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Geometry of the 3-user MIMO interference channel [article]

Guy Bresler, Dustin Cartwright, David Tse
2011 arXiv   pre-print
It turns out that, just as for the 3-user parallel interference channel BT09, the length of alignment paths captures the essence of the problem.  ...  This paper studies vector space interference alignment for the three-user MIMO interference channel with no time or frequency diversity.  ...  [2] for the multiple-input multiple-output (MIMO) X channel and subsequently by Cadambe and Jafar [3] in the context of the K-user interference channel (IC), the basic idea is to align multiple interfering  ... 
arXiv:1110.5092v1 fatcat:3mcpe5nlpfh3baf2fjmhtga2ea

A Stochastic Analysis of Network MIMO Systems

Kianoush Hosseini, Wei Yu, Raviraj S. Adve
2016 IEEE Transactions on Signal Processing  
Along with the inevitable out-of-cluster interference, we show that the per-BS ergodic sum rate of a network MIMO system does not approach that of an isolated cell even at unrealistically large cluster  ...  This expression allows us to obtain the optimal loading factor, i.e., the ratio between the number of scheduled users and the number of BS antennas, that maximizes the per-BS ergodic sum rate.  ...  These distributions make further analysis using stochastic geometry feasible. 2) Analysis of Network MIMO Using Stochastic Geometry: Based on the obtained signal and inter-cluster interference power distributions  ... 
doi:10.1109/tsp.2016.2552502 fatcat:ws6jhswiongxdo46n3c7kmnbfm

Generalized MMSE beamforming for multicell MIMO systems with random user geometry and channel feedback latency

Illsoo Sohn, Hyoungjoo Lee, Kwang Bok Lee
2014 EURASIP Journal on Wireless Communications and Networking  
The closed-form beamforming expression gives insights on how the geometry of users and channel feedback latency affect the construction of optimal beamforming vectors.  ...  Our realistic multicell MIMO system model captures (i) different average SNRs of users due to random geometrical distribution of users within cells, (ii) channel feedback latency due to air propagation  ...  ., Ltd. and the Brain Korea 21 Plus Project in 2014.  ... 
doi:10.1186/1687-1499-2014-86 fatcat:udsjdcneivfwxmhhkwdb4uidrm

Optimizing large-scale MIMO cellular downlink: Multiplexing, diversity, or interference nulling?

Kianoush Hosseini, Wei Yu, Raviraj S. Adve
2015 2015 53rd Annual Allerton Conference on Communication, Control, and Computing (Allerton)  
null interference at a chosen subset of out-of-cell users.  ...  The remaining spatial dimensions provide transmit diversity. We assume perfect channel state information at the BSs and users.  ...  multiplexing gain, (2) provide diversity for the scheduled users, and (3) as often stated as a major advantage of massive MIMO systems, null interference at out-of-cell users.  ... 
doi:10.1109/allerton.2015.7447014 dblp:conf/allerton/Hosseini0A15 fatcat:kxugoirkardqjm7yodpt6hy7tq

Modeling and analysis of ergodic capacity in network MIMO systems

Kianoush Hosseini, Wei Yu, Raviraj S. Adve
2014 2014 IEEE Globecom Workshops (GC Wkshps)  
In the second part of this paper, we use tools from stochastic geometry to completely characterize the user ergodic capacity in network MIMO systems.  ...  This paper studies the downlink ergodic capacity of a network multiple-input multiple-output (MIMO) system.  ...  We further use tools from stochastic geometry to account for the random BS locations in characterizing the downlink ergodic capacity of network MIMO systems.  ... 
doi:10.1109/glocomw.2014.7063532 dblp:conf/globecom/HosseiniYA14 fatcat:3kaj2hwtmzflpiak6p3qwmvuu4

Multi User MIMO Communication: Basic Aspects, Benefits and Challenges [chapter]

Ben Zid, Raoof Kosai
2013 Recent Trends in Multi-user MIMO Communications  
We firstly present some of the main aspects of the MIMO communication. We introduce the basic concepts of MIMO communication as well as MIMO channel modeling.  ...  Finally, we introduce linear precoding techniques which could be exploited in multi-user MIMO systems in order to suppress inter-user interference.  ...  R , N T ) is the rank of the channel matrix H 3.  ... 
doi:10.5772/57133 fatcat:7h5fe4haoresjmnhz3ooflurmm

Throughput and energy efficiency of two-tier cellular networks: Massive MIMO overlay for small cells

Sadaf Nawaz, Syed Ali Hassan, Syed Ali Raza Zaidi, Mounir Ghogho
2016 2016 International Wireless Communications and Mobile Computing Conference (IWCMC)  
More specifically, the proposed scheme is designed by capturing the random locations of the users in both tiers by a Poisson Point Process (PPP).  ...  In this paper, the downlink performance of twotier heterogenous network is investigated.  ...  Notice that in case of co-channel deployment, small cell user may experience significant interference from the Massive MIMO BS.  ... 
doi:10.1109/iwcmc.2016.7577173 dblp:conf/iwcmc/NawazHZG16 fatcat:g3st4m5fsvbilojn5ztemn62bi

Unified Stochastic Geometry Model for MIMO Cellular Networks with Retransmissions [article]

Laila Hesham Afify, Hesham ElSawy, Tareq Y. Al-Naffouri, and Mohamed-Slim Alouini
2016 arXiv   pre-print
The developed paradigm accounts for signal retransmission upon decoding errors, in which the temporal correlation among the signal-to-interference plus-noise-ratio (SINR) of the original and retransmitted  ...  This paper presents a unified mathematical paradigm, based on stochastic geometry, for downlink cellular networks with multiple-input-multiple-output (MIMO) base stations (BSs).  ...  of the lumped interference and noise terms in (3) .  ... 
arXiv:1604.02960v1 fatcat:xwrqtvn5prbsxbgdcetljawqte

