Journal
IEEE SIGNAL PROCESSING LETTERS
Volume 25, Issue 7, Pages 951-955Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LSP.2018.2802780
Keywords
Full-duplex communications; radio resource management; self-interference; self-energy harvesting; small cells
Categories
Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC) through its Discovery program
- U.S. National Science Foundation [CNS-1702808, ECCS-1647198]
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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.
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