Ecole d'ingénieur et centre de recherche en Sciences du numérique

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

Titre:Distributed CSIT does not reduce the generalized DoF of the 2-user MISO broadcast channel
Mots Clés:Generalized Degrees-of-Freedom, Distributed MISO Broadcast Channel, Cooperative Systems, Imperfect CSI
Département:Systèmes de Communication
Eurecom ref:5754
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Bibtex: @article{EURECOM+5754, doi = {}, 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 = {} }
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