Hybrid beamforming for downlink multiuser millimetre wave MIMO-OFDM systems

In this study, the authors consider multi-user millimetre wave (mmWave) multiple-input multiple-output (MIMO) downlink communications for multi-carrier scenarios, e.g. orthogonal frequency-division multiplexing (OFDM) a common analogue precoder and combiner for the transmitter and receiver to maximi...

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Bibliographic Details
Published in:IET communications Vol. 13; no. 11; pp. 1557 - 1564
Main Authors: Zhang, Didi, Wang, Yafeng, Li, Xuehua, Xiang, Wei
Format: Journal Article
Language:English
Published: The Institution of Engineering and Technology 16.07.2019
Subjects:
array signal processing
block diagonal method
channel average
channel estimation
channel information
combiner
common analogue precoder
computational complexity
digital precoder
downlink multiuser
fully digital precoding method
hybrid beamforming
main challenge
MIMO communication
multicarrier MIMO systems
multiple‐input multiple‐output downlink communications
multiuser millimetre wave
OFDM modulation
orthogonal frequency‐division multiplexing
precoding
receiver
Research Article
spectral efficiency
subcarrier
third‐order tensor
transmitter
wave MIMO‐OFDM systems
block diagonal method
downlink multiuser
main challenge
channel information
hybrid beamforming
digital precoder
precoding
channel average
multiuser millimetre wave
spectral efficiency
orthogonal frequency-division multiplexing
OFDM modulation
MIMO communication
transmitter
array signal processing
receiver
multicarrier MIMO systems
common analogue precoder
fully digital precoding method
multiple-input multiple-output downlink communications
combiner
third-order tensor
wave MIMO-OFDM systems
channel estimation
subcarrier
computational complexity
ISSN:1751-8628, 1751-8636
Online Access:Get full text
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Summary:In this study, the authors consider multi-user millimetre wave (mmWave) multiple-input multiple-output (MIMO) downlink communications for multi-carrier scenarios, e.g. orthogonal frequency-division multiplexing (OFDM) a common analogue precoder and combiner for the transmitter and receiver to maximise spectral efficiency is the main challenge for multi-carrier MIMO systems, they propose two methods to solve this problem. The first method designs the analogue precoder and combiner based on the channel average of all subcarriers, which helps reduce computational complexity. Moreover, the channels of all subcarriers can be viewed as a third-order tensor, and the second method is based on tensor unfolding, which makes full use of the channel information of all subcarriers. When the common analogue precoder and combiner are fixed, they consider designing a digital precoder to maximise the signal-to-leakage-plus-noise ratio of each user in every subcarrier, which leads to closed-form solutions compared with the block diagonal method. Simulation results demonstrate that the performance of the proposed methods is close to that of the fully digital precoding method, and increasing the number of RF transceiver chains helps improve the performance of the proposed methods.
ISSN:1751-8628
1751-8636
DOI:10.1049/iet-com.2018.6061