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MIMO technologies for the wireless future

G. Bauch, A. Alexiou
2008 2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications  
Another source of diversity -inherent to wireless systems-is that of the multiuser diversity. Multiuser (MU) MIMO algorithms combine both MIMO gains with multiuser diversity benefits.  ...  multiplexing gain.  ...  True spatial multiplexing with linear precoding and a variable number of spatial streams (layers) is also supported in 3GPP-LTE.  ... 
doi:10.1109/pimrc.2008.4699969 dblp:conf/pimrc/BauchA08 fatcat:24gb5o2ubbdblowfl7gqpbh2wa

AirSync: Enabling Distributed Multiuser MIMO with Full Spatial Multiplexing [article]

Horia Vlad Balan, Ryan Rogalin, Antonios Michaloliakos, Konstantinos Psounis, Giuseppe Caire
2012 arXiv   pre-print
In this paper we propose AirSync, a novel scheme which provides not only time but also phase synchronization, thus enabling distributed MIMO with full spatial multiplexing gains.  ...  To the best of our knowledge, AirSync offers the first ever realization of the full multiuser MIMO gain, namely the ability to increase the number of wireless clients linearly with the number of jointly  ...  While this solution achieves a part of the potential spatial multiplexing gain, in order to realize the full spatial multiplexing requires tight phase synchronization between the jointly precoded transmitters  ... 
arXiv:1205.6862v2 fatcat:2y45tzq2hjfm3ma4kudritjx6m

Ergodic Capacity of LTE Downlink Multiuser MIMO Systems

Z. Lin, B. Vucetic, J. Mao
2008 2008 IEEE International Conference on Communications  
Compared with the systems without precoding, linear precoding can improve the outage probability.  ...  Two Spatial Division Multiplexing (SDM) multiuser MIMO schemes in the context of LTE downlink transmission are investigated. They are Single User (SU) and Multi-user (MU) MIMO schemes.  ...  ACKNOWLEDGEMENT The authors would like to acknowledge the ARC and Girling Watson funds for the support of this work.  ... 
doi:10.1109/icc.2008.629 dblp:conf/icc/LinVM08 fatcat:fjwi75hhb5hudferxgi57amfoy

Precoding for Multiuser Orthogonal Space-Time Block-Coded OFDM: Mean or Covariance Feedback?

Y. Fu, W. A. Krzymien, C. Tellambura
2007 2007 IEEE International Conference on Communications  
This paper presents precoding design for errorrate improvement in closed-loop multiuser orthogonal space-time block-coded (OSTBC) multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing  ...  We derive adaptive linear precoding and non-linear Tomlinson-Harashima precoding (THP) over a transmit-antenna-correlated, frequency-selective fading MIMO channel with estimation errors and feedback delay  ...  ACKNOWLEDGEMENT The authors gratefully acknowledge funding for this work provided by the Natural Sciences and Engineering Research Council (NSERC) of Canada, Alberta Informatics Circle of Research Excellence  ... 
doi:10.1109/icc.2007.704 dblp:conf/icc/FuKT07 fatcat:kzmiefq2jnb6tmpxisd7lzegc4

Shifting the MIMO Paradigm

David Gesbert, Marios Kountouris, Robert W. Heath, Chan-byoung Chae, Thomas Salzer
2007 IEEE Signal Processing Magazine  
Point-to-point (single-user) MIMO communication promises large gains for both channel capacity and reliability, essentially via the use of space-time codes (diversity gain oriented) combined with stream  ...  quality despite not requiring full awareness of the MIMO capability.  ...  In addition to yielding MIMO multiplexing gains without the need for MIMO user terminals, the multiuser setup presents the advantage of being immune with respect to the possible illbehavior of the propagation  ... 
doi:10.1109/msp.2007.904815 fatcat:nodvrub6mfbw7pod7iwga6live

