Impact of Transceiver Power Consumption on the Energy Efficiency of Zero-Forcing Detector in Massive MIMO Systems
Impact of Transceiver Power Consumption on the Energy Efficiency of Zero-Forcing Detector in Massive MIMO Systems
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DOI：
10.1109/tcomm.2014.2364188
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发表时间：
2014-01
影响因子：
8.3
通讯作者：
S. K. Mohammed
中科院分区：
文献类型：
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作者：
S. K. Mohammed
我们考虑收发器功率消耗对大规模MIMO系统上行链路中迫零（ZF）检测器的能量效率（EE）的影响，其中具有M个天线的基站（BS）与K个单天线用户终端（UT）进行相干通信。我们考虑的问题，最大化的EE相对于（M，K）的固定和频谱效率。通过分析，我们研究了系统参数对最佳EE的影响。系统参数包括用户的平均信道增益和功耗参数（PCP）（例如，由BS处的每个RF天线/接收机消耗的功率）。当平均用户信道增益高或者BS/UT设计是功率低效的时，我们的分析揭示了具有几个BS天线和单个用户是最佳的，即，非大规模MIMO机制。类似地，当信道增益小或者BS/UT设计是功率高效的时，具有较大的（M，K）是最佳的，即，大规模MIMO机制。严格的分析界限上的最佳EE提出这两个制度。研究了系统参数对最优EE的影响，并得出了一些有趣的见解。
We consider the impact of transceiver power consumption on the energy efficiency (EE) of the zero-forcing (ZF) detector in the uplink of massive MIMO systems, where a base station (BS) with M antennas communicates coherently with K single antenna user terminals (UTs). We consider the problem of maximizing the EE with respect to (M, K) for a fixed sum spectral efficiency. Through analysis, we study the impact of system parameters on the optimal EE. System parameters consists of the average channel gain to the users and the power consumption parameters (PCPs) (e.g., power consumed by each RF antenna/ receiver at BS). When the average user channel gain is high or else the BS/UT design is power inefficient, our analysis reveals that it is optimal to have a few BS antennas and a single user, i.e., nonmassive MIMO regime. Similarly, when the channel gain is small or else the BS/UT design is power efficient, it is optimal to have a larger (M, K), i.e., massive MIMO regime. Tight analytical bounds on the optimal EE are proposed for both these regimes. The impact of the system parameters on the optimal EE is studied, and several interesting insights are drawn.