信号空间分集解码前传协同方法研究

在普通解码前传协同分集中，各协同用户之间的信道不对称性会对系统的性能产生一定的影响；同时，简单的重传信号并不是一种高效的利用协同分集的方式。该文提出了一种基于信号空间分集的解码前传协同方法，该方法的协同用户重传信号中包含自己的数据帧，并以信号空间分集的方法设计重传信号，这样既能够减小用户间信道的不对称性带来的影响，又提供了一种更为高效的信号分集方式。仿真实验结果证明该方法与非协同及普通解码前传协同方法相比能够获得更好的误码率性能。

Decode-and-Forward Cooperative Communication with Signal-Space Diversity

In plain decode-and-forward (DF) cooperative diversity, asymmetric inter-user channel can have an impact on the performance of system and simple signal retransmission for each other is not an efficient diversity manner. In this paper, a new DF cooperative scheme based on signal-space diversity is propesed, in which the retransmission signals of each user always contain its own data frame and are designed in signal space diversity (SSD) manner. So the proposed scheme can defeat the effect of asymmetric inter-user channel and utilize diversity more efficiently. Simulation results prove that the new cooperative scheme achieves better bit error rate performance than both plain DF cooperative and non-cooperation scheme.