Distributed Power Allocation Algorithm for Cooperative Diversity

FONT face; Verdana; QU Chun-he; YANG Jing; ZHANG Guo-qing; FONT

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Distributed Power Allocation Algorithm for Cooperative Diversity

更新时间：2025-07-16

- Distributed Power Allocation Algorithm for Cooperative Diversity
- Acta Electronica Sinica Vol. 38, Issue 1, Pages: 60-67(2010)
- 作者机构：
  
  1. 中国科学院计算技术研究所,北京,100190
  2. UT斯达康公司,北京,100027
  3. 中国科学院研究生院,北京,100049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN92
- Published：2010
- 稿件说明：
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FONT face, Verdana, QU Chun-he, et al. Distributed Power Allocation Algorithm for Cooperative Diversity[J]. Acta Electronica Sinica, 2010, 38(1): 60-67.
DOI：

FONT face, Verdana, QU Chun-he, et al. Distributed Power Allocation Algorithm for Cooperative Diversity[J]. Acta Electronica Sinica, 2010, 38(1): 60-67. DOI：

摘要

<FONT face=Verdana>本文研究在解码转发协作分集中的功率分配问题.本文首先建立了功率分配问题的数学模型，其能够在满足一定平均误比特率的前提下，使源节点和伙伴节点的发射功率之和最小化，从而不仅能够开发多用户无线系统所固有的空间分集能力，而且能够降低移动节点的能耗和网络中的同道干扰.本文还推导了伙伴节点和目的节点的平均误比特率公式，用于刻画在多径衰落中协作分集系统的性能.利用平均误比特率公式，本文提出了一种分布式的功率分配算法，能够使源节点、伙伴节点和目的节点逐个消息地计算最优的功率分配方案.本文所提出的算法不仅具有较小的控制协议开销，而且对信道状态的变化具有自适应能力.因此，该算法能够适应分布式的和动态的无线网络环境.最后，本文通过仿真验证了所提出的算法.

Abstract

<FONT face=Verdana>In this paper

we study the power allocation problem in decode-and-forward coop erative diversity systems.We first present the mathematical model of the power allocation problem

which can minimize the total power consumption of the source and partner under the average bit error rate (BER) constraints at the partner an d the destination.Accordingly

the model not only can exploit the inherent spati al diversity in multiuser wireless systems

but also can reduce both the energy c onsumption of mobile nodes and the cochannel interference in wireless networks. We then derive the BER expressions at the partner and the destination which can characterize the performance of cooperative diversity systems over multipath fad ing channels.According to the expressions

we propose a distributed power alloca tion algorithm by which the source

the partner and the destination can compute t he optimal power allocation scheme (OPAS) on a message-by-message basis.The p roposed algorithm not only has little overhead but also adapts to the changes of channel state.Therefore

the algorithm can conform to the decentralized and dyna mic nature of wireless networks.In addition

we present simulations to confirm th e proposed algorithm.

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