Graduate School and Research Center in Digital Sciences

Distributed CSIT does not reduce the generalized DoF of the 2-user MISO broadcast channel

Bazco-Nogueras, Antonio; de Kerret, Paul; Gesbert, David; Gresset, Nicolas

IEEE Wireless Communications Letters, 26 November 2018

In this letter we analyze the high Signal-to-Noise Ratio (SNR) regime performance of the multi-transmitter MISO Broadcast Channel (BC) with so-called distributed Channel State Information at the Transmitters (CSIT), i.e., where CSIT is made transmitter-dependent. Specifically, we show the unexpected result that it is possible to achieve the same Generalized Degrees-of-Freedom (GDoF) independently of whether a channel link estimate is present at one Transmitter (TX), at the other TX, or at both, and regardless of the channel pathloss topology, thanks to a novel transmission scheme. The proposed scheme involves as key ingredient a new precoding scheme coined Sliced Zero-Forcing which efficiently adapts to any distributed CSIT setting.

Document Doi Bibtex

Title:Distributed CSIT does not reduce the generalized DoF of the 2-user MISO broadcast channel
Keywords:Generalized Degrees-of-Freedom, Distributed MISO Broadcast Channel, Cooperative Systems, Imperfect CSI
Type:Journal
Language:English
City:
Date:
Department:Communication systems
Eurecom ref:5754
Copyright: © 2018 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Bibtex: @article{EURECOM+5754, doi = {http://dx.doi.org/10.1109/LWC.2018.2883455}, year = {2018}, month = {11}, title = {{D}istributed {CSIT} does not reduce the generalized {D}o{F} of the 2-user {MISO} broadcast channel}, author = {{B}azco-{N}ogueras, {A}ntonio and de {K}erret, {P}aul and {G}esbert, {D}avid and {G}resset, {N}icolas}, journal = {{IEEE} {W}ireless {C}ommunications {L}etters, 26 {N}ovember 2018}, url = {http://www.eurecom.fr/publication/5754} }
See also: