| 协作系统中联合功率分配和自适应多电平正交幅度调制算法 |
| |
| 引用本文： | 陈勇,占敖,何晨,蒋铃鸽.协作系统中联合功率分配和自适应多电平正交幅度调制算法[J].上海交通大学学报,2012,46(6):910-915. |
| |
| 作者姓名： | 陈勇 占敖 何晨 蒋铃鸽 |
| |
| 作者单位： | (上海交通大学 信息传输与处理实验室,上海 200240) |
| |
| 基金项目： | 国家高技术研究发展计划(863)项目(2009AA011505);国家自然科学基金资助项目(61172067);国家科技重大专项(2010ZX03003-002-03,2011ZX03003-001-03) |
| |
| 摘 要： | 基于瑞利衰落的单源单宿多中继译码转发（Decode-and-Forward, DF）协作系统，提出了一种联合功率分配和自适应多电平正交幅度调制（M Quadrature Amplitude Modulation, M-QAM）算法.推导出了在高信噪比下系统误符号率（Symbol error ratio, SER）的紧密上界闭式表达式，并在给定系统SER的条件下，得到最小化SER的功率次优分配和实现M QAM自适应速率控制的联合算法.该联合算法仅需要在发送端获得信道统计状态信息（Channel Statistic State Information，CSSI），从而避免了系统信道瞬时状态信息交互的开销.实验仿真表明，在高信噪比下，推导的闭式表达式逼近蒙特卡罗实验结果，提出的联合算法带来了性能增益.
|
| 关 键 词： | 协作通信 译码前传 功率次优分配 自适应 |
| 收稿时间： | 2011-05-25 |
Joint Power Allocation and Adaptive M-QAM Algorithm in Cooperative System |
| |
| CHEN Yong,ZHAN Ao,HE Chen,JIANG Ling-ge.Joint Power Allocation and Adaptive M-QAM Algorithm in Cooperative System[J].Journal of Shanghai Jiaotong University,2012,46(6):910-915. |
| |
| Authors: | CHEN Yong ZHAN Ao HE Chen JIANG Ling-ge |
| |
| Institution: | (Information Transmission and Processing Lab., Shanghai Jiaotong University, Shanghai 200240, China) |
| |
| Abstract: | In a decode-and-forward Rayleigh fading system with relay nodes, this paper derived a tight upper bound on symbol error rate (SER) in the high signal to noise ratio (SNR) regime, and then proposed a joint power allocation and adaptive M-QAM algorithm. The algorithm requires transmission nodes to have only the channel statistic state information (CSSI), which spends fewer overheads than power schemes with channel instantaneous state information (CISI). The simulation results show that the derived upper bound approximates the Monte Carlo results and the proposed algorithm achieves performance gain.
Key words： |
| |
| Keywords: | coopera14tive communication decode-and-forward(DF) suboptimum power allocation adaptive |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《上海交通大学学报》浏览原始摘要信息 |
| 点击此处可从《上海交通大学学报》下载免费的PDF全文 |
