Journal of Communications and Networks

  • 제14권3호
  • /
  • Pages.257-266
  • /
  • 2012
  • /
  • 1229-2370(pISSN)
  • /
  • 1976-5541(eISSN)
한국통신학회 (The Korean Institute of Commucations and Information Sciences)
권호 표지

Joint Subcarrier Matching and Power Allocation in OFDM Two-Way Relay Systems

  • Vu, Ha Nguyen (Department of Electrical Engineering, University of Ulsan) ;
  • Kong, Hyung-Yun (Department of Electrical Engineering, University of Ulsan)
  • 투고 : 2011.03.20
  • 심사 : 2011.09.21
  • 발행 : 2012.06.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

A decode-and-forward two-way relay system benefits from orthogonal frequency division multiplexing (OFDM) and relay transmission. In this paper, we consider a decode-and-forward two-way relay system over OFDMwith two strategies: A joint subcarrier matching algorithm and a power allocation algorithm operating with a total power constraint for all subcarriers. The two strategies are studied based on average capacity using numerical analysis by uniformly allocating power constraints for each subcarrier matching group. An optimal subcarrier matching algorithm is proposed to match subcarriers in order of channel power gain for both transmission sides. Power allocation is defined based on equally distributing the capacity of each hop in each matching group. Afterward, a modified water-filling algorithm is also considered to allocate the power among all matching groups in order to increase the overall capacity of the network. Finally, Monte Carlo simulations are completed to confirm the numerical results and show the advantages of the joint subcarrier matching, power allocation and water filling algorithms, respectively.

키워드

과제정보

연구 과제 주관 기관 : National Research Foundation of Korea (NRF)

참고문헌

  1. R. Pabst, B. H. Walke, D. C. Schultz, P. Herhold, H. Yanikomeroglu, S. Mukherjee, H. Viswanathan, M. Lott, W. Zirwas, M. Dohler, H. Aghvami, D. D. Falconer, and G. P. Fettweis, "Relay-based deployment concepts for wireless and mobile broadband radio," IEEE Commun. Mag., vol. 42, no. 9, pp. 80-89, 2004. https://doi.org/10.1109/MCOM.2004.1336724
  2. O. Oyman, J. N. Laneman, and S. Sandhu, "Multihop relaying for broadband wireless mesh networks: From theory to practice," IEEE Commun. Mag., vol. 45, no. 11, pp. 116-122, 2007.
  3. C. E. Shannon, "Two-way communication channels," in Proc. Fourth Berkeley Symp. Math. Statist. and Prob., vol. 1, 1961, pp. 611-644.
  4. R. Boris andW. Armin, "Spectral efficient protocols for half-duplex fading relay channels," IEEE J. Sel. Areas Commun., vol. 25, no. 2, pp. 379-389, 2007. https://doi.org/10.1109/JSAC.2007.070213
  5. W. Li, J. Li, and P. Fan, "Network coding for two-way relaying networks over Rayleigh fading channels," IEEE Trans. Veh. Technol., vol. 59, no. 9, pp. 4476-4488, 2010. https://doi.org/10.1109/TVT.2010.2053947
  6. R. Prasad, OFDM for Wireless Communications Systems, Boston: MA, Artech House, 2004.
  7. H. Gacanin and F. Adachi, "Broadband analog network coding," IEEE Trans. Wireless Commun., vol. 9, no. 5, pp. 1577-1583, 2010. https://doi.org/10.1109/TWC.2010.05.091053
  8. H. Shin and J. H. Lee, "Subcarrier allocation for multiuser two-way OFDMA relay networks with fairness constraints," in Proc. VTC-Spring, 2010, pp. 1-5.
  9. C. K. Ho, Z. Rui, and Y.-C. Liang, "Two-way relaying over OFDM: Optimized tone permutation and power allocation," in Proc. IEEE ICC, 2008, pp. 3908-3912.
  10. M. Dong and S. Shahbazpanahi, "Optimal spectrum sharing and power allocation for OFDM-based two-way relaying," in Proc. IEEE ICASSP, 2010, pp. 3310-3313.
  11. W. Wang, S. Yang, and S. Yang, "Optimally joint subcarrier matching and power allocation in OFDM multihop system," EURASIP J. Advances in Signal Process., vol. 2008, pp. 1-8, 2008.
  12. W. Wang and R. Wu, "Capacity maximization for OFDM two-hop relay system With separate power constraints," IEEE Trans. Veh. Technol., vol. 58, no. 9, pp. 4943-4954, 2009. https://doi.org/10.1109/TVT.2009.2024674
  13. Y.Wang, X.-C. Qu, T.Wu, and B.-L. Liu, "Power allocation and subcarrier pairing algorithm for regenerative OFDM relay system," in Proc. VTCSpring, 2007, pp.2727-2731.
  14. A. Papoulis and S. U. Pillai, Probability, Random Variables, and Stochastic Processes, 4th ed. Boston: MA, McGraw-Hill, 2002.
  15. I. S. Gradshteyn, I. M. Ryzhik, A. Jeffrey, and D. Zwillinger, Table of Integrals, Series and Products, 7th ed. Boston: MA, Elsevier, 2007.
  16. D. P. Palomar and J. R. Fonollosa, "Practical algorithms for a family of waterfilling solutions," IEEE Trans. Signal Process., vol. 53, no. 2, pp. 686-695, 2005. https://doi.org/10.1109/TSP.2004.840816
  17. P. Herhold, E. Zimmermann, and G. Fettweis, "A simple cooperative extension to wireless relaying," in Proc. International Zurich Seminar on in Communications, 2004, pp. 36-39.
  18. H. K. G. E. Roberts, Table of Laplace Transforms, W. B. Saunders, 1966.
  19. K.-J. Lee, H. Sung, E. Park, and I. Lee, "Joint optimization for one and two-way MIMO AF multiple-relay systems," IEEE Trans. Wireless Commun., vol. 9, no. 2, pp.3671-3681, 2010. https://doi.org/10.1109/TWC.2010.102210.091021