Tomlinson-Harashima Precoded Rate-Splitting With Stream Combiners for MU-MIMO Systems

This article introduces multiuser multiple-input multiple-output (MU-MIMO) architectures based on non-linear precoding and stream combining techniques using rate-splitting (RS), where the transmitter often has only partial knowledge of the channel state information (CSI). In contrast to existing wor...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on communications 2021-06, Vol.69 (6), p.3833-3845
Main Authors: Flores, Andre R., De Lamare, Rodrigo C., Clerckx, Bruno
Format: Article
Language:English
Subjects:
Codes
ergodic sum-rate
Mean square error methods
MIMO (control systems)
Multiuser MIMO
Precoding
rate-splitting
Receivers
Simulation
Splitting
Statistical analysis
Tomlinson-Harashima precoding
Transmitters
Uncertainty
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This article introduces multiuser multiple-input multiple-output (MU-MIMO) architectures based on non-linear precoding and stream combining techniques using rate-splitting (RS), where the transmitter often has only partial knowledge of the channel state information (CSI). In contrast to existing works, we consider deployments where the receivers may be equipped with multiple antennas. This allows us to employ linear combining techniques based on the Min-Max, the maximum ratio and the minimum mean-square error criteria along with Tomlinson-Harashima precoders (THP) for RS-based MU-MIMO systems to enhance the sum-rate performance. Moreover, we incorporate the Multi-Branch (MB) concept into the RS architecture to further improve the sum-rate performance. Closed-form expressions for the signal-to-interference-plus-noise ratio and the sum-rate at the receiver end are devised through statistical analysis. Simulation results show that the proposed RS-THP schemes achieve better performance than conventional linear and THP precoders.
ISSN:0090-6778
1558-0857
DOI:10.1109/TCOMM.2021.3065145