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Energy-efficient power allocation for non-regenerative OFDM relay links

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Abstract

We consider a two-hop non-regenerative (amplify-and-forward) relay link with one source, one destination and one relay, in which orthogonal frequency division multiplexing (OFDM) is used. The power allocation (PA) to maximize the energy efficiency for the whole link is investigated under quality of service (Qos) requirement and separate power constraints. An approximation method with low complexity is first proposed to convert the PA problem into a quasi-concave problem, which can obtain a tight lower bound in high SNR region. Furthermore, a more accurate approximation method with higher complexity is raised, which can approach the actual performance both in the low SNR and high SNR regions. We also introduce subcarrier pairing scheme to further enhance the energy efficiency for the link. Simulation results are shown to compare the performance of the two proposed methods.

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References

  1. Laneman J N, Tse D N C, Wornell G W. Cooperative diversity in wireless networks: efficient protocols and outage behavior. IEEE Trans Inf Theory, 2004, 50: 3062–3080

    Article  MathSciNet  Google Scholar 

  2. Zhang Q, Zhang J M, Shao C J, et al. Power allocation for regenerative relay channel with rayleigh fading. In: Proceedings of IEEE Vehicular Technology Conference, Los Angeles, 2004. 1167–1171

  3. Zhang J M, Zhang Q, Shao C J, et al. Adaptive optimal transmit power allocation for two-hop nonregenerative wireless relaying system. In: Proceedings of IEEE Vehicular Technology Conference, Los Angeles, 2004. 1213–1217

  4. Hasna M O, Alouini M S. Optimal power allocation for relayed transmissions over rayleigh-fading channels. IEEE Trans Wirel Commun, 2004, 3: 1999–2004

    Article  Google Scholar 

  5. Hammerstrom I, Wittneben A. On the optimal power allocation for nonregenerative OFDM relay links. In: Proceedings of IEEE International Conference on Communications (ICC), Istanbul, 2006. 4463–4468

  6. Hammerstrom I, Wittneben A. Joint power allocation for nonregenerative MIMO-OFDM relay links. In: Proceedings of IEEE International Acoustics, Speech and Signal Processing Conference, Toulouse, 2006. IV

  7. Wang Y, Wu T, Liu B L. Power allocation and subcarrier pairing algorithm for regenerative OFDM relay system. In: Proceedings of Vehicular Technology Conference, Dublin, 2007. 2727–2731

  8. Zhu H, Himsoon T, Siriwongpairat W P. Resource allocation for multiuser cooperative OFDM networks: who helps whom and how to cooperate. IEEE Trans Veh Technol, 2009, 58: 2378–2391

    Article  Google Scholar 

  9. Sung K Y, Hong Y W P, Chao C C. Resource allocation and partner selection for cooperative multicarrier systems. IEEE Trans Veh Technol, 2011, 60: 3228–3240

    Article  Google Scholar 

  10. Zhu H L, Wang J Z. Chunk-based resource allocation in OFDMA systems-part I: chunk allocation. IEEE Trans Commun, 2009, 57: 2734–2744

    Article  Google Scholar 

  11. Zhu H L, Wang J Z. Chunk-based resource allocation in OFDMA systems-part II: joint chunk, power and bit allocation. IEEE Trans Commun, 2012, 60: 499–509

    Article  Google Scholar 

  12. Gamal A E, Mohseni M, Zahedi S. Bounds on capacity and minimum energy-per-bit for AWGN relay channels. IEEE Trans Inf Theory, 2006, 52: 1545–1561

    Article  Google Scholar 

  13. Li G Y, Xu Z K, Xiong C, Yang C Y, et al. Energy-efficient wireless communications: tutorial, survey, and open issues. IEEE Trans Wirel Commun, 2011, 18: 28–35

    Google Scholar 

  14. Chen Y, Zhang S Q, Xu S G, et al. Fundamental tradeoffs on green wireless networks. IEEE Commun Mag, 2011, 49: 30–37

    Article  Google Scholar 

  15. Boyd S, Vandenberghetion L. Convex Optimization. Cambridge: Cambridge Universury Press, 2004

    MATH  Google Scholar 

  16. Li Y, Wang W, Kong J, et al. Subcarrier pairing for amplify-and-forward and decode-and-forward OFDM relay links. IEEE Commun Lett, 2009, 13: 209–211

    Article  Google Scholar 

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Authors and Affiliations

  1. State Key Laboratory on Microwave and Digital Communications, Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing, 100084, China

    Huan Yu, HaoHao Qin, YunZhou Li, YiFei Zhao, XiBin Xu & Jing Wang

Authors
  1. Huan Yu
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  2. HaoHao Qin
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  3. YunZhou Li
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  4. YiFei Zhao
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  5. XiBin Xu
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  6. Jing Wang
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Corresponding authors

Correspondence to Huan Yu or YunZhou Li.

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Yu, H., Qin, H., Li, Y. et al. Energy-efficient power allocation for non-regenerative OFDM relay links. Sci. China Inf. Sci. 56, 1–8 (2013). https://doi.org/10.1007/s11432-012-4770-9

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  • DOI: https://doi.org/10.1007/s11432-012-4770-9

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