IEEE 802.11ac multi-user MIMO capacity and impact of antenna array geometry based on indoor measurements

Khouloud Issiali, Valery Guillet, Ghais El Zein, Gheorghe Zaharia
2015 2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)  
We have also shown, using measured path loss values, that the capacity gain of MU-MIMO to SU-MIMO goes beyond the double when the difference between the received power of each user is high.  ...  Based on channel measurements conducted at 5 GHz, this paper examines the impact of transmitting antennas on the Block Diagonalization (BD) capacity gain for IEEE 802.11ac Multi-User Multiple Input Multiple  ...  Each of these users is also equipped with a single or multiple antennas. The management of multiple users generates a new interference called Inter User Interference (IUI).  ... 
doi:10.1109/pimrc.2015.7343393 dblp:conf/pimrc/IssialiGZZ15 fatcat:xuurhwog6rbznjls7pasot6xle

Increasing throughput in cellular networks with higher-order sectorization

Howard Huang, Osama Alrabadi, John Daly, Dragan Samardzija, Cuong Tran, Reinaldo Valenzuela, Susan Walker
2010 2010 Conference Record of the Forty Fourth Asilomar Conference on Signals, Systems and Computers  
We study the impact of higher-order sectorization (up to 12 sectors per cell site) in cellular networks with low angle spread and a high density of users.  ...  Under ideal sector patterns (with no intersector interference), the mean throughput per site scales directly with S, the number of sectors per site.  ...  Compared to S = 1 whose geometry is unbounded because a user can be arbitrarily close to the serving base, the geometry for S ≥ 3 is limited as a result of interference from other sectors belonging to  ... 
doi:10.1109/acssc.2010.5757638 fatcat:ufloc6n6pbgizjkntzavtjrgqi

Favorable Propagation for Massive MIMO with Circular and Cylindrical Antenna Arrays [article]

Elham Anarakifirooz, Sergey Loyka
2021 arXiv   pre-print
The analysis is based on a novel method using a Bessel function expansion, a new bounding technique and a simplified representation of inter-user interference for array geometries obeying Kronecker structure  ...  Massive MIMO systems with uniform circular and cylindrical antenna arrays are studied.  ...  i=2 where hi , xi are the channel vector and information-bearing so that the inter-user interference asymptotically vanishes signal of i-th user, i = 1, ..., M ; y, ξ are the received  ... 
arXiv:2112.02404v1 fatcat:sc2owryvvzdgzpgi5pgxfqnijq

Interference mitigation for MIMO systems employing user-specific, linear precoding

Afif Osseiran, Kambiz Zangi, Dennis Hui, Leonid Krasny
2008 2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications  
User-specific, linear precoding is used extensively by almost all existing and emerging wireless MIMO standards [1], [2], [3], [4] .  ...  For example, with 4 transmit antennas at the BS, 2 receive antennas at the mobile, and instant channel quality indicator (CQI), the cell capacity of a 4x2 2-clustered system with user-specific, linear  ...  ACKNOWLEDGMENT Part of this work has been performed in the framework of the IST project IST-4-027756 WINNER II, which is partly funded by the European Union.  ... 
doi:10.1109/pimrc.2008.4699630 dblp:conf/pimrc/OsseiranZHK08 fatcat:j7xp6xvpsfbo7d63vwb2pfiqzy

Generalized MMSE Beamforming for Downlink MIMO Systems

Hyoungjoo Lee, Illsoo Sohn, Donghyun Kim, Kwang Bok Lee
2011 2011 IEEE International Conference on Communications (ICC)  
The derived beamforming solution captures the impacts of the random geometry and different temporal correlations of users.  ...  Unlike the conventional MMSE beamforming, cellular environments are considered where each user is randomly distributed in a cell and has the different temporal correlation of fading channel.  ...  In MC-MIMO, multiple BSs exploit multiple transmit antennas to mitigate the other cell interference through share of user channel information.  ... 
doi:10.1109/icc.2011.5962843 dblp:conf/icc/LeeSKL11 fatcat:gfn4zzjafjftxbmrek4lh3kgua

Eliminating Interference in LOS Massive Multi-User MIMO with a Few Transceivers [article]

Uri Erez, Amir Leshem
2019 arXiv   pre-print
In particular, in the downlink direction, there is no need for complicated dirty paper coding; each user can use an optimal code for a single user interference-free channel.  ...  It is shown that for a given number of interferers, it suffices that the number of transmit/receive chains exceeds the number of desired users by one, assuming a sufficiently large antenna array.  ...  SIMULATIONS To test the proposed MU-MIMO scheme for a LOS channel, we assumed that we have two desired users and 3 undesired users which serve as out of cell interference.  ... 
arXiv:1903.01369v1 fatcat:vy7h7j7jw5gmpnu6kg4u7nvxaq

Power Domain Multiplexing Approach in MIMO based Non Orthogonal Multiple Access

Sarala Patchala, Dr.M. Sailaja
2019 International Journal of Research in Advent Technology  
The NOMA to achieve with the more number of users in the power domain. NOMA is capable of significantly increasing the number of simultaneous connections.  ...  Here, conventional MIMO system compared with the mm-wave MIMO. The channel sparasity and uncertainty in bema space MIMO system.  ...  The conventional MIMO is compared with mmWave MIMO. The existing MIMO need to reduce inter beam interference realize precoding based on zero forcing [3] .  ... 
doi:10.32622/ijrat.732019113 fatcat:frqeg7rhtzfefant4zdpl7skk4
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