北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2005, Vol. 28 ›› Issue (4): 58-61.doi: 10.13190/jbupt.200504.58.zhangjm

• 研究报告 • 上一篇    下一篇

基于不同信道状态信息的两跳中继系统最优功率分配

张静美,邵春菊,王莹,张平   

  1. 北京邮电大学 电信工程学院, 北京 100876
  • 出版日期:2005-08-28 发布日期:2005-08-28

Optimal Power Allocation for TwoHop Relaying System with Different Channel State Information

ZHANG Jingmei,SHAO Chunju,WANG Ying,ZHANG Ping   

  1. School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Online:2005-08-28 Published:2005-08-28

摘要:

根据已知瞬时信道状态信息或统计信道状态信息2种情况,分析了不同转发方式下两跳中继系统的信道容量,并以最大化系统容量为优化准则,提出了在发射端和中继器间的最优功率分配方案. 仿真结果表明,与传统的平均功率分配相比,最优功率分配能根据信道状态的变化自适应地调整两跳发射功率,显著提高系统容量.

关键词: 非再生中继, 再生中继, 信道状态信息, 功率分配

Abstract:

Based on the instantaneous or the statistical channel state information, the channel capacity of a twohop relaying system was analyzed according to the different relaying methods. Taking the system capacity as the optimization criterion, an optimal power allocation scheme was proposed to distribute a certain power between the transmitter and the relay station. The numerical results show that, when compared with the uniform power allocation, the optimal power allocation can daptively adjust each hop power based on the different channel conditions, and can utilize the resources efficiently to further improve the system capacity.

Key words: non regenerative relaying, regenerative relaying, channel state information, power allocation

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