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

Wei, Xiao; Xiang, Lin; Cottatellucci, Laura; Jiang, Tao; Schober, Robert

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


	Document type :	Scientific congresses, symposiums and conference proceedings : Paper published in a book
	Discipline(s) :	Engineering, computing & technology : Electrical & electronics engineering
	Focus Areas :	Security, Reliability and Trust
	To cite this reference:	http://hdl.handle.net/10993/39525

Title :	Cache-Aided Massive MIMO: Linear Precoding Design and Performance Analysis
Language :	English
Author, co-author :	Wei, Xiao []
	Xiang, Lin [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > >]
	Cottatellucci, Laura []
	Jiang, Tao []
	Schober, Robert []
Publication date :	2019
Main document title :	Proc. IEEE ICC 2019
Peer reviewed :	Yes
Event name :	Proc. IEEE ICC
Event date :	May 2019
Event place (city) :	Shanghai
Keywords :	[en] Massive MIMO ; Caching ; Interference cancellation ; Ergodic achievable rate
Abstract :	[en] 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.
Name of the research project :	FnR Core Project ProCAST (grant R-AGR-3415-10)
Permalink :	http://hdl.handle.net/10993/39525
FnR project :	FnR ; FNR11691338 > Bjorn Ottersten > ProCAST > Proactive Edge Caching for Content Delivery Networks powered by Hybrid Satellite/Terrestrial Backhauling > 01/07/2018 > 30/06/2021 > 2017

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