Abstract
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 language | English (US) |
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Pages (from-to) | 951-955 |
Number of pages | 5 |
Journal | IEEE Signal Processing Letters |
Volume | 25 |
Issue number | 7 |
DOIs | |
State | Published - Jul 2018 |
All Science Journal Classification (ASJC) codes
- Signal Processing
- Applied Mathematics
- Electrical and Electronic Engineering
Keywords
- Full-duplex communications
- radio resource management
- self-energy harvesting
- self-interference
- small cells