Cache-Aided Massive MIMO: Linear Precoding Design and Performance Analysis

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Details zur Publikation

Autorinnen und Autoren: Wei X, Xiang L, Cottatellucci L, Jiang T, Schober R
Herausgeber: IEEE
Jahr der Veröffentlichung: 2019
ISBN: 978-1-5386-8088-9
ISSN: 978-1-538
Sprache: Englisch


Abstract

In this paper, we propose a novel joint caching and massive multiple-input multiple-output (MIMO) transmission scheme, referred to as cache-aided massive MIMO, for advanced downlink cellular communications. In addition to reaping the conventional advantages of caching and massive MIMO, the proposed scheme also exploits the side information provided by cached files for interference cancellation at the receivers. This interference cancellation increases the degrees of freedom available for precoding design. In addition, the power freed by the cache-enabled offloading can benefit the transmissions to the users requesting non-cached files. The resulting performance gains are not possible if caching and massive MIMO are designed separately. We analyze the performance of cache-aided massive MIMO for cache-dependent maximum-ratio transmission (MRT), zero-forcing (ZF) precoding, and regularized zero-forcing (RZF) precoding. Lower bounds on the ergodic achievable rates are derived in closed form for MRT and ZF precoding. The ergodic achievable rate of RZF precoding is obtained for the case when the numbers of transmit antennas and users are large but their ratio is fixed. Compared to conventional massive MIMO, the proposed cache-aided massive MIMO scheme achieves a significantly higher ergodic rate especially when the number of users approaches the number of transmit antennas.


FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Cottatellucci, Laura Prof. Dr.
Professur für Digitale Übertragung
Schober, Robert Prof. Dr.-Ing.
Lehrstuhl für Digitale Übertragung


Einrichtungen weiterer Autorinnen und Autoren

Huazhong University of Science & Technology
University of Luxembourg


Zitierweisen

APA:
Wei, X., Xiang, L., Cottatellucci, L., Jiang, T., & Schober, R. (2019). Cache-Aided Massive MIMO: Linear Precoding Design and Performance Analysis. In IEEE (Eds.), Proceedings of the ICC 2019 - 2019 IEEE International Conference on Communications (ICC). Shanghai, CN.

MLA:
Wei, Xiao, et al. "Cache-Aided Massive MIMO: Linear Precoding Design and Performance Analysis." Proceedings of the ICC 2019 - 2019 IEEE International Conference on Communications (ICC), Shanghai Ed. IEEE, 2019.

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Zuletzt aktualisiert 2019-11-08 um 11:53