Power Minimization for Cell-Free Massive MIMO

被引：0
|
作者：
Zhang, Yao [1 ]
Cao, Haotong [1 ]
Zhou, Meng [1 ]
Li, Yan [1 ]
Yang, Longxiang [1 ]
机构：
[1] Nanjing Univ Posts & Telecommun, Wireless Commun Key Lab Jiangsu Prov, Nanjing 210003, Peoples R China
来源：
2019 IEEE INTERNATIONAL CONFERENCE ON CONSUMER ELECTRONICS - TAIWAN (ICCE-TW) | 2019年
关键词：
Cell-free massive MIMO; power minimization; QoS constraint; conjugate beamforming; zero-forcing;
D O I：
10.1109/icce-tw46550.2019.8991915
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper, we investigate the total power minimization problem for the downlink cell-free massive multiple-input multiple-output (mMIMO) system, subjecting to the users' quality-of-service (QoS) constraint. Specifically, the total power consists of circuit power, data transmission power, and back-haul power. Two precoding schemes are considered in this paper, namely conjugate beamforming (CB) and zero-forcing (ZF) method. It is proved that the power minimization problems for both precoders can be reformulated as the second-order-cone programming (SOCP) and hence, are easily determined. Simulation results indicate that, in the low QoS SE regime, the total power required by ZF precoder is larger than that of CB case. However, the superiority of CB precoder in power saving vanishes in both medium and high QoS SE regimes.
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页数：2
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