| 解码转发中继网络基于OFDMA的低复杂度资源分配 |
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| 引用本文： | 唐伦,蒋广健,陈前斌.解码转发中继网络基于OFDMA的低复杂度资源分配[J].应用科学学报,2011,29(5):441-446. |
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| 作者姓名： | 唐伦 蒋广健 陈前斌 |
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| 作者单位： | 重庆邮电大学移动通信技术重点实验室，重庆400065 |
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| 基金项目： | 国家科技重大专项基金(No.2011ZX03003-003-02); 国家自然科学基金(No.60972070,No.61171111); 重庆市自然科学基金(No.CSTC2009BA2090); 重庆市教委项目基金(No.KJ100514)资助; 重庆邮电大学博士启动基金(No.A2011-02); 重庆市科委重点实验室专项经费资助 |
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| 摘 要： | 摘要： 该文研究满足用户速率需求的子载波配对、动态子载波分配和功率分配的联合优化，建立了使传输速率与用户期望速率之差最小化的优化数学模型. 首先提出平均功率分配下基于用户期望速率的子载波配对和动态子载波分配算法(dynamic subcarrier allocation based on expected rate, ERDSA). 为了保证用户的公平性，提出在系统资源不足时按比例减小接入用户期望速率的子载波配对和动态子载波分配算法(enhanced dynamic subcarrier allocation based on expected rate, EERDSA). 由于平均功率分配时，第1 跳子载波与第2 跳子载波的速率存在不完美匹配的问题，进而提出联合子载波配对、动态子载波分配和功率分配算法(dynamic joint subcarrier and power allocation, DJSPA). 分析表明3 种算法的复杂度仅与子载波数呈线性关系，均为低复杂度的优化算法. 仿真表明，这几种算法可满足用户的期望速率，降低系统功耗.
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| 关 键 词： | OFDMA 中继 子载波配对 子载波分配 功率分配 |
| 收稿时间： | 2010-10-14 |
| 修稿时间： | 2011-05-24 |
Low Complexity Resource Allocation in OFDMA-Based Decode-and-Forward Relaying Networks |
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| TANG Lun,JIANG Guang-jian,CHEN Qian-bin.Low Complexity Resource Allocation in OFDMA-Based Decode-and-Forward Relaying Networks[J].Journal of Applied Sciences,2011,29(5):441-446. |
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| Authors: | TANG Lun JIANG Guang-jian CHEN Qian-bin |
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| Institution: | Key Laboratory of Mobile Communication Technology, Chongqing University of Posts and Telecommunications,;
Chongqing 400065, China |
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| Abstract: | This paper addresses joint subcarrier pairing,dynamic subcarrier allocation and power allocation which satisfies user expected rate in OFDMA-based decode-and-forward relaying networks for which users have different expected rate.A mathematical model for minimizing difference between the achievable and expected rates is established.Three algorithms are proposed.First,a joint subcarrier pairing and dynamic subcarrier allocation algorithm(ERDSA) with average power allocation is used.Second,if the system resour... |
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| Keywords: | OFDMA relay subcarrier pairing subcarrier allocation power allocation |
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