Computer Science ›› 2015, Vol. 42 ›› Issue (7): 142-145.doi: 10.11896/j.issn.1002-137X.2015.07.031

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Improved Power Allocation Strategy in OFDM Two-way Relaying

PAN Pei-sheng ZHAO Xi-feng   

  • Online:2018-11-14 Published:2018-11-14

Abstract: In order to improve the system sum-capacity of amplify-and-forward scheme for two-way relaying over orthogonal frequency division multiplexing (OFDM),this paper developed a new power allocation strategy with low complexity to maximize the total system rate.This strategy firstly builds a linear power relation between S-R and R-S to simplify the optimization problem from three layers to a layer,so the power allocation problem can be reformulated into a more tractable form and the power proportion between each node and the sub-carrier is obtained with low complexity.Then under the total power constraint,it employes the primal-dual interior-point methods to obtain the power allocation of each sub-carrier pair,and finally it allocates the power of each sub-carrier pair to all nodes.Simulation results show that the proposed power allocation strategy can significantly improve the total system rate,and the performance is improved as the number of sub-carrier increases.

Key words: Two-way relaying,OFDM,Power allocation,Subcarrier matching,Total system rate,Primal-dual interior-point methods

[1] 王东,冯文江,衡玉龙.OFDMA协同通信系统资源分配算法[J].计算机科学,2012,39(5):86-90 Wang Dong,Feng Wen-jiang,Heng Yu-long.Resource allocation algorithm for OFDMA-based cooperative communication systems [J].Computer Science,2012,39(5):86-90
[2] Hammerstrom I,Kuhn M,Esli C,et al.MIMO two-way relaying with transmit CSI at the relay[C]∥IEEE 8th Workshop on Signal Processing Advances in Wireless Communications(SPAWC 2007).IEEE,2007:1-5
[3] Wu Yun-nan,Chou P A,Kung S Y.Information exchange inwireless networks with network coding and physical-layer broadcast[R].MSR-TR-2004,2005
[4] Fan Bin,Wang Wen-bo,Lin Yi-cheng,et al.Subcarrier allocation for OFDMA relay networks with proportional fair constraint[C]∥IEEE International Conference on Communications(ICC’09).IEEE,2009:1-5
[5] Wang Wen-yi,Wu Ren-biao.Capacity maximization for OFDM two-hop relay system with separate power constraints[J].IEEE Transactions on Vehicular Technology,2009,58(9):4943-4954
[6] Shim Y,Park H,Kwon H M.Optimal power allocation for Two-way decode-and-forward relay networks with equal transmit power at source nodes [C]∥2013 IEEE Wireless Communications and Networking Conference (WCNC).IEEE,2013:3335-3340
[7] Ho C K,Zhang Rui,Liang Ying-chang.Two-way relaying over OFDM:optimized tone permutation and power allocation[C]∥IEEE International Conference on Communications(ICC’08).IEEE,2008:3908-3912
[8] Vu H N,Kong H Y.Joint subcarrier matching and power allocation in OFDM two-way relay systems[J].Journal of Communications and Networks,2012,14(3):257-266
[9] 唐伦,刘进,陈前斌,等.OFDM 双向中继子载波配对与功率联合优化[J].北京邮电大学学报,2011,34(s1):85-89 Tang Lun,Liu Tong,Chen Qian-bin,et al.Joint Optimization for Sub-Carrier Pair and Power in OFDM-Based Two-Way Relaying[J].Journal of Beijing University of Posts and Telecommunications,2011,34(s1):85-89
[10] Guo Hui,Ge Jian-hua,Ding Hai-yang.Symbol error probability of Two-way amplify-and-forward relaying[J].Communications Letters,IEEE,2011,15(1):22-24
[11] Tse D N.Optimal power allocation over parallel Gaussian broadcast channels[C]∥IEEE International Symposium on Information Theory.Institute of Electrcal Engineers Inc(IEEE),1997:27-27
[12] Boyd S,Vandenberghe L.Convex optimization[M].Cambridge:Cambridge University Press,2009:1-623
[13] 解可新,韩立兴,林友联.最优化方法[M].天津:天津大学出版社,1997:28-36 Xie Ke-xin,Han Li-xing,Lin You-lian.Optimization methods[M].Tianjin:Tianjin University Press,1997:28-36

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