中文摘要：

针对非协作通信和传统协作通信系统不能达到高天线分集增益的问题，提出基于网络编码的用户协作系统模型。研究了基于网络编码不同协作用户的天线分集增益，并分析非协作机制、传统用户协作机制和基于网络编码用户协作机制的中断概率。理论分析和系统仿真表明，基于网络编码的用户协作系统能显著降低系统中断概率，获得更大的分集增益，且协作用户数越多，系统分集度越好。

英文摘要：

In order to solve the problem that non - cooperative communication and the conventional cooperative communication systems only obtain low antenna diversity gain, a user cooperative system model based on network coding is proposed in this paper. The antenna diversity gain with different users by implementing network coding is investigated, the outage probability performance of non-cooperative communication scheme, traditional user cooperative scheme and network coded user cooperative scheme are analysed. Theoretical analysis and experimental simulation show that cooperative scheme with network coding can reduce the system outage probability remarkably and obtain a higher diversity gain. The more cooperative users, the better diversity gain.