Efficient uplink transmission in multiuser MIMO systems using uplink-downlink duality and hybrid optimization

Author

Khalid, Farhan ; Speidel, Joachim

Author_Institution

Inst. of Telecommun., Univ. of Stuttgart, Stuttgart, Germany

fYear

2013

fDate

16-18 Oct. 2013

Firstpage

256

Lastpage

260

Abstract

We propose an efficient multiuser MIMO (MU-MIMO) uplink transmission scheme based on a two-stage iterative joint optimization process in the dual downlink, followed by an uplink transformation. The hybrid optimization consists of multiuser interference (MUI) mitigation complemented by sum mean-square error (SMSE) minimization under a sum-power constraint to enhance the average bit-error rate (BER) performance in the MU-MIMO uplink. The proposed algorithm is capable of providing high diversity gain when the transmitters are equipped with multiple antennas and converges exceptionally fast, requiring only a few iterations to achieve its maximum performance potential. We also consider a codebook based transmission mechanism for practical implementation of the proposed scheme.

Keywords

MIMO communication; error statistics; mean square error methods; multi-access systems; BER; bit-error rate; hybrid optimization; multiuser MIMO systems; multiuser interference mitigation; sum mean-square error minimization; two-stage iterative joint optimization process; uplink transformation; uplink transmission; uplink-downlink duality; Bit error rate; Downlink; MIMO; Nickel; Optimization; Uplink; Vectors; Multiuser MIMO; diversity; hybrid optimization; uplink-downlink duality;

fLanguage

English

Publisher

ieee

Conference_Titel

Advanced Technologies for Communications (ATC), 2013 International Conference on

Conference_Location

Ho Chi Minh City

ISSN

2162-1020

Print_ISBN

978-1-4799-1086-1

Type

conf

DOI

10.1109/ATC.2013.6698117

Filename

6698117