基于OFDM的无线协同网络中的分布式中继选择  

Distributed relay selection in OFDM-based cooperative wireless networks

作　　者：杨文东[1] 蔡跃明 程剑俐 

机构地区：[1]解放军理工大学通信工程学院 [2]解放军95035部队

出　　处：《解放军理工大学学报（自然科学版）》2011年第6期564-568,共5页Journal of PLA University of Science and Technology(Natural Science Edition)

基　　金：国家科技重大专项基金资助项目(2010ZX03006-002-04);国家自然科学基金资助项目(60972051)

摘　　要：协同通信能显著提升无线网络的性能,但其性能受中继选择的影响较大。为了解决基于OFDM的无线协同网络中的中继选择问题,首先给出了中断概率的理论表达式,然后基于不同的选择准则提出了6种不同的中继选择方案。这些方案都只需要本地的信道状态信息,因而可以分布式实现,并且其中一种方案可以达到理论的中断概率。采用蒙特卡洛仿真,结果表明,所提方案可以显著提高OFDM系统的性能。Cooperative communication can significantly enhance the performance of wireless communications.However,its performance is heavily dependent on the relay selection.Relay selection for OFDM-based cooperative wireless networks was investigated.Theoretical outage performance was analyzed and evaluated first.Then six relay selection schemes based on different selection criteria were presented.The outage performance of one of the schemes coincides with the theoretical value and all the schemes need only local CSI and can thus be implemented in a distributed way.Monte Carlo simulations validate our analysis and show that significant performance gain can be obtained compared to that of direct transmission.

关 键 词：协同通信 OFDM 中断概率 中继选择 

分 类 号：TN929.5[电子电信—通信与信息系统]