| 协同分集下AF与DF比较 |
| |
| 引用本文： | 刘威鑫,张忠培,李少谦,张严.协同分集下AF与DF比较[J].电子科技大学学报(社会科学版),2007(5). |
| |
| 作者姓名： | 刘威鑫 张忠培 李少谦 张严 |
| |
| 作者单位： | 电子科技大学通信抗干扰技术国家级重点实验室，电子科技大学通信抗干扰技术国家级重点实验室，电子科技大学通信抗干扰技术国家级重点实验室，展讯通信(上海)有限公司通信系统部 成都610054 展讯通信(上海)有限公司通信系统部上海浦东区201203，成都610054，成都610054，上海浦东区201203 |
| |
| 基金项目： | 中国自然基金(60572090，60472045，60496313)，国家863计划863-317-03-01-05/MII-C3G-05-00支助项目 |
| |
| 摘 要： | 在慢衰落信道中,协同分集是一种新的空间分集方式,其本质是利用分布用户的单天线形成一个虚拟的多天线系统,即形成虚拟MIMO。在其协同方式中,有AF模式和DF模式(编码协同是DF模式的一种特殊情况)。该文针对AF与DF两种基本协同方式进行了详细的比较,并在对称信道和非对称信道下进行了系统的仿真。理论分析和仿真结果表明:在相同的条件下,AF模式相对于DF模式有较大的优势是因为AF模式较DF模式有较大的阵列增益,虽然两者有相同的分集增益,但DF有更大的灵活性。
|
| 关 键 词： | 放大前传 协同分集 解码前传 多用户信息论 传感器网络 |
Comparison of AF and DF under Cooperative Diversity |
| |
| LIU Wei-xin,ZHANG Zhang-pei,LI Shao-qian,ZHANG Yan.Comparison of AF and DF under Cooperative Diversity[J].Journal of University of Electronic Science and Technology of China(Social Sciences Edition),2007(5). |
| |
| Authors: | LIU Wei-xin ZHANG Zhang-pei LI Shao-qian ZHANG Yan |
| |
| Institution: | LIU Wei-xin1,ZHANG Zhang-pei1,LI Shao-qian1,ZHANG Yan2 |
| |
| Abstract: | Cooperative diversity is a new space diversity technology under the slow fading channel. There are two cooperative models, Amplify and Forward (AF) model and Decode and Forward (DF) model (Coded Cooperation (CC) is a special case of DF). A detailed comparison of AF and DF models are given in this paper. The simulations under symmetrical channel and dissymmetrical channel are also given. The results given in this paper show that the AF model has more advantage than the DF model at the same condition from the theory analyses and the simulations. Although they have the same diversity gains, the AF model has bigger array gain than the DF model, Whereas the DF model has more agilities than the AF model. |
| |
| Keywords: | amplify and forward cooperative diversity decode and forward multi-user information theory sensor network |
| 本文献已被 CNKI 等数据库收录！ |
