应用科学学报 ›› 2014, Vol. 32 ›› Issue (1): 27-31.doi: 10.3969/j.issn.0255-8297.2014.01.005

• 通信工程 • 上一篇    下一篇

CDMA多用户双向中继系统中一种新的功率控制算法

张二伟, 邱玲   

  1. 中国科学技术大学个人通信与扩频实验室,合肥230027
  • 收稿日期:2012-03-01 修回日期:2013-11-26 出版日期:2014-01-31 发布日期:2013-11-26
  • 作者简介:邱玲,教授,博导,研究方向:CDMA通信、无线资源管理、空时信号处理、多用户MIMO、协作通信、绿色通信, E-mail:lqiu@ustc.edu.cn
  • 基金资助:

    中国科大-华为合作项目基金(No.YBWL2010256)资助

Multi-user Two-Way Relay Power Control for CDMA System

ZHANG Er-wei, QIU Ling     

  1. Personal Communications Network and Spectrum Spread Laboratory, University of Science
    and Technology of China, Hefei 230027, China  
  • Received:2012-03-01 Revised:2013-11-26 Online:2014-01-31 Published:2013-11-26

摘要: 针对CDMA多用户双向中继系统,进行第1跳的误比特率拟合近似,获得了一种新的功率控制的效用函数,给出了相应的功率控制迭代算法,并在理论上证明了纳什均衡的存在性和唯一性. 通过仿真验证了上述近似的可靠性,同时验证了所提出的功率控制算法具有收敛速度快以及收敛功率小的优点. 在系统中用户对数目较多的情况下,该算法与传统算法相比能有效降低用户对的平均发射功率.

关键词: CDMA, 功率控制, 多用户双向中继, 误比特率, 纳什均衡

Abstract: For multi-user two-way relay in CDMA systems, bit error rate (BER) of the first jump is approximated,an efficient function of power control obtained, and an iterative algorithm for power control provided.Exsitence and uniqueness of Nash equilibrium is proved theoretically. Simulation results show reliability, fast
convergence, and low power of convergence of the proposed approximation. Compared to traditonal algotithms,the proposed method can reduce the average transmit power with large number of users in the system.

Key words: CDMA, power control, multi-user two-way relay, bit error rate (BER), Nash equilibrium

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