University of Oulu

A. Tolli, S. P. Shariatpanahi, J. Kaleva and B. Khalaj, "Multicast Beamformer Design for Coded Caching," 2018 IEEE International Symposium on Information Theory (ISIT), Vail, CO, 2018, pp. 1914-1918. doi: 10.1109/ISIT.2018.8437354

Multicast beamformer design for coded caching

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Author: Tölli, Antti1; Shariatpanahi, Seyed Pooya2; Kaleva, Jarkko1;
Organizations: 1Centre for Wireless Communications, University of Oulu, P.O. Box 4500, 90014, Finland
2School of Computer Science, Institute for Research in Fundamental Sciences (IPM), Tehran, Iran
3Department of Electrical Engineering, Sharif University of Technology, Tehran, Iran
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.3 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2018
Publish Date: 2020-01-08


A single cell downlink scenario is considered where a multiple-antenna base station delivers contents to cache-enabled user terminals. Using the ideas from multi-server coded caching (CC) scheme developed for wired networks, a joint design of CC and general multicast beamforming is considered to benefit from spatial multiplexing gain, improved interference management and the global CC gain, simultaneously. The proposed multicast beamforming strategies utilize the multiantenna multicasting opportunities provided by the CC technique and optimally balance the detrimental impact of both noise and inter-stream interference from coded messages transmitted in parallel. The proposed scheme is shown to provide the same degrees-of-freedom at high SNR as the state-of-art methods and, in general, to perform significantly better than several baseline schemes including, the joint zero forcing and CC, max-min fair multicasting with CC, and basic unicasting with multiuser beamforming.

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Series: IEEE International Symposium on Information Theory proceedings
ISSN: 2157-8095
ISSN-E: 2157-8117
ISSN-L: 2157-8095
ISBN: 978-1-5386-4781-3
ISBN Print: 978-1-5386-4102-6
Pages: 1914 - 1918
DOI: 10.1109/ISIT.2018.8437354
Host publication: 2018 IEEE International Symposium on Information Theory (ISIT)
Conference: IEEE International Symposium on Information Theory
Type of Publication: A4 Article in conference proceedings
Field of Science: 213 Electronic, automation and communications engineering, electronics
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