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In this paper, subcarrier pairing and power allocation are jointly investigated to maximize the energy efficiency (EE) of a dual-hop multicarrier decode-and-forward (DF) relay network. The optimization problem is formulated as a ratio of the spectrum efficiency (SE) over the entire power consumption of the network subject to total power and subcarrier pairing constraints. A near-optimal iterative scheme is proposed to perform the subcarrier pairing and power allocation for achieving the maximum EE of the network. A two-step suboptimal resource allocation scheme is further proposed to reduce the complexity, in which the subcarrier pairing is first performed by considering the channel quality of the source-to-relay (SR) and relay-to-destination (RD) links, followed by an energy-efficient power allocation scheme to maximize the EE. Numerical results are presented to confirm the effectiveness of the proposed schemes and to demonstrate the tradeoff between EE and SE performances.
|Title of host publication||2019 IEEE 89th Vehicular Technology Conference, VTC Spring 2019 - Proceedings|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|State||Published - Apr 2019|
|Event||89th IEEE Vehicular Technology Conference, VTC Spring 2019 - Kuala Lumpur, Malaysia|
Duration: 28 Apr 2019 → 1 May 2019
|Name||IEEE Vehicular Technology Conference|
|Conference||89th IEEE Vehicular Technology Conference, VTC Spring 2019|
|Period||28/04/19 → 1/05/19|
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Exploiting Self-Interference in Full-Duplex Relay Communications: Signal Decoding and Energy Harvesting
1/08/18 → 31/07/19