• The Generalized Degrees of Fre...

Result: The Generalized Degrees of Freedom Region of the MIMO Interference Channel and Its Achievability

Title:
The Generalized Degrees of Freedom Region of the MIMO Interference Channel and Its Achievability
Authors:
KARMAKAR, Sanjay, VARANASI, Mahesh K
Source:
IEEE transactions on information theory. 58(12):7188-7203
Publisher Information:
New York, NY: Institute of Electrical and Electronics Engineers, 2012.
Publication Year:
2012
Physical Description:
print, 27 ref
Original Material:
INIST-CNRS
Subject Terms:
Telecommunications, Télécommunications, Sciences exactes et technologie, Exact sciences and technology, Sciences appliquees, Applied sciences, Telecommunications et theorie de l'information, Telecommunications and information theory, Théorie de l'information, du signal et des communications, Information, signal and communications theory, Théorie de l'information, Information theory, Théorie du signal et des communications, Signal and communications theory, Codage, codes, Coding, codes, Télécommunications, Telecommunications, Systèmes, réseaux et services de télécommunications, Systems, networks and services of telecommunications, Transmission et modulation (techniques et équipements), Transmission and modulation (techniques and equipments), Radiocommunications, Antennes, Antennas, Traitement signal, Signal processing, Procesamiento señal, Antenne, Antenna, Antena, Canal gaussien, Gaussian channel, Canal gaussiano, Codage linéaire, Linear coding, Codificación lineal, Code optimal, Optimal code, Código optimal, Décodage, Decoding, Desciframiento, Evaluation performance, Performance evaluation, Evaluación prestación, Formation voie, Beam forming, Formación haz, Interférence signal, Signal interference, Milieu infini, Infinite medium, Medio infinito, Planification optimale, Optimal planning, Planificación óptima, Rapport signal bruit, Signal to noise ratio, Relación señal ruido, Secteur privé, Private sector, Sector privado, Stratégie optimale, Optimal strategy, Estrategia optima, Système MIMO, MIMO system, Sistema MIMO, Système SISO, SISO system, Sistema SISO, Système temps partagé, Time sharing system, Sistema tiempo parcelado, Capacity, MIMO, generalized degrees of freedom, interference channel
Document Type:
Academic journal Article
File Description:
text
Language:
English
Author Affiliations:
Qualcomm Inc., San Diego, CA 92121, United States
Department of Electrical, Computer, and Energy Engineering, University of Colorado, Boulder, CO 80309-0425, United States
ISSN:
0018-9448
Access URL:
http://pascal-francis.inist.fr/vibad/index.php?action=search&terms=26762609
Rights:
Copyright 2014 INIST-CNRS
CC BY 4.0
Sauf mention contraire ci-dessus, le contenu de cette notice bibliographique peut être utilisé dans le cadre d’une licence CC BY 4.0 Inist-CNRS / Unless otherwise stated above, the content of this bibliographic record may be used under a CC BY 4.0 licence by Inist-CNRS / A menos que se haya señalado antes, el contenido de este registro bibliográfico puede ser utilizado al amparo de una licencia CC BY 4.0 Inist-CNRS
Notes:
Telecommunications and information theory
Accession Number:
edscal.26762609
Database:
PASCAL Archive

Further Information

The generalized degrees of freedom (GDoF) region of the MIMO Gaussian interference channel (IC) is obtained for the general case of an arbitrary number of antennas at each node and where the signal-to-noise ratios (SNRs) and interference-to-noise ratios vary with arbitrary exponents to a nominal SNR. The GDoF-optimal coding scheme involves message splitting and partial interference decoding and consists of linear Gaussian superposition coding of the private and common submessages that can be seen as jointly performing signal-space and signal-level interference alignment. The admissible degree of freedom (DoF)-splits between the private and common messages are also specified. A study of the GDoF region reveals various insights through the joint dependence of optimal interference management techniques at high SNR on the SNR exponents and the numbers of antennas at the four terminals. For instance, it reveals that, unlike in the scalar IC, treating interference as noise is not always GDoF-optimal even in the very weak interference regime. Moreover, while the DoF-optimal strategy that relies just on transmit/receive zero-forcing beamforming and time sharing is not GDoF optimal (and thus has an unbounded gap to capacity), the precise characterization of the very strong interference regime—where single-user DoF performance can be achieved simultaneously for both users—depends on the relative numbers of antennas at the four terminals and thus deviates from what it is in the single-input single-output case. For asymmetric numbers of antennas at the four nodes, the shape of the symmetric GDoF curve can be a distorted W curve to the extent that for certain multiple-input multiple-output ICs it is a V curve.