• ISSN 0258-2724
  • CN 51-1277/U
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Volume 27 Issue 3
May  2014
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Article Contents
Journal of Southwest Jiaotong University  > 2014  >  27(3): 499-506.
HUANG Gaoyong, FANG Xuming, HUANG Bo, CHEN Yu. Scheme for Optimal Energy-Efficient and Resource Allocation in OFDM-Based DF Relay Link[J]. Journal of Southwest Jiaotong University, 2014, 27(3): 499-506. doi: 10.3969/j.issn.0258-2724.2014.03.020
Citation: HUANG Gaoyong, FANG Xuming, HUANG Bo, CHEN Yu. Scheme for Optimal Energy-Efficient and Resource Allocation in OFDM-Based DF Relay Link[J]. Journal of Southwest Jiaotong University, 2014, 27(3): 499-506. doi: 10.3969/j.issn.0258-2724.2014.03.020
shu

Scheme for Optimal Energy-Efficient and Resource Allocation in OFDM-Based DF Relay Link

doi: 10.3969/j.issn.0258-2724.2014.03.020
  • Received Date: 23 Sep 2013
  • Publish Date: 25 Jun 2014
    Abstract
  • The resource allocation problem in OFDM-based DF-Relayed link was formulated as a joint optimization of subcarrier pairing and power allocation while maximizing energy efficiency (EE) with both the minimum rate and the total transmission power constraints. It is proved that the optimal energy-efficient solution under the minimum rate and maximum transmit power constraints for the OFDM-based DF-Relayed link is globally unique. Subsequently, a resource allocation scheme with low complexity was proposed. Simulation results show that compared with the fixed subcarrier pairing strategy, the data rate and EE of the proposed scheme with the subcarriers pairing strategy are respectively increased by 2.3% and 3.1% when the relay node is located at the midpoint position between the source and destination nodes, and Rmin=1.5 Mbit/s. Compared with the traditional equal power allocation scheme, rate maximization and waterfilling power minimization schemes, the proposed scheme achieves the optimal EE while guaranteeing minimum rate requirements and maximum total transmission power constraints.

     

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