Joint power allocation and subcarrier pairing in OFDM-based cooperative relaying system

被引：0
作者：
DAI Cui-qin
机构：
来源：
The Journal of China Universities of Posts and Telecommunications | 2012年 / 01期
基金：
中国国家自然科学基金; 国科技部“十一五”科技计划项目;
关键词：
OFDM; DF relaying; power allocation; SP; MR-SP&PA;
D O I：
暂无
中图分类号：
TN919.3 [数据传输技术]; TN925 [无线电中继通信、微波通信];
学科分类号：
080402 ; 080904 ; 0810 ; 081001 ;
摘要：
This paper proposes rate-maximized (MR) joint subcarrier pairing (SP) and power allocation (PA) (MR-SP&PA),a novel scheme for maximizing the weighted sum rate of the orthogonal-frequency-division multiplexing (OFDM) relaying system with a decode-and-forward (DF) relay.MR-SP&PA is based on the joint optimization of both SP and power allocation with total power constraint,and formulated as a mixed integer programming problem in the paper.The programming problem is then transformed to a convex optimization problem by using continuous relaxation,and solved in the Lagrangian dual domain.Simulation results show that MR-SP&PA can maximize the weighted sum rate under total power constraint and outperform equal power allocation (EPA) and proportion power allocation (PCG).
引用
收藏
页码：24 / 30
页数：7
相关论文
共 3 条
  • [1] FDMA capacity of Gaussian multiple-access channels with ISI .2 W. Yu,and J.M. Cioffi. IEEE Transactions on Communications . 2002
  • [2] Power allocation and subcarrierpairing in OFDM-based relaying networks .2 Y.Li,W.Wang,J.Kong,et al. Proc.IEEEICC08 . 2008
  • [3] Cooperative diversity in wireless networks: Efficient protocols and outage behavior .2 J. N. Laneman,D. N. C. Tse,G. W. Wornell. IEEE Transactions on Information Theory . 2002
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