Optimal power allocation for two-way relaying over OFDM using physical-layer network coding

doi:10.1016/S1005-8885(10)60021-0

Acta Metallurgica Sinica(English letters) ›› 2011, Vol. 18 ›› Issue (1): 9-15.doi: 10.1016/S1005-8885(10)60021-0

Optimal power allocation for two-way relaying over OFDM using physical-layer network coding

华中科技大学电子与信息工程系

收稿日期:2010-05-10 修回日期:2010-11-09 出版日期:2011-02-28 发布日期:2011-02-28
基金资助:
国家自然基金课题;国家自然基金课题;国家自然科学基金;863项目;863项目;国家科技重大专项项目

Optimal power allocation for two-way relaying over OFDM using physical-layer network coding

Received:2010-05-10 Revised:2010-11-09 Online:2011-02-28 Published:2011-02-28
Contact: WANG De-sheng E-mail:dswang@hust.edu.cn

摘要/Abstract

摘要：

In this paper, a network scenario of two-way relaying over orthogonal frequency division multiplexing (OFDM) is considered, in which two nodes intend to exchange the information via a relay using physical-layer network coding (PLNC). Assuming that the full channel knowledge is available, an optimization problem, which maximizes the achievable sum rate under a sum-power constraint, is investigated. It is shown that the optimization problem is non-convex, which is difficult to find the global optimum solution in terms of the computational complexity. In consequence, a low-complexity optimal power allocation scheme is proposed for practice implementation. A link capacity diagram is first employed for power allocation on each subcarrier. Subsequently, an equivalent relaxed optimization problem and Karush-Kuhn-Tucker (KKT) conditions are developed for power allocation among each subcarrier. Simulation results demonstrate that the substantial capacity gains are achieved by implementing the proposed schemes efficiently with a low-complexity computational effort.

关键词:

two-way relaying, power allocation, physical-layer network coding, OFDM

Abstract:

Key words:

two-way relaying, power allocation, physical-layer network coding, OFDM

参考文献

1. Laneman J N, Tse D N C, Wornell G W. Cooperative diversity in wireless networks: efficient protocols and outage behavior. IEEE Transactions on Information Theory, 2004, 50(12): 3062-3080

2. Sendonaris A, Erkip E, Aazhang B. User cooperation diversity, Part I: System description. IEEE Transactions on Communications, 2003, 51(11): 1927-1938

3. Rankov B, Wittneben A. Achievable rate regions for the two-way relay channel. Proceedings of the IEEE International Symposium on Information Theory (ISIT’06), Jul 9-14, 2006, Seattle, WA, USA. Piscataway, NJ, USA: IEEE, 2006: 1668-1672

4. Zhiguo D, Leung K K, Goeckel D L, et al. On the study of network coding with diversity. IEEE Transactions on Wireless Communications, 2009, 8(3): 1247-1259

5. Sang J K, Mitran P, Tarokh V. Performance bounds for bidirectional coded cooperation protocols. IEEE Transactions on Information Theory, 2008, 54(11): 5235-5241

6. Boris R, Armin W. Spectral efficient protocols for half-duplex fading relay channels. IEEE Journal on Selected Areas in Communications, 2007, 25(2): 379-389

7. Zhang S L, Liew S C, Lam P P. Physical-layer network coding. Proceedings of the 12th Annual International Conference on Mobile Computing and Networking (MOBICOM”06), Sep 24-29, 2006, Los Angeles, CA, USA. New York, NY, USA: ACM, 2006: 358-365

8. Shin W J, Lee N Y, Lim J L, et al. An optimal transmit power allocation for the two-way relay channel using physical-layer network coding. Proceedings of the IEEE International Conference on Communications (ICC’09), Jun 14-18, 2009, Dresden, Germany. Piscataway, NJ, USA: IEEE, 2009: 6p

9. Jitvanichphaibool K, Rui Z, Ying C L. Optimal resource allocation for two-way relay-assisted OFDMA. IEEE Transactions on Vehicular Technology, 2009, 58(7): 3311-3321

10. Chin K H, Rui Z, Ying C L. Two-way relaying over OFDM: optimized tone permutation and power allocation. Proceedings of the IEEE International Conference on Communications (ICC’08), May 19-23, 2008, Beijing, China. Piscataway, NJ, USA: IEEE, 2008: 3908-3912

11. Hammerstrom I, Kuhn M, Esli C, et al. MIMO two-way relaying with transmit CSI at the relay. Proceedings of the 8th Workshop on Signal Processing Advances in Wireless Communications (SPAWC’07), Jun 17-20, 2007, Helsinki, Finland. Piscataway, NJ, USA: IEEE, 2007: 5p

12. Rui Z, Chin C C, Ying C L, et al. On capacity region of two-way multi-antenna relay channel with analogue network coding. Proceedings of the IEEE International Conference on Communications (ICC’09), Jun 14-18, 2009, Dresden, Germany. Piscataway, NJ, USA: IEEE, 2009: 25-30

13. Wen Y W, Renbiao W. Capacity maximization for OFDM two-hop relay system with separate power constraints. IEEE Transactions on Vehicular Technology, 2009, 58(9): 4943-4954

14. Wong C Y, Cheng R S, Letief K B, et al. Multiuser OFDM with adaptive subcarrier, bit, and power allocation. IEEE Journal on Selected Areas in Communications, 1999, 17(10): 1747-1758

15. Boyd S, Vandenberghe L. Convex optimization. London, UK: Cambridge University Press, 2004

16. Zhang Q, Zhang J, Shao C, et al. Power allocation for regenerative relay channel with Rayleigh fading. Proceedings of the 59th Vehicular Technology Conference (VTC-Spring’04): Vol 2, May 17-19, 2004, Milan, Italy. Piscataway, NJ, USA: IEEE, 2004: 1167-1171

Optimal power allocation for two-way relaying over OFDM using physical-layer network coding

Optimal power allocation for two-way relaying over OFDM using physical-layer network coding

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