Performance analysis of simultaneous wireless information and power transfer in MISO systems

Chen Feng Liu, Marco Maso, Subhash Lakshminarayana, Chia-Han Lee, Tony Q.S. Quek

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

1 Scopus citations

Abstract

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.

Original languageEnglish
Title of host publication2014 IEEE Globecom Workshops, GC Wkshps 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1094-1101
Number of pages8
ISBN (Electronic)9781479974702
DOIs
StatePublished - 18 Mar 2014
Event2014 IEEE Globecom Workshops, GC Wkshps 2014 - Austin, United States
Duration: 8 Dec 201412 Dec 2014

Publication series

Name2014 IEEE Globecom Workshops, GC Wkshps 2014

Conference

Conference2014 IEEE Globecom Workshops, GC Wkshps 2014
CountryUnited States
CityAustin
Period8/12/1412/12/14

Keywords

  • Analog feedback
  • Energy harvesting
  • FDD
  • SWIPT
  • TDD
  • Wireless power transfer

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    Liu, C. F., Maso, M., Lakshminarayana, S., Lee, C-H., & Quek, T. Q. S. (2014). Performance analysis of simultaneous wireless information and power transfer in MISO systems. In 2014 IEEE Globecom Workshops, GC Wkshps 2014 (pp. 1094-1101). [7063579] (2014 IEEE Globecom Workshops, GC Wkshps 2014). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/GLOCOMW.2014.7063579