Linear precoder design for simultaneous information and energy transfer over two-user MIMO interference channels

Ayca Ozcelikkale, Tolga M. Duman

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Communication strategies that utilize wireless media for simultaneous information and power transfer offer a promising perspective for efficient usage of energy resources. With this motivation, we focus on the design of optimal linear precoders for interference channels utilizing such strategies. We formulate the problem of minimizing the total minimum mean-square error while keeping the energy harvested at the energy receivers above given levels. Our framework leads to a non-convex problem formulation. For point-to-point multiple-input multiple-output channels, we provide a characterization of the optimal solutions under a constraint on the number of transmit antennas. For the general interference scenario, we propose two numerical approaches, one for the single antenna information receivers case, and the other for the general case. We also investigate a hybrid signalling scheme, where the transmitter sends a superposition of two signals: a deterministic signal optimized for energy transfer and an information carrying signal optimized for information and energy transfer. It is illustrated that if hybrid signalling is not incorporated into the transmission scheme, interference can be detrimental to the system performance when the number of antennas at the receivers is low.

Original languageEnglish (US)
Article number7121027
Pages (from-to)5836-5847
Number of pages12
JournalIEEE Transactions on Wireless Communications
Volume14
Issue number10
DOIs
StatePublished - Oct 1 2015
Externally publishedYes

Keywords

  • Interference channels
  • Linear programming
  • Minimization
  • Optimization
  • Receivers
  • Transmitters
  • Wireless communication

ASJC Scopus subject areas

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

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