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Precoded integer-forcing universally achieves the MIMO capacity to within a constant gap

Or Ordentlich, Uri Erez
2013 2013 IEEE Information Theory Workshop (ITW)  
It is shown that this communication architecture achieves the capacity of any Gaussian MIMO channel up to a gap that depends only on the number of transmit antennas.  ...  At the receiver side, integer-forcing equalization is applied, followed by standard single-stream decoding.  ...  ACKNOWLEDGMENT The authors would like to thank Yair Yona, Elad Domanovitz, Barak Weiss and Bobak Nazer for helpful discussions.  ... 
doi:10.1109/itw.2013.6691273 dblp:conf/itw/OrdentlichE13 fatcat:xzxk7qqkabdbjk4lu76tfqlwuq

Precoded Integer-Forcing Universally Achieves the MIMO Capacity to Within a Constant Gap

Or Ordentlich, Uri Erez
2015 IEEE Transactions on Information Theory  
It is shown that this communication architecture achieves the capacity of any Gaussian MIMO channel up to a gap that depends only on the number of transmit antennas.  ...  At the receiver side, integer-forcing equalization is applied, followed by standard single-stream decoding.  ...  ACKNOWLEDGMENT The authors would like to thank Yair Yona, Elad Domanovitz, Barak Weiss and Bobak Nazer for helpful discussions.  ... 
doi:10.1109/tit.2014.2370047 fatcat:bxil3dyz75fl7o2mfchnulfyby

Precoded Integer-Forcing Universally Achieves the MIMO Capacity to Within a Constant Gap [article]

Or Ordentlich, Uri Erez
2014 arXiv   pre-print
It is shown that this communication architecture achieves the capacity of any Gaussian multiple-input multiple-output channel up to a gap that depends only on the number of transmit antennas.  ...  At the receiver side, integer-forcing equalization is applied, followed by standard single-stream decoding.  ...  The next theorem shows that precoded IF attains the compound MIMO capacity to within a constant gap.  ... 
arXiv:1301.6393v3 fatcat:k4avccatp5dwdds5iyiakqq6i4

Explicit Lower Bounds on the Outage Probability of Integer Forcing over Nrx2 Channels [article]

Elad Domanovitz, Uri Erez
2017 arXiv   pre-print
An upper bound on the resulting outage probability as a function of the gap to capacity has been derived previously, assuming a random precoding matrix drawn from the circular unitary ensemble is applied  ...  Lastly, we demonstrate that the integer-forcing equalization coupled with distributed space-time coding is able to approach these bounds.  ...  It was shown that such an architecture universally achieves capacity up to a constant gap, provided that the precoding matrix corresponds to a linear perfect spacetime code [2] , [3] .  ... 
arXiv:1706.03342v2 fatcat:5wk4kjkwcjafxijaqy67vxw2ai

Precoding in Multiantenna and Multiuser Communications

C. Windpassinger, R.F.H. Fischer, T. Vencel, J.B. Huber
2004 IEEE Transactions on Wireless Communications  
It is shown that the capacity of the underlying MIMO channel can be utilized asymptotically by means of non-linear precoding.  ...  Moreover, it outperforms decision-feedback equalization at the receiver side which is applicable if joint processing at the receiver side is possible, and which suffers from error propagation.  ...  Moreover, going to higherdimensional precoding lattices, the so-called shaping gap can be bridged. In [13] a scheme denoted by "inflated lattice" precoding is proved to be capacity-achieving.  ... 
doi:10.1109/twc.2004.830852 fatcat:s7bni5b4azadxhlvqnrgzjfaii

Spatial Resources Optimization in Distributed MIMO Networks with Limited Data Sharing [article]

Antonis G. Gotsis, Angeliki Alexiou
2013 arXiv   pre-print
In such a complex network, distributed MIMO resources optimization is of paramount importance, in order to achieve capacity scaling.  ...  with the mobile data capacity crunch.  ...  Inspired by the well-known principles of Network MIMO [5] , an ultradense network could provide linear capacity scaling if the number of infrastructure nodes is at least equal to the number of access  ... 
arXiv:1304.1020v1 fatcat:35pj3g5oi5hkdpzkzskivp3aem

Waveforms for the Massive MIMO Downlink: Amplifier Efficiency, Distortion, and Performance

Christopher Mollen, Erik G. Larsson, Thomas Eriksson
2016 IEEE Transactions on Communications  
should be used in a massive MIMO base station.  ...  It is found that (i) OFDM and single-carrier transmission have the same performance over a hardened massive MIMO channel and (ii) when the higher amplifier power efficiency of low-PAR precoding is taken  ...  Achievable Data Rates In this section, an achievable rate is derived by breaking up the received signal into terms that are correlated to the desired signal s k [n] and terms that are uncorrelated to it  ... 
doi:10.1109/tcomm.2016.2557781 fatcat:tcvv3s5i4vh4jekyfag4jyb3ha

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
Our experimental testbed, comprised of two access points and two clients, shows that AirSync is able to achieve phase synchronization within a few degrees, and allows the system to nearly achieve the theoretical  ...  In theory, the best approach to density increase is via distributed multiuser MIMO, where several access points are connected to a central server and operate as a large distributed multi-antenna access  ...  The well-known linear Zero-Forcing Beamforming (ZFBF) [6] achieves the same high-SNR capacity factor increase, with some fixed gap from optimal that can be reduced when the number of clients is large  ... 
arXiv:1205.6862v2 fatcat:2y45tzq2hjfm3ma4kudritjx6m

