Energy Efficiency Maximization with Per-Antenna Power Constraints for Heterogeneous Networks

摘要: This paper considers energy efficiency (EE) optimization in downlink multiple-input multiple-output (MIMO) heterogeneous networks (HetNets) which one macro base station (MBS) and multiple small cell stations (SBSs) communicate with MIMO users. The primary objective is to design the precoders maximize network EE under constraints on per-antenna per-base-station transmit power acceptable interference levels at each user cell. problem results nonconvex fractional program whose optimal solutions cannot be found directly. In this paper, relationship between achievable data rates minimum mean square error (MMSE) adopted reformulate into amenable one. Then, an iterative algorithm based Dinklebach block coordinate ascent (BCA) methods employed for finding precoders. We conduct numerical simulations examine performance of considered HetNets.