| 一种子载波配对和功率分配联合最优算法 |
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| 引用本文： | 周岩,沈钊,俞锦.一种子载波配对和功率分配联合最优算法[J].小型微型计算机系统,2012,33(8):1689-1692. |
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| 作者姓名： | 周岩 沈钊 俞锦 |
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| 作者单位： | 1. 海军工程大学电子工程学院,武汉,430033
2. 华中科技大学电子与信息工程系,武汉,430074 |
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| 基金项目： | 国家重大专项基金项目，国家科技支撑计划项目，国家“八六三”高技术研究发展计划项目，新世纪优秀人才支持计划项目，湖北省基金项目 |
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| 摘 要： | 在基于正交频分复用的多载波两跳中继系统中有两个关键的问题亟需解决:子载波间的功率分配和子载波配对.子载波功率分配和配对之间存在复杂的耦合关系,通过现有的方法对子载波功率分配和配对进行联合优化比较困难.在深入研究这种耦合关系的基础上,针对解码转发,利用凸优化思想,提出一种功率受限下的子载波配对和功率分配联合最优算法.仿真结果表明,本算法可以有效提升中继系统的系统容量.
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| 关 键 词： | 中继 凸优化 子载波配对 功率分配 |
Joint Optimization of Subcarrier Pairing and Power Allocation for Decode-and-forward OFDM System |
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| ZHOU Yan
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SHEN Zhao
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YU Jin.Joint Optimization of Subcarrier Pairing and Power Allocation for Decode-and-forward OFDM System[J].Mini-micro Systems,2012,33(8):1689-1692. |
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| Authors: | ZHOU Yan SHEN Zhao YU Jin |
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| Affiliation: | 1(College of Electronic Engineering,Naval University of Engineering,Wuhan 430033,China) 2(Department of Electronics and Information Engineering,Huazhong University of Science & Technology,Wuhan 430074,China) |
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| Abstract: | In the two-hop relay-assisted OFDM system,there are two key problem urgently need to be solved,which are power allocation among the subcarriers and subcarrier pairing,respectively.Owing to the complex coupling relationship existing between power allocation and subcarrier pairing,the jointly optimal of power allocation and subcarrier pairing is a bottleneck.In this paper,the coupling relationship between the two problems is analyzed.The jointly optimal of power allocation and subcarrier pairing for decode-and-forward,with constraints of power limit,formulated as a convex optimization problem is efficiently and globally solved.Simulation results show that substantial system throughput gains are achievable by the proposed joint optimal algorithm for OFDM relay system. |
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| Keywords: | relay convex optimization subcarrier pairing power allocation |
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