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OFDM双向中继网络中基于网络编码的资源分配策略

DOI: 10.13190/jbupt.201206.107.xiaol, PP. 107-111

Keywords: 资源分配,功率控制,双向中继,网络编码,正交频分复用

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Abstract:

对基于物理层网络编码的正交频分复用(OFDM)双向中继系统中的无线资源分配问题进行了研究,在总功率和用户对速率受限条件下,给出了一种复杂度较低,以最大化系统容量为目标的资源分配策略.利用凸优化技术对子载波内的用户终端和中继节点的功率分配问题进行分析,得到用户终端和中继节点的功率闭合关系表达式.基于该结果,将原优化问题中的三维变量搜索降低为一维变量搜索,较大地降低了算法的复杂度.仿真结果表明,在多种典型场景中,所提方案较传统随机调度分配方案有较大的性能提升,且逼近最优分配方案的性能.

References

[1]  Rankov B, Wittneben A. Spectral efficient protocols for half-duplex fading relay channels [J]. IEEE Journal of Selected Area in Communications, 2007, 25: 379-389.
[2]  Oechtering T J, Schnurr C, Bjelakovic I, et al. Broadcast capacity region of two-phase bidirectional relaying [J]. IEEE Transactions on Information Theory, 2008, 54: 454-458.
[3]  Ding Haiyang, Ge Jianhua, Daniel B, Guo Yi. Outage analysis for multiuser two-way relaying in mixed rayleigh and rician fading [J]. IEEE Communications Letters, 2011, 15: 410-412.
[4]  Zhang Shengli, Liew Soungchang, Lam P P. Hot topic: Physical-layer network coding //Proceedings of the 12th Annual International Conference on Mobile Computing and Networking (MOBICOM’06), Los Angeles, CA, USA, , 2006: 358-365.
[5]  Kim S J, Mitran P, Tarokh V. Performance bounds for bidirectional coded cooperation protocols [J]. IEEE Transaction on Information Theory, 2008, 54: 5235-5241.
[6]  Knopp R. Two-way wireless communication via a relay station //GDRISIS. Paris: , 2007.
[7]  Boyd S, Vandenberghe L. Convex optimization [M]. Cambridge: Cambridge University Press, 2004.
[8]  Yu Wei, Lui Raymond. Dual methods for noncovex spectrum optimization of multicarrier systems [J]. IEEE Transactions on Communications, 2006, 54: 1310-1332.
[9]  3GPP, Spatial channel model for MIMO simulations . TR 25.996 V10.0, Mar.2011. Available:
[10]  Jang Y U, Jeong E R, Lee Y H. A two-step approach power allocation for OFDM signals over two-way amplify-and-forward relay [J]. IEEE Transactions on Signal Processing, 2010, 58: 2426-2430.

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