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中文摘要：
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。
英文摘要：
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.
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