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access icon free Robust adaptive power control for cognitive radio networks

In this study, the problem of robust adaptive power control (PC) in an underlay cognitive radio network with multiple secondary users (SUs) and primary users (PUs) is considered. Due to the effects of uncertainties (i.e. estimation errors, delays), the optimal PC (resource allocation) cannot guarantee the quality of service of SUs and PUs under imperfect channel state information and interference power of PUs. A robust resource allocation problem is formulated to maximise sum throughput of SUs under individual power constraints and signal-to-interference-and-noise ratio constraints of SUs as well as interference temperature constraints of PUs, whereas channel uncertainties and interference uncertainties induced into the secondary system are modelled by multiplicative uncertainties. Under the worst-case approach, the problem is transformed into a geometric programming problem solved by Lagrange dual methods. The performance of the different algorithms and the impact of uncertainties are discussed according to several simulation results.

References

    1. 1)
      • 28. Dimitris, B., Pachamanova, D., Sim, M.: ‘Robust linear optimization under general norms’, Oper. Res. Lett., 2014, 32, (6), pp. 510516.
    2. 2)
      • 25. Bertsekas, D.P.: ‘Nonlinear processing’ (Athena Scientific, 1999).
    3. 3)
    4. 4)
    5. 5)
    6. 6)
    7. 7)
      • 26. Peng, J., Huang, Z., Zhu, Z.F., et al: ‘A worst-case robust distributed power allocation in OFDM-based cognitive radio networks’. The 32nd Chinese Conrtol Conf., Xi'an, China, July 2013, pp. 64226427.
    8. 8)
    9. 9)
    10. 10)
    11. 11)
      • 2. Xu, Y.J., Zhao, X.H., Liang, Y.C.: ‘Robust power control and beamforming in cognitive radio networks: a survey’, IEEE Commun. Surv. Tutor., 2015, PP, (99), doi: 10.1109/COMST.2015.2425040.
    12. 12)
    13. 13)
    14. 14)
    15. 15)
      • 19. Sun, S.Q., Ni, W.M., Zhu, Y.: ‘Robust power control in cognitive radio networks: a distributed way’. IEEE Int. Conf. Communications, Kyoto, Japan, June 2011, pp. 16.
    16. 16)
      • 22. Tal, A.B., Ghaoui, L.E., Nemirovski, A.: ‘Robust optimization’ (Princeton University, 2009).
    17. 17)
    18. 18)
      • 23. Singh, S., Teal, P.D., Dmochowski, P.A., et al: ‘Power allocation in underlay cognitive radio systems with feasibility detection’. Australian Communications Theory Workshop, Wellington, New Zealand, February 2012, pp. 135139.
    19. 19)
    20. 20)
    21. 21)
    22. 22)
    23. 23)
    24. 24)
    25. 25)
    26. 26)
    27. 27)
    28. 28)
http://iet.metastore.ingenta.com/content/journals/10.1049/iet-spr.2015.0022
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