一类空时码在协作通信中的应用研究

The Utilization of a Type of STC in Cooperation Communication

该文将一种类似ABBA码的空时分组码进行了扩展,并用于协作分集网络中。分析了此码的可分解特性,讨论了该码的非正交性对性能带来的影响。通过仿真实验,给出了协作节点数目和系统性能之间的关系以及协作节点数的限制。结果表明,对于文中的协作通信系统而言,其中继节点数目为8业已足够,再增加中继数目对于系统性能的提升很小。

In this paper, a new type of Space-Time Block Code （STBC） that is similar to ABBA code is expanded and utilized in CD（Cooperative Diversity） networks. The decomposable character and destructive influence of non-orthogonality of this code is evaluated. The constraint of the number of cooperative nodes and the trade off of which and receive performance is investigated with simulation. The result shows that, for the cooperative communication system this paper proposed, it is enough for 8 relay nodes to participate in cooperation and more relay nodes have little effect on the system performance improvement.