Graduate School and Research Center in Digital Sciences

DoF region of the decentralized MIMO broadcast channel - How many informed antennas do we need?

Bazco-Nogueras, Antonio; Davoodi, Arash; de Kerret, Paul; Gesbert, David; Gresset, Nicolas; Jafar, Syed

Submitted on ArXiV on 13 January 2020

We study the impact of imperfect sharing of the Channel State Information (CSI) available at the transmitters on the capacity of the Network MIMO setting. In particular, we consider the setting in which a set of M transmit antennas jointly serve two multi-antenna users, where only a subset of k transmit antennas are endowed with perfect CSI whereas the other M-k transmit antennas have only access to finite precision CSI. By analyzing this configuration we aim to answer the question of how much an extra informed antenna can help. We characterize the Degrees-of-Freedom (DoF) region of the (M,N_1,N_2,k) Broadcast Channel (BC) and we show that only k = max(N_1,N_2) antennas with perfect CSI are needed to achieve the DoF of the conventional BC with perfect CSIT.  

Arxiv Bibtex

Title:DoF region of the decentralized MIMO broadcast channel - How many informed antennas do we need?
Type:Conference
Language:English
City:
Date:
Department:Communication systems
Eurecom ref:6159
Copyright: © EURECOM. Personal use of this material is permitted. The definitive version of this paper was published in Submitted on ArXiV on 13 January 2020 and is available at :
Bibtex: @inproceedings{EURECOM+6159, year = {2020}, title = {{D}o{F} region of the decentralized {MIMO} broadcast channel - {H}ow many informed antennas do we need?}, author = {{B}azco-{N}ogueras, {A}ntonio and {D}avoodi, {A}rash and de {K}erret, {P}aul and {G}esbert, {D}avid and {G}resset, {N}icolas and {J}afar, {S}yed}, booktitle = {{S}ubmitted on {A}r{X}i{V} on 13 {J}anuary 2020}, address = {}, month = {01}, url = {http://www.eurecom.fr/publication/6159} }
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