The energy consumption of wireless networks is a growing concern. In massive MIMO systems, which are being increasingly deployed as part of the 5G roll-out, the power amplifiers in the base stations have a large impact in terms of power demands. Most of the current massive MIMO precoders are designed to minimize the transmit power. However, the efficiency of the power amplifiers depend on their operating regime with respect to their saturation regime, and the consumed power proves to be non-linearly related to the transmit power. Power consumption-based equivalents of maximum ratio transmission, zero-forcing, and regularized zero-forcing precoders are therefore proposed. We show how the structure of the solutions radically changes. While all antennas should be active in order to minimize the transmit power, we find on the contrary that a smaller number of antennas should be activated if the objective is the power consumed by the power amplifiers.
翻译:无线网络的能源消耗日益引起人们的关注。在作为5G推出的一部分而正在越来越多地部署的大型MIMO系统中,基站的电力放大器在电力需求方面影响很大。目前大部分大型IMO预译器设计为最大限度地减少传输电源。然而,电力放大器的效率取决于其饱和系统的操作机制,而所消耗的电能则证明与传输电源没有线性关系。因此,提出了以最大比率传输、零推进和固定化零推进预译器等量的电力消耗量等值。我们展示了解决方案的结构如何发生根本变化。所有天线都应活跃起来,以尽量减少传输电源,但我们发现相反的是,如果目标是电放大器所消耗的电,则应激活较少数量的天线。