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On the Receiver Performance in MU-MIMO Transmission in LTE

Authors:
Zijian Bai
Biljana Badic
Stanislaus Iwelski
Tobias Scholand
Rajarajan Balraj
Guido Bruck
Peter Jung

Keywords: LTE (Long Term Evolution), MU-MIMO (Multiuser Multiple Input Multiple Output), Max-Log-MAP (Maximum A Posteriori Probability), IRC (Interference Rejection Combiner)

Abstract:
Multiuser multiple-input multiple-output (MU-MIMO) transmission scheme has drawn most attentions during the recent development of Long Term Evolution (LTE) systems. Based on the feedback information of the downlink channel, evolved NodeB may achieve multiple accesses via MIMO technology in MU-MIMO Transmission Mode and allow user equipments to share resources in frequency and time domain. In this paper, we review several signal detectors and evaluate their performance in MU-MIMO transmission. The review work aims at the feasibility study of receivers in LTE systems. Different scenarios have been considered in the evaluation progress, e.g. low and high spatial correlation, real channel estimation and feedback delay. Simulation results show that benefits can be obtained by MU-MIMO transmission in the spatial correlated MIMO channel due to the higher condition number in the channel. Besides, reviewed receivers with the co-channel interference-aware signal detection yield good performance compared with single user MIMO receivers. The interference aware receivers are also robust in MU-MIMO transmission with imperfect working conditions, including channel estimation errors and precoding matrix index feedback delay.

Pages: 128 to 133

Copyright: Copyright (c) IARIA, 2011

Publication date: June 19, 2011

Published in: conference

ISSN: 2308-4219

ISBN: 978-1-61208-140-3

Location: Luxembourg City, Luxembourg

Dates: from June 19, 2011 to June 24, 2011