| OFDMA解码转发中继系统的最优资源分配 |
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| 引用本文： | 陈凯,张碧玲,刘丹谱,乐光新.OFDMA解码转发中继系统的最优资源分配[J].北京邮电大学学报,2010,33(1):12-17. |
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| 作者姓名： | 陈凯 张碧玲 刘丹谱 乐光新 |
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| 作者单位： | 北京邮电大学,信息与通信工程学院,北京,100876;北京邮电大学,网络教育学院,北京,100088 |
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| 基金项目： | 国家自然科学基金项目(60872049,60871042,60971082,60972073);;国家高技术研究发展计划项目(2007AA10Z235);;国家重点基础研究发展计划项目(2009CB320407);;国家重大科技专项项目(2009ZX03003-001,2009ZX03003-011);;教育部留学归国人员教学、科研建设项目 |
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| 摘 要： | 针对正交频分多址接入-解码转发（OFDMA-DF）中继系统，提出了以最大化系统加权和速率为目标的子载波分配、功率分配、传输方式选择和中继选择联合优化问题. 基于凸优化理论，提出了一种最优资源分配算法，其复杂度仅与子载波数成线性关系. 理论分析和仿真结果表明，结合用户权重的调整，该算法既可实现资源分配的公平性，又可有效利用中继节点的能力，提高系统容量.
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| 关 键 词： | 正交频分多址接入 中继系统 解码转发 最优资源分配 凸优化 |
| 收稿时间： | 2009-4-24 |
| 修稿时间： | 2009-7-14 |
Optimal Resource Allocation in OFDMA-Based Decode-and-Forward Relaying Systems |
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| CHEN Kai,ZHANG Bi-ling,LIU Dan-pu,YUE Guang-xin.Optimal Resource Allocation in OFDMA-Based Decode-and-Forward Relaying Systems[J].Journal of Beijing University of Posts and Telecommunications,2010,33(1):12-17. |
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| Authors: | CHEN Kai ZHANG Bi-ling LIU Dan-pu YUE Guang-xin |
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| Affiliation: | （1.School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China; 2.School of Network Education, Beijing University of Posts and Telecommunications, Beijing 100088, China） |
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| Abstract: | The joint subcarrier allocation, power allocation, transmission mode selection and relay selection optimization problem is addressed in OFDMA-based decode-and-forward relaying systems. Based on convex optimization theory, an optimal resource allocation algorithm is proposed. The complexity of this algorithm is only linear in the number of subcarriers. Simulation results demonstrate that the scheme enhances the system capacity and is able to achieve fair resource allocation by utilizing relays effectively. |
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| Keywords: | orthogonal frequency division multiple access relaying systems decode-and-forward optimal resource allocation convex optimization |
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