Low-Complexity SC-FDE Techniques for Massive MIMO Schemes With Low-Resolution ADCs

Massive multiple-input multiple-output (mMIMO) systems are very important for 5G since they are one of the main enablers of the targeted huge capacity gains. On the other hand, the power consumption at the mobile terminals should be as low as possible, making single-carrier waveforms, such as single...

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Bibliographic Details
Published in:IEEE transactions on communications Vol. 67; no. 3; pp. 2368 - 2380
Main Authors: Guerreiro, Joao, Dinis, Rui, Montezuma, Paulo
Format: Journal Article
Language:English
Published: New York IEEE 01.03.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
ADC
Analog to digital conversion
Analog to digital converters
Antennas
Complexity
Complexity theory
Equalization
Frequency-domain analysis
Inversions
iterative receivers
Massive MIMO
MIMO communication
Nonlinear distortion
nonlinear distortion effects
Performance degradation
performance evaluation
Power consumption
Receivers
Receiving antennas
SC-FDE
Uplink
Waveforms
ISSN:0090-6778, 1558-0857
Online Access:Get full text
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Summary:Massive multiple-input multiple-output (mMIMO) systems are very important for 5G since they are one of the main enablers of the targeted huge capacity gains. On the other hand, the power consumption at the mobile terminals should be as low as possible, making single-carrier waveforms, such as single carrier with frequency-domain equalization (SC-FDE), particularly interesting, since the transmit signals can have a low peak-to-average power ratio (PAPR), allowing a highly efficient power amplification. However, the combination of mMIMO systems with SC-FDE modulations gives rise to implementation difficulties at the receiver side. On one hand, the equalization procedure should avoid matrix inversions, but this might lead to performance degradation. On the other hand, low-resolution analog-to-digital converters (ADCs) should be employed in each receive branch to reduce the implementation complexity, which might lead to severe nonlinear distortion effects. In this work, we study analytically the performance of mMIMO systems based on SC-FDE schemes employing low-complexity, iterative FDE receivers, and low-resolution ADCs. It is shown that the performance degradation associated to low-resolution ADCs can be tolerable if the number of receive antennas is larger than the number of transmit antennas, even when low-complexity FDE receivers are employed.
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ISSN:0090-6778
1558-0857
DOI:10.1109/TCOMM.2018.2881462