| 基于OFDM技术的多用户子载波分配算法 |
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| 引用本文： | 侯利明,林孝康.基于OFDM技术的多用户子载波分配算法[J].清华大学学报(自然科学版),2009(4). |
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| 作者姓名： | 侯利明 林孝康 |
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| 作者单位： | 清华大学电子工程系;清华大学深圳研究生院; |
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| 基金项目： | 清华-高通联合基金项目 |
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| 摘 要： | 为了提高无线网络频谱利用率,有效地利用系统现有资源,该文在保证用户公平性的前提下提出了一种新的基于余量最大化准则的自适应子载波分配算法。该算法采用分步降解法,将子载波和比特分配分为3部分。第一部分,为每个用户分配一个信道增益最好的子载波,以此确保该用户拥有基本的传输能力;第二部分,根据用户的传输速率比例约束分配剩余子载波;第三部分,根据子载波的分配结果进行比特分配。该算法运算复杂度低,功率消耗少。仿真结果表明该算法优于现有的BABS+ACG资源分配算法。
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| 关 键 词： | 正交频分多址接入 动态子载波分配 功率分配 比例公平性 |
Dynamic subcarrier allocation algorithm for multiuser OFDM-based networks |
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| HOU Liming,LIN Xiaokang.Dynamic subcarrier allocation algorithm for multiuser OFDM-based networks[J].Journal of Tsinghua University(Science and Technology),2009(4). |
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| Authors: | HOU Liming LIN Xiaokang |
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| Institution: | 1.Department of Electronic Engineering;Tsinghua University;Beijing 100084;China;2.Graduate School at Shenzhen;Shenzhen 518057;China |
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| Abstract: | The utilization of the limited spectrum resources in wireless networks is improved by a proportional fairness subcarriers allocation algorithm based on the margin adaptive(MA) principle.The algorithm splits the problem into three segments to reduce the complexity.In the first stage,each user is assigned a subcarrier with the highest channel quality to provide the basic transmission capacity.In the second stage,the residual subcarriers are allocated according to the data rate proportion of each user.Finally,... |
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| Keywords: | orthogonal frequency division multiple access dynamic subcarriers allocation power assignment proportional fairness |
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