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

Resolving a feedback bottleneck of multi-antenna coded caching

Lampiris, Eleftherios; Elia, Petros

Submitted on ArXiV, 9 Novembre 2018

 The work here makes substantial progress towards resolving the well known feedback bottleneck of multi-antenna coded caching, by introducing a fundamentally new algorithm that completely untangles caching gains from feedback costs. In the context of the K-user MISO broadcast channel with cacheaided receivers and an L-antenna transmitter, the algorithm achieves full multiplexing gains and unbounded near-optimal caching gains at the mere CSIT/CSIR costs associated to achieving multiplexing gains only. While prior state-of-art required feedback costs that scaled with K, the new algorithm requires only L uplink/downlink feedback acquisition slots, irrespective of how large the achieved caching gain is, and thus irrespective of how many users are served at a time. In the end, the result solidifies the role of coded caching as a method for reducing feedback requirements in multi-antenna environments. 

Document Arxiv Bibtex

Titre:Resolving a feedback bottleneck of multi-antenna coded caching
Type:Conférence
Langue:English
Ville:
Date:
Département:Systèmes de Communication
Eurecom ref:5739
Copyright: © EURECOM. Personal use of this material is permitted. The definitive version of this paper was published in Submitted on ArXiV, 9 Novembre 2018 and is available at :
Bibtex: @inproceedings{EURECOM+5739, year = {2018}, title = {{R}esolving a feedback bottleneck of multi-antenna coded caching}, author = {{L}ampiris, {E}leftherios and {E}lia, {P}etros}, booktitle = {{S}ubmitted on {A}r{X}i{V}, 9 {N}ovembre 2018}, address = {}, month = {11}, url = {http://www.eurecom.fr/publication/5739} }
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