Energy Efficient Online Power Allocation for Two Users with Energy Harvesting

Mateen Ashraf, Jaehoon Jung, Hun Min Shin, Inkyu Lee

Research output: Contribution to journalArticle

1 Citation (Scopus)


In this paper, we propose an online power allocation (PA) method to maximize energy efficiency (EE) in energy harvesting systems with realistic battery constraints for two receivers. The optimization problem in this system configuration is challenging since it has non-convex fractional form and the information of channel quality and the harvested energy can only be obtained causally in practice. To overcome these issues, we design time-average EE maximization through Lyapunov optimization techniques where the transmission power is computed with current battery information and channel fading. Moreover, based on random matrix theory, we present a simplified online EE algorithm. Numerical experiments verify that the proposed PA outperforms conventional online approaches with much reduced computational complexity.

Original languageEnglish
JournalIEEE Signal Processing Letters
Publication statusAccepted/In press - 2018 Jan 1


  • Batteries
  • Energy harvesting
  • Fading channels
  • Optimization
  • Receivers
  • Resource management
  • Transmitters

ASJC Scopus subject areas

  • Signal Processing
  • Electrical and Electronic Engineering
  • Applied Mathematics

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