协同分集中的联合功率优化分配
The Joined Optimization Power Allocation Under AF Cooperative Diversity
作者：刘威鑫(电子科技大学 通信抗干扰实验室,四川 成都 610054)；张忠培(电子科技大学 通信抗干扰实验室,四川 成都 610054)；李少谦(电子科技大学 通信抗干扰实验室,四川 成都 610054)
Author：(National Key Lab. of Communication, Univ. of Electronic of Sci. and Technol. of China, Chengdu 610054,China)；(National Key Lab. of Communication, Univ. of Electronic of Sci. and Technol. of China, Chengdu 610054,China)；(National Key Lab. of Communication, Univ. of Electronic of Sci. and Technol. of China, Chengdu 610054,China)
收稿日期：2006-04-22 年卷（期）页码：2007,39(4):156-159
期刊名称：工程科学与技术
Journal Name：Advanced Engineering Sciences
关键字：协同分集;联合优化; 放大前传（AF） ;多用户信息论
Key words：cooperative diversity;jointly optimizatin;AF;multiuser information theory
基金项目：国家自然科学基金资助项目（60572090;60472045;60496313）;国家863计划资助项目(863-317-03-01-05/MII-C3G-05-00)
中文摘要
在慢衰落信道中，协同分集是一种新的空间分集方式。在总功率一定的情况下，各个协同节点如何分配功率使性能最优。基于每一个协同节点到目的端节点信道功率和噪声功率是互不相同的。将所有路径的信道和噪声功率进行综合考虑，根据其各自的大小，综合运用注水原理。提出了在目的端最大比合并和发送端最大比合并的联合优化功率分配方法。通过在高斯信道和Rayleigh信道下的仿真,表明：该联合优化算法能够使性能得到提高。同时为降低复杂度，一种次优的算法被提出。
英文摘要
In the slow fading channel,the cooperative diversity is a new space diversityBased on the fact that the power of the channles and noises of the cooperative nodes may be different to the destination node. A new method called jointed power allocation was put forward ,which is maximum ratio combining at the destination node and the transmit-maximum ration combining at each transmiter node with water-filling synthetically. The simulations under Gaussian and Rayleigh channel were carried out. The analytical result and simulations showed that the performance can be improved by this method.At the same time,a suboptimal method was put forward to reduce the complexity.
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