Energy-Efficient Subcarrier Pairing and Power Allocation for DF Relay Networks with an Eavesdropper
AbstractAlgorithms for joint subcarrier pairing and power allocation are investigated in order to maximize the worst-case energy efficiency (EE) in dual-hop decode-and-forward (DF) relay networks in the presence of an active eavesdropper. Accordingly, we study the impact of number of subcarriers on the trade-off in performance between the EE and the spectrum efficiency (SE). The formulated EE optimization problem is the ratio of the secure SE over the entire power consumption in the network, subject to the constraints of total transmit power and subcarrier pairing. A near-optimal iterative algorithm is proposed to perform the subcarrier pairing and power allocation for achieving the maximum EE in the networks. Furthermore, a suboptimal algorithm is proposed with two-step resource allocation. By considering the subcarrier channel quality of the source-to-relay and relay-to-destination links, the subcarrier pairing is first performed, followed by an energy-efficient iterative power allocation scheme to maximize the EE. Numerical results validate the effectiveness and correctness of the proposed algorithms. View Full-Text
Scifeed alert for new publicationsNever miss any articles matching your research from any publisher
- Get alerts for new papers matching your research
- Find out the new papers from selected authors
- Updated daily for 49'000+ journals and 6000+ publishers
- Define your Scifeed now
Singh, K.; Ku, M.-L.; Biswas, S.; Ratnarajah, T. Energy-Efficient Subcarrier Pairing and Power Allocation for DF Relay Networks with an Eavesdropper. Energies 2017, 10, 1953.
Singh K, Ku M-L, Biswas S, Ratnarajah T. Energy-Efficient Subcarrier Pairing and Power Allocation for DF Relay Networks with an Eavesdropper. Energies. 2017; 10(12):1953.Chicago/Turabian Style
Singh, Keshav; Ku, Meng-Lin; Biswas, Sudip; Ratnarajah, Tharmalingam. 2017. "Energy-Efficient Subcarrier Pairing and Power Allocation for DF Relay Networks with an Eavesdropper." Energies 10, no. 12: 1953.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.