Uplink-Downlink Duality for Integer-Forcing [article]

Wenbo He, Bobak Nazer, Shlomo Shamai
2018 arXiv   pre-print
Using this duality relationship, it is shown that integer-forcing can operate within a constant gap of the MIMO BC sum capacity.  ...  This paper establishes an uplink-downlink duality relationship for integer-forcing, i.e., any sum rate that is achievable via integer-forcing on the MIMO MAC can be achieved via integer-forcing on the  ...  ACKNOWLEDGMENT The authors would like to thank Or Ordentlich for valuable discussions, Islam El Bakoury for help with the simulations, and the associate editor and reviewers for their thoughtful comments  ... 
arXiv:1608.03351v2 fatcat:qdb25wmk6fai3mmgnggc4jzfp4

On the Separability of Ergodic Fading MIMO Channels: A Lattice Coding Approach

Ahmed Hindy, Aria Nosratinia
2018 IEEE Transactions on Communications  
In addition, a variant of the proposed scheme is presented for the MIMO ergodic fading channel with CSIR only, where we prove the existence of a universal codebook that achieves rates within a constant  ...  gap to capacity for finite-support fading distributions.  ...  ACKNOWLEDGMENT The authors acknowledge the associate editor and the reviewers for useful comments that led to tightening the results in Section IV.  ... 
doi:10.1109/tcomm.2018.2855191 fatcat:qkgeek3kjjhgdemnktxxrsimqy

Dynamic Channel Acquisition in MU-MIMO

Zhiyuan Jiang, Sheng Zhou, Zhisheng Niu
2014 IEEE Transactions on Communications  
The scheduling scheme based on GAP, namely the GAP-rule, is proved to be throughput-optimal but practically infeasible, and thus serves as a performance bound.  ...  In this paper, we investigate user-scheduling in MU-MIMO systems on account of CSI acquisition overhead, where a base station dynamically acquires user channels to avoid choking the system with CSI overhead  ...  Furthermore, the work [1] gives an achievable sum rate considering a practical training and feedback scheme with a zero-forcing precoder.  ... 
doi:10.1109/tcomm.2014.2369032 fatcat:5j7fvgyz4ne6jaul7ohpvhcgdq

MIMO Broadcast Channels With Finite-Rate Feedback

N. Jindal
2006 IEEE Transactions on Information Theory  
This is in sharp contrast to point-to-point MIMO systems, in which it is not necessary to increase the feedback rate as a function of the SNR.  ...  A key finding is that the feedback rate per mobile must be increased linearly with the SNR (in dB) in order to achieve the full multiplexing gain.  ...  Note that the capacity-achieving strategy is linear precoding with the addition of a pre-coding 3 It is conjectured that the multiplexing gain in this scenario is in fact equal to one, although this  ... 
doi:10.1109/tit.2006.883550 fatcat:oaf7wpdaondt7klgjiojfwisca

Noncoherent Interference Alignment: Trade Signal Power for Diversity Towards Multiplexing [article]

Haishi Ning, Maria Estela, Cong Ling
2012 arXiv   pre-print
This paper starts with detailed analysis of the diagonality problem of naive symbol extension in small (1×1)^3 networks, a technique widely regarded as necessary to achieve interference alignment with  ...  Finally, the proposed noncoherent interference alignment scheme is extended to general (1×1)^K cases and is proven to achieve the degree of freedom upper bound exactly.  ...  Thus, there is a constant gap (in the medium-to-high SNR regime where interference rather than noise is the dominating factor that affects the throughput) between the achievable throughput and the capacity  ... 
arXiv:1009.5121v3 fatcat:pfrgm5zx6rhkzkqjw3fqbiwhwq

Treating Content Delivery in Multi-Antenna Coded Caching as General Message Sets Transmission: A DoF Region Perspective [article]

Youlong Cao, Meixia Tao
2019 arXiv   pre-print
The obtained minimum NDT is optimal at antenna configuration M/N∈ (0,1]∪[K, ∞) and is within a multiplicative gap of M/N to optimum at M/N∈ (1,K).  ...  While the original delivery scheme in coded caching multicasts each coded message sequentially, it is not optimal for multiple-input multiple-output (MIMO) broadcast channels.  ...  The main idea is to design the receive combining matrices at user side to equalize the effective channels experienced by the same data stream on different target users and use a transmit zero-forcing precoding  ... 
arXiv:1807.01432v2 fatcat:ld247waxmbejdg3tlre4emy4v4

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  
Our experimental testbed, comprised of two access points and two clients, shows that AirSync is able to achieve phase synchronization within a few degrees, and allows the system to nearly achieve the theoretical  ...  In theory, the best approach to density increase is via distributed multiuser MIMO, where several access points are connected to a central server and operate as a large distributed multi-antenna access  ...  The well-known linear Zero-Forcing Beamforming (ZFBF) achieves the same high-SNR capacity factor increase, with some fixed gap from optimal that can be reduced when the number of clients is large and the  ... 
doi:10.1109/tnet.2012.2230449 fatcat:7scahekbezer7j457v7xfio6by
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