University of Oulu

M. Salehi, A. Tölli and S. P. Shariatpanahi, "Subpacketization - Beamformer Interaction in Multi-Antenna Coded Caching," 2020 2nd 6G Wireless Summit (6G SUMMIT), Levi, Finland, 2020, pp. 1-5, doi: 10.1109/6GSUMMIT49458.2020.9083779

Subpacketization : beamformer interaction in multi-antenna coded caching

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Author: Salehi, Mohammad Javad1; Tölli, Antti1; Shariatpanahi, Seyed Pooya2
Organizations: 1Center for Wireless Communications, University of Oulu, Oulu, Finland
2School of Electrical and Computer Engineering, College of Engineering, University of Tehran, 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, 2020
Publish Date: 2020-06-29


We study the joint effect of beamformer structure and subpacketization level on the achievable rate of cache-enabled multi-antenna communications. We use appropriate low-SNR approximations, to show that using simple zero-forcing (ZF) beamformers, increasing subpacketization degrades the achievable rate; in contrast to what has been shown in the literature for more complex, optimized beamformers. We also numerically analyze the probability distribution of symmetric rate terms, in order to confirm the validity of mathematical outputs. The results suggest that for improving the content delivery rate at low-SNR, subpacketization level and beamformer complexity should be jointly increased.

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ISBN: 978-1-7281-6047-4
ISBN Print: 978-1-7281-6048-1
Pages: 1 - 5
DOI: 10.1109/6GSUMMIT49458.2020.9083779
Host publication: 2020 2nd 6G Wireless Summit (6G SUMMIT)
Conference: 6G Wireless Summit
Type of Publication: A4 Article in conference proceedings
Field of Science: 213 Electronic, automation and communications engineering, electronics
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