TY - GEN
T1 - Wireless information and power transfer in multi-way relay networks with massive MIMO
AU - Amarasuriya, Gayan
AU - Poor, H. Vincent
N1 - Funding Information:
This research was supported in part by the Natural Sciences and Engineering Research Council of Canada postdoctoral fellowship program, and in part by the U.S. National Science Foundation under Grant ECCS-1343210.
Publisher Copyright:
© 2015 IEEE.
PY - 2015
Y1 - 2015
N2 - 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.
AB - 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.
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U2 - 10.1109/GLOCOM.2014.7417286
DO - 10.1109/GLOCOM.2014.7417286
M3 - Conference contribution
AN - SCOPUS:84964826924
T3 - 2015 IEEE Global Communications Conference, GLOBECOM 2015
BT - 2015 IEEE Global Communications Conference, GLOBECOM 2015
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 58th IEEE Global Communications Conference, GLOBECOM 2015
Y2 - 6 December 2015 through 10 December 2015
ER -