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Two-way中继系统协作节点选择及功率分配策略 被引量：23

Cooperative Node Selection and Power Allocation Strategy in Two-way Relay System
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摘要 为了提高Two-way中继系统总速率,该文提出了一种Two-way AF中继系统的双向中继选择(BRS)策略,该策略通过联合考虑中继节点处的接收信噪比和中继节点到目的节点间的信道增益,实现了最优中继选择。进一步,在最优中继基础上提出了Two-way中继系统两种优化功率分配策略:(1)基于凸优化的功率分配策略(OPA-CO);(2)基于信道增益差异的优化功率分配策略(OPA-DCG)。方案(1)提出了总功率受限的条件下最大化Two-way中继系统总速率的优化模型;方案(2)通过考虑链路之间信道增益的不同,提出了一种速率增量最大化的数学优化模型,为降低求解凸优化模型的复杂度,采用一种迭代功率分配算法求解上述优化模型。仿真结果证明两种策略均能提高系统总速率。 In order to improve the sum-rate of Two-way relay system,this paper proposes a Bi-directional Relay Selection （BRS） scheme in Two-way AF relay system. This scheme selects the optimal relay through joint considering the receive SNR （Signal Noise Rate） at the relay node and the channel gain between relay and destination node; Furthermore,this paper proposes two optimal power allocation scheme in Two-way relay system：（1） Optimal Power Allocation scheme based on Convex Optimization （OPA-CO）,（2） Optimal Power Allocation scheme based on the Differences of Channel Gains （OPA-DCG）; Scheme （1） establishes the optimal issue that how to maximize the sum-rate of Two-way relay system when total power is limited; Scheme （2） establishes a mathematical optimal model that how to maximize the increment of sum-rate based on the differences of channels gains. This paper uses an iterative power allocation algorithm to solve the optimal model mentioned above for the purpose of reducing the complexity of solving convex optimal mode. Simulation result shows that all the schemes mentioned above can improve the sum-rate.
作者 唐伦 刘通 陈前斌 曾孝平
机构地区 重庆邮电大学移动通信技术重点实验室 重庆大学通信工程学院
出处 《电子与信息学报》 EI CSCD 北大核心 2010年第9期2077-2082,共6页 Journal of Electronics & Information Technology
基金 国家自然科学基金(60972070) 国家科技重大专项(2008ZX03003-005) 重庆市自然科学基金重点项目(CSTC2009BA2090)资助课题
关键词 双向中继通信 中继选择 功率分配 放大转发 Two-way relay communication Relay selection Power allocation Amplify-and-forward
分类号 TN925 [电子电信—通信与信息系统]
  • 相关文献

参考文献9

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二级参考文献10

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共引文献11

同被引文献175

  • 1徐侃如,刘威,程文青,冯缜,杨宗凯.一种基于V-BLAST技术的多跳协作式传感器网络的跨层设计[J].传感技术学报,2007,20(12):2688-2694. 被引量：5
  • 2汪琼,张锋.无线传感器网络中的节点协作算法研究[J].传感技术学报,2006,19(2):481-485. 被引量：4
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引证文献23

二级引证文献31

电子与信息学报
2010年 第9期

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