Is Self-Interference in Full-Duplex Communications a Foe or a Friend?

Animesh Yadav, Octavia A. Dobre, H. Vincent Poor

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


This letter studies the potential of harvesting energy from the self-interference of a full-duplex base station. The base station is equipped with a self-interference cancellation switch, which is turned off for a fraction of the transmission period in order to harvest the energy from the self-interference that arises due to the downlink transmission. For the remaining transmission period, the switch is on such that the uplink transmission takes place simultaneously with the downlink transmission. A novel energy-efficiency maximization problem is formulated for the joint design of downlink beamformers, uplink power allocations, and the transmission time-splitting factor. The optimization problem is nonconvex, and hence, a rapidly converging iterative algorithm is proposed by employing the successive convex approximation approach. Numerical simulation results show significant improvement in the energy-efficiency by allowing self-energy recycling.

Original languageEnglish (US)
Pages (from-to)951-955
Number of pages5
JournalIEEE Signal Processing Letters
Issue number7
StatePublished - Jul 2018

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Applied Mathematics
  • Electrical and Electronic Engineering


  • Full-duplex communications
  • radio resource management
  • self-energy harvesting
  • self-interference
  • small cells


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