liu.seSearch for publications in DiVA
Change search
ReferencesLink to record
Permanent link

Direct link
Wireless Information and Power Transfer in Multiway Massive MIMO Relay Networks
Princeton University, NJ 08544 USA.
Linköping University, Department of Electrical Engineering, Communication Systems. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-7599-4367
Princeton University, NJ 08544 USA.
2016 (English)In: IEEE Transactions on Wireless Communications, ISSN 1536-1276, E-ISSN 1558-2248, Vol. 15, no 6, 3837-3855 p.Article in journal (Refereed) PublishedText
Abstract [en]

Simultaneous wireless information and power transfer techniques for multiway massive multiple-input multiple-output (MIMO) relay networks are investigated. By using two practically viable relay receiver designs, namely 1) the power splitting receiver and 2) the time switching receiver, asymptotic signal-to-interference-plus-noise ratio (SINR) expressions are derived for an unlimited number of antennas at the relay. These asymptotic SINRs are then used to derive asymptotic symmetric sum rate expressions in closed form. Notably, these asymptotic SINRs and sum rates become independent of radio frequency-to-direct current (RF-to-DC) conversion efficiency in the limit of infinitely many relay antennas. Moreover, tight average sum rate approximations are derived in closed form for finitely many relay antennas. The fundamental tradeoff between the harvested energy and the sum rate is quantified for both relay receiver structures. Notably, the detrimental impact of imperfect channel state information (CSI) on the MIMO detector/precoder is investigated, and thereby, the performance degradation caused by pilot contamination, which is the residual interference due to nonorthogonal pilot sequence usage in adjacent/cochannel systems, is quantified. The presence of cochannel interference (CCI) can be exploited to be beneficial for energy harvesting at the relay, and consequently, the asymptotic harvested energy is an increasing function of the number of cochannel interferers. Notably, in the genie-aided perfect CSI case, the detrimental impact of CCI for signal decoding can be cancelled completely whenever the number of relay antennas grows without bound. Nevertheless, the pilot contamination severely degrades the sum rate performance even for infinitely many relay antennas.

Place, publisher, year, edition, pages
Keyword [en]
Wireless information and power transfer; massive MIMO; AF relaying
National Category
URN: urn:nbn:se:liu:diva-130289DOI: 10.1109/TWC.2016.2530067ISI: 000378506600005OAI: diva2:950577

Funding Agencies|Natural Sciences and Engineering Research Council of Canada (NSERC); U.S. National Science Foundation [ECCS-1343210]

Available from: 2016-08-01 Created: 2016-07-28 Last updated: 2016-08-31

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Larsson, Erik G
By organisation
Communication SystemsFaculty of Science & Engineering
In the same journal
IEEE Transactions on Wireless Communications

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 82 hits
ReferencesLink to record
Permanent link

Direct link