Wireless information and power transfer in multi-way relay networks with massive MIMO

Gayan Amarasuriya, H. Vincent Poor

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Scopus citations

Abstract

Simultaneous wireless information and power transfer for multi-way relay networks with massive multiple-input multiple-output (MIMO) is investigated. By using two practically viable relay receiver designs, namely (i) the power splitting receiver and (ii) 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, the fundamental trade-off between the harvested energy and the achievable sum rate is quantified for both relay receiver structures. This analysis reveals that the transmit power of each user node can be scaled down inversely proportional to the number of relay antennas, and the corresponding asymptotic SINR and sum rate expressions become independent of the fast fading effects of the wireless channels. The presence of co-channel 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 co-channel interferers. Nevertheless, the detrimental impact of CCI for signal decoding can be cancelled completely whenever the number of relay antennas grows without bound.

Original languageEnglish (US)
Title of host publication2015 IEEE Global Communications Conference, GLOBECOM 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479959525
DOIs
StatePublished - Jan 1 2015
Event58th IEEE Global Communications Conference, GLOBECOM 2015 - San Diego, United States
Duration: Dec 6 2015Dec 10 2015

Publication series

Name2015 IEEE Global Communications Conference, GLOBECOM 2015

Other

Other58th IEEE Global Communications Conference, GLOBECOM 2015
CountryUnited States
CitySan Diego
Period12/6/1512/10/15

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering
  • Communication

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