无线网络中机会协作传输及其性能研究  

Research on Opportunistic Cooperative Transmission and Its Performance in Wireless Network

作　　者：颜振亚[1] 郑宝玉[1] 李世唐[1] 

机构地区：[1]南京邮电大学信号处理与传输研究院,江苏南京210003

出　　处：《信号处理》2009年第2期298-302,共5页Journal of Signal Processing

基　　金：国家自然基金资助项目(60372107);江苏省高校自然科学重大基础项目(06KJA510001);江苏省博士创新基金(200670);江苏省自然科学基金重大项目(BK2007729)

摘　　要：研究无线网络中如何利用信道的实时信息(信道幅度)进行机会协作传输及其性能。首先讨论机会协作传输策略;接着从理论上分析不同衰落下机会协作传输的可能性,并给出闭式表达式;然后,分析机会协作传输的功率分配方案以最优化系统性能;最后通过仿真验证性能。仿真结果表明:1)机会协作传输能明显提高性能,而节点间最优功率分配方案则能进一步提高协作传输性能;2)即使协作节点到目的节点的信道统计特性次于源节点到目的节点的信道统计特性,机会协作传输仍能带来明显的性能增益。Opportunistic cooperative transmission and its performance utilizing real information of channel, which means channel amplitude ,in wireless network is discussed in this paper. Scheme of opportunistic cooperative transmission is studied firstly;Secondly, probability of opportunistic cooperative transmission is analyzed in theory under different shading,and mathematic expression of probabil- ity is given. Thirdly, power control is presented in order to reach optimal performance. The performance is verified via simulations in the end. Simulation results show that ： 1 ） Performance can be improved through opportunistic cooperative cooperation and optimal power con- trol between source node and cooperative node can improve performance furtherly;2 ） Performance can be improved obviously even through the statistical characteristic of channel between cooperative node and destination node is worse than the statistical characteristic of channel between source node and destination node.

关 键 词：无线网络 机会 协作传输 中断概率 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]