org/10.32508/stdj.v18i3.890" @default.
- W2898933251 hasPublicationYear "2015" @default.
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