Optimal BD-ZF precoder for multi-user MIMO downlink transmission

For multi-user MIMO downlink transmission, a block-diagonal zero-forcing (BD-ZF) precoder is usually used to suppress multi-user interference. In the case of a large number of transmitted antennas installed at the base station, there exists a larger nullspace than the precoder requires. An optimal B...

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Bibliographic Details
Published in:Electronics letters Vol. 51; no. 14; pp. 1121 - 1123
Main Authors: Yao, Rugui, Nan, Huani, Xu, Juan, Li, Geng
Format: Journal Article
Language:English
Published: The Institution of Engineering and Technology 09.07.2015
Subjects:
Antennas
base station
Blocking
block‐diagonal zero‐forcing precoder
determinant maximisation technique
Determinants
Gain
Interference
interference suppression
Mathematical models
MIMO communication
MUI suppression
multiple‐input multiple‐output transmission
multiuser interference suppression
multiuser MIMO downlink transmission
optimal BD‐ZF precoder
optimisation
Optimization
precoding
throughput improvement
Wireless communications
multiple-input multiple-output transmission
interference suppression
determinants
determinant maximisation technique
multiuser interference suppression
precoding
MUI suppression
optimal BD-ZF precoder
BS
optimisation
block-diagonal zero-forcing precoder
multiuser MIMO downlink transmission
base station
MIMO communication
throughput improvement
ISSN:0013-5194, 1350-911X, 1350-911X
Online Access:Get full text
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Summary:For multi-user MIMO downlink transmission, a block-diagonal zero-forcing (BD-ZF) precoder is usually used to suppress multi-user interference. In the case of a large number of transmitted antennas installed at the base station, there exists a larger nullspace than the precoder requires. An optimal BD-ZF precoder is developed to maximise throughput using the determinant maximisation technique. It helps to gather all gain for the transmission of each user. Numerical results validate that the precoder obtains throughput improvement.
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ISSN:0013-5194
1350-911X
1350-911X
DOI:10.1049/el.2015.0517