NDLI: Preference-based unified criterion in virtual MIMO systems

Content Provider	IET Digital Library
Author	Jia, Boqi Hu, Honglin Zeng, Yu Xu, Tianheng Yang, Yang
Abstract	Virtual multiple-input multiple-output (V-MIMO) is an advanced technology in uplink systems, and a well-designed user pairing and resource allocation scheme in V-MIMO systems can effectively exploit multi-user diversity to yield a significant performance gain. Recently, main attention has been devoted to the crucial user pairing issue with consideration of three key metrics, i.e. spectrum efficiency, energy efficiency and fairness. In this study, the authors investigate the unified tradeoff among all the three metrics for V-MIMO systems with user pairing and resource allocation. They first formulate the three key metrics in a united form and derive a straightforward unified criterion based on the user-specific preference to depict system performances. Through discussing several preference-based cases, they observe that a portion of spectrum efficiency is considered redundantly. Thus, a modified unified criterion is proposed to remove the partial redundancy provided by spectrum efficiency contribution to the objective function. Based on the two unified criteria, they propose a user pairing scheme in flat fading channels and a joint user pairing and resource allocation scheme in frequency-selective fading channels to balance the tradeoff flexibly. Simulation results show that, compared with existing schemes, the proposed scheme achieves a dynamical tradeoff among spectrum efficiency, energy efficiency and fairness.
Starting Page	1332
Ending Page	1341
Page Count	10
ISSN	17518628
Volume Number	12
e-ISSN	17518636
Issue Number	Issue 11, Jul (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/12/11
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2017.1227
Journal	IET Communications
Publisher Date	2018-03-21
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Advanced Technology Crucial User Pairing Issue Dynamic Tradeoff Energy Efficiency Fading Channel Fairness Frequency-selective Fading Channel Joint User Pairing MIMO Communication Modified Unified Criterion Multiuser Diversity Preference-based Cases Radio Link And Equipment Resource Allocation Resource Allocation Scheme Significant Performance Gain Spectrum Efficiency Contribution Straightforward Unified Criterion System Performances Uplink System User-specific Preference V-MIMO System Virtual MIMO System Virtual Multiple-input Multiple-output
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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