Multi-antenna Coded Caching at Finite-SNR: Breaking Down the Gain Structure

TL;DR

This paper analyzes the finite-SNR performance of multi-antenna coded caching schemes, categorizing six key parameters, studying their interactions, and assessing their impact on implementation complexity through theoretical and numerical analysis.

Contribution

It provides a comprehensive breakdown of six critical parameters affecting finite-SNR performance in multi-antenna coded caching, bridging a gap in existing research.

Findings

Identified six key parameters influencing performance

Analyzed parameter interactions and complexity impacts

Validated findings with numerical simulations

Abstract

Multi-antenna coded caching (CC) techniques are considered viable options for achieving higher data rates in future networks, especially for the prominent use case of multimedia-driven applications. However, despite their information-theoretic analyses, which are thoroughly studied in the literature, the research on the finite-SNR performance of multi-antenna CC techniques is not yet mature. In this paper, we try bridging this gap by breaking down, categorizing, and studying the effect of six crucial parameters affecting the finite-SNR performance of multi-antenna CC schemes. We also investigate the interaction of different parameters and clarify how they could affect the implementation complexity in terms of the necessary computation and subpacketization. Theoretical discussions are followed and verified by numerical analysis.