首页|Spectral-Energy Efficiency Tradeoff in Mixed-ADC Massive MIMO Uplink with Imperfect CSI

Spectral-Energy Efficiency Tradeoff in Mixed-ADC Massive MIMO Uplink with Imperfect CSI

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An uplink multi-user massive Multi-input multi-output (MIMO) system is considered with a mixed Analog-to-digital converter (ADC) architecture under imperfect Channel state information (CSI). A closed-form approximation for the Spectral efficiency (SE) is derived for a general mixed ADC structure with any resolution profile. To achieve a balance between the SE and receive Energy efficiency (EE) of the system, the ADC resolution profile optimization problem that maximizes a linear combination of the SE and the Base station (BS) receive power consumption is formulated. An algorithm based on gradient search is proposed whose complexity is linear in the number of BS antennas. Numerical results verify that the proposed ADC resolution design largely outperforms the two-level structure especially in the lower SE region and provides more choices than the uniform-ADC architecture for resolving the SE-EE tradeoff.

Massive MIMOMixed-ADC receiverSpectral-energy efficiency tradeoffGradient searchImperfect channel state information

DING Qingfeng、JING Yindi

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School of Electrical and Automation Engineering, East China Jiaotong University, Nanchang 330013, China

Department of Electrical and Computer Engineering, University of Alberta, Edmonton T6G 1H9, Canada

National Natural Science Foundation of ChinaJiangxi Province Science FoundationScientific Foundation of Jiangxi Educational Committee

6150118620171BAB202001GJJ180307

2019

10.1049/cje.2019.02.010

中国电子杂志(英文版)

中国电子杂志(英文版)

CSTPCDCSCDSCIEI
ISSN：1022-4653
年,卷(期)：2019.28(3)
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