TY - GEN
T1 - Performance analysis of simultaneous wireless information and power transfer in MISO systems
AU - Liu, Chen Feng
AU - Maso, Marco
AU - Lakshminarayana, Subhash
AU - Lee, Chia Han
AU - Quek, Tony Q.S.
N1 - Publisher Copyright:
© 2014 IEEE.
Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2014/3/18
Y1 - 2014/3/18
N2 - A scenario in which a multi-antenna access point (AP) transfers both information and power to a single-antenna user terminal (UT) is considered. The UT harvests energy from the received signals to perform operations such as channel estimation, uplink signaling, and data decoding. Differently from most state-of-the-art works on this subject, a non-zero power consumption for data decoding at the UT is considered. Three cases of practical interest are studied: 1) time-division duplex (TDD) communications, and imperfect channel state information (CSI) at the AP, 2) frequency-division duplex (FDD) communications, and imperfect CSI at the AP, 3) no explicit duplexing scheme and absence of CSI at the AP. Closed-form representations of the ergodic downlink rate, and analytic approximations of the optimal durations of power transfer and channel estimation/feedback phases are derived for the three cases. Numerical findings confirm the accuracy of the analytic results. The presence of CSI at the AP for both considered duplexing schemes, albeit imperfect and resource-demanding, brings significant performance enhancements in simultaneous wireless information and power transfer (SWIPT) systems. Furthermore, the TDD scheme consistently outperforms FDD scheme over practical signal-to-noise ratio (SNR) range, confirming the potential of this duplexing scheme for future energy efficient networks.
AB - A scenario in which a multi-antenna access point (AP) transfers both information and power to a single-antenna user terminal (UT) is considered. The UT harvests energy from the received signals to perform operations such as channel estimation, uplink signaling, and data decoding. Differently from most state-of-the-art works on this subject, a non-zero power consumption for data decoding at the UT is considered. Three cases of practical interest are studied: 1) time-division duplex (TDD) communications, and imperfect channel state information (CSI) at the AP, 2) frequency-division duplex (FDD) communications, and imperfect CSI at the AP, 3) no explicit duplexing scheme and absence of CSI at the AP. Closed-form representations of the ergodic downlink rate, and analytic approximations of the optimal durations of power transfer and channel estimation/feedback phases are derived for the three cases. Numerical findings confirm the accuracy of the analytic results. The presence of CSI at the AP for both considered duplexing schemes, albeit imperfect and resource-demanding, brings significant performance enhancements in simultaneous wireless information and power transfer (SWIPT) systems. Furthermore, the TDD scheme consistently outperforms FDD scheme over practical signal-to-noise ratio (SNR) range, confirming the potential of this duplexing scheme for future energy efficient networks.
UR - http://www.scopus.com/inward/record.url?scp=84946691559&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84946691559&partnerID=8YFLogxK
U2 - 10.1109/GLOCOMW.2014.7063579
DO - 10.1109/GLOCOMW.2014.7063579
M3 - Conference contribution
AN - SCOPUS:84946691559
T3 - 2014 IEEE Globecom Workshops, GC Wkshps 2014
SP - 1094
EP - 1101
BT - 2014 IEEE Globecom Workshops, GC Wkshps 2014
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2014 IEEE Globecom Workshops, GC Wkshps 2014
Y2 - 8 December 2014 through 12 December 2014
ER -