Energy-Efficient Configuration of Power Resource for OFDM-Based Opportunistic Regenerative Relay Links

FENG Li; KUANG Yujun; WU Binwei

doi:10.1049/cje.2016.03.022

Volume 25 Issue 2

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FENG Li, KUANG Yujun, WU Binwei, “Energy-Efficient Configuration of Power Resource for OFDM-Based Opportunistic Regenerative Relay Links,” Chinese Journal of Electronics, vol. 25, no. 2, pp. 341-347, 2016, doi: 10.1049/cje.2016.03.022

Citation:

FENG Li, KUANG Yujun, WU Binwei, “Energy-Efficient Configuration of Power Resource for OFDM-Based Opportunistic Regenerative Relay Links,” Chinese Journal of Electronics, vol. 25, no. 2, pp. 341-347, 2016, doi: 10.1049/cje.2016.03.022

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Energy-Efficient Configuration of Power Resource for OFDM-Based Opportunistic Regenerative Relay Links

doi: 10.1049/cje.2016.03.022

1.
School of Communication and Information Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China;
2.
Sichuan Open University, Chengdu 610073, China

Funds: This work is supported by the National Natural Science Foundation of China (No.61201129, No.61071099), the Fundamental Research Funds for the Central Universities (No.2012QNA5046), and the Research Fund of Huawei Corporation.

Received Date: 2014-03-25
Rev Recd Date: 2014-06-11
Publish Date: 2016-03-10

Abstract

Abstract

In this paper, adaptive Power allocation (PA) on the source and relay is investigated to maximize Energy efficiency (EE) for OFDM-based Opportunistic regenerative relay links (O2RL).We derive EE function from O2RL model by appropriate definition of variables to represent source/relay PA, Subcarrier transmission mode selection (STMS), and circuit power consumptions elegantly. Theoretical analysis demonstrates that EE function for O2RL is strictly quasi-concave with respect to the overall transmit power. Exploiting the quasi-concavity property of the EE function, an EE-oriented optimal PA iterative method for O2RL is proposed which used the bisection method to speed up the search of the optimum. Simulation results demonstrate that the O2RL is more energyefficient than Traditional cooperative relaying strategies (TCRS), and the proposed method as compared to the Sum throughput maximization PA (STMPA) method is able to significantly improve performance in terms of system EE.
- Energy efficiency,
- Orthogonal frequency division multiplexing (OFDM),
- Power allocation,
- Regenerative relay

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References(18)

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