A Low-Complexity Multiuser Adaptive Modulation Scheme for Massive MIMO Systems

A novel low-complexity multiuser adaptive modulation (MAM) scheme is proposed for uplink massive multiple input and multiple output systems with zero-forcing detection, which requires only slow-varying large-scale shadowing information for the users. Closed-form expressions are derived for the avera...

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Bibliographic Details
Published inIEEE signal processing letters Vol. 23; no. 10; pp. 1464 - 1468
Main Authors Zhou, Yuehao, Zhong, Caijun, Jin, Shi, Huang, Yongming, Zhang, Zhaoyang
Format Journal Article
LanguageEnglish
Published New York IEEE 01.10.2016
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Adaptive modulation
Adaptive systems
Fading channels
massive MIMO
MIMO
Modulation
Power control
Shadow mapping
Signal to noise ratio
zero-forcing
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Summary:A novel low-complexity multiuser adaptive modulation (MAM) scheme is proposed for uplink massive multiple input and multiple output systems with zero-forcing detection, which requires only slow-varying large-scale shadowing information for the users. Closed-form expressions are derived for the average spectral efficiency (ASE) and bit error outage (BEO). In addition, for MAM with joint power control, optimal power adaptation strategy and switching thresholds are obtained. Compared with the conventional fast adaptive modulation, which requires fast-varying small-scale fading information, the proposed MAM scheme achieves similar ASE performance with slight increase in BEO.
ISSN:1070-9908
1558-2361
DOI:10.1109/LSP.2016.2601932