摘要
针对协作通信中现有的功率分配方法没有考虑节点实际信道状况的缺点,提出一种新的功率分配方法.该方法以B3G/4G协作通信系统模型为基础,定义平均信道功率衰减因子的概念,并基于MCPA设定协作节点的选择门限.仿真结果表明,与现有的全平均分配和门限平均分配相比,该方法在各种信道状况下都有较好的性能,尤其在信道状况恶劣时,对系统性能有较明显改善.
A new power allocation method was proposed to overcome the drawback of existing methods, which did not take the realistic channel state into consideration, in cooperative communication systems. Based on the system model in B3G/4G cooperative communication, the new method presents the definition of MCPA （Mean Channel Power Allocation）, and accordingly sets the selection threshold for cooperative nodes. The simulation results show that, compared to those existing power allocation methods such as equal allocation to all nodes and equal allocation to selected nodes with threshold based on outage probability, the new method exhibits better performance in various kinds of channel condition, which is more pronounced in the situation of bad channel condition.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2009年第7期1125-1128,共4页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金资助项目(60802011
60572157)
关键词
协作通信
功率分配
平均信道功率衰减
cooperative communication
power allocation
mean channel power attenuation（MCPA）
