NDLI: Correlated UE impairments in ZF MU-MIMO transmissions

Content Provider	IEEE Xplore Digital Library
Author	Muller, M.K. Meidlinger, M. Rupp, M.
Copyright Year	2014
Description	Author affiliation: Inst. of Telecommun., Vienna Univ. of Technol., Vienna, Austria (Muller, M.K.; Meidlinger, M.; Rupp, M.)
Abstract	Applying Multiple Input Multiple Output (MIMO) techniques in wireless communication allows the parallel transmission of several data streams, thus increasing the throughput while leaving the transmit power unchanged. However, the maximum number of parallel streams is defined by the minimum of transmit- or receive-antennas, where in the downlink the User Equipment (UE) is most likely the limiting factor. To overcome this situation, multiple UEs can be served in parallel by Multi User (MU)-MIMO. Zero Forcing MU-MIMO is a low complex technique that tries to cancel the interference between the streams already at the Base Transceiver Station and that requires only one receive antenna per UE. However, due to various transmission impairments, there exists some residual interference degrading the performance. In this paper we illustrate the negative effects of correlated UEs by providing measurement and simulation results. The measurements are carried out with the Vienna MIMO Testbed and not only is the channel estimation performed by measurements, but also the data transmission is performed over physical channels.
Starting Page	317
Ending Page	320
File Size	724824
Page Count	4
File Format	PDF
ISBN	9781479914814
ISSN	2151870X
DOI	10.1109/SAM.2014.6882405
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-06-22
Publisher Place	Spain
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Signal to noise ratio Antenna measurements MIMO Channel estimation Interference Throughput Long Term Evolution MUMIMO LTE-A Measurement Zero Forcing
Content Type	Text
Resource Type	Article

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