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Computer Science > Information Theory

arXiv:2109.10008 (cs)
[Submitted on 21 Sep 2021 (v1), last revised 4 Oct 2021 (this version, v2)]

Title:A Low-Subpacketization High-Performance MIMO Coded Caching Scheme

Authors:MohammadJavad Salehi, Hamidreza Bakhshzad Mahmoodi, Antti Tölli
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Abstract:In this paper, we study how coded caching can be efficiently applied to multiple-input multiple-output (MIMO) communications. This is an extension to cache-aided multiple-input single-output (MISO) communications, where it is shown that with an $L$-antenna transmitter and coded caching gain $t$, a cumulative coded caching and spatial multiplexing gain of $t+L$ is achievable. We show that, interestingly, for MIMO setups with $G$-antenna receivers, a coded caching gain larger than MISO setups by a multiplicative factor of $G$ is possible, and the full coded caching and spatial multiplexing gain of $Gt+L$ is also achievable. Furthermore, we propose a novel algorithm for building low-subpacketization, high-performance MIMO coded caching schemes using a large class of existing MISO schemes.
Subjects: Information Theory (cs.IT)
Cite as: arXiv:2109.10008 [cs.IT]
  (or arXiv:2109.10008v2 [cs.IT] for this version)
  https://doi.org/10.48550/arXiv.2109.10008

Submission history

From: Mohammadjavad Salehi [view email]
[v1] Tue, 21 Sep 2021 07:26:48 UTC (407 KB)
[v2] Mon, 4 Oct 2021 08:56:35 UTC (411 KB)
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Hamidreza Bakhshzad Mahmoodi
Antti Tölli
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