Literature Survey for Transceiver Design in MIMO and OFDM Systems

Raja Muthalagu, Department of EEE, BITS, Pilani, Dubai Campus, Dubai, UAE
2018 Journal of Communications  
In order to exploit the benefits of MIMO and OFDM systems, precoding and/or joint precoding and decoding design for MIMO and OFDM systems is of great meaning and has been widely studied.  ...  ., Multiple-Input Multiple-Output (MIMO) systems), and a combination of multipath and frequency diversity (e.g., Orthogonal Frequency Division Multiplexing (OFDM) systems).  ...  For uplink and downlink MU-MIMO systems, a joint linear transceiver design with the minimum TMSE has been examined in [80, 81] .  ... 
doi:10.12720/jcm.13.2.45-59 fatcat:3klhlx46lbdj5fr4q3xtcwv6p4

Achieving high data rates in a distributed MIMO system

Horia Vlad Balan, Ryan Rogalin, Antonios Michaloliakos, Konstantinos Psounis, Giuseppe Caire
2012 Proceedings of the 18th annual international conference on Mobile computing and networking - Mobicom '12  
To the best of our knowledge, this is the first time that the theoretical high data rates of multiuser MIMO systems have been showcased in a real world distributed MIMO testbed.  ...  In the full channel state information scenario, we implement Zero-Forcing Beamforming (ZFBF) and Tomlinson-Harashima Precoding (THP) which is provably near-optimal in high SNR conditions.  ...  This condition is necessary to implement full CSIT precoding schemes (in particular THP and ZFBF) for distributed multiuser MIMO.  ... 
doi:10.1145/2348543.2348552 dblp:conf/mobicom/BalanRMPC12 fatcat:5m2gjkn2wbe4fcxe3eurmf7ypq

AirSync: Enabling Distributed Multiuser MIMO With Full Spatial Multiplexing

Horia Vlad Balan, Ryan Rogalin, Antonios Michaloliakos, Konstantinos Psounis, Giuseppe Caire
2013 IEEE/ACM Transactions on Networking  
In this paper we propose AirSync, a novel scheme which provides not only time but also phase synchronization, thus enabling distributed MIMO with full spatial multiplexing gains.  ...  To the best of our knowledge, AirSync offers the first ever realization of the full multiuser MIMO gain, namely the ability to increase the number of wireless clients linearly with the number of jointly  ...  It is evident that the testbed achieves the full MIMO multiplexing gain.  ... 
doi:10.1109/tnet.2012.2230449 fatcat:7scahekbezer7j457v7xfio6by

A Technique for Multiuser and Intercarrier Interference Reduction in Multiple-Antenna Multiuser OFDM Downlink

Yu Fu, Witold Krzymien, Chintha Tellambura
2007 IEEE Transactions on Wireless Communications  
We propose a two-stage precoder/equalizer to suppress intercarrier interference (ICI) and multiuser interference (MUI) in downlink multiuser OFDM with multiple transmit antennas.  ...  Index Terms-Multiuser OFDM, multiple antennas, intercarrier interference (ICI), multiuser interference (MUI), Tomlinson-Harashima precoding (THP), minimum mean-square error (MMSE) equalization.  ...  Fig. 3 . 3 BER with the proposed precoder/equalizer and full-CSIT THP as a function of the SNR for different values of the normalized frequency offset for 64-subcarrier 4-QAM 4-user MIMO OFDM with perfect  ... 
doi:10.1109/twc.2007.051034 fatcat:fdjdk2jknzb5njodvlwdpid2zm

Differential beamspace MIMO for high-dimensional multiuser communication

John H. Brady, Akbar M. Sayeed
2015 2015 IEEE Global Conference on Signal and Information Processing (GlobalSIP)  
DB-MIMO enables linear quasi-coherent interference suppression between multiple spatially multiplexed data streams in conjunction with differential transmission.  ...  We focus on downlink multiuser systems in which an access point equipped with a high-dimensional antenna array serves multiple singleantenna mobile stations (MSs).  ...  The large number of MIMO degrees of freedom can be exploited for a number of critical capabilities, including: higher antenna/beamforming gain [1] - [4] ; higher spatial multiplexing gain; and highly  ... 
doi:10.1109/globalsip.2015.7418207 dblp:conf/globalsip/BradyS15 fatcat:tplrp3lzbfakvcqbldap3q3sfi

