Optimal Beamforming Designs for Wireless Information and Power Transfer in MISO Interference Channels

Hoon Lee, Sang Rim Lee, Kyoung Jae Lee, Han Bae Kong, Inkyu Lee

Research output: Contribution to journalArticlepeer-review

68 Citations (Scopus)

Abstract

This paper investigates the optimal transmit beamforming designs for simultaneous wireless information and power transfer (SWIPT) in multiple-input single-output interference channels (IFC). Based on cooperation level among transmitters and receivsers, we classify the SWIPT IFC systems into two categories. First, we consider the IFC with partial cooperation, where only channel state information (CSI) is available at transmitters and receivers, but not the signal waveform. Second, we examine the IFC with signal cooperation, where both the CSI and the signal waveforms are known to transmitters and receivers. Then, for the both scenarios, we identify the Pareto boundary of the achievable rate-energy (R-E) region which characterizes the optimal tradeoff between the information rate and the harvested energy. To this end, the problems for maximizing the information rate are formulated with minimum required harvested energy constraint. To solve these non-convex problems, we introduce parameterization techniques for characterizing the R-E region. As a result, the original problem is separated into two subproblems, for which closed-form solutions are obtained by addressing the line search method. Finally, we provide numerical examples for the Pareto boundary of the R-E region through simulations.

Original languageEnglish
Article number7097097
Pages (from-to)4810-4821
Number of pages12
JournalIEEE Transactions on Wireless Communications
Volume14
Issue number9
DOIs
Publication statusPublished - 2015 Sep

Keywords

  • Simultaneous wireless information and power transfer
  • multiple antenna techniques
  • rate-energy region

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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