| 应急通信系统中协作中继选择与功率分配优化 |
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| 引用本文： | 蒋富,彭军.应急通信系统中协作中继选择与功率分配优化[J].计算机工程,2011,37(23):14-16,23. |
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| 作者姓名： | 蒋富 彭军 |
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| 作者单位： | 1. 中南大学 信息科学与工程学院,长沙,410075
2. 中南大学 信息科学与工程学院,长沙410075;轨道交通安全运行控制与通信研究所,长沙410075 |
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| 基金项目： | 国家自然科学基金资助项目，高等学校博士学科点专项科研基金资助项目 |
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| 摘 要： | 为提高应急通信系统的信道容量和能量效率，提出一种协作中继选择与功率分配的联合优化算法。在动态的通信环境中，通过最佳期望选取参与数据传输的协作中继集，提高通信系统的信道容量。为使每个用户及整个网络的能量消耗降到最低，采用凸优化方法，合理分配源节点和多个中继节点之间合理的发射功率。理论分析与仿真实验证明，该算法能以较低的复杂度明显提高系统的信道容量和能量 效率。
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| 关 键 词： | 应急通信 协作通信 中继选择 凸优化 功率分配 信道容量 |
| 收稿时间： | 2011-09-19 |
Cooperative Relay Selection and Power Allocation Optimization in Emergency Communication System |
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| JIANG Fu,PENG Jun.Cooperative Relay Selection and Power Allocation Optimization in Emergency Communication System[J].Computer Engineering,2011,37(23):14-16,23. |
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| Authors: | JIANG Fu PENG Jun |
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| Affiliation: | a,b(a.School of Information Science and Engineering;b.Institute of Communication,Control and Safe Operation for Transportation System,Central South University,Changsha 410075,China) |
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| Abstract: | In order to improve channel capacity and energy efficiency in emergency communication system,a cooperative relay selection and power allocation for joint optimization algorithm is presented.In the dynamic communications environment,it improves communication system channel capacity by selecting the best hope of collaboration in relay set.To minimize user and the whole network energy consumption,through the use of convex optimization methods,a reasonable distribution of the source node and a reasonable number of relay nodes between reasonable transmission power are done.Theoretical analysis and simulation experiments show that the proposed algorithm with lower complexity significantly improves the system＇s channel capacity and energy efficiency. |
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| Keywords: | emergency communication cooperative communication relay selection convex optimization power allocation channel capacity |
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