Beamspace MIMO for high-dimensional multiuser communication at millimeter-wave frequencies

Akbar Sayeed, John Brady
2013 2013 IEEE Global Communications Conference (GLOBECOM)  
Thus, the proposed reduced-complexity multiuser precoders provide a near-optimal route for achieving multi-Gigabit/s sum rates in mm-wave MU-MIMO networks with the lowest transceiver complexity.  ...  In this paper we propose and analyze the sum capacity of several linear, reducedcomplexity multiuser MIMO (MU-MIMO) precoders that exploit the concept of beamspace MIMO (B-MIMO) communicationmultiplexing  ...  We develop and compare the capacity of three linear, reduced-complexity B-MIMO precoders for multiuser MIMO (MU-MIMO) links: the matched-filter (MF), zero-forcing (ZF) and Wiener filter (WF) precoders.  ... 
doi:10.1109/glocom.2013.6831645 dblp:conf/globecom/SayeedB13 fatcat:gh53lcigvrgvjctdpsvfzmp3aa

On MU-MIMO Precoding Techniques for WiMAX [chapter]

Elsadig Saeid, Varun Jeoti, Brahim B.
2013 Selected Topics in WiMAX  
The chapter opens with the basic preliminaries on MIMO channel characterization and MIMO gains in section . This is followed by theoretical overview of precoding for MU-MIMO channel in section .  ...  This promising additional gain achieved by using Multiple Input Multiple Output MIMO technology has rejuvenated the field of wireless communication.  ...  ., "Linear Precoding for Multiuser MIMO-OFDM Systems," in IEEE International Conference on Communications, , pp. -. [ ] V. Sharma and S.  ... 
doi:10.5772/56034 fatcat:lbwpmlz4xneern4j572e6ivcmi

Transmit Selection Diversity for Unitary Precoded Multiuser Spatial Multiplexing Systems With Linear Receivers

Runhua Chen, Robert W. Heath, Jeffrey G. Andrews
2007 IEEE Transactions on Signal Processing  
Multiuser spatial multiplexing is a downlink transmission technique that uses linear transmit precoding to multiplex multiple users and pre-cancel inter-user interference.  ...  Extensive results are available for single-user precoder design, e.g. [17]- [24] . Relatively fewer results exist on multiuser MIMO precoding.  ...  TRANSMIT PRECODING FOR INTERFERENCE CANCELLATION The goal of multiuser MIMO downlink transmission is to achieve high data rates by using spatial division multiple access (SDMA) to serve multiple users  ... 
doi:10.1109/tsp.2006.887147 fatcat:psiaimiesfav5ebz7os5znhu2a

Multiuser MIMO Downlink: Multiplexing Gain Without Free Channel Information

Umer Salim, Dirk Slock
2008 2008 IEEE Globecom Workshops  
If the users have data to transmit in the uplink (UL) direction, with no extra burden of training, full multiplexing gain of the multiple-access channel (MAC) can be achieved.  ...  A multiuser MIMO system is considered with no initial assumption of channel state information (CSI) at any of the receivers or the BS transmitter.  ...  Zero forcing precoding, one of the simplest linear precoding strategy, has been shown to behave quite optimally at asymptotically high values of SNR and achieves the full DOF of a coherent downlink channel  ... 
doi:10.1109/glocomw.2008.ecp.90 fatcat:ikafcwp4bnchljnirue2klbodi

Power Efficient MIMO Techniques for 3GPP LTE and Beyond

K. C. Beh, C. Han, M. Nicolaou, S. Armour, A. Doufexi
2009 2009 IEEE 70th Vehicular Technology Conference Fall  
Different MIMO transmission and precoding schemes proposed for LTE, achieving varying degrees of multiuser diversity are examined.  ...  Environmental issues and the need to reduce energy consumption for lowering operating costs have pushed power efficiency to become one of the major issues of current research in the field of wireless networks  ...  Marios Nicolaou also wishes to thank Toshiba Research Europe Limited for its financial support.  ... 
doi:10.1109/vetecf.2009.5379033 dblp:conf/vtc/BehHNAD09 fatcat:pjt7rjlpn5cotgr2rsp44j7cky
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