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

Opportunistic feedback mechanisms for decentralized network MIMO systems

Kottath, Sandeep; Gesbert, David; Hardouin, Eric

ICC 2015, IEEE International Conference on Communications, 8-12 June 2015, London, United Kingdom

Dense interference-limited wireless networks can rely coordinated multipoint transmission (such as Network MIMO) as a way to improve on spectral efficiency. Unfortunately, Network MIMO requires global channel state information (CSI) at all transmitters, hence places stringent requirements on backhaul rate and even more on latency. As a solution, this paper investigates an emerging design philosophy for CSI that exploits the broadcast nature of wireless which is well suited to dense networks. In our design,  feedback is broadcast from each terminal and decoded opportunistically by any overhearing base station which in turn must design opportunistic interference-cancelling precoders. The corresponding precoder design is shown to be equivalent to a decentralized decision problem whose general solution is challenging, yet for which heuristic schemes can be derived. The obtained algorithms are able to capitalize on the opportunistic feedback without the need for global CSI sharing.  

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Titre:Opportunistic feedback mechanisms for decentralized network MIMO systems
Département:Systèmes de Communication
Eurecom ref:4538
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Bibtex: @inproceedings{EURECOM+4538, doi = {}, year = {2015}, title = {{O}pportunistic feedback mechanisms for decentralized network {MIMO} systems}, author = {{K}ottath, {S}andeep and {G}esbert, {D}avid and {H}ardouin, {E}ric }, booktitle = {{ICC} 2015, {IEEE} {I}nternational {C}onference on {C}ommunications, 8-12 {J}une 2015, {L}ondon, {U}nited {K}ingdom}, address = {{L}ondon, {ROYAUME}-{UNI}}, month = {06}, url = {